1
1
Fork 0
mirror of https://github.com/NixOS/nix.git synced 2025-12-14 13:01:05 +01:00

Merge remote-tracking branch 'upstream/master' into path-info

This commit is contained in:
John Ericson 2023-02-28 11:34:34 -05:00
commit d12f57c2c0
132 changed files with 2799 additions and 1267 deletions

View file

@ -72,6 +72,7 @@ static int main_build_remote(int argc, char * * argv)
settings.set(name, value);
}
auto maxBuildJobs = settings.maxBuildJobs;
settings.maxBuildJobs.set("1"); // hack to make tests with local?root= work
initPlugins();
@ -112,10 +113,14 @@ static int main_build_remote(int argc, char * * argv)
drvPath = store->parseStorePath(readString(source));
auto requiredFeatures = readStrings<std::set<std::string>>(source);
auto canBuildLocally = amWilling
/* It would be possible to build locally after some builds clear out,
so don't show the warning now: */
bool couldBuildLocally = maxBuildJobs > 0
&& ( neededSystem == settings.thisSystem
|| settings.extraPlatforms.get().count(neededSystem) > 0)
&& allSupportedLocally(*store, requiredFeatures);
/* It's possible to build this locally right now: */
bool canBuildLocally = amWilling && couldBuildLocally;
/* Error ignored here, will be caught later */
mkdir(currentLoad.c_str(), 0777);
@ -214,7 +219,7 @@ static int main_build_remote(int argc, char * * argv)
% concatStringsSep<StringSet>(", ", m.supportedFeatures)
% concatStringsSep<StringSet>(", ", m.mandatoryFeatures);
printMsg(canBuildLocally ? lvlChatty : lvlWarn, error);
printMsg(couldBuildLocally ? lvlChatty : lvlWarn, error);
std::cerr << "# decline\n";
}

View file

@ -4,6 +4,7 @@
#include "derivations.hh"
#include "nixexpr.hh"
#include "profiles.hh"
#include "repl.hh"
#include <nlohmann/json.hpp>
@ -121,12 +122,22 @@ ref<EvalState> EvalCommand::getEvalState()
;
if (startReplOnEvalErrors) {
evalState->debugRepl = &runRepl;
evalState->debugRepl = &AbstractNixRepl::runSimple;
};
}
return ref<EvalState>(evalState);
}
MixOperateOnOptions::MixOperateOnOptions()
{
addFlag({
.longName = "derivation",
.description = "Operate on the [store derivation](../../glossary.md#gloss-store-derivation) rather than its outputs.",
.category = installablesCategory,
.handler = {&operateOn, OperateOn::Derivation},
});
}
BuiltPathsCommand::BuiltPathsCommand(bool recursive)
: recursive(recursive)
{
@ -208,20 +219,6 @@ void StorePathCommand::run(ref<Store> store, std::vector<StorePath> && storePath
run(store, *storePaths.begin());
}
Strings editorFor(const Path & file, uint32_t line)
{
auto editor = getEnv("EDITOR").value_or("cat");
auto args = tokenizeString<Strings>(editor);
if (line > 0 && (
editor.find("emacs") != std::string::npos ||
editor.find("nano") != std::string::npos ||
editor.find("vim") != std::string::npos ||
editor.find("kak") != std::string::npos))
args.push_back(fmt("+%d", line));
args.push_back(file);
return args;
}
MixProfile::MixProfile()
{
addFlag({

View file

@ -94,12 +94,8 @@ struct SourceExprCommand : virtual Args, MixFlakeOptions
{
std::optional<Path> file;
std::optional<std::string> expr;
bool readOnlyMode = false;
// FIXME: move this; not all commands (e.g. 'nix run') use it.
OperateOn operateOn = OperateOn::Output;
SourceExprCommand(bool supportReadOnlyMode = false);
SourceExprCommand();
std::vector<std::shared_ptr<Installable>> parseInstallables(
ref<Store> store, std::vector<std::string> ss);
@ -114,6 +110,11 @@ struct SourceExprCommand : virtual Args, MixFlakeOptions
void completeInstallable(std::string_view prefix);
};
struct MixReadOnlyOption : virtual Args
{
MixReadOnlyOption();
};
/* A command that operates on a list of "installables", which can be
store paths, attribute paths, Nix expressions, etc. */
struct InstallablesCommand : virtual Args, SourceExprCommand
@ -139,7 +140,7 @@ struct InstallableCommand : virtual Args, SourceExprCommand
{
std::shared_ptr<Installable> installable;
InstallableCommand(bool supportReadOnlyMode = false);
InstallableCommand();
void prepare() override;
@ -153,8 +154,15 @@ private:
std::string _installable{"."};
};
struct MixOperateOnOptions : virtual Args
{
OperateOn operateOn = OperateOn::Output;
MixOperateOnOptions();
};
/* A command that operates on zero or more store paths. */
struct BuiltPathsCommand : public InstallablesCommand
struct BuiltPathsCommand : InstallablesCommand, virtual MixOperateOnOptions
{
private:
@ -227,10 +235,6 @@ static RegisterCommand registerCommand2(std::vector<std::string> && name)
return RegisterCommand(std::move(name), [](){ return make_ref<T>(); });
}
/* Helper function to generate args that invoke $EDITOR on
filename:lineno. */
Strings editorFor(const Path & file, uint32_t line);
struct MixProfile : virtual StoreCommand
{
std::optional<Path> profile;
@ -280,8 +284,4 @@ void printClosureDiff(
const StorePath & afterPath,
std::string_view indent);
void runRepl(
ref<EvalState> evalState,
const ValMap & extraEnv);
}

20
src/libcmd/editor-for.cc Normal file
View file

@ -0,0 +1,20 @@
#include "util.hh"
#include "editor-for.hh"
namespace nix {
Strings editorFor(const Path & file, uint32_t line)
{
auto editor = getEnv("EDITOR").value_or("cat");
auto args = tokenizeString<Strings>(editor);
if (line > 0 && (
editor.find("emacs") != std::string::npos ||
editor.find("nano") != std::string::npos ||
editor.find("vim") != std::string::npos ||
editor.find("kak") != std::string::npos))
args.push_back(fmt("+%d", line));
args.push_back(file);
return args;
}
}

11
src/libcmd/editor-for.hh Normal file
View file

@ -0,0 +1,11 @@
#pragma once
#include "types.hh"
namespace nix {
/* Helper function to generate args that invoke $EDITOR on
filename:lineno. */
Strings editorFor(const Path & file, uint32_t line);
}

View file

@ -0,0 +1,109 @@
#include "globals.hh"
#include "installable-attr-path.hh"
#include "outputs-spec.hh"
#include "util.hh"
#include "command.hh"
#include "attr-path.hh"
#include "common-eval-args.hh"
#include "derivations.hh"
#include "eval-inline.hh"
#include "eval.hh"
#include "get-drvs.hh"
#include "store-api.hh"
#include "shared.hh"
#include "flake/flake.hh"
#include "eval-cache.hh"
#include "url.hh"
#include "registry.hh"
#include "build-result.hh"
#include <regex>
#include <queue>
#include <nlohmann/json.hpp>
namespace nix {
InstallableAttrPath::InstallableAttrPath(
ref<EvalState> state,
SourceExprCommand & cmd,
Value * v,
const std::string & attrPath,
ExtendedOutputsSpec extendedOutputsSpec)
: InstallableValue(state)
, cmd(cmd)
, v(allocRootValue(v))
, attrPath(attrPath)
, extendedOutputsSpec(std::move(extendedOutputsSpec))
{ }
std::pair<Value *, PosIdx> InstallableAttrPath::toValue(EvalState & state)
{
auto [vRes, pos] = findAlongAttrPath(state, attrPath, *cmd.getAutoArgs(state), **v);
state.forceValue(*vRes, pos);
return {vRes, pos};
}
DerivedPathsWithInfo InstallableAttrPath::toDerivedPaths()
{
auto v = toValue(*state).first;
Bindings & autoArgs = *cmd.getAutoArgs(*state);
DrvInfos drvInfos;
getDerivations(*state, *v, "", autoArgs, drvInfos, false);
// Backward compatibility hack: group results by drvPath. This
// helps keep .all output together.
std::map<StorePath, OutputsSpec> byDrvPath;
for (auto & drvInfo : drvInfos) {
auto drvPath = drvInfo.queryDrvPath();
if (!drvPath)
throw Error("'%s' is not a derivation", what());
auto newOutputs = std::visit(overloaded {
[&](const ExtendedOutputsSpec::Default & d) -> OutputsSpec {
std::set<std::string> outputsToInstall;
for (auto & output : drvInfo.queryOutputs(false, true))
outputsToInstall.insert(output.first);
return OutputsSpec::Names { std::move(outputsToInstall) };
},
[&](const ExtendedOutputsSpec::Explicit & e) -> OutputsSpec {
return e;
},
}, extendedOutputsSpec.raw());
auto [iter, didInsert] = byDrvPath.emplace(*drvPath, newOutputs);
if (!didInsert)
iter->second = iter->second.union_(newOutputs);
}
DerivedPathsWithInfo res;
for (auto & [drvPath, outputs] : byDrvPath)
res.push_back({
.path = DerivedPath::Built {
.drvPath = drvPath,
.outputs = outputs,
},
});
return res;
}
InstallableAttrPath InstallableAttrPath::parse(
ref<EvalState> state,
SourceExprCommand & cmd,
Value * v,
std::string_view prefix,
ExtendedOutputsSpec extendedOutputsSpec)
{
return {
state, cmd, v,
prefix == "." ? "" : std::string { prefix },
extendedOutputsSpec
};
}
}

View file

@ -0,0 +1,56 @@
#include "globals.hh"
#include "installable-value.hh"
#include "outputs-spec.hh"
#include "util.hh"
#include "command.hh"
#include "attr-path.hh"
#include "common-eval-args.hh"
#include "derivations.hh"
#include "eval-inline.hh"
#include "eval.hh"
#include "get-drvs.hh"
#include "store-api.hh"
#include "shared.hh"
#include "eval-cache.hh"
#include "url.hh"
#include "registry.hh"
#include "build-result.hh"
#include <regex>
#include <queue>
#include <nlohmann/json.hpp>
namespace nix {
class InstallableAttrPath : public InstallableValue
{
SourceExprCommand & cmd;
RootValue v;
std::string attrPath;
ExtendedOutputsSpec extendedOutputsSpec;
InstallableAttrPath(
ref<EvalState> state,
SourceExprCommand & cmd,
Value * v,
const std::string & attrPath,
ExtendedOutputsSpec extendedOutputsSpec);
std::string what() const override { return attrPath; };
std::pair<Value *, PosIdx> toValue(EvalState & state) override;
DerivedPathsWithInfo toDerivedPaths() override;
public:
static InstallableAttrPath parse(
ref<EvalState> state,
SourceExprCommand & cmd,
Value * v,
std::string_view prefix,
ExtendedOutputsSpec extendedOutputsSpec);
};
}

View file

@ -0,0 +1,70 @@
#include "installable-derived-path.hh"
#include "derivations.hh"
namespace nix {
std::string InstallableDerivedPath::what() const
{
return derivedPath.to_string(*store);
}
DerivedPathsWithInfo InstallableDerivedPath::toDerivedPaths()
{
return {{.path = derivedPath, .info = {} }};
}
std::optional<StorePath> InstallableDerivedPath::getStorePath()
{
return std::visit(overloaded {
[&](const DerivedPath::Built & bfd) {
return bfd.drvPath;
},
[&](const DerivedPath::Opaque & bo) {
return bo.path;
},
}, derivedPath.raw());
}
InstallableDerivedPath InstallableDerivedPath::parse(
ref<Store> store,
std::string_view prefix,
ExtendedOutputsSpec extendedOutputsSpec)
{
auto derivedPath = std::visit(overloaded {
// If the user did not use ^, we treat the output more liberally.
[&](const ExtendedOutputsSpec::Default &) -> DerivedPath {
// First, we accept a symlink chain or an actual store path.
auto storePath = store->followLinksToStorePath(prefix);
// Second, we see if the store path ends in `.drv` to decide what sort
// of derived path they want.
//
// This handling predates the `^` syntax. The `^*` in
// `/nix/store/hash-foo.drv^*` unambiguously means "do the
// `DerivedPath::Built` case", so plain `/nix/store/hash-foo.drv` could
// also unambiguously mean "do the DerivedPath::Opaque` case".
//
// Issue #7261 tracks reconsidering this `.drv` dispatching.
return storePath.isDerivation()
? (DerivedPath) DerivedPath::Built {
.drvPath = std::move(storePath),
.outputs = OutputsSpec::All {},
}
: (DerivedPath) DerivedPath::Opaque {
.path = std::move(storePath),
};
},
// If the user did use ^, we just do exactly what is written.
[&](const ExtendedOutputsSpec::Explicit & outputSpec) -> DerivedPath {
return DerivedPath::Built {
.drvPath = store->parseStorePath(prefix),
.outputs = outputSpec,
};
},
}, extendedOutputsSpec.raw());
return InstallableDerivedPath {
store,
std::move(derivedPath),
};
}
}

View file

@ -0,0 +1,28 @@
#pragma once
#include "installables.hh"
namespace nix {
struct InstallableDerivedPath : Installable
{
ref<Store> store;
DerivedPath derivedPath;
InstallableDerivedPath(ref<Store> store, DerivedPath && derivedPath)
: store(store), derivedPath(std::move(derivedPath))
{ }
std::string what() const override;
DerivedPathsWithInfo toDerivedPaths() override;
std::optional<StorePath> getStorePath() override;
static InstallableDerivedPath parse(
ref<Store> store,
std::string_view prefix,
ExtendedOutputsSpec extendedOutputsSpec);
};
}

View file

@ -0,0 +1,236 @@
#include "globals.hh"
#include "installable-flake.hh"
#include "installable-derived-path.hh"
#include "outputs-spec.hh"
#include "util.hh"
#include "command.hh"
#include "attr-path.hh"
#include "common-eval-args.hh"
#include "derivations.hh"
#include "eval-inline.hh"
#include "eval.hh"
#include "get-drvs.hh"
#include "store-api.hh"
#include "shared.hh"
#include "flake/flake.hh"
#include "eval-cache.hh"
#include "url.hh"
#include "registry.hh"
#include "build-result.hh"
#include <regex>
#include <queue>
#include <nlohmann/json.hpp>
namespace nix {
std::vector<std::string> InstallableFlake::getActualAttrPaths()
{
std::vector<std::string> res;
for (auto & prefix : prefixes)
res.push_back(prefix + *attrPaths.begin());
for (auto & s : attrPaths)
res.push_back(s);
return res;
}
Value * InstallableFlake::getFlakeOutputs(EvalState & state, const flake::LockedFlake & lockedFlake)
{
auto vFlake = state.allocValue();
callFlake(state, lockedFlake, *vFlake);
auto aOutputs = vFlake->attrs->get(state.symbols.create("outputs"));
assert(aOutputs);
state.forceValue(*aOutputs->value, [&]() { return aOutputs->value->determinePos(noPos); });
return aOutputs->value;
}
static std::string showAttrPaths(const std::vector<std::string> & paths)
{
std::string s;
for (const auto & [n, i] : enumerate(paths)) {
if (n > 0) s += n + 1 == paths.size() ? " or " : ", ";
s += '\''; s += i; s += '\'';
}
return s;
}
InstallableFlake::InstallableFlake(
SourceExprCommand * cmd,
ref<EvalState> state,
FlakeRef && flakeRef,
std::string_view fragment,
ExtendedOutputsSpec extendedOutputsSpec,
Strings attrPaths,
Strings prefixes,
const flake::LockFlags & lockFlags)
: InstallableValue(state),
flakeRef(flakeRef),
attrPaths(fragment == "" ? attrPaths : Strings{(std::string) fragment}),
prefixes(fragment == "" ? Strings{} : prefixes),
extendedOutputsSpec(std::move(extendedOutputsSpec)),
lockFlags(lockFlags)
{
if (cmd && cmd->getAutoArgs(*state)->size())
throw UsageError("'--arg' and '--argstr' are incompatible with flakes");
}
DerivedPathsWithInfo InstallableFlake::toDerivedPaths()
{
Activity act(*logger, lvlTalkative, actUnknown, fmt("evaluating derivation '%s'", what()));
auto attr = getCursor(*state);
auto attrPath = attr->getAttrPathStr();
if (!attr->isDerivation()) {
// FIXME: use eval cache?
auto v = attr->forceValue();
if (v.type() == nPath) {
PathSet context;
auto storePath = state->copyPathToStore(context, Path(v.path));
return {{
.path = DerivedPath::Opaque {
.path = std::move(storePath),
}
}};
}
else if (v.type() == nString) {
PathSet context;
auto s = state->forceString(v, context, noPos, fmt("while evaluating the flake output attribute '%s'", attrPath));
auto storePath = state->store->maybeParseStorePath(s);
if (storePath && context.count(std::string(s))) {
return {{
.path = DerivedPath::Opaque {
.path = std::move(*storePath),
}
}};
} else
throw Error("flake output attribute '%s' evaluates to the string '%s' which is not a store path", attrPath, s);
}
else
throw Error("flake output attribute '%s' is not a derivation or path", attrPath);
}
auto drvPath = attr->forceDerivation();
std::optional<NixInt> priority;
if (attr->maybeGetAttr(state->sOutputSpecified)) {
} else if (auto aMeta = attr->maybeGetAttr(state->sMeta)) {
if (auto aPriority = aMeta->maybeGetAttr("priority"))
priority = aPriority->getInt();
}
return {{
.path = DerivedPath::Built {
.drvPath = std::move(drvPath),
.outputs = std::visit(overloaded {
[&](const ExtendedOutputsSpec::Default & d) -> OutputsSpec {
std::set<std::string> outputsToInstall;
if (auto aOutputSpecified = attr->maybeGetAttr(state->sOutputSpecified)) {
if (aOutputSpecified->getBool()) {
if (auto aOutputName = attr->maybeGetAttr("outputName"))
outputsToInstall = { aOutputName->getString() };
}
} else if (auto aMeta = attr->maybeGetAttr(state->sMeta)) {
if (auto aOutputsToInstall = aMeta->maybeGetAttr("outputsToInstall"))
for (auto & s : aOutputsToInstall->getListOfStrings())
outputsToInstall.insert(s);
}
if (outputsToInstall.empty())
outputsToInstall.insert("out");
return OutputsSpec::Names { std::move(outputsToInstall) };
},
[&](const ExtendedOutputsSpec::Explicit & e) -> OutputsSpec {
return e;
},
}, extendedOutputsSpec.raw()),
},
.info = {
.priority = priority,
.originalRef = flakeRef,
.resolvedRef = getLockedFlake()->flake.lockedRef,
.attrPath = attrPath,
.extendedOutputsSpec = extendedOutputsSpec,
}
}};
}
std::pair<Value *, PosIdx> InstallableFlake::toValue(EvalState & state)
{
return {&getCursor(state)->forceValue(), noPos};
}
std::vector<ref<eval_cache::AttrCursor>>
InstallableFlake::getCursors(EvalState & state)
{
auto evalCache = openEvalCache(state,
std::make_shared<flake::LockedFlake>(lockFlake(state, flakeRef, lockFlags)));
auto root = evalCache->getRoot();
std::vector<ref<eval_cache::AttrCursor>> res;
Suggestions suggestions;
auto attrPaths = getActualAttrPaths();
for (auto & attrPath : attrPaths) {
debug("trying flake output attribute '%s'", attrPath);
auto attr = root->findAlongAttrPath(parseAttrPath(state, attrPath));
if (attr) {
res.push_back(ref(*attr));
} else {
suggestions += attr.getSuggestions();
}
}
if (res.size() == 0)
throw Error(
suggestions,
"flake '%s' does not provide attribute %s",
flakeRef,
showAttrPaths(attrPaths));
return res;
}
std::shared_ptr<flake::LockedFlake> InstallableFlake::getLockedFlake() const
{
if (!_lockedFlake) {
flake::LockFlags lockFlagsApplyConfig = lockFlags;
lockFlagsApplyConfig.applyNixConfig = true;
_lockedFlake = std::make_shared<flake::LockedFlake>(lockFlake(*state, flakeRef, lockFlagsApplyConfig));
}
return _lockedFlake;
}
FlakeRef InstallableFlake::nixpkgsFlakeRef() const
{
auto lockedFlake = getLockedFlake();
if (auto nixpkgsInput = lockedFlake->lockFile.findInput({"nixpkgs"})) {
if (auto lockedNode = std::dynamic_pointer_cast<const flake::LockedNode>(nixpkgsInput)) {
debug("using nixpkgs flake '%s'", lockedNode->lockedRef);
return std::move(lockedNode->lockedRef);
}
}
return Installable::nixpkgsFlakeRef();
}
}

View file

@ -0,0 +1,50 @@
#pragma once
#include "installable-value.hh"
namespace nix {
struct InstallableFlake : InstallableValue
{
FlakeRef flakeRef;
Strings attrPaths;
Strings prefixes;
ExtendedOutputsSpec extendedOutputsSpec;
const flake::LockFlags & lockFlags;
mutable std::shared_ptr<flake::LockedFlake> _lockedFlake;
InstallableFlake(
SourceExprCommand * cmd,
ref<EvalState> state,
FlakeRef && flakeRef,
std::string_view fragment,
ExtendedOutputsSpec extendedOutputsSpec,
Strings attrPaths,
Strings prefixes,
const flake::LockFlags & lockFlags);
std::string what() const override { return flakeRef.to_string() + "#" + *attrPaths.begin(); }
std::vector<std::string> getActualAttrPaths();
Value * getFlakeOutputs(EvalState & state, const flake::LockedFlake & lockedFlake);
DerivedPathsWithInfo toDerivedPaths() override;
std::pair<Value *, PosIdx> toValue(EvalState & state) override;
/* Get a cursor to every attrpath in getActualAttrPaths()
that exists. However if none exists, throw an exception. */
std::vector<ref<eval_cache::AttrCursor>>
getCursors(EvalState & state) override;
std::shared_ptr<flake::LockedFlake> getLockedFlake() const;
FlakeRef nixpkgsFlakeRef() const override;
};
ref<eval_cache::EvalCache> openEvalCache(
EvalState & state,
std::shared_ptr<flake::LockedFlake> lockedFlake);
}

View file

@ -0,0 +1,14 @@
#pragma once
#include "installables.hh"
namespace nix {
struct InstallableValue : Installable
{
ref<EvalState> state;
InstallableValue(ref<EvalState> state) : state(state) {}
};
}

View file

@ -1,5 +1,8 @@
#include "globals.hh"
#include "installables.hh"
#include "installable-derived-path.hh"
#include "installable-attr-path.hh"
#include "installable-flake.hh"
#include "outputs-spec.hh"
#include "util.hh"
#include "command.hh"
@ -144,7 +147,7 @@ void MixFlakeOptions::completionHook()
completeFlakeInput(*prefix);
}
SourceExprCommand::SourceExprCommand(bool supportReadOnlyMode)
SourceExprCommand::SourceExprCommand()
{
addFlag({
.longName = "file",
@ -166,24 +169,18 @@ SourceExprCommand::SourceExprCommand(bool supportReadOnlyMode)
.labels = {"expr"},
.handler = {&expr}
});
}
MixReadOnlyOption::MixReadOnlyOption()
{
addFlag({
.longName = "derivation",
.description = "Operate on the [store derivation](../../glossary.md#gloss-store-derivation) rather than its outputs.",
.category = installablesCategory,
.handler = {&operateOn, OperateOn::Derivation},
.longName = "read-only",
.description =
"Do not instantiate each evaluated derivation. "
"This improves performance, but can cause errors when accessing "
"store paths of derivations during evaluation.",
.handler = {&settings.readOnlyMode, true},
});
if (supportReadOnlyMode) {
addFlag({
.longName = "read-only",
.description =
"Do not instantiate each evaluated derivation. "
"This improves performance, but can cause errors when accessing "
"store paths of derivations during evaluation.",
.handler = {&readOnlyMode, true},
});
}
}
Strings SourceExprCommand::getDefaultFlakeAttrPaths()
@ -396,143 +393,6 @@ static StorePath getDeriver(
return *derivers.begin();
}
struct InstallableStorePath : Installable
{
ref<Store> store;
DerivedPath req;
InstallableStorePath(ref<Store> store, DerivedPath && req)
: store(store), req(std::move(req))
{ }
std::string what() const override
{
return req.to_string(*store);
}
DerivedPathsWithInfo toDerivedPaths() override
{
return {{.path = req, .info = {} }};
}
std::optional<StorePath> getStorePath() override
{
return std::visit(overloaded {
[&](const DerivedPath::Built & bfd) {
return bfd.drvPath;
},
[&](const DerivedPath::Opaque & bo) {
return bo.path;
},
}, req.raw());
}
};
struct InstallableAttrPath : InstallableValue
{
SourceExprCommand & cmd;
RootValue v;
std::string attrPath;
ExtendedOutputsSpec extendedOutputsSpec;
InstallableAttrPath(
ref<EvalState> state,
SourceExprCommand & cmd,
Value * v,
const std::string & attrPath,
ExtendedOutputsSpec extendedOutputsSpec)
: InstallableValue(state)
, cmd(cmd)
, v(allocRootValue(v))
, attrPath(attrPath)
, extendedOutputsSpec(std::move(extendedOutputsSpec))
{ }
std::string what() const override { return attrPath; }
std::pair<Value *, PosIdx> toValue(EvalState & state) override
{
auto [vRes, pos] = findAlongAttrPath(state, attrPath, *cmd.getAutoArgs(state), **v);
state.forceValue(*vRes, pos);
return {vRes, pos};
}
DerivedPathsWithInfo toDerivedPaths() override
{
auto v = toValue(*state).first;
Bindings & autoArgs = *cmd.getAutoArgs(*state);
DrvInfos drvInfos;
getDerivations(*state, *v, "", autoArgs, drvInfos, false);
// Backward compatibility hack: group results by drvPath. This
// helps keep .all output together.
std::map<StorePath, OutputsSpec> byDrvPath;
for (auto & drvInfo : drvInfos) {
auto drvPath = drvInfo.queryDrvPath();
if (!drvPath)
throw Error("'%s' is not a derivation", what());
auto newOutputs = std::visit(overloaded {
[&](const ExtendedOutputsSpec::Default & d) -> OutputsSpec {
std::set<std::string> outputsToInstall;
for (auto & output : drvInfo.queryOutputs(false, true))
outputsToInstall.insert(output.first);
return OutputsSpec::Names { std::move(outputsToInstall) };
},
[&](const ExtendedOutputsSpec::Explicit & e) -> OutputsSpec {
return e;
},
}, extendedOutputsSpec.raw());
auto [iter, didInsert] = byDrvPath.emplace(*drvPath, newOutputs);
if (!didInsert)
iter->second = iter->second.union_(newOutputs);
}
DerivedPathsWithInfo res;
for (auto & [drvPath, outputs] : byDrvPath)
res.push_back({
.path = DerivedPath::Built {
.drvPath = drvPath,
.outputs = outputs,
},
});
return res;
}
};
std::vector<std::string> InstallableFlake::getActualAttrPaths()
{
std::vector<std::string> res;
for (auto & prefix : prefixes)
res.push_back(prefix + *attrPaths.begin());
for (auto & s : attrPaths)
res.push_back(s);
return res;
}
Value * InstallableFlake::getFlakeOutputs(EvalState & state, const flake::LockedFlake & lockedFlake)
{
auto vFlake = state.allocValue();
callFlake(state, lockedFlake, *vFlake);
auto aOutputs = vFlake->attrs->get(state.symbols.create("outputs"));
assert(aOutputs);
state.forceValue(*aOutputs->value, [&]() { return aOutputs->value->determinePos(noPos); });
return aOutputs->value;
}
ref<eval_cache::EvalCache> openEvalCache(
EvalState & state,
std::shared_ptr<flake::LockedFlake> lockedFlake)
@ -562,196 +422,11 @@ ref<eval_cache::EvalCache> openEvalCache(
});
}
static std::string showAttrPaths(const std::vector<std::string> & paths)
{
std::string s;
for (const auto & [n, i] : enumerate(paths)) {
if (n > 0) s += n + 1 == paths.size() ? " or " : ", ";
s += '\''; s += i; s += '\'';
}
return s;
}
InstallableFlake::InstallableFlake(
SourceExprCommand * cmd,
ref<EvalState> state,
FlakeRef && flakeRef,
std::string_view fragment,
ExtendedOutputsSpec extendedOutputsSpec,
Strings attrPaths,
Strings prefixes,
const flake::LockFlags & lockFlags)
: InstallableValue(state),
flakeRef(flakeRef),
attrPaths(fragment == "" ? attrPaths : Strings{(std::string) fragment}),
prefixes(fragment == "" ? Strings{} : prefixes),
extendedOutputsSpec(std::move(extendedOutputsSpec)),
lockFlags(lockFlags)
{
if (cmd && cmd->getAutoArgs(*state)->size())
throw UsageError("'--arg' and '--argstr' are incompatible with flakes");
}
DerivedPathsWithInfo InstallableFlake::toDerivedPaths()
{
Activity act(*logger, lvlTalkative, actUnknown, fmt("evaluating derivation '%s'", what()));
auto attr = getCursor(*state);
auto attrPath = attr->getAttrPathStr();
if (!attr->isDerivation()) {
// FIXME: use eval cache?
auto v = attr->forceValue();
if (v.type() == nPath) {
PathSet context;
auto storePath = state->copyPathToStore(context, Path(v.path));
return {{
.path = DerivedPath::Opaque {
.path = std::move(storePath),
}
}};
}
else if (v.type() == nString) {
PathSet context;
auto s = state->forceString(v, context, noPos, fmt("while evaluating the flake output attribute '%s'", attrPath));
auto storePath = state->store->maybeParseStorePath(s);
if (storePath && context.count(std::string(s))) {
return {{
.path = DerivedPath::Opaque {
.path = std::move(*storePath),
}
}};
} else
throw Error("flake output attribute '%s' evaluates to the string '%s' which is not a store path", attrPath, s);
}
else
throw Error("flake output attribute '%s' is not a derivation or path", attrPath);
}
auto drvPath = attr->forceDerivation();
std::optional<NixInt> priority;
if (attr->maybeGetAttr(state->sOutputSpecified)) {
} else if (auto aMeta = attr->maybeGetAttr(state->sMeta)) {
if (auto aPriority = aMeta->maybeGetAttr("priority"))
priority = aPriority->getInt();
}
return {{
.path = DerivedPath::Built {
.drvPath = std::move(drvPath),
.outputs = std::visit(overloaded {
[&](const ExtendedOutputsSpec::Default & d) -> OutputsSpec {
std::set<std::string> outputsToInstall;
if (auto aOutputSpecified = attr->maybeGetAttr(state->sOutputSpecified)) {
if (aOutputSpecified->getBool()) {
if (auto aOutputName = attr->maybeGetAttr("outputName"))
outputsToInstall = { aOutputName->getString() };
}
} else if (auto aMeta = attr->maybeGetAttr(state->sMeta)) {
if (auto aOutputsToInstall = aMeta->maybeGetAttr("outputsToInstall"))
for (auto & s : aOutputsToInstall->getListOfStrings())
outputsToInstall.insert(s);
}
if (outputsToInstall.empty())
outputsToInstall.insert("out");
return OutputsSpec::Names { std::move(outputsToInstall) };
},
[&](const ExtendedOutputsSpec::Explicit & e) -> OutputsSpec {
return e;
},
}, extendedOutputsSpec.raw()),
},
.info = {
.priority = priority,
.originalRef = flakeRef,
.resolvedRef = getLockedFlake()->flake.lockedRef,
.attrPath = attrPath,
.extendedOutputsSpec = extendedOutputsSpec,
}
}};
}
std::pair<Value *, PosIdx> InstallableFlake::toValue(EvalState & state)
{
return {&getCursor(state)->forceValue(), noPos};
}
std::vector<ref<eval_cache::AttrCursor>>
InstallableFlake::getCursors(EvalState & state)
{
auto evalCache = openEvalCache(state,
std::make_shared<flake::LockedFlake>(lockFlake(state, flakeRef, lockFlags)));
auto root = evalCache->getRoot();
std::vector<ref<eval_cache::AttrCursor>> res;
Suggestions suggestions;
auto attrPaths = getActualAttrPaths();
for (auto & attrPath : attrPaths) {
debug("trying flake output attribute '%s'", attrPath);
auto attr = root->findAlongAttrPath(parseAttrPath(state, attrPath));
if (attr) {
res.push_back(ref(*attr));
} else {
suggestions += attr.getSuggestions();
}
}
if (res.size() == 0)
throw Error(
suggestions,
"flake '%s' does not provide attribute %s",
flakeRef,
showAttrPaths(attrPaths));
return res;
}
std::shared_ptr<flake::LockedFlake> InstallableFlake::getLockedFlake() const
{
if (!_lockedFlake) {
flake::LockFlags lockFlagsApplyConfig = lockFlags;
lockFlagsApplyConfig.applyNixConfig = true;
_lockedFlake = std::make_shared<flake::LockedFlake>(lockFlake(*state, flakeRef, lockFlagsApplyConfig));
}
return _lockedFlake;
}
FlakeRef InstallableFlake::nixpkgsFlakeRef() const
{
auto lockedFlake = getLockedFlake();
if (auto nixpkgsInput = lockedFlake->lockFile.findInput({"nixpkgs"})) {
if (auto lockedNode = std::dynamic_pointer_cast<const flake::LockedNode>(nixpkgsInput)) {
debug("using nixpkgs flake '%s'", lockedNode->lockedRef);
return std::move(lockedNode->lockedRef);
}
}
return Installable::nixpkgsFlakeRef();
}
std::vector<std::shared_ptr<Installable>> SourceExprCommand::parseInstallables(
ref<Store> store, std::vector<std::string> ss)
{
std::vector<std::shared_ptr<Installable>> result;
if (readOnlyMode) {
settings.readOnlyMode = true;
}
if (file || expr) {
if (file && expr)
throw UsageError("'--file' and '--expr' are exclusive");
@ -777,9 +452,8 @@ std::vector<std::shared_ptr<Installable>> SourceExprCommand::parseInstallables(
auto [prefix, extendedOutputsSpec] = ExtendedOutputsSpec::parse(s);
result.push_back(
std::make_shared<InstallableAttrPath>(
state, *this, vFile,
prefix == "." ? "" : std::string { prefix },
extendedOutputsSpec));
InstallableAttrPath::parse(
state, *this, vFile, prefix, extendedOutputsSpec)));
}
} else {
@ -792,41 +466,10 @@ std::vector<std::shared_ptr<Installable>> SourceExprCommand::parseInstallables(
auto prefix = std::move(prefix_);
auto extendedOutputsSpec = std::move(extendedOutputsSpec_);
auto found = prefix.find('/');
if (found != std::string::npos) {
if (prefix.find('/') != std::string::npos) {
try {
auto derivedPath = std::visit(overloaded {
// If the user did not use ^, we treat the output more liberally.
[&](const ExtendedOutputsSpec::Default &) -> DerivedPath {
// First, we accept a symlink chain or an actual store path.
auto storePath = store->followLinksToStorePath(prefix);
// Second, we see if the store path ends in `.drv` to decide what sort
// of derived path they want.
//
// This handling predates the `^` syntax. The `^*` in
// `/nix/store/hash-foo.drv^*` unambiguously means "do the
// `DerivedPath::Built` case", so plain `/nix/store/hash-foo.drv` could
// also unambiguously mean "do the DerivedPath::Opaque` case".
//
// Issue #7261 tracks reconsidering this `.drv` dispatching.
return storePath.isDerivation()
? (DerivedPath) DerivedPath::Built {
.drvPath = std::move(storePath),
.outputs = OutputsSpec::All {},
}
: (DerivedPath) DerivedPath::Opaque {
.path = std::move(storePath),
};
},
// If the user did use ^, we just do exactly what is written.
[&](const ExtendedOutputsSpec::Explicit & outputSpec) -> DerivedPath {
return DerivedPath::Built {
.drvPath = store->parseStorePath(prefix),
.outputs = outputSpec,
};
},
}, extendedOutputsSpec.raw());
result.push_back(std::make_shared<InstallableStorePath>(store, std::move(derivedPath)));
result.push_back(std::make_shared<InstallableDerivedPath>(
InstallableDerivedPath::parse(store, prefix, extendedOutputsSpec)));
continue;
} catch (BadStorePath &) {
} catch (...) {
@ -1062,8 +705,8 @@ void InstallablesCommand::prepare()
installables = load();
}
Installables InstallablesCommand::load() {
Installables installables;
Installables InstallablesCommand::load()
{
if (_installables.empty() && useDefaultInstallables())
// FIXME: commands like "nix profile install" should not have a
// default, probably.
@ -1073,16 +716,13 @@ Installables InstallablesCommand::load() {
std::vector<std::string> InstallablesCommand::getFlakesForCompletion()
{
if (_installables.empty()) {
if (useDefaultInstallables())
return {"."};
return {};
}
if (_installables.empty() && useDefaultInstallables())
return {"."};
return _installables;
}
InstallableCommand::InstallableCommand(bool supportReadOnlyMode)
: SourceExprCommand(supportReadOnlyMode)
InstallableCommand::InstallableCommand()
: SourceExprCommand()
{
expectArgs({
.label = "installable",

View file

@ -161,54 +161,4 @@ struct Installable
typedef std::vector<std::shared_ptr<Installable>> Installables;
struct InstallableValue : Installable
{
ref<EvalState> state;
InstallableValue(ref<EvalState> state) : state(state) {}
};
struct InstallableFlake : InstallableValue
{
FlakeRef flakeRef;
Strings attrPaths;
Strings prefixes;
ExtendedOutputsSpec extendedOutputsSpec;
const flake::LockFlags & lockFlags;
mutable std::shared_ptr<flake::LockedFlake> _lockedFlake;
InstallableFlake(
SourceExprCommand * cmd,
ref<EvalState> state,
FlakeRef && flakeRef,
std::string_view fragment,
ExtendedOutputsSpec extendedOutputsSpec,
Strings attrPaths,
Strings prefixes,
const flake::LockFlags & lockFlags);
std::string what() const override { return flakeRef.to_string() + "#" + *attrPaths.begin(); }
std::vector<std::string> getActualAttrPaths();
Value * getFlakeOutputs(EvalState & state, const flake::LockedFlake & lockedFlake);
DerivedPathsWithInfo toDerivedPaths() override;
std::pair<Value *, PosIdx> toValue(EvalState & state) override;
/* Get a cursor to every attrpath in getActualAttrPaths()
that exists. However if none exists, throw an exception. */
std::vector<ref<eval_cache::AttrCursor>>
getCursors(EvalState & state) override;
std::shared_ptr<flake::LockedFlake> getLockedFlake() const;
FlakeRef nixpkgsFlakeRef() const override;
};
ref<eval_cache::EvalCache> openEvalCache(
EvalState & state,
std::shared_ptr<flake::LockedFlake> lockedFlake);
}

View file

@ -6,7 +6,7 @@ libcmd_DIR := $(d)
libcmd_SOURCES := $(wildcard $(d)/*.cc)
libcmd_CXXFLAGS += -I src/libutil -I src/libstore -I src/libexpr -I src/libmain -I src/libfetchers -I src/nix
libcmd_CXXFLAGS += -I src/libutil -I src/libstore -I src/libexpr -I src/libmain -I src/libfetchers
libcmd_LDFLAGS = $(EDITLINE_LIBS) $(LOWDOWN_LIBS) -pthread

View file

@ -6,4 +6,4 @@ Name: Nix
Description: Nix Package Manager
Version: @PACKAGE_VERSION@
Libs: -L${libdir} -lnixcmd
Cflags: -I${includedir}/nix -std=c++20
Cflags: -I${includedir}/nix -std=c++2a

View file

@ -19,6 +19,8 @@ extern "C" {
}
#endif
#include "repl.hh"
#include "ansicolor.hh"
#include "shared.hh"
#include "eval.hh"
@ -31,7 +33,9 @@ extern "C" {
#include "get-drvs.hh"
#include "derivations.hh"
#include "globals.hh"
#include "command.hh"
#include "flake/flake.hh"
#include "flake/lockfile.hh"
#include "editor-for.hh"
#include "finally.hh"
#include "markdown.hh"
#include "local-fs-store.hh"
@ -45,18 +49,16 @@ extern "C" {
namespace nix {
struct NixRepl
: AbstractNixRepl
#if HAVE_BOEHMGC
: gc
, gc
#endif
{
std::string curDir;
ref<EvalState> state;
Bindings * autoArgs;
size_t debugTraceIndex;
Strings loadedFiles;
typedef std::vector<std::pair<Value*,std::string>> AnnotatedValues;
std::function<AnnotatedValues()> getValues;
const static int envSize = 32768;
@ -69,8 +71,11 @@ struct NixRepl
NixRepl(const Strings & searchPath, nix::ref<Store> store,ref<EvalState> state,
std::function<AnnotatedValues()> getValues);
~NixRepl();
void mainLoop();
virtual ~NixRepl();
void mainLoop() override;
void initEnv() override;
StringSet completePrefix(const std::string & prefix);
bool getLine(std::string & input, const std::string & prompt);
StorePath getDerivationPath(Value & v);
@ -78,7 +83,6 @@ struct NixRepl
void loadFile(const Path & path);
void loadFlake(const std::string & flakeRef);
void initEnv();
void loadFiles();
void reloadFiles();
void addAttrsToScope(Value & attrs);
@ -92,7 +96,6 @@ struct NixRepl
std::ostream & printValue(std::ostream & str, Value & v, unsigned int maxDepth, ValuesSeen & seen);
};
std::string removeWhitespace(std::string s)
{
s = chomp(s);
@ -104,7 +107,7 @@ std::string removeWhitespace(std::string s)
NixRepl::NixRepl(const Strings & searchPath, nix::ref<Store> store, ref<EvalState> state,
std::function<NixRepl::AnnotatedValues()> getValues)
: state(state)
: AbstractNixRepl(state)
, debugTraceIndex(0)
, getValues(getValues)
, staticEnv(new StaticEnv(false, state->staticBaseEnv.get()))
@ -1029,8 +1032,22 @@ std::ostream & NixRepl::printValue(std::ostream & str, Value & v, unsigned int m
return str;
}
void runRepl(
ref<EvalState>evalState,
std::unique_ptr<AbstractNixRepl> AbstractNixRepl::create(
const Strings & searchPath, nix::ref<Store> store, ref<EvalState> state,
std::function<AnnotatedValues()> getValues)
{
return std::make_unique<NixRepl>(
searchPath,
openStore(),
state,
getValues
);
}
void AbstractNixRepl::runSimple(
ref<EvalState> evalState,
const ValMap & extraEnv)
{
auto getValues = [&]()->NixRepl::AnnotatedValues{
@ -1054,91 +1071,4 @@ void runRepl(
repl->mainLoop();
}
struct CmdRepl : InstallablesCommand
{
CmdRepl() {
evalSettings.pureEval = false;
}
void prepare() override
{
if (!settings.isExperimentalFeatureEnabled(Xp::ReplFlake) && !(file) && this->_installables.size() >= 1) {
warn("future versions of Nix will require using `--file` to load a file");
if (this->_installables.size() > 1)
warn("more than one input file is not currently supported");
auto filePath = this->_installables[0].data();
file = std::optional(filePath);
_installables.front() = _installables.back();
_installables.pop_back();
}
installables = InstallablesCommand::load();
}
std::vector<std::string> files;
Strings getDefaultFlakeAttrPaths() override
{
return {""};
}
bool useDefaultInstallables() override
{
return file.has_value() or expr.has_value();
}
bool forceImpureByDefault() override
{
return true;
}
std::string description() override
{
return "start an interactive environment for evaluating Nix expressions";
}
std::string doc() override
{
return
#include "repl.md"
;
}
void run(ref<Store> store) override
{
auto state = getEvalState();
auto getValues = [&]()->NixRepl::AnnotatedValues{
auto installables = load();
NixRepl::AnnotatedValues values;
for (auto & installable: installables){
auto what = installable->what();
if (file){
auto [val, pos] = installable->toValue(*state);
auto what = installable->what();
state->forceValue(*val, pos);
auto autoArgs = getAutoArgs(*state);
auto valPost = state->allocValue();
state->autoCallFunction(*autoArgs, *val, *valPost);
state->forceValue(*valPost, pos);
values.push_back( {valPost, what });
} else {
auto [val, pos] = installable->toValue(*state);
values.push_back( {val, what} );
}
}
return values;
};
auto repl = std::make_unique<NixRepl>(
searchPath,
openStore(),
state,
getValues
);
repl->autoArgs = getAutoArgs(*repl->state);
repl->initEnv();
repl->mainLoop();
}
};
static auto rCmdRepl = registerCommand<CmdRepl>("repl");
}

39
src/libcmd/repl.hh Normal file
View file

@ -0,0 +1,39 @@
#pragma once
#include "eval.hh"
#if HAVE_BOEHMGC
#define GC_INCLUDE_NEW
#include <gc/gc_cpp.h>
#endif
namespace nix {
struct AbstractNixRepl
{
ref<EvalState> state;
Bindings * autoArgs;
AbstractNixRepl(ref<EvalState> state)
: state(state)
{ }
virtual ~AbstractNixRepl()
{ }
typedef std::vector<std::pair<Value*,std::string>> AnnotatedValues;
static std::unique_ptr<AbstractNixRepl> create(
const Strings & searchPath, nix::ref<Store> store, ref<EvalState> state,
std::function<AnnotatedValues()> getValues);
static void runSimple(
ref<EvalState> evalState,
const ValMap & extraEnv);
virtual void initEnv() = 0;
virtual void mainLoop() = 0;
};
}

View file

@ -519,7 +519,6 @@ EvalState::EvalState(
static_assert(sizeof(Env) <= 16, "environment must be <= 16 bytes");
/* Initialise the Nix expression search path. */
evalSettings.nixPath.setDefault(evalSettings.getDefaultNixPath());
if (!evalSettings.pureEval) {
for (auto & i : _searchPath) addToSearchPath(i);
for (auto & i : evalSettings.nixPath.get()) addToSearchPath(i);
@ -2473,35 +2472,30 @@ std::ostream & operator << (std::ostream & str, const ExternalValueBase & v) {
EvalSettings::EvalSettings()
{
auto var = getEnv("NIX_PATH");
if (var) nixPath = parseNixPath(*var);
}
/* impure => NIX_PATH or a default path
* restrict-eval => NIX_PATH
* pure-eval => empty
*/
Strings EvalSettings::getDefaultNixPath()
{
if (pureEval)
return {};
Strings res;
auto add = [&](const Path & p, const std::string & s = std::string()) {
if (pathExists(p)) {
if (s.empty()) {
res.push_back(p);
} else {
res.push_back(s + "=" + p);
}
}
};
auto var = getEnv("NIX_PATH");
if (var) {
return parseNixPath(*var);
} else if (restrictEval) {
return {};
} else {
Strings res;
auto add = [&](const Path & p, const std::optional<std::string> & s = std::nullopt) {
if (pathExists(p))
res.push_back(s ? *s + "=" + p : p);
};
add(getHome() + "/.nix-defexpr/channels");
if (!evalSettings.restrictEval && !evalSettings.pureEval) {
add(settings.useXDGBaseDirectories ? getStateDir() + "/nix/defexpr/channels" : getHome() + "/.nix-defexpr/channels");
add(settings.nixStateDir + "/profiles/per-user/root/channels/nixpkgs", "nixpkgs");
add(settings.nixStateDir + "/profiles/per-user/root/channels");
return res;
}
return res;
}
bool EvalSettings::isPseudoUrl(std::string_view s)

View file

@ -570,7 +570,7 @@ struct EvalSettings : Config
{
EvalSettings();
Strings getDefaultNixPath();
static Strings getDefaultNixPath();
static bool isPseudoUrl(std::string_view s);
@ -580,15 +580,8 @@ struct EvalSettings : Config
"Whether builtin functions that allow executing native code should be enabled."};
Setting<Strings> nixPath{
this, {}, "nix-path",
R"(
List of directories to be searched for `<...>` file references.
If [pure evaluation](#conf-pure-eval) is disabled,
this is initialised using the [`NIX_PATH`](@docroot@/command-ref/env-common.md#env-NIX_PATH)
environment variable, or, if it is unset and [restricted evaluation](#conf-restrict-eval)
is disabled, a default search path including the user's and `root`'s channels.
)"};
this, getDefaultNixPath(), "nix-path",
"List of directories to be searched for `<...>` file references."};
Setting<bool> restrictEval{
this, false, "restrict-eval",

View file

@ -16,7 +16,9 @@ let
subdir = if key == lockFile.root then rootSubdir else node.locked.dir or "";
flake = import (sourceInfo + (if subdir != "" then "/" else "") + subdir + "/flake.nix");
outPath = sourceInfo + ((if subdir == "" then "" else "/") + subdir);
flake = import (outPath + "/flake.nix");
inputs = builtins.mapAttrs
(inputName: inputSpec: allNodes.${resolveInput inputSpec})
@ -43,7 +45,21 @@ let
outputs = flake.outputs (inputs // { self = result; });
result = outputs // sourceInfo // { inherit inputs; inherit outputs; inherit sourceInfo; _type = "flake"; };
result =
outputs
# We add the sourceInfo attribute for its metadata, as they are
# relevant metadata for the flake. However, the outPath of the
# sourceInfo does not necessarily match the outPath of the flake,
# as the flake may be in a subdirectory of a source.
# This is shadowed in the next //
// sourceInfo
// {
# This shadows the sourceInfo.outPath
inherit outPath;
inherit inputs; inherit outputs; inherit sourceInfo; _type = "flake";
};
in
if node.flake or true then
assert builtins.isFunction flake.outputs;

View file

@ -7,4 +7,4 @@ Description: Nix Package Manager
Version: @PACKAGE_VERSION@
Requires: nix-store bdw-gc
Libs: -L${libdir} -lnixexpr
Cflags: -I${includedir}/nix -std=c++20
Cflags: -I${includedir}/nix -std=c++2a

View file

@ -186,7 +186,7 @@ struct ExprString : Expr
{
std::string s;
Value v;
ExprString(std::string s) : s(std::move(s)) { v.mkString(this->s.data()); };
ExprString(std::string &&s) : s(std::move(s)) { v.mkString(this->s.data()); };
Value * maybeThunk(EvalState & state, Env & env) override;
COMMON_METHODS
};
@ -233,7 +233,7 @@ struct ExprSelect : Expr
PosIdx pos;
Expr * e, * def;
AttrPath attrPath;
ExprSelect(const PosIdx & pos, Expr * e, const AttrPath & attrPath, Expr * def) : pos(pos), e(e), def(def), attrPath(attrPath) { };
ExprSelect(const PosIdx & pos, Expr * e, const AttrPath && attrPath, Expr * def) : pos(pos), e(e), def(def), attrPath(std::move(attrPath)) { };
ExprSelect(const PosIdx & pos, Expr * e, Symbol name) : pos(pos), e(e), def(0) { attrPath.push_back(AttrName(name)); };
PosIdx getPos() const override { return pos; }
COMMON_METHODS
@ -243,7 +243,7 @@ struct ExprOpHasAttr : Expr
{
Expr * e;
AttrPath attrPath;
ExprOpHasAttr(Expr * e, const AttrPath & attrPath) : e(e), attrPath(attrPath) { };
ExprOpHasAttr(Expr * e, const AttrPath && attrPath) : e(e), attrPath(std::move(attrPath)) { };
PosIdx getPos() const override { return e->getPos(); }
COMMON_METHODS
};

View file

@ -90,7 +90,7 @@ static void dupAttr(const EvalState & state, Symbol attr, const PosIdx pos, cons
}
static void addAttr(ExprAttrs * attrs, AttrPath & attrPath,
static void addAttr(ExprAttrs * attrs, AttrPath && attrPath,
Expr * e, const PosIdx pos, const nix::EvalState & state)
{
AttrPath::iterator i;
@ -188,7 +188,7 @@ static Formals * toFormals(ParseData & data, ParserFormals * formals,
static Expr * stripIndentation(const PosIdx pos, SymbolTable & symbols,
std::vector<std::pair<PosIdx, std::variant<Expr *, StringToken>>> & es)
std::vector<std::pair<PosIdx, std::variant<Expr *, StringToken>>> && es)
{
if (es.empty()) return new ExprString("");
@ -268,7 +268,7 @@ static Expr * stripIndentation(const PosIdx pos, SymbolTable & symbols,
s2 = std::string(s2, 0, p + 1);
}
es2->emplace_back(i->first, new ExprString(s2));
es2->emplace_back(i->first, new ExprString(std::move(s2)));
};
for (; i != es.end(); ++i, --n) {
std::visit(overloaded { trimExpr, trimString }, i->second);
@ -408,7 +408,7 @@ expr_op
| expr_op OR expr_op { $$ = new ExprOpOr(makeCurPos(@2, data), $1, $3); }
| expr_op IMPL expr_op { $$ = new ExprOpImpl(makeCurPos(@2, data), $1, $3); }
| expr_op UPDATE expr_op { $$ = new ExprOpUpdate(makeCurPos(@2, data), $1, $3); }
| expr_op '?' attrpath { $$ = new ExprOpHasAttr($1, *$3); }
| expr_op '?' attrpath { $$ = new ExprOpHasAttr($1, std::move(*$3)); delete $3; }
| expr_op '+' expr_op
{ $$ = new ExprConcatStrings(makeCurPos(@2, data), false, new std::vector<std::pair<PosIdx, Expr *> >({{makeCurPos(@1, data), $1}, {makeCurPos(@3, data), $3}})); }
| expr_op '-' expr_op { $$ = new ExprCall(makeCurPos(@2, data), new ExprVar(data->symbols.create("__sub")), {$1, $3}); }
@ -431,14 +431,14 @@ expr_app
expr_select
: expr_simple '.' attrpath
{ $$ = new ExprSelect(CUR_POS, $1, *$3, 0); }
{ $$ = new ExprSelect(CUR_POS, $1, std::move(*$3), nullptr); delete $3; }
| expr_simple '.' attrpath OR_KW expr_select
{ $$ = new ExprSelect(CUR_POS, $1, *$3, $5); }
{ $$ = new ExprSelect(CUR_POS, $1, std::move(*$3), $5); delete $3; }
| /* Backwards compatibility: because Nixpkgs has a rarely used
function named or, allow stuff like map or [...]. */
expr_simple OR_KW
{ $$ = new ExprCall(CUR_POS, $1, {new ExprVar(CUR_POS, data->symbols.create("or"))}); }
| expr_simple { $$ = $1; }
| expr_simple
;
expr_simple
@ -453,9 +453,10 @@ expr_simple
| FLOAT { $$ = new ExprFloat($1); }
| '"' string_parts '"' { $$ = $2; }
| IND_STRING_OPEN ind_string_parts IND_STRING_CLOSE {
$$ = stripIndentation(CUR_POS, data->symbols, *$2);
$$ = stripIndentation(CUR_POS, data->symbols, std::move(*$2));
delete $2;
}
| path_start PATH_END { $$ = $1; }
| path_start PATH_END
| path_start string_parts_interpolated PATH_END {
$2->insert($2->begin(), {makeCurPos(@1, data), $1});
$$ = new ExprConcatStrings(CUR_POS, false, $2);
@ -465,7 +466,7 @@ expr_simple
$$ = new ExprCall(CUR_POS,
new ExprVar(data->symbols.create("__findFile")),
{new ExprVar(data->symbols.create("__nixPath")),
new ExprString(path)});
new ExprString(std::move(path))});
}
| URI {
static bool noURLLiterals = settings.isExperimentalFeatureEnabled(Xp::NoUrlLiterals);
@ -533,7 +534,7 @@ ind_string_parts
;
binds
: binds attrpath '=' expr ';' { $$ = $1; addAttr($$, *$2, $4, makeCurPos(@2, data), data->state); }
: binds attrpath '=' expr ';' { $$ = $1; addAttr($$, std::move(*$2), $4, makeCurPos(@2, data), data->state); delete $2; }
| binds INHERIT attrs ';'
{ $$ = $1;
for (auto & i : *$3) {
@ -542,6 +543,7 @@ binds
auto pos = makeCurPos(@3, data);
$$->attrs.emplace(i.symbol, ExprAttrs::AttrDef(new ExprVar(CUR_POS, i.symbol), pos, true));
}
delete $3;
}
| binds INHERIT '(' expr ')' attrs ';'
{ $$ = $1;
@ -551,6 +553,7 @@ binds
dupAttr(data->state, i.symbol, makeCurPos(@6, data), $$->attrs[i.symbol].pos);
$$->attrs.emplace(i.symbol, ExprAttrs::AttrDef(new ExprSelect(CUR_POS, $4, i.symbol), makeCurPos(@6, data)));
}
delete $6;
}
| { $$ = new ExprAttrs(makeCurPos(@0, data)); }
;
@ -596,7 +599,7 @@ attrpath
;
attr
: ID { $$ = $1; }
: ID
| OR_KW { $$ = {"or", 2}; }
;
@ -612,9 +615,9 @@ expr_list
formals
: formal ',' formals
{ $$ = $3; $$->formals.push_back(*$1); }
{ $$ = $3; $$->formals.emplace_back(*$1); delete $1; }
| formal
{ $$ = new ParserFormals; $$->formals.push_back(*$1); $$->ellipsis = false; }
{ $$ = new ParserFormals; $$->formals.emplace_back(*$1); $$->ellipsis = false; delete $1; }
|
{ $$ = new ParserFormals; $$->ellipsis = false; }
| ELLIPSIS

View file

@ -3044,9 +3044,9 @@ static RegisterPrimOp primop_foldlStrict({
.doc = R"(
Reduce a list by applying a binary operator, from left to right,
e.g. `foldl' op nul [x0 x1 x2 ...] = op (op (op nul x0) x1) x2)
...`. The operator is applied strictly, i.e., its arguments are
evaluated first. For example, `foldl' (x: y: x + y) 0 [1 2 3]`
evaluates to 6.
...`. For example, `foldl' (x: y: x + y) 0 [1 2 3]` evaluates to 6.
The return value of each application of `op` is evaluated immediately,
even for intermediate values.
)",
.fun = prim_foldlStrict,
});

View file

@ -4,6 +4,7 @@
#include "fetchers.hh"
#include "filetransfer.hh"
#include "registry.hh"
#include "url.hh"
#include <ctime>
#include <iomanip>
@ -68,7 +69,16 @@ void emitTreeAttrs(
std::string fixURI(std::string uri, EvalState & state, const std::string & defaultScheme = "file")
{
state.checkURI(uri);
return uri.find("://") != std::string::npos ? uri : defaultScheme + "://" + uri;
if (uri.find("://") == std::string::npos) {
const auto p = ParsedURL {
.scheme = defaultScheme,
.authority = "",
.path = uri
};
return p.to_string();
} else {
return uri;
}
}
std::string fixURIForGit(std::string uri, EvalState & state)
@ -461,6 +471,17 @@ static RegisterPrimOp primop_fetchGit({
> **Note**
>
> This behavior is disabled in *Pure evaluation mode*.
- To fetch the content of a checked-out work directory:
```nix
builtins.fetchGit ./work-dir
```
If the URL points to a local directory, and no `ref` or `rev` is
given, `fetchGit` will use the current content of the checked-out
files, even if they are not committed or added to Git's index. It will
only consider files added to the Git repository, as listed by `git ls-files`.
)",
.fun = prim_fetchGit,
});

View file

@ -57,7 +57,7 @@ struct FetchSettings : public Config
```
This example specifies three tokens, one each for accessing
github.com, gitlab.mycompany.com, and sourceforge.net.
github.com, gitlab.mycompany.com, and gitlab.com.
The `input.foo` uses the "gitlab" fetcher, which might
requires specifying the token type along with the token

View file

@ -615,15 +615,42 @@ struct GitInputScheme : InputScheme
AutoDelete delTmpGitDir(tmpGitDir, true);
runProgram("git", true, { "-c", "init.defaultBranch=" + gitInitialBranch, "init", tmpDir, "--separate-git-dir", tmpGitDir });
// TODO: repoDir might lack the ref (it only checks if rev
// exists, see FIXME above) so use a big hammer and fetch
// everything to ensure we get the rev.
runProgram("git", true, { "-C", tmpDir, "fetch", "--quiet", "--force",
"--update-head-ok", "--", repoDir, "refs/*:refs/*" });
{
// TODO: repoDir might lack the ref (it only checks if rev
// exists, see FIXME above) so use a big hammer and fetch
// everything to ensure we get the rev.
Activity act(*logger, lvlTalkative, actUnknown, fmt("making temporary clone of '%s'", repoDir));
runProgram("git", true, { "-C", tmpDir, "fetch", "--quiet", "--force",
"--update-head-ok", "--", repoDir, "refs/*:refs/*" });
}
runProgram("git", true, { "-C", tmpDir, "checkout", "--quiet", input.getRev()->gitRev() });
runProgram("git", true, { "-C", tmpDir, "remote", "add", "origin", actualUrl });
runProgram("git", true, { "-C", tmpDir, "submodule", "--quiet", "update", "--init", "--recursive" });
/* Ensure that we use the correct origin for fetching
submodules. This matters for submodules with relative
URLs. */
if (isLocal) {
writeFile(tmpGitDir + "/config", readFile(repoDir + "/" + gitDir + "/config"));
/* Restore the config.bare setting we may have just
copied erroneously from the user's repo. */
runProgram("git", true, { "-C", tmpDir, "config", "core.bare", "false" });
} else
runProgram("git", true, { "-C", tmpDir, "config", "remote.origin.url", actualUrl });
/* As an optimisation, copy the modules directory of the
source repo if it exists. */
auto modulesPath = repoDir + "/" + gitDir + "/modules";
if (pathExists(modulesPath)) {
Activity act(*logger, lvlTalkative, actUnknown, fmt("copying submodules of '%s'", actualUrl));
runProgram("cp", true, { "-R", "--", modulesPath, tmpGitDir + "/modules" });
}
{
Activity act(*logger, lvlTalkative, actUnknown, fmt("fetching submodules of '%s'", actualUrl));
runProgram("git", true, { "-C", tmpDir, "submodule", "--quiet", "update", "--init", "--recursive" });
}
filter = isNotDotGitDirectory;
} else {

View file

@ -6,4 +6,4 @@ Name: Nix
Description: Nix Package Manager
Version: @PACKAGE_VERSION@
Libs: -L${libdir} -lnixmain
Cflags: -I${includedir}/nix -std=c++20
Cflags: -I${includedir}/nix -std=c++2a

View file

@ -16,6 +16,7 @@
#include "json-utils.hh"
#include "cgroup.hh"
#include "personality.hh"
#include "namespaces.hh"
#include <regex>
#include <queue>
@ -167,7 +168,8 @@ void LocalDerivationGoal::killSandbox(bool getStats)
}
void LocalDerivationGoal::tryLocalBuild() {
void LocalDerivationGoal::tryLocalBuild()
{
unsigned int curBuilds = worker.getNrLocalBuilds();
if (curBuilds >= settings.maxBuildJobs) {
state = &DerivationGoal::tryToBuild;
@ -205,6 +207,17 @@ void LocalDerivationGoal::tryLocalBuild() {
#endif
}
#if __linux__
if (useChroot) {
if (!mountAndPidNamespacesSupported()) {
if (!settings.sandboxFallback)
throw Error("this system does not support the kernel namespaces that are required for sandboxing; use '--no-sandbox' to disable sandboxing");
debug("auto-disabling sandboxing because the prerequisite namespaces are not available");
useChroot = false;
}
}
#endif
if (useBuildUsers()) {
if (!buildUser)
buildUser = acquireUserLock(parsedDrv->useUidRange() ? 65536 : 1, useChroot);
@ -372,12 +385,6 @@ void LocalDerivationGoal::cleanupPostOutputsRegisteredModeNonCheck()
}
int childEntry(void * arg)
{
((LocalDerivationGoal *) arg)->runChild();
return 1;
}
#if __linux__
static void linkOrCopy(const Path & from, const Path & to)
{
@ -663,7 +670,8 @@ void LocalDerivationGoal::startBuilder()
nobody account. The latter is kind of a hack to support
Samba-in-QEMU. */
createDirs(chrootRootDir + "/etc");
chownToBuilder(chrootRootDir + "/etc");
if (parsedDrv->useUidRange())
chownToBuilder(chrootRootDir + "/etc");
if (parsedDrv->useUidRange() && (!buildUser || buildUser->getUIDCount() < 65536))
throw Error("feature 'uid-range' requires the setting '%s' to be enabled", settings.autoAllocateUids.name);
@ -888,12 +896,7 @@ void LocalDerivationGoal::startBuilder()
userNamespaceSync.create();
Path maxUserNamespaces = "/proc/sys/user/max_user_namespaces";
static bool userNamespacesEnabled =
pathExists(maxUserNamespaces)
&& trim(readFile(maxUserNamespaces)) != "0";
usingUserNamespace = userNamespacesEnabled;
usingUserNamespace = userNamespacesSupported();
Pid helper = startProcess([&]() {
@ -908,76 +911,21 @@ void LocalDerivationGoal::startBuilder()
if (getuid() == 0 && setgroups(0, 0) == -1)
throw SysError("setgroups failed");
size_t stackSize = 1 * 1024 * 1024;
char * stack = (char *) mmap(0, stackSize,
PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0);
if (stack == MAP_FAILED) throw SysError("allocating stack");
int flags = CLONE_NEWPID | CLONE_NEWNS | CLONE_NEWIPC | CLONE_NEWUTS | CLONE_PARENT | SIGCHLD;
ProcessOptions options;
options.cloneFlags = CLONE_NEWPID | CLONE_NEWNS | CLONE_NEWIPC | CLONE_NEWUTS | CLONE_PARENT | SIGCHLD;
if (privateNetwork)
flags |= CLONE_NEWNET;
options.cloneFlags |= CLONE_NEWNET;
if (usingUserNamespace)
flags |= CLONE_NEWUSER;
options.cloneFlags |= CLONE_NEWUSER;
pid_t child = startProcess([&]() { runChild(); }, options);
pid_t child = clone(childEntry, stack + stackSize, flags, this);
if (child == -1 && errno == EINVAL) {
/* Fallback for Linux < 2.13 where CLONE_NEWPID and
CLONE_PARENT are not allowed together. */
flags &= ~CLONE_NEWPID;
child = clone(childEntry, stack + stackSize, flags, this);
}
if (usingUserNamespace && child == -1 && (errno == EPERM || errno == EINVAL)) {
/* Some distros patch Linux to not allow unprivileged
* user namespaces. If we get EPERM or EINVAL, try
* without CLONE_NEWUSER and see if that works.
* Details: https://salsa.debian.org/kernel-team/linux/-/commit/d98e00eda6bea437e39b9e80444eee84a32438a6
*/
usingUserNamespace = false;
flags &= ~CLONE_NEWUSER;
child = clone(childEntry, stack + stackSize, flags, this);
}
if (child == -1) {
switch(errno) {
case EPERM:
case EINVAL: {
int errno_ = errno;
if (!userNamespacesEnabled && errno==EPERM)
notice("user namespaces appear to be disabled; they are required for sandboxing; check /proc/sys/user/max_user_namespaces");
if (userNamespacesEnabled) {
Path procSysKernelUnprivilegedUsernsClone = "/proc/sys/kernel/unprivileged_userns_clone";
if (pathExists(procSysKernelUnprivilegedUsernsClone)
&& trim(readFile(procSysKernelUnprivilegedUsernsClone)) == "0") {
notice("user namespaces appear to be disabled; they are required for sandboxing; check /proc/sys/kernel/unprivileged_userns_clone");
}
}
Path procSelfNsUser = "/proc/self/ns/user";
if (!pathExists(procSelfNsUser))
notice("/proc/self/ns/user does not exist; your kernel was likely built without CONFIG_USER_NS=y, which is required for sandboxing");
/* Otherwise exit with EPERM so we can handle this in the
parent. This is only done when sandbox-fallback is set
to true (the default). */
if (settings.sandboxFallback)
_exit(1);
/* Mention sandbox-fallback in the error message so the user
knows that having it disabled contributed to the
unrecoverability of this failure */
throw SysError(errno_, "creating sandboxed builder process using clone(), without sandbox-fallback");
}
default:
throw SysError("creating sandboxed builder process using clone()");
}
}
writeFull(builderOut.writeSide.get(),
fmt("%d %d\n", usingUserNamespace, child));
_exit(0);
});
int res = helper.wait();
if (res != 0 && settings.sandboxFallback) {
useChroot = false;
initTmpDir();
goto fallback;
} else if (res != 0)
if (helper.wait() != 0)
throw Error("unable to start build process");
userNamespaceSync.readSide = -1;
@ -1045,9 +993,6 @@ void LocalDerivationGoal::startBuilder()
} else
#endif
{
#if __linux__
fallback:
#endif
pid = startProcess([&]() {
runChild();
});
@ -1516,8 +1461,7 @@ void LocalDerivationGoal::startDaemon()
FdSink to(remote.get());
try {
daemon::processConnection(store, from, to,
daemon::NotTrusted, daemon::Recursive,
[&](Store & store) {});
daemon::NotTrusted, daemon::Recursive);
debug("terminated daemon connection");
} catch (SysError &) {
ignoreException();
@ -1907,6 +1851,10 @@ void LocalDerivationGoal::runChild()
}
}
/* Make /etc unwritable */
if (!parsedDrv->useUidRange())
chmod_(chrootRootDir + "/etc", 0555);
/* Unshare this mount namespace. This is necessary because
pivot_root() below changes the root of the mount
namespace. This means that the call to setns() in

View file

@ -236,6 +236,10 @@ struct ClientSettings
// the daemon, as that could cause some pretty weird stuff
if (parseFeatures(tokenizeString<StringSet>(value)) != settings.experimentalFeatures.get())
debug("Ignoring the client-specified experimental features");
} else if (name == settings.pluginFiles.name) {
if (tokenizeString<Paths>(value) != settings.pluginFiles.get())
warn("Ignoring the client-specified plugin-files.\n"
"The client specifying plugins to the daemon never made sense, and was removed in Nix >=2.14.");
}
else if (trusted
|| name == settings.buildTimeout.name
@ -525,7 +529,14 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
mode = (BuildMode) readInt(from);
/* Repairing is not atomic, so disallowed for "untrusted"
clients. */
clients.
FIXME: layer violation in this message: the daemon code (i.e.
this file) knows whether a client/connection is trusted, but it
does not how how the client was authenticated. The mechanism
need not be getting the UID of the other end of a Unix Domain
Socket.
*/
if (mode == bmRepair && !trusted)
throw Error("repairing is not allowed because you are not in 'trusted-users'");
}
@ -542,7 +553,9 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
mode = (BuildMode) readInt(from);
/* Repairing is not atomic, so disallowed for "untrusted"
clients. */
clients.
FIXME: layer violation; see above. */
if (mode == bmRepair && !trusted)
throw Error("repairing is not allowed because you are not in 'trusted-users'");
@ -981,8 +994,7 @@ void processConnection(
FdSource & from,
FdSink & to,
TrustedFlag trusted,
RecursiveFlag recursive,
std::function<void(Store &)> authHook)
RecursiveFlag recursive)
{
auto monitor = !recursive ? std::make_unique<MonitorFdHup>(from.fd) : nullptr;
@ -1025,10 +1037,6 @@ void processConnection(
try {
/* If we can't accept clientVersion, then throw an error
*here* (not above). */
authHook(*store);
tunnelLogger->stopWork();
to.flush();

View file

@ -13,11 +13,6 @@ void processConnection(
FdSource & from,
FdSink & to,
TrustedFlag trusted,
RecursiveFlag recursive,
/* Arbitrary hook to check authorization / initialize user data / whatever
after the protocol has been negotiated. The idea is that this function
and everything it calls doesn't know about this stuff, and the
`nix-daemon` handles that instead. */
std::function<void(Store &)> authHook);
RecursiveFlag recursive);
}

View file

@ -5,6 +5,7 @@
#include "worker-protocol.hh"
#include "fs-accessor.hh"
#include <boost/container/small_vector.hpp>
#include <nlohmann/json.hpp>
namespace nix {
@ -890,4 +891,63 @@ std::optional<BasicDerivation> Derivation::tryResolve(
const Hash impureOutputHash = hashString(htSHA256, "impure");
nlohmann::json DerivationOutput::toJSON(
const Store & store, std::string_view drvName, std::string_view outputName) const
{
nlohmann::json res = nlohmann::json::object();
std::visit(overloaded {
[&](const DerivationOutput::InputAddressed & doi) {
res["path"] = store.printStorePath(doi.path);
},
[&](const DerivationOutput::CAFixed & dof) {
res["path"] = store.printStorePath(dof.path(store, drvName, outputName));
res["hashAlgo"] = dof.hash.printMethodAlgo();
res["hash"] = dof.hash.hash.to_string(Base16, false);
},
[&](const DerivationOutput::CAFloating & dof) {
res["hashAlgo"] = makeFileIngestionPrefix(dof.method) + printHashType(dof.hashType);
},
[&](const DerivationOutput::Deferred &) {},
[&](const DerivationOutput::Impure & doi) {
res["hashAlgo"] = makeFileIngestionPrefix(doi.method) + printHashType(doi.hashType);
res["impure"] = true;
},
}, raw());
return res;
}
nlohmann::json Derivation::toJSON(const Store & store) const
{
nlohmann::json res = nlohmann::json::object();
{
nlohmann::json & outputsObj = res["outputs"];
outputsObj = nlohmann::json::object();
for (auto & [outputName, output] : outputs) {
outputsObj[outputName] = output.toJSON(store, name, outputName);
}
}
{
auto& inputsList = res["inputSrcs"];
inputsList = nlohmann::json ::array();
for (auto & input : inputSrcs)
inputsList.emplace_back(store.printStorePath(input));
}
{
auto& inputDrvsObj = res["inputDrvs"];
inputDrvsObj = nlohmann::json ::object();
for (auto & input : inputDrvs)
inputDrvsObj[store.printStorePath(input.first)] = input.second;
}
res["system"] = platform;
res["builder"] = builder;
res["args"] = args;
res["env"] = env;
return res;
}
}

View file

@ -83,6 +83,11 @@ struct DerivationOutput : _DerivationOutputRaw
inline const Raw & raw() const {
return static_cast<const Raw &>(*this);
}
nlohmann::json toJSON(
const Store & store,
std::string_view drvName,
std::string_view outputName) const;
};
typedef std::map<std::string, DerivationOutput> DerivationOutputs;
@ -210,6 +215,8 @@ struct Derivation : BasicDerivation
Derivation() = default;
Derivation(const BasicDerivation & bd) : BasicDerivation(bd) { }
Derivation(BasicDerivation && bd) : BasicDerivation(std::move(bd)) { }
nlohmann::json toJSON(const Store & store) const;
};

View file

@ -101,6 +101,7 @@ struct curlFileTransfer : public FileTransfer
this->result.data.append(data);
})
{
requestHeaders = curl_slist_append(requestHeaders, "Accept-Encoding: zstd, br, gzip, deflate, bzip2, xz");
if (!request.expectedETag.empty())
requestHeaders = curl_slist_append(requestHeaders, ("If-None-Match: " + request.expectedETag).c_str());
if (!request.mimeType.empty())
@ -828,7 +829,7 @@ void FileTransfer::download(FileTransferRequest && request, Sink & sink)
{
auto state(_state->lock());
while (state->data.empty()) {
if (state->data.empty()) {
if (state->quit) {
if (state->exc) std::rethrow_exception(state->exc);
@ -836,6 +837,8 @@ void FileTransfer::download(FileTransferRequest && request, Sink & sink)
}
state.wait(state->avail);
if (state->data.empty()) continue;
}
chunk = std::move(state->data);

View file

@ -201,7 +201,16 @@ public:
{"build-timeout"}};
PathSetting buildHook{this, true, "", "build-hook",
"The path of the helper program that executes builds to remote machines."};
R"(
The path to the helper program that executes remote builds.
Nix communicates with the build hook over `stdio` using a custom protocol to request builds that cannot be performed directly by the Nix daemon.
The default value is the internal Nix binary that implements remote building.
> **Important**
>
> Change this setting only if you really know what youre doing.
)"};
Setting<std::string> builders{
this, "@" + nixConfDir + "/machines", "builders",
@ -279,8 +288,8 @@ public:
If the build users group is empty, builds will be performed under
the uid of the Nix process (that is, the uid of the caller if
`NIX_REMOTE` is empty, the uid under which the Nix daemon runs if
`NIX_REMOTE` is `daemon`). Obviously, this should not be used in
multi-user settings with untrusted users.
`NIX_REMOTE` is `daemon`). Obviously, this should not be used
with a nix daemon accessible to untrusted clients.
Defaults to `nixbld` when running as root, *empty* otherwise.
)",
@ -696,24 +705,6 @@ public:
)",
{"trusted-binary-caches"}};
Setting<Strings> trustedUsers{
this, {"root"}, "trusted-users",
R"(
A list of names of users (separated by whitespace) that have
additional rights when connecting to the Nix daemon, such as the
ability to specify additional binary caches, or to import unsigned
NARs. You can also specify groups by prefixing them with `@`; for
instance, `@wheel` means all users in the `wheel` group. The default
is `root`.
> **Warning**
>
> Adding a user to `trusted-users` is essentially equivalent to
> giving that user root access to the system. For example, the user
> can set `sandbox-paths` and thereby obtain read access to
> directories that are otherwise inacessible to them.
)"};
Setting<unsigned int> ttlNegativeNarInfoCache{
this, 3600, "narinfo-cache-negative-ttl",
R"(
@ -736,18 +727,6 @@ public:
mismatch if the build isn't reproducible.
)"};
/* ?Who we trust to use the daemon in safe ways */
Setting<Strings> allowedUsers{
this, {"*"}, "allowed-users",
R"(
A list of names of users (separated by whitespace) that are allowed
to connect to the Nix daemon. As with the `trusted-users` option,
you can specify groups by prefixing them with `@`. Also, you can
allow all users by specifying `*`. The default is `*`.
Note that trusted users are always allowed to connect.
)"};
Setting<bool> printMissing{this, true, "print-missing",
"Whether to print what paths need to be built or downloaded."};
@ -975,6 +954,27 @@ public:
resolves to a different location from that of the build machine. You
can enable this setting if you are sure you're not going to do that.
)"};
Setting<bool> useXDGBaseDirectories{
this, false, "use-xdg-base-directories",
R"(
If set to `true`, Nix will conform to the [XDG Base Directory Specification] for files in `$HOME`.
The environment variables used to implement this are documented in the [Environment Variables section](@docroot@/installation/env-variables.md).
[XDG Base Directory Specification]: https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
> **Warning**
> This changes the location of some well-known symlinks that Nix creates, which might break tools that rely on the old, non-XDG-conformant locations.
In particular, the following locations change:
| Old | New |
|-------------------|--------------------------------|
| `~/.nix-profile` | `$XDG_STATE_HOME/nix/profile` |
| `~/.nix-defexpr` | `$XDG_STATE_HOME/nix/defexpr` |
| `~/.nix-channels` | `$XDG_STATE_HOME/nix/channels` |
)"
};
};

View file

@ -56,7 +56,7 @@ public:
void init() override
{
// FIXME: do this lazily?
if (auto cacheInfo = diskCache->cacheExists(cacheUri)) {
if (auto cacheInfo = diskCache->upToDateCacheExists(cacheUri)) {
wantMassQuery.setDefault(cacheInfo->wantMassQuery);
priority.setDefault(cacheInfo->priority);
} else {

View file

@ -84,11 +84,10 @@ public:
Sync<State> _state;
NarInfoDiskCacheImpl()
NarInfoDiskCacheImpl(Path dbPath = getCacheDir() + "/nix/binary-cache-v6.sqlite")
{
auto state(_state.lock());
Path dbPath = getCacheDir() + "/nix/binary-cache-v6.sqlite";
createDirs(dirOf(dbPath));
state->db = SQLite(dbPath);
@ -98,7 +97,7 @@ public:
state->db.exec(schema);
state->insertCache.create(state->db,
"insert or replace into BinaryCaches(url, timestamp, storeDir, wantMassQuery, priority) values (?, ?, ?, ?, ?)");
"insert into BinaryCaches(url, timestamp, storeDir, wantMassQuery, priority) values (?1, ?2, ?3, ?4, ?5) on conflict (url) do update set timestamp = ?2, storeDir = ?3, wantMassQuery = ?4, priority = ?5 returning id;");
state->queryCache.create(state->db,
"select id, storeDir, wantMassQuery, priority from BinaryCaches where url = ? and timestamp > ?");
@ -166,6 +165,8 @@ public:
return i->second;
}
private:
std::optional<Cache> queryCacheRaw(State & state, const std::string & uri)
{
auto i = state.caches.find(uri);
@ -173,15 +174,21 @@ public:
auto queryCache(state.queryCache.use()(uri)(time(0) - cacheInfoTtl));
if (!queryCache.next())
return std::nullopt;
state.caches.emplace(uri,
Cache{(int) queryCache.getInt(0), queryCache.getStr(1), queryCache.getInt(2) != 0, (int) queryCache.getInt(3)});
auto cache = Cache {
.id = (int) queryCache.getInt(0),
.storeDir = queryCache.getStr(1),
.wantMassQuery = queryCache.getInt(2) != 0,
.priority = (int) queryCache.getInt(3),
};
state.caches.emplace(uri, cache);
}
return getCache(state, uri);
}
void createCache(const std::string & uri, const Path & storeDir, bool wantMassQuery, int priority) override
public:
int createCache(const std::string & uri, const Path & storeDir, bool wantMassQuery, int priority) override
{
retrySQLite<void>([&]() {
return retrySQLite<int>([&]() {
auto state(_state.lock());
SQLiteTxn txn(state->db);
@ -190,17 +197,29 @@ public:
auto cache(queryCacheRaw(*state, uri));
if (cache)
return;
return cache->id;
state->insertCache.use()(uri)(time(0))(storeDir)(wantMassQuery)(priority).exec();
assert(sqlite3_changes(state->db) == 1);
state->caches[uri] = Cache{(int) sqlite3_last_insert_rowid(state->db), storeDir, wantMassQuery, priority};
Cache ret {
.id = -1, // set below
.storeDir = storeDir,
.wantMassQuery = wantMassQuery,
.priority = priority,
};
{
auto r(state->insertCache.use()(uri)(time(0))(storeDir)(wantMassQuery)(priority));
assert(r.next());
ret.id = (int) r.getInt(0);
}
state->caches[uri] = ret;
txn.commit();
return ret.id;
});
}
std::optional<CacheInfo> cacheExists(const std::string & uri) override
std::optional<CacheInfo> upToDateCacheExists(const std::string & uri) override
{
return retrySQLite<std::optional<CacheInfo>>([&]() -> std::optional<CacheInfo> {
auto state(_state.lock());
@ -208,6 +227,7 @@ public:
if (!cache)
return std::nullopt;
return CacheInfo {
.id = cache->id,
.wantMassQuery = cache->wantMassQuery,
.priority = cache->priority
};
@ -371,4 +391,9 @@ ref<NarInfoDiskCache> getNarInfoDiskCache()
return cache;
}
ref<NarInfoDiskCache> getTestNarInfoDiskCache(Path dbPath)
{
return make_ref<NarInfoDiskCacheImpl>(dbPath);
}
}

View file

@ -13,16 +13,17 @@ public:
virtual ~NarInfoDiskCache() { }
virtual void createCache(const std::string & uri, const Path & storeDir,
virtual int createCache(const std::string & uri, const Path & storeDir,
bool wantMassQuery, int priority) = 0;
struct CacheInfo
{
int id;
bool wantMassQuery;
int priority;
};
virtual std::optional<CacheInfo> cacheExists(const std::string & uri) = 0;
virtual std::optional<CacheInfo> upToDateCacheExists(const std::string & uri) = 0;
virtual std::pair<Outcome, std::shared_ptr<NarInfo>> lookupNarInfo(
const std::string & uri, const std::string & hashPart) = 0;
@ -45,4 +46,6 @@ public:
multiple threads. */
ref<NarInfoDiskCache> getNarInfoDiskCache();
ref<NarInfoDiskCache> getTestNarInfoDiskCache(Path dbPath);
}

View file

@ -6,4 +6,4 @@ Name: Nix
Description: Nix Package Manager
Version: @PACKAGE_VERSION@
Libs: -L${libdir} -lnixstore -lnixutil
Cflags: -I${includedir}/nix -std=c++20
Cflags: -I${includedir}/nix -std=c++2a

View file

@ -282,7 +282,7 @@ std::string optimisticLockProfile(const Path & profile)
Path profilesDir()
{
auto profileRoot = getDataDir() + "/nix/profiles";
auto profileRoot = createNixStateDir() + "/profiles";
createDirs(profileRoot);
return profileRoot;
}
@ -290,7 +290,7 @@ Path profilesDir()
Path getDefaultProfile()
{
Path profileLink = getHome() + "/.nix-profile";
Path profileLink = settings.useXDGBaseDirectories ? createNixStateDir() + "/profile" : getHome() + "/.nix-profile";
try {
auto profile =
getuid() == 0

View file

@ -72,8 +72,9 @@ std::string optimisticLockProfile(const Path & profile);
profiles. */
Path profilesDir();
/* Resolve ~/.nix-profile. If ~/.nix-profile doesn't exist yet, create
it. */
/* Resolve the default profile (~/.nix-profile by default, $XDG_STATE_HOME/
nix/profile if XDG Base Directory Support is enabled), and create if doesn't
exist */
Path getDefaultProfile();
}

View file

@ -266,6 +266,7 @@ void RemoteStore::setOptions(Connection & conn)
overrides.erase(settings.useSubstitutes.name);
overrides.erase(loggerSettings.showTrace.name);
overrides.erase(settings.experimentalFeatures.name);
overrides.erase(settings.pluginFiles.name);
conn.to << overrides.size();
for (auto & i : overrides)
conn.to << i.first << i.second.value;

View file

@ -238,7 +238,7 @@ struct S3BinaryCacheStoreImpl : virtual S3BinaryCacheStoreConfig, public virtual
void init() override
{
if (auto cacheInfo = diskCache->cacheExists(getUri())) {
if (auto cacheInfo = diskCache->upToDateCacheExists(getUri())) {
wantMassQuery.setDefault(cacheInfo->wantMassQuery);
priority.setDefault(cacheInfo->priority);
} else {

View file

@ -41,6 +41,15 @@ SQLiteError::SQLiteError(const char *path, const char *errMsg, int errNo, int ex
throw SQLiteError(path, errMsg, err, exterr, offset, std::move(hf));
}
static void traceSQL(void * x, const char * sql)
{
// wacky delimiters:
// so that we're quite unambiguous without escaping anything
// notice instead of trace:
// so that this can be enabled without getting the firehose in our face.
notice("SQL<[%1%]>", sql);
};
SQLite::SQLite(const Path & path, bool create)
{
// useSQLiteWAL also indicates what virtual file system we need. Using
@ -58,6 +67,11 @@ SQLite::SQLite(const Path & path, bool create)
if (sqlite3_busy_timeout(db, 60 * 60 * 1000) != SQLITE_OK)
SQLiteError::throw_(db, "setting timeout");
if (getEnv("NIX_DEBUG_SQLITE_TRACES") == "1") {
// To debug sqlite statements; trace all of them
sqlite3_trace(db, &traceSQL, nullptr);
}
exec("pragma foreign_keys = 1");
}

View file

@ -0,0 +1,124 @@
#include <nlohmann/json.hpp>
#include <gtest/gtest.h>
#include "derivations.hh"
#include "tests/libstore.hh"
namespace nix {
class DerivationTest : public LibStoreTest
{
};
#define TEST_JSON(TYPE, NAME, STR, VAL, ...) \
TEST_F(DerivationTest, TYPE ## _ ## NAME ## _to_json) { \
using nlohmann::literals::operator "" _json; \
ASSERT_EQ( \
STR ## _json, \
(TYPE { VAL }).toJSON(*store __VA_OPT__(,) __VA_ARGS__)); \
}
TEST_JSON(DerivationOutput, inputAddressed,
R"({
"path": "/nix/store/c015dhfh5l0lp6wxyvdn7bmwhbbr6hr9-drv-name-output-name"
})",
(DerivationOutput::InputAddressed {
.path = store->parseStorePath("/nix/store/c015dhfh5l0lp6wxyvdn7bmwhbbr6hr9-drv-name-output-name"),
}),
"drv-name", "output-name")
TEST_JSON(DerivationOutput, caFixed,
R"({
"hashAlgo": "r:sha256",
"hash": "894517c9163c896ec31a2adbd33c0681fd5f45b2c0ef08a64c92a03fb97f390f",
"path": "/nix/store/c015dhfh5l0lp6wxyvdn7bmwhbbr6hr9-drv-name-output-name"
})",
(DerivationOutput::CAFixed {
.hash = {
.method = FileIngestionMethod::Recursive,
.hash = Hash::parseAnyPrefixed("sha256-iUUXyRY8iW7DGirb0zwGgf1fRbLA7wimTJKgP7l/OQ8="),
},
}),
"drv-name", "output-name")
TEST_JSON(DerivationOutput, caFloating,
R"({
"hashAlgo": "r:sha256"
})",
(DerivationOutput::CAFloating {
.method = FileIngestionMethod::Recursive,
.hashType = htSHA256,
}),
"drv-name", "output-name")
TEST_JSON(DerivationOutput, deferred,
R"({ })",
DerivationOutput::Deferred { },
"drv-name", "output-name")
TEST_JSON(DerivationOutput, impure,
R"({
"hashAlgo": "r:sha256",
"impure": true
})",
(DerivationOutput::Impure {
.method = FileIngestionMethod::Recursive,
.hashType = htSHA256,
}),
"drv-name", "output-name")
TEST_JSON(Derivation, impure,
R"({
"inputSrcs": [
"/nix/store/c015dhfh5l0lp6wxyvdn7bmwhbbr6hr9-dep1"
],
"inputDrvs": {
"/nix/store/c015dhfh5l0lp6wxyvdn7bmwhbbr6hr9-dep2.drv": [
"cat",
"dog"
]
},
"system": "wasm-sel4",
"builder": "foo",
"args": [
"bar",
"baz"
],
"env": {
"BIG_BAD": "WOLF"
},
"outputs": {}
})",
({
Derivation drv;
drv.inputSrcs = {
store->parseStorePath("/nix/store/c015dhfh5l0lp6wxyvdn7bmwhbbr6hr9-dep1"),
};
drv.inputDrvs = {
{
store->parseStorePath("/nix/store/c015dhfh5l0lp6wxyvdn7bmwhbbr6hr9-dep2.drv"),
{
"cat",
"dog",
},
}
};
drv.platform = "wasm-sel4";
drv.builder = "foo";
drv.args = {
"bar",
"baz",
};
drv.env = {
{
"BIG_BAD",
"WOLF",
},
};
drv;
}))
#undef TEST_JSON
}

View file

@ -0,0 +1,123 @@
#include "nar-info-disk-cache.hh"
#include <gtest/gtest.h>
#include <rapidcheck/gtest.h>
#include "sqlite.hh"
#include <sqlite3.h>
namespace nix {
TEST(NarInfoDiskCacheImpl, create_and_read) {
// This is a large single test to avoid some setup overhead.
int prio = 12345;
bool wantMassQuery = true;
Path tmpDir = createTempDir();
AutoDelete delTmpDir(tmpDir);
Path dbPath(tmpDir + "/test-narinfo-disk-cache.sqlite");
int savedId;
int barId;
SQLite db;
SQLiteStmt getIds;
{
auto cache = getTestNarInfoDiskCache(dbPath);
// Set up "background noise" and check that different caches receive different ids
{
auto bc1 = cache->createCache("https://bar", "/nix/storedir", wantMassQuery, prio);
auto bc2 = cache->createCache("https://xyz", "/nix/storedir", false, 12);
ASSERT_NE(bc1, bc2);
barId = bc1;
}
// Check that the fields are saved and returned correctly. This does not test
// the select statement yet, because of in-memory caching.
savedId = cache->createCache("http://foo", "/nix/storedir", wantMassQuery, prio);;
{
auto r = cache->upToDateCacheExists("http://foo");
ASSERT_TRUE(r);
ASSERT_EQ(r->priority, prio);
ASSERT_EQ(r->wantMassQuery, wantMassQuery);
ASSERT_EQ(savedId, r->id);
}
// We're going to pay special attention to the id field because we had a bug
// that changed it.
db = SQLite(dbPath);
getIds.create(db, "select id from BinaryCaches where url = 'http://foo'");
{
auto q(getIds.use());
ASSERT_TRUE(q.next());
ASSERT_EQ(savedId, q.getInt(0));
ASSERT_FALSE(q.next());
}
// Pretend that the caches are older, but keep one up to date, as "background noise"
db.exec("update BinaryCaches set timestamp = timestamp - 1 - 7 * 24 * 3600 where url <> 'https://xyz';");
// This shows that the in-memory cache works
{
auto r = cache->upToDateCacheExists("http://foo");
ASSERT_TRUE(r);
ASSERT_EQ(r->priority, prio);
ASSERT_EQ(r->wantMassQuery, wantMassQuery);
}
}
{
// We can't clear the in-memory cache, so we use a new cache object. This is
// more realistic anyway.
auto cache2 = getTestNarInfoDiskCache(dbPath);
{
auto r = cache2->upToDateCacheExists("http://foo");
ASSERT_FALSE(r);
}
// "Update", same data, check that the id number is reused
cache2->createCache("http://foo", "/nix/storedir", wantMassQuery, prio);
{
auto r = cache2->upToDateCacheExists("http://foo");
ASSERT_TRUE(r);
ASSERT_EQ(r->priority, prio);
ASSERT_EQ(r->wantMassQuery, wantMassQuery);
ASSERT_EQ(r->id, savedId);
}
{
auto q(getIds.use());
ASSERT_TRUE(q.next());
auto currentId = q.getInt(0);
ASSERT_FALSE(q.next());
ASSERT_EQ(currentId, savedId);
}
// Check that the fields can be modified, and the id remains the same
{
auto r0 = cache2->upToDateCacheExists("https://bar");
ASSERT_FALSE(r0);
cache2->createCache("https://bar", "/nix/storedir", !wantMassQuery, prio + 10);
auto r = cache2->upToDateCacheExists("https://bar");
ASSERT_EQ(r->wantMassQuery, !wantMassQuery);
ASSERT_EQ(r->priority, prio + 10);
ASSERT_EQ(r->id, barId);
}
// // Force update (no use case yet; we only retrieve cache metadata when stale based on timestamp)
// {
// cache2->createCache("https://bar", "/nix/storedir", wantMassQuery, prio + 20);
// auto r = cache2->upToDateCacheExists("https://bar");
// ASSERT_EQ(r->wantMassQuery, wantMassQuery);
// ASSERT_EQ(r->priority, prio + 20);
// }
}
}
}

View file

@ -29,7 +29,15 @@ void Args::removeFlag(const std::string & longName)
void Completions::add(std::string completion, std::string description)
{
assert(description.find('\n') == std::string::npos);
description = trim(description);
// ellipsize overflowing content on the back of the description
auto end_index = description.find_first_of(".\n");
if (end_index != std::string::npos) {
auto needs_ellipsis = end_index != description.size() - 1;
description.resize(end_index);
if (needs_ellipsis)
description.append(" [...]");
}
insert(Completion {
.completion = completion,
.description = description

97
src/libutil/namespaces.cc Normal file
View file

@ -0,0 +1,97 @@
#if __linux__
#include "namespaces.hh"
#include "util.hh"
#include "finally.hh"
#include <sys/mount.h>
namespace nix {
bool userNamespacesSupported()
{
static auto res = [&]() -> bool
{
if (!pathExists("/proc/self/ns/user")) {
debug("'/proc/self/ns/user' does not exist; your kernel was likely built without CONFIG_USER_NS=y");
return false;
}
Path maxUserNamespaces = "/proc/sys/user/max_user_namespaces";
if (!pathExists(maxUserNamespaces) ||
trim(readFile(maxUserNamespaces)) == "0")
{
debug("user namespaces appear to be disabled; check '/proc/sys/user/max_user_namespaces'");
return false;
}
Path procSysKernelUnprivilegedUsernsClone = "/proc/sys/kernel/unprivileged_userns_clone";
if (pathExists(procSysKernelUnprivilegedUsernsClone)
&& trim(readFile(procSysKernelUnprivilegedUsernsClone)) == "0")
{
debug("user namespaces appear to be disabled; check '/proc/sys/kernel/unprivileged_userns_clone'");
return false;
}
try {
Pid pid = startProcess([&]()
{
_exit(0);
}, {
.cloneFlags = CLONE_NEWUSER
});
auto r = pid.wait();
assert(!r);
} catch (SysError & e) {
debug("user namespaces do not work on this system: %s", e.msg());
return false;
}
return true;
}();
return res;
}
bool mountAndPidNamespacesSupported()
{
static auto res = [&]() -> bool
{
try {
Pid pid = startProcess([&]()
{
/* Make sure we don't remount the parent's /proc. */
if (mount(0, "/", 0, MS_PRIVATE | MS_REC, 0) == -1)
_exit(1);
/* Test whether we can remount /proc. The kernel disallows
this if /proc is not fully visible, i.e. if there are
filesystems mounted on top of files inside /proc. See
https://lore.kernel.org/lkml/87tvsrjai0.fsf@xmission.com/T/. */
if (mount("none", "/proc", "proc", 0, 0) == -1)
_exit(2);
_exit(0);
}, {
.cloneFlags = CLONE_NEWNS | CLONE_NEWPID | (userNamespacesSupported() ? CLONE_NEWUSER : 0)
});
if (pid.wait()) {
debug("PID namespaces do not work on this system: cannot remount /proc");
return false;
}
} catch (SysError & e) {
debug("mount namespaces do not work on this system: %s", e.msg());
return false;
}
return true;
}();
return res;
}
}
#endif

13
src/libutil/namespaces.hh Normal file
View file

@ -0,0 +1,13 @@
#pragma once
namespace nix {
#if __linux__
bool userNamespacesSupported();
bool mountAndPidNamespacesSupported();
#endif
}

View file

@ -302,4 +302,37 @@ namespace nix {
ASSERT_EQ(d, s);
}
/* ----------------------------------------------------------------------------
* percentEncode
* --------------------------------------------------------------------------*/
TEST(percentEncode, encodesUrlEncodedString) {
std::string s = percentEncode("==@==");
std::string d = "%3D%3D%40%3D%3D";
ASSERT_EQ(d, s);
}
TEST(percentEncode, keepArgument) {
std::string a = percentEncode("abd / def");
std::string b = percentEncode("abd / def", "/");
ASSERT_EQ(a, "abd%20%2F%20def");
ASSERT_EQ(b, "abd%20/%20def");
}
TEST(percentEncode, inverseOfDecode) {
std::string original = "%3D%3D%40%3D%3D";
std::string once = percentEncode(original);
std::string back = percentDecode(once);
ASSERT_EQ(back, original);
}
TEST(percentEncode, trailingPercent) {
std::string s = percentEncode("==@==%");
std::string d = "%3D%3D%40%3D%3D%25";
ASSERT_EQ(d, s);
}
}

View file

@ -88,17 +88,22 @@ std::map<std::string, std::string> decodeQuery(const std::string & query)
return result;
}
std::string percentEncode(std::string_view s)
const static std::string allowedInQuery = ":@/?";
const static std::string allowedInPath = ":@/";
std::string percentEncode(std::string_view s, std::string_view keep)
{
std::string res;
for (auto & c : s)
// unreserved + keep
if ((c >= 'a' && c <= 'z')
|| (c >= 'A' && c <= 'Z')
|| (c >= '0' && c <= '9')
|| strchr("-._~!$&'()*+,;=:@", c))
|| strchr("-._~", c)
|| keep.find(c) != std::string::npos)
res += c;
else
res += fmt("%%%02x", (unsigned int) c);
res += fmt("%%%02X", (unsigned int) c);
return res;
}
@ -109,9 +114,9 @@ std::string encodeQuery(const std::map<std::string, std::string> & ss)
for (auto & [name, value] : ss) {
if (!first) res += '&';
first = false;
res += percentEncode(name);
res += percentEncode(name, allowedInQuery);
res += '=';
res += percentEncode(value);
res += percentEncode(value, allowedInQuery);
}
return res;
}
@ -122,7 +127,7 @@ std::string ParsedURL::to_string() const
scheme
+ ":"
+ (authority ? "//" + *authority : "")
+ path
+ percentEncode(path, allowedInPath)
+ (query.empty() ? "" : "?" + encodeQuery(query))
+ (fragment.empty() ? "" : "#" + percentEncode(fragment));
}

View file

@ -22,6 +22,7 @@ struct ParsedURL
MakeError(BadURL, Error);
std::string percentDecode(std::string_view in);
std::string percentEncode(std::string_view s, std::string_view keep="");
std::map<std::string, std::string> decodeQuery(const std::string & query);

View file

@ -36,6 +36,7 @@
#ifdef __linux__
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/mman.h>
#include <cmath>
#endif
@ -608,6 +609,19 @@ Path getDataDir()
return dataDir ? *dataDir : getHome() + "/.local/share";
}
Path getStateDir()
{
auto stateDir = getEnv("XDG_STATE_HOME");
return stateDir ? *stateDir : getHome() + "/.local/state";
}
Path createNixStateDir()
{
Path dir = getStateDir() + "/nix";
createDirs(dir);
return dir;
}
std::optional<Path> getSelfExe()
{
@ -1051,9 +1065,17 @@ static pid_t doFork(bool allowVfork, std::function<void()> fun)
}
static int childEntry(void * arg)
{
auto main = (std::function<void()> *) arg;
(*main)();
return 1;
}
pid_t startProcess(std::function<void()> fun, const ProcessOptions & options)
{
auto wrapper = [&]() {
std::function<void()> wrapper = [&]() {
if (!options.allowVfork)
logger = makeSimpleLogger();
try {
@ -1073,7 +1095,27 @@ pid_t startProcess(std::function<void()> fun, const ProcessOptions & options)
_exit(1);
};
pid_t pid = doFork(options.allowVfork, wrapper);
pid_t pid = -1;
if (options.cloneFlags) {
#ifdef __linux__
// Not supported, since then we don't know when to free the stack.
assert(!(options.cloneFlags & CLONE_VM));
size_t stackSize = 1 * 1024 * 1024;
auto stack = (char *) mmap(0, stackSize,
PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0);
if (stack == MAP_FAILED) throw SysError("allocating stack");
Finally freeStack([&]() { munmap(stack, stackSize); });
pid = clone(childEntry, stack + stackSize, options.cloneFlags | SIGCHLD, &wrapper);
#else
throw Error("clone flags are only supported on Linux");
#endif
} else
pid = doFork(options.allowVfork, wrapper);
if (pid == -1) throw SysError("unable to fork");
return pid;

View file

@ -158,6 +158,12 @@ Path getDataDir();
/* Return the path of the current executable. */
std::optional<Path> getSelfExe();
/* Return $XDG_STATE_HOME or $HOME/.local/state. */
Path getStateDir();
/* Create the Nix state directory and return the path to it. */
Path createNixStateDir();
/* Create a directory and all its parents, if necessary. Returns the
list of created directories, in order of creation. */
Paths createDirs(const Path & path);
@ -301,6 +307,7 @@ struct ProcessOptions
bool dieWithParent = true;
bool runExitHandlers = false;
bool allowVfork = false;
int cloneFlags = 0; // use clone() with the specified flags (Linux only)
};
pid_t startProcess(std::function<void()> fun, const ProcessOptions & options = ProcessOptions());

View file

@ -536,7 +536,9 @@ static void main_nix_build(int argc, char * * argv)
"SHELL=%5%; "
"BASH=%5%; "
"set +e; "
R"s([ -n "$PS1" -a -z "$NIX_SHELL_PRESERVE_PROMPT" ] && PS1='\n\[\033[1;32m\][nix-shell:\w]\$\[\033[0m\] '; )s"
R"s([ -n "$PS1" -a -z "$NIX_SHELL_PRESERVE_PROMPT" ] && )s" +
(getuid() == 0 ? R"s(PS1='\n\[\033[1;31m\][nix-shell:\w]\$\[\033[0m\] '; )s"
: R"s(PS1='\n\[\033[1;32m\][nix-shell:\w]\$\[\033[0m\] '; )s") +
"if [ \"$(type -t runHook)\" = function ]; then runHook shellHook; fi; "
"unset NIX_ENFORCE_PURITY; "
"shopt -u nullglob; "

View file

@ -164,8 +164,8 @@ static int main_nix_channel(int argc, char ** argv)
{
// Figure out the name of the `.nix-channels' file to use
auto home = getHome();
channelsList = home + "/.nix-channels";
nixDefExpr = home + "/.nix-defexpr";
channelsList = settings.useXDGBaseDirectories ? createNixStateDir() + "/channels" : home + "/.nix-channels";
nixDefExpr = settings.useXDGBaseDirectories ? createNixStateDir() + "/defexpr" : home + "/.nix-defexpr";
// Figure out the name of the channels profile.
profile = profilesDir() + "/channels";

View file

@ -1289,7 +1289,7 @@ static void opSwitchProfile(Globals & globals, Strings opFlags, Strings opArgs)
throw UsageError("exactly one argument expected");
Path profile = absPath(opArgs.front());
Path profileLink = getHome() + "/.nix-profile";
Path profileLink = settings.useXDGBaseDirectories ? createNixStateDir() + "/profile" : getHome() + "/.nix-profile";
switchLink(profileLink, profile);
}
@ -1393,7 +1393,10 @@ static int main_nix_env(int argc, char * * argv)
Globals globals;
globals.instSource.type = srcUnknown;
globals.instSource.nixExprPath = getHome() + "/.nix-defexpr";
{
Path nixExprPath = settings.useXDGBaseDirectories ? createNixStateDir() + "/defexpr" : getHome() + "/.nix-defexpr";
globals.instSource.nixExprPath = nixExprPath;
}
globals.instSource.systemFilter = "*";
if (!pathExists(globals.instSource.nixExprPath)) {

View file

@ -1,4 +1,5 @@
#include "installables.hh"
#include "installable-derived-path.hh"
#include "store-api.hh"
#include "eval-inline.hh"
#include "eval-cache.hh"
@ -8,30 +9,6 @@
namespace nix {
struct InstallableDerivedPath : Installable
{
ref<Store> store;
const DerivedPath derivedPath;
InstallableDerivedPath(ref<Store> store, const DerivedPath & derivedPath)
: store(store)
, derivedPath(derivedPath)
{
}
std::string what() const override { return derivedPath.to_string(*store); }
DerivedPathsWithInfo toDerivedPaths() override
{
return {{derivedPath}};
}
std::optional<StorePath> getStorePath() override
{
return std::nullopt;
}
};
/**
* Return the rewrites that are needed to resolve a string whose context is
* included in `dependencies`.
@ -146,7 +123,7 @@ App UnresolvedApp::resolve(ref<Store> evalStore, ref<Store> store)
for (auto & ctxElt : unresolved.context)
installableContext.push_back(
std::make_shared<InstallableDerivedPath>(store, ctxElt));
std::make_shared<InstallableDerivedPath>(store, DerivedPath { ctxElt }));
auto builtContext = Installable::build(evalStore, store, Realise::Outputs, installableContext);
res.program = resolveString(*store, unresolved.program, builtContext);

View file

@ -1,4 +1,5 @@
#include "command.hh"
#include "installable-flake.hh"
#include "common-args.hh"
#include "shared.hh"
#include "store-api.hh"

View file

@ -34,6 +34,43 @@
using namespace nix;
using namespace nix::daemon;
struct AuthorizationSettings : Config {
Setting<Strings> trustedUsers{
this, {"root"}, "trusted-users",
R"(
A list of names of users (separated by whitespace) that have
additional rights when connecting to the Nix daemon, such as the
ability to specify additional binary caches, or to import unsigned
NARs. You can also specify groups by prefixing them with `@`; for
instance, `@wheel` means all users in the `wheel` group. The default
is `root`.
> **Warning**
>
> Adding a user to `trusted-users` is essentially equivalent to
> giving that user root access to the system. For example, the user
> can set `sandbox-paths` and thereby obtain read access to
> directories that are otherwise inacessible to them.
)"};
/* ?Who we trust to use the daemon in safe ways */
Setting<Strings> allowedUsers{
this, {"*"}, "allowed-users",
R"(
A list of names of users (separated by whitespace) that are allowed
to connect to the Nix daemon. As with the `trusted-users` option,
you can specify groups by prefixing them with `@`. Also, you can
allow all users by specifying `*`. The default is `*`.
Note that trusted users are always allowed to connect.
)"};
};
AuthorizationSettings authorizationSettings;
static GlobalConfig::Register rSettings(&authorizationSettings);
#ifndef __linux__
#define SPLICE_F_MOVE 0
static ssize_t splice(int fd_in, void *off_in, int fd_out, void *off_out, size_t len, unsigned int flags)
@ -203,8 +240,8 @@ static void daemonLoop()
struct group * gr = peer.gidKnown ? getgrgid(peer.gid) : 0;
std::string group = gr ? gr->gr_name : std::to_string(peer.gid);
Strings trustedUsers = settings.trustedUsers;
Strings allowedUsers = settings.allowedUsers;
Strings trustedUsers = authorizationSettings.trustedUsers;
Strings allowedUsers = authorizationSettings.allowedUsers;
if (matchUser(user, group, trustedUsers))
trusted = Trusted;
@ -241,14 +278,7 @@ static void daemonLoop()
// Handle the connection.
FdSource from(remote.get());
FdSink to(remote.get());
processConnection(openUncachedStore(), from, to, trusted, NotRecursive, [&](Store & store) {
#if 0
/* Prevent users from doing something very dangerous. */
if (geteuid() == 0 &&
querySetting("build-users-group", "") == "")
throw Error("if you run 'nix-daemon' as root, then you MUST set 'build-users-group'!");
#endif
});
processConnection(openUncachedStore(), from, to, trusted, NotRecursive);
exit(0);
}, options);
@ -301,7 +331,7 @@ static void runDaemon(bool stdio)
/* Auth hook is empty because in this mode we blindly trust the
standard streams. Limiting access to those is explicitly
not `nix-daemon`'s responsibility. */
processConnection(openUncachedStore(), from, to, Trusted, NotRecursive, [&](Store & _){});
processConnection(openUncachedStore(), from, to, Trusted, NotRecursive);
}
} else
daemonLoop();

View file

@ -1,5 +1,6 @@
#include "eval.hh"
#include "command.hh"
#include "installable-flake.hh"
#include "common-args.hh"
#include "shared.hh"
#include "store-api.hh"

View file

@ -106,7 +106,7 @@ void printClosureDiff(
using namespace nix;
struct CmdDiffClosures : SourceExprCommand
struct CmdDiffClosures : SourceExprCommand, MixOperateOnOptions
{
std::string _before, _after;

View file

@ -3,6 +3,7 @@
#include "eval.hh"
#include "attr-path.hh"
#include "progress-bar.hh"
#include "editor-for.hh"
#include <unistd.h>

View file

@ -11,13 +11,13 @@
using namespace nix;
struct CmdEval : MixJSON, InstallableCommand
struct CmdEval : MixJSON, InstallableCommand, MixReadOnlyOption
{
bool raw = false;
std::optional<std::string> apply;
std::optional<Path> writeTo;
CmdEval() : InstallableCommand(true /* supportReadOnlyMode */)
CmdEval() : InstallableCommand()
{
addFlag({
.longName = "raw",

View file

@ -1,4 +1,5 @@
#include "command.hh"
#include "installable-flake.hh"
#include "common-args.hh"
#include "shared.hh"
#include "eval.hh"

View file

@ -1,4 +1,5 @@
#include "command.hh"
#include "installable-flake.hh"
#include "common-args.hh"
#include "shared.hh"
#include "store-api.hh"

95
src/nix/repl.cc Normal file
View file

@ -0,0 +1,95 @@
#include "eval.hh"
#include "globals.hh"
#include "command.hh"
#include "repl.hh"
namespace nix {
struct CmdRepl : InstallablesCommand
{
CmdRepl() {
evalSettings.pureEval = false;
}
void prepare() override
{
if (!settings.isExperimentalFeatureEnabled(Xp::ReplFlake) && !(file) && this->_installables.size() >= 1) {
warn("future versions of Nix will require using `--file` to load a file");
if (this->_installables.size() > 1)
warn("more than one input file is not currently supported");
auto filePath = this->_installables[0].data();
file = std::optional(filePath);
_installables.front() = _installables.back();
_installables.pop_back();
}
installables = InstallablesCommand::load();
}
std::vector<std::string> files;
Strings getDefaultFlakeAttrPaths() override
{
return {""};
}
bool useDefaultInstallables() override
{
return file.has_value() or expr.has_value();
}
bool forceImpureByDefault() override
{
return true;
}
std::string description() override
{
return "start an interactive environment for evaluating Nix expressions";
}
std::string doc() override
{
return
#include "repl.md"
;
}
void run(ref<Store> store) override
{
auto state = getEvalState();
auto getValues = [&]()->AbstractNixRepl::AnnotatedValues{
auto installables = load();
AbstractNixRepl::AnnotatedValues values;
for (auto & installable: installables){
auto what = installable->what();
if (file){
auto [val, pos] = installable->toValue(*state);
auto what = installable->what();
state->forceValue(*val, pos);
auto autoArgs = getAutoArgs(*state);
auto valPost = state->allocValue();
state->autoCallFunction(*autoArgs, *val, *valPost);
state->forceValue(*valPost, pos);
values.push_back( {valPost, what });
} else {
auto [val, pos] = installable->toValue(*state);
values.push_back( {val, what} );
}
}
return values;
};
auto repl = AbstractNixRepl::create(
searchPath,
openStore(),
state,
getValues
);
repl->autoArgs = getAutoArgs(*repl->state);
repl->initEnv();
repl->mainLoop();
}
};
static auto rCmdRepl = registerCommand<CmdRepl>("repl");
}

View file

@ -54,56 +54,8 @@ struct CmdShowDerivation : InstallablesCommand
for (auto & drvPath : drvPaths) {
if (!drvPath.isDerivation()) continue;
json& drvObj = jsonRoot[store->printStorePath(drvPath)];
auto drv = store->readDerivation(drvPath);
{
json& outputsObj = drvObj["outputs"];
outputsObj = json::object();
for (auto & [_outputName, output] : drv.outputs) {
auto & outputName = _outputName; // work around clang bug
auto& outputObj = outputsObj[outputName];
outputObj = json::object();
std::visit(overloaded {
[&](const DerivationOutput::InputAddressed & doi) {
outputObj["path"] = store->printStorePath(doi.path);
},
[&](const DerivationOutput::CAFixed & dof) {
outputObj["path"] = store->printStorePath(dof.path(*store, drv.name, outputName));
outputObj["hashAlgo"] = dof.hash.printMethodAlgo();
outputObj["hash"] = dof.hash.hash.to_string(Base16, false);
},
[&](const DerivationOutput::CAFloating & dof) {
outputObj["hashAlgo"] = makeFileIngestionPrefix(dof.method) + printHashType(dof.hashType);
},
[&](const DerivationOutput::Deferred &) {},
[&](const DerivationOutput::Impure & doi) {
outputObj["hashAlgo"] = makeFileIngestionPrefix(doi.method) + printHashType(doi.hashType);
outputObj["impure"] = true;
},
}, output.raw());
}
}
{
auto& inputsList = drvObj["inputSrcs"];
inputsList = json::array();
for (auto & input : drv.inputSrcs)
inputsList.emplace_back(store->printStorePath(input));
}
{
auto& inputDrvsObj = drvObj["inputDrvs"];
inputDrvsObj = json::object();
for (auto & input : drv.inputDrvs)
inputDrvsObj[store->printStorePath(input.first)] = input.second;
}
drvObj["system"] = drv.platform;
drvObj["builder"] = drv.builder;
drvObj["args"] = drv.args;
drvObj["env"] = drv.env;
jsonRoot[store->printStorePath(drvPath)] =
store->readDerivation(drvPath).toJSON(*store);
}
std::cout << jsonRoot.dump(2) << std::endl;
}

View file

@ -27,7 +27,7 @@ static std::string filterPrintable(const std::string & s)
return res;
}
struct CmdWhyDepends : SourceExprCommand
struct CmdWhyDepends : SourceExprCommand, MixOperateOnOptions
{
std::string _package, _dependency;
bool all = false;