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Input: Replace 'locked' bool by isLocked() method

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It's better to just check whether the input has all the attributes
needed to consider itself locked (e.g. whether a Git input has an
'rev' attribute).

Also, the 'locked' field was actually incorrect for Git inputs: it
would be set to true even for dirty worktrees. As a result, we got
away with using fetchTree() internally even though fetchTree()
requires a locked input in pure mode. In particular, this allowed
'--override-input' to work by accident.

The fix is to pass a set of "overrides" to call-flake.nix for all the
unlocked inputs (i.e. the top-level flake and any --override-inputs).
This commit is contained in:
Eelco Dolstra 2024-02-16 17:00:07 +01:00
parent 78e7c98b02
commit 071dd2b3a4
16 changed files with 155 additions and 85 deletions
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17
src/libexpr/flake/lockfile.cc
View file

@ -38,7 +38,7 @@ LockedNode::LockedNode(const nlohmann::json & json)
, isFlake(json.find("flake") != json.end() ? (bool) json["flake"] : true)
{
if (!lockedRef.input.isLocked())
throw Error("lock file contains mutable lock '%s'",
throw Error("lock file contains unlocked input '%s'",
fetchers::attrsToJSON(lockedRef.input.toAttrs()));
}
@ -134,10 +134,10 @@ LockFile::LockFile(const nlohmann::json & json, const Path & path)
// a bit since we don't need to worry about cycles.
}
nlohmann::json LockFile::toJSON() const
std::pair<nlohmann::json, LockFile::KeyMap> LockFile::toJSON() const
{
nlohmann::json nodes;
std::unordered_map<std::shared_ptr<const Node>, std::string> nodeKeys;
KeyMap nodeKeys;
std::unordered_set<std::string> keys;
std::function<std::string(const std::string & key, ref<const Node> node)> dumpNode;
@ -194,12 +194,13 @@ nlohmann::json LockFile::toJSON() const
json["root"] = dumpNode("root", root);
json["nodes"] = std::move(nodes);
return json;
return {json, std::move(nodeKeys)};
}
std::string LockFile::to_string() const
std::pair<std::string, LockFile::KeyMap> LockFile::to_string() const
{
return toJSON().dump(2);
auto [json, nodeKeys] = toJSON();
return {json.dump(2), std::move(nodeKeys)};
}
LockFile LockFile::read(const Path & path)
@ -210,7 +211,7 @@ LockFile LockFile::read(const Path & path)
std::ostream & operator <<(std::ostream & stream, const LockFile & lockFile)
{
stream << lockFile.toJSON().dump(2);
stream << lockFile.toJSON().first.dump(2);
return stream;
}
@ -243,7 +244,7 @@ std::optional<FlakeRef> LockFile::isUnlocked() const
bool LockFile::operator ==(const LockFile & other) const
{
// FIXME: slow
return toJSON() == other.toJSON();
return toJSON().first == other.toJSON().first;
}
bool LockFile::operator !=(const LockFile & other) const