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nix/src/libexpr/flake/config.cc
John Ericson ac89bb064a Split up util.{hh,cc}
All OS and IO operations should be moved out, leaving only some misc
portable pure functions.

This is useful to avoid copious CPP when doing things like Windows and
Emscripten ports.

Newly exposed functions to break cycles:

 - `restoreSignals`
 - `updateWindowSize`
2023-11-05 12:20:02 -05:00

81 lines
2.8 KiB
C++

#include "users.hh"
#include "globals.hh"
#include "fetch-settings.hh"
#include "flake.hh"
#include <nlohmann/json.hpp>
namespace nix::flake {
// setting name -> setting value -> allow or ignore.
typedef std::map<std::string, std::map<std::string, bool>> TrustedList;
Path trustedListPath()
{
return getDataDir() + "/nix/trusted-settings.json";
}
static TrustedList readTrustedList()
{
auto path = trustedListPath();
if (!pathExists(path)) return {};
auto json = nlohmann::json::parse(readFile(path));
return json;
}
static void writeTrustedList(const TrustedList & trustedList)
{
auto path = trustedListPath();
createDirs(dirOf(path));
writeFile(path, nlohmann::json(trustedList).dump());
}
void ConfigFile::apply()
{
std::set<std::string> whitelist{"bash-prompt", "bash-prompt-prefix", "bash-prompt-suffix", "flake-registry", "commit-lockfile-summary"};
for (auto & [name, value] : settings) {
auto baseName = hasPrefix(name, "extra-") ? std::string(name, 6) : name;
// FIXME: Move into libutil/config.cc.
std::string valueS;
if (auto* s = std::get_if<std::string>(&value))
valueS = *s;
else if (auto* n = std::get_if<int64_t>(&value))
valueS = fmt("%d", *n);
else if (auto* b = std::get_if<Explicit<bool>>(&value))
valueS = b->t ? "true" : "false";
else if (auto ss = std::get_if<std::vector<std::string>>(&value))
valueS = concatStringsSep(" ", *ss); // FIXME: evil
else
assert(false);
if (!whitelist.count(baseName) && !nix::fetchSettings.acceptFlakeConfig) {
bool trusted = false;
auto trustedList = readTrustedList();
auto tlname = get(trustedList, name);
if (auto saved = tlname ? get(*tlname, valueS) : nullptr) {
trusted = *saved;
printInfo("Using saved setting for '%s = %s' from ~/.local/share/nix/trusted-settings.json.", name, valueS);
} else {
// FIXME: filter ANSI escapes, newlines, \r, etc.
if (std::tolower(logger->ask(fmt("do you want to allow configuration setting '%s' to be set to '" ANSI_RED "%s" ANSI_NORMAL "' (y/N)?", name, valueS)).value_or('n')) == 'y') {
trusted = true;
}
if (std::tolower(logger->ask(fmt("do you want to permanently mark this value as %s (y/N)?", trusted ? "trusted": "untrusted" )).value_or('n')) == 'y') {
trustedList[name][valueS] = trusted;
writeTrustedList(trustedList);
}
}
if (!trusted) {
warn("ignoring untrusted flake configuration setting '%s'.\nPass '%s' to trust it", name, "--accept-flake-config");
continue;
}
}
globalConfig.set(name, valueS);
}
}
}