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Turn NIX_PATH into a config setting

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This allows it to be set in nix.conf.
This commit is contained in:
Eelco Dolstra 2019-11-22 23:07:35 +01:00
parent ec9dd9a5ae
commit d12d69ea1a
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GPG key ID: 8170B4726D7198DE
2 changed files with 24 additions and 14 deletions
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31
src/libexpr/eval.cc
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@ -275,17 +275,6 @@ static Strings parseNixPath(const string & s)
}
static Strings getDefaultNixPath()
{
Strings res;
auto add = [&](const Path & p) { if (pathExists(p)) { res.push_back(p); } };
add(getHome() + "/.nix-defexpr/channels");
add("nixpkgs=" + settings.nixStateDir + "/nix/profiles/per-user/root/channels/nixpkgs");
add(settings.nixStateDir + "/nix/profiles/per-user/root/channels");
return res;
}
EvalState::EvalState(const Strings & _searchPath, ref<Store> store)
: sWith(symbols.create("<with>"))
, sOutPath(symbols.create("outPath"))
@ -325,10 +314,8 @@ EvalState::EvalState(const Strings & _searchPath, ref<Store> store)
/* Initialise the Nix expression search path. */
if (!evalSettings.pureEval) {
auto nixPath = getEnv("NIX_PATH");
auto paths = nixPath ? parseNixPath(*nixPath) : getDefaultNixPath();
for (auto & i : _searchPath) addToSearchPath(i);
for (auto & i : paths) addToSearchPath(i);
for (auto & i : evalSettings.nixPath.get()) addToSearchPath(i);
}
addToSearchPath("nix=" + canonPath(settings.nixDataDir + "/nix/corepkgs", true));
@ -1986,6 +1973,22 @@ std::ostream & operator << (std::ostream & str, const ExternalValueBase & v) {
}
EvalSettings::EvalSettings()
{
auto var = getEnv("NIX_PATH");
if (var) nixPath = parseNixPath(*var);
}
Strings EvalSettings::getDefaultNixPath()
{
Strings res;
auto add = [&](const Path & p) { if (pathExists(p)) { res.push_back(p); } };
add(getHome() + "/.nix-defexpr/channels");
add("nixpkgs=" + settings.nixStateDir + "/nix/profiles/per-user/root/channels/nixpkgs");
add(settings.nixStateDir + "/nix/profiles/per-user/root/channels");
return res;
}
EvalSettings evalSettings;
static GlobalConfig::Register r1(&evalSettings);

7
src/libexpr/eval.hh
View file

@ -339,9 +339,16 @@ struct InvalidPathError : EvalError
struct EvalSettings : Config
{
EvalSettings();
static Strings getDefaultNixPath();
Setting<bool> enableNativeCode{this, false, "allow-unsafe-native-code-during-evaluation",
"Whether builtin functions that allow executing native code should be enabled."};
Setting<Strings> nixPath{this, getDefaultNixPath(), "nix-path",
"List of directories to be searched for <...> file references."};
Setting<bool> restrictEval{this, false, "restrict-eval",
"Whether to restrict file system access to paths in $NIX_PATH, "
"and network access to the URI prefixes listed in 'allowed-uris'."};