wroclaw-git-backups/nix
1
0
Fork 0
mirror of https://github.com/NixOS/nix synced 2025-06-28 09:31:16 +02:00
Code Activity

Merge remote-tracking branch 'origin/master' into flakes

Browse source
This commit is contained in:
Eelco Dolstra 2019-11-06 10:44:21 +01:00
commit 88c452d160
No known key found for this signature in database
GPG key ID: 8170B4726D7198DE
17 changed files with 155 additions and 83 deletions
Download patch file Download diff file Expand all files Collapse all files

32
src/libexpr/attr-path.cc
View file

@ -93,4 +93,36 @@ Value * findAlongAttrPath(EvalState & state, const string & attrPath,
}
Pos findDerivationFilename(EvalState & state, Value & v, std::string what)
{
Value * v2;
try {
auto dummyArgs = state.allocBindings(0);
v2 = findAlongAttrPath(state, "meta.position", *dummyArgs, v);
} catch (Error &) {
throw Error("package '%s' has no source location information", what);
}
// FIXME: is it possible to extract the Pos object instead of doing this
// toString + parsing?
auto pos = state.forceString(*v2);
auto colon = pos.rfind(':');
if (colon == std::string::npos)
throw Error("cannot parse meta.position attribute '%s'", pos);
std::string filename(pos, 0, colon);
unsigned int lineno;
try {
lineno = std::stoi(std::string(pos, colon + 1));
} catch (std::invalid_argument & e) {
throw Error("cannot parse line number '%s'", pos);
}
Symbol file = state.symbols.create(filename);
return { file, lineno, 0 };
}
}

3
src/libexpr/attr-path.hh
View file

@ -12,4 +12,7 @@ MakeError(AttrPathNotFound, Error);
Value * findAlongAttrPath(EvalState & state, const string & attrPath,
Bindings & autoArgs, Value & vIn);
/* Heuristic to find the filename and lineno or a nix value. */
Pos findDerivationFilename(EvalState & state, Value & v, std::string what);
}