diff options
| -rw-r--r-- | src/libexpr/primops.cc | 115 |
1 files changed, 33 insertions, 82 deletions
diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc index 5c476ddd4..074181e13 100644 --- a/src/libexpr/primops.cc +++ b/src/libexpr/primops.cc @@ -102,17 +102,30 @@ static Path realisePath(EvalState & state, const Pos & pos, Value & v, const Rea { PathSet context; - Path path = flags.requireAbsolutePath - ? state.coerceToPath(pos, v, context) - : state.coerceToString(pos, v, context, false, false); + auto path = [&]() + { + try { + return flags.requireAbsolutePath + ? state.coerceToPath(pos, v, context) + : state.coerceToString(pos, v, context, false, false); + } catch (Error & e) { + e.addTrace(pos, "while realising the context of a path"); + throw; + } + }(); - StringMap rewrites = state.realiseContext(context); + try { + StringMap rewrites = state.realiseContext(context); - auto realPath = state.toRealPath(rewriteStrings(path, rewrites), context); + auto realPath = state.toRealPath(rewriteStrings(path, rewrites), context); - return flags.checkForPureEval - ? state.checkSourcePath(realPath) - : realPath; + return flags.checkForPureEval + ? state.checkSourcePath(realPath) + : realPath; + } catch (Error & e) { + e.addTrace(pos, "while realising the context of path '%s'", path); + throw; + } } /* Add and attribute to the given attribute map from the output name to @@ -150,18 +163,7 @@ static void mkOutputString( argument. */ static void import(EvalState & state, const Pos & pos, Value & vPath, Value * vScope, Value & v) { - Path path; - try { - path = realisePath(state, pos, vPath); - } catch (InvalidPathError & e) { - throw EvalError({ - .msg = hintfmt("cannot import '%1%', since path '%2%' is not valid", path, e.path), - .errPos = pos - }); - } catch (Error & e) { - e.addTrace(pos, "while importing '%s'", path); - throw; - } + auto path = realisePath(state, pos, vPath); // FIXME auto isValidDerivationInStore = [&]() -> std::optional<StorePath> { @@ -314,18 +316,7 @@ extern "C" typedef void (*ValueInitializer)(EvalState & state, Value & v); /* Load a ValueInitializer from a DSO and return whatever it initializes */ void prim_importNative(EvalState & state, const Pos & pos, Value * * args, Value & v) { - Path path; - try { - path = realisePath(state, pos, *args[0]); - } catch (InvalidPathError & e) { - throw EvalError({ - .msg = hintfmt("cannot import '%1%', since path '%2%' is not valid", path, e.path), - .errPos = pos - }); - } catch (Error & e) { - e.addTrace(pos, "while importing '%s'", path); - throw; - } + auto path = realisePath(state, pos, *args[0]); string sym = state.forceStringNoCtx(*args[1], pos); @@ -1379,22 +1370,12 @@ static RegisterPrimOp primop_storePath({ static void prim_pathExists(EvalState & state, const Pos & pos, Value * * args, Value & v) { - Path path; - try { - // We don’t check the path right now, because we don’t want to throw if - // the path isn’t allowed, but just return false - // (and we can’t just catch the exception here because we still want to - // throw if something in the evaluation of `*args[0]` tries to access an - // unauthorized path) - path = realisePath(state, pos, *args[0], { .checkForPureEval = false }); - } catch (InvalidPathError & e) { - throw EvalError({ - .msg = hintfmt( - "cannot check the existence of '%1%', since path '%2%' is not valid", - path, e.path), - .errPos = pos - }); - } + /* We don’t check the path right now, because we don’t want to + throw if the path isn’t allowed, but just return false (and we + can’t just catch the exception here because we still want to + throw if something in the evaluation of `*args[0]` tries to + access an unauthorized path). */ + auto path = realisePath(state, pos, *args[0], { .checkForPureEval = false }); try { v.mkBool(pathExists(state.checkSourcePath(path))); @@ -1460,15 +1441,7 @@ static RegisterPrimOp primop_dirOf({ /* Return the contents of a file as a string. */ static void prim_readFile(EvalState & state, const Pos & pos, Value * * args, Value & v) { - Path path; - try { - path = realisePath(state, pos, *args[0]); - } catch (InvalidPathError & e) { - throw EvalError({ - .msg = hintfmt("cannot read '%1%', since path '%2%' is not valid", path, e.path), - .errPos = pos - }); - } + auto path = realisePath(state, pos, *args[0]); string s = readFile(path); if (s.find((char) 0) != string::npos) throw Error("the contents of the file '%1%' cannot be represented as a Nix string", path); @@ -1512,16 +1485,7 @@ static void prim_findFile(EvalState & state, const Pos & pos, Value * * args, Va pos ); - Path path; - - try { - path = realisePath(state, pos, *i->value, { .requireAbsolutePath = false }); - } catch (InvalidPathError & e) { - throw EvalError({ - .msg = hintfmt("cannot find '%1%', since path '%2%' is not valid", path, e.path), - .errPos = pos - }); - } + auto path = realisePath(state, pos, *i->value, { .requireAbsolutePath = false }); searchPath.emplace_back(prefix, path); } @@ -1548,12 +1512,7 @@ static void prim_hashFile(EvalState & state, const Pos & pos, Value * * args, Va .errPos = pos }); - Path path; - try { - path = realisePath(state, pos, *args[1]); - } catch (InvalidPathError & e) { - throw EvalError("cannot read '%s' since path '%s' is not valid, at %s", path, e.path, pos); - } + auto path = realisePath(state, pos, *args[1]); v.mkString(hashFile(*ht, path).to_string(Base16, false)); } @@ -1572,15 +1531,7 @@ static RegisterPrimOp primop_hashFile({ /* Read a directory (without . or ..) */ static void prim_readDir(EvalState & state, const Pos & pos, Value * * args, Value & v) { - Path path; - try { - path = realisePath(state, pos, *args[0]); - } catch (InvalidPathError & e) { - throw EvalError({ - .msg = hintfmt("cannot read '%1%', since path '%2%' is not valid", path, e.path), - .errPos = pos - }); - } + auto path = realisePath(state, pos, *args[0]); DirEntries entries = readDirectory(path); |