If a .drv cannot be parsed, show its path

Otherwise you just get ‘expected string `Derive(['’ which isn't very helpful.
This commit is contained in:
Eelco Dolstra 2014-04-08 19:24:29 +02:00
parent e0a947cde6
commit dfa2f77d2e
7 changed files with 22 additions and 10 deletions

View file

@ -67,7 +67,7 @@ static void prim_import(EvalState & state, const Pos & pos, Value * * args, Valu
}
if (isStorePath(path) && store->isValidPath(path) && isDerivation(path)) {
Derivation drv = parseDerivation(readFile(path));
Derivation drv = readDerivation(path);
Value & w = *state.allocValue();
state.mkAttrs(w, 1 + drv.outputs.size());
mkString(*state.allocAttr(w, state.sDrvPath), path, singleton<PathSet>("=" + path));

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@ -48,7 +48,7 @@ static Path parsePath(std::istream & str)
{
string s = parseString(str);
if (s.size() == 0 || s[0] != '/')
throw Error(format("bad path `%1%' in derivation") % s);
throw FormatError(format("bad path `%1%' in derivation") % s);
return s;
}
@ -62,7 +62,7 @@ static StringSet parseStrings(std::istream & str, bool arePaths)
}
Derivation parseDerivation(const string & s)
static Derivation parseDerivation(const string & s)
{
Derivation drv;
std::istringstream str(s);
@ -112,6 +112,16 @@ Derivation parseDerivation(const string & s)
}
Derivation readDerivation(const Path & drvPath)
{
try {
return parseDerivation(readFile(drvPath));
} catch (FormatError & e) {
throw Error(format("error parsing derivation `%1%': %2%") % drvPath % e.msg());
}
}
static void printString(string & res, const string & s)
{
res += '"';
@ -240,7 +250,7 @@ Hash hashDerivationModulo(StoreAPI & store, Derivation drv)
Hash h = drvHashes[i->first];
if (h.type == htUnknown) {
assert(store.isValidPath(i->first));
Derivation drv2 = parseDerivation(readFile(i->first));
Derivation drv2 = readDerivation(i->first);
h = hashDerivationModulo(store, drv2);
drvHashes[i->first] = h;
}

View file

@ -59,8 +59,8 @@ class StoreAPI;
Path writeDerivation(StoreAPI & store,
const Derivation & drv, const string & name, bool repair = false);
/* Parse a derivation. */
Derivation parseDerivation(const string & s);
/* Read a derivation from a file. */
Derivation readDerivation(const Path & drvPath);
/* Print a derivation. */
string unparseDerivation(const Derivation & drv);

View file

@ -661,7 +661,7 @@ unsigned long long LocalStore::addValidPath(const ValidPathInfo & info, bool che
efficiently query whether a path is an output of some
derivation. */
if (isDerivation(info.path)) {
Derivation drv = parseDerivation(readFile(info.path));
Derivation drv = readDerivation(info.path);
/* Verify that the output paths in the derivation are correct
(i.e., follow the scheme for computing output paths from
@ -1290,7 +1290,7 @@ void LocalStore::registerValidPaths(const ValidPathInfos & infos)
if (isDerivation(i->path)) {
// FIXME: inefficient; we already loaded the
// derivation in addValidPath().
Derivation drv = parseDerivation(readFile(i->path));
Derivation drv = readDerivation(i->path);
checkDerivationOutputs(i->path, drv);
}

View file

@ -11,7 +11,7 @@ Derivation derivationFromPath(StoreAPI & store, const Path & drvPath)
{
assertStorePath(drvPath);
store.ensurePath(drvPath);
return parseDerivation(readFile(drvPath));
return readDerivation(drvPath);
}

View file

@ -1041,7 +1041,7 @@ void expect(std::istream & str, const string & s)
char s2[s.size()];
str.read(s2, s.size());
if (string(s2, s.size()) != s)
throw Error(format("expected string `%1%'") % s);
throw FormatError(format("expected string `%1%'") % s);
}

View file

@ -326,6 +326,8 @@ bool hasSuffix(const string & s, const string & suffix);
/* Read string `s' from stream `str'. */
void expect(std::istream & str, const string & s);
MakeError(FormatError, Error)
/* Read a C-style string from stream `str'. */
string parseString(std::istream & str);