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* Allow multiple --attr / -A arguments in nix-build / nix-instantiate

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(NIX-74).
This commit is contained in:
Eelco Dolstra 2007-01-13 18:25:30 +00:00
parent 215505bb46
commit f25f900045
1 changed files with 20 additions and 15 deletions
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29
src/nix-instantiate/nix-instantiate.cc
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@ -64,16 +64,19 @@ static void printResult(EvalState & state, Expr e,
}
Expr doEval(EvalState & state, string attrPath, bool parseOnly, bool strict,
const ATermMap & autoArgs, Expr e)
void processExpr(EvalState & state, const Strings & attrPaths,
bool parseOnly, bool strict, const ATermMap & autoArgs,
bool evalOnly, bool xmlOutput, Expr e)
{
e = findAlongAttrPath(state, attrPath, autoArgs, e);
for (Strings::const_iterator i = attrPaths.begin(); i != attrPaths.end(); ++i) {
Expr e2 = findAlongAttrPath(state, *i, autoArgs, e);
if (!parseOnly)
if (strict)
e = strictEvalExpr(state, e);
e2 = strictEvalExpr(state, e2);
else
e = evalExpr(state, e);
return e;
e2 = evalExpr(state, e2);
printResult(state, e2, evalOnly, xmlOutput, autoArgs);
}
}
@ -86,7 +89,7 @@ void run(Strings args)
bool parseOnly = false;
bool xmlOutput = false;
bool strict = false;
string attrPath;
Strings attrPaths;
ATermMap autoArgs(128);
for (Strings::iterator i = args.begin();
@ -107,7 +110,7 @@ void run(Strings args)
else if (arg == "--attr" || arg == "-A") {
if (i == args.end())
throw UsageError("`--attr' requires an argument");
attrPath = *i++;
attrPaths.push_back(*i++);
}
else if (arg == "--arg") {
if (i == args.end())
@ -135,12 +138,14 @@ void run(Strings args)
files.push_back(arg);
}
if (attrPaths.empty()) attrPaths.push_back("");
store = openStore();
if (readStdin) {
Expr e = parseStdin(state);
e = doEval(state, attrPath, parseOnly, strict, autoArgs, e);
printResult(state, e, evalOnly, xmlOutput, autoArgs);
processExpr(state, attrPaths, parseOnly, strict, autoArgs,
evalOnly, xmlOutput, e);
}
for (Strings::iterator i = files.begin();
@ -148,8 +153,8 @@ void run(Strings args)
{
Path path = absPath(*i);
Expr e = parseExprFromFile(state, path);
e = doEval(state, attrPath, parseOnly, strict, autoArgs, e);
printResult(state, e, evalOnly, xmlOutput, autoArgs);
processExpr(state, attrPaths, parseOnly, strict, autoArgs,
evalOnly, xmlOutput, e);
}
printEvalStats(state);