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Revert "Prevent config.h from being clobbered"

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This reverts commit 28bba8c44f.
This commit is contained in:
Eelco Dolstra 2013-03-08 01:24:59 +01:00
parent e73d9e9488
commit bdd4646338
27 changed files with 277 additions and 165 deletions
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16
src/libexpr/primops.cc
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@ -1107,6 +1107,21 @@ static void prim_unsafeDiscardOutputDependency(EvalState & state, Value * * args
}
/* Return the cryptographic hash of a string in base-16. */
static void prim_hashString(EvalState & state, Value * * args, Value & v)
{
string type = state.forceStringNoCtx(*args[0]);
HashType ht = parseHashType(type);
if (ht == htUnknown)
throw Error(format("unknown hash type `%1%'") % type);
PathSet context; // discarded
string s = state.forceString(*args[1], context);
mkString(v, printHash(hashString(ht, s)), context);
};
/*************************************************************
* Versions
*************************************************************/
@ -1234,6 +1249,7 @@ void EvalState::createBaseEnv()
addPrimOp("__stringLength", 1, prim_stringLength);
addPrimOp("__unsafeDiscardStringContext", 1, prim_unsafeDiscardStringContext);
addPrimOp("__unsafeDiscardOutputDependency", 1, prim_unsafeDiscardOutputDependency);
addPrimOp("__hashString", 2, prim_hashString);
// Versions
addPrimOp("__parseDrvName", 1, prim_parseDrvName);