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* Substitute fixes.

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This commit is contained in:
Eelco Dolstra 2003-07-16 20:00:51 +00:00
parent b9ecadee6e
commit 9d56ca219f
8 changed files with 86 additions and 36 deletions
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27
src/store.cc
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@ -86,6 +86,7 @@ void copyPath(string src, string dst)
void registerSubstitute(const FSId & srcId, const FSId & subId)
{
#if 0
Strings subs;
queryListDB(nixDB, dbSubstitutes, srcId, subs); /* non-existence = ok */
@ -94,6 +95,12 @@ void registerSubstitute(const FSId & srcId, const FSId & subId)
subs.push_back(subId);
setListDB(nixDB, dbSubstitutes, srcId, subs);
#endif
/* For now, accept only one substitute per id. */
Strings subs;
subs.push_back(subId);
setListDB(nixDB, dbSubstitutes, srcId, subs);
}
@ -126,6 +133,8 @@ void unregisterPath(const string & _path)
return;
FSId id(parseHash(_id));
delDB(nixDB, dbPath2Id, path);
/* begin transaction */
Strings paths, paths2;
@ -140,6 +149,7 @@ void unregisterPath(const string & _path)
setListDB(nixDB, dbId2Paths, id, paths2);
/* end transaction */
}
@ -189,32 +199,31 @@ string expandId(const FSId & id, const string & target,
}
}
#if 0
/* Try to realise the substitutes. */
Strings subs;
queryListDB(nixDB, dbSubstitutes, id, subs); /* non-existence = ok */
for (Strings::iterator it = subs.begin(); it != subs.end(); it++) {
realiseSlice(normaliseFState(*it));
FSId subId = parseHash(*it);
Slice slice = normaliseFState(subId);
realiseSlice(slice);
FState nf = realiseFState(hash2fstate(parseHash(*it)), dummy);
string path = fstatePath(nf);
if (hashPath(path) != hash)
throw Error(format("bad substitute in `%1%'") % (string) path);
Strings paths = fstatePaths(subId, true);
if (paths.size() != 1)
throw Error("substitute created more than 1 path");
string path = *(paths.begin());
if (target.empty())
return path; /* !!! prefix */
else {
if (path != target) {
copyPath(path, target);
registerPath(target, hash);
registerPath(target, id);
}
return target;
}
}
#endif
throw Error(format("cannot expand id `%1%'") % (string) id);
}