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* Handle sources (which are not in any equivalence class) properly.

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This commit is contained in:
Eelco Dolstra 2005-05-30 12:52:37 +00:00
parent 48190ccfca
commit cfe428f69c
1 changed files with 22 additions and 15 deletions
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35
src/libstore/misc.cc
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@ -80,8 +80,6 @@ static void findBestRewrite(const ClassMap::const_iterator & pos,
return;
}
// printMsg(lvlError, format("selection %1%") % showPaths(selection));
PathSet badPaths;
for (PathSet::iterator i = selection.begin();
i != selection.end(); ++i)
@ -104,7 +102,7 @@ static void findBestRewrite(const ClassMap::const_iterator & pos,
static Path maybeRewrite(const Path & path, const PathSet & selection,
const FinalClassMap & finalClassMap,
const FinalClassMap & finalClassMap, const PathSet & sources,
Replacements & replacements,
unsigned int & nrRewrites)
{
@ -122,20 +120,20 @@ static Path maybeRewrite(const Path & path, const PathSet & selection,
for (PathSet::iterator i = references.begin(); i != references.end(); ++i) {
OutputEqClasses classes;
queryOutputEqClasses(noTxn, *i, classes);
/* !!! hacky; ignore sources; they are not in any eq class */
if (*i == path || classes.size() == 0) {
if (*i == path || sources.find(*i) != sources.end()) {
newReferences.insert(*i);
continue; /* ignore self-references */
}
OutputEqClasses classes;
queryOutputEqClasses(noTxn, *i, classes);
assert(classes.size() > 0);
FinalClassMap::const_iterator j = finalClassMap.find(*(classes.begin()));
assert(j != finalClassMap.end());
Path newPath = maybeRewrite(j->second, selection,
finalClassMap, replacements, nrRewrites);
finalClassMap, sources, replacements, nrRewrites);
if (*i != newPath)
rewrites[hashPartOf(*i)] = hashPartOf(newPath);
@ -170,17 +168,20 @@ PathSet consolidatePaths(const PathSet & paths, bool checkOnly,
printMsg(lvlError, format("consolidating"));
ClassMap classMap;
PathSet sources;
for (PathSet::const_iterator i = paths.begin(); i != paths.end(); ++i) {
OutputEqClasses classes;
queryOutputEqClasses(noTxn, *i, classes);
/* !!! deal with sources */
for (OutputEqClasses::iterator j = classes.begin(); j != classes.end(); ++j) {
if (classes.size() == 0)
sources.insert(*i);
else
for (OutputEqClasses::iterator j = classes.begin(); j != classes.end(); ++j)
classMap[*j].insert(*i);
}
}
printMsg(lvlError, format("found %1% sources") % sources.size());
bool conflict = false;
for (ClassMap::iterator i = classMap.begin(); i != classMap.end(); ++i)
@ -193,6 +194,7 @@ PathSet consolidatePaths(const PathSet & paths, bool checkOnly,
assert(!checkOnly);
/* !!! exponential-time algorithm! */
const unsigned int infinity = 1000000;
unsigned int bestCost = infinity;
@ -216,9 +218,14 @@ PathSet consolidatePaths(const PathSet & paths, bool checkOnly,
replacements.clear();
for (PathSet::iterator i = bestSelection.begin();
i != bestSelection.end(); ++i)
newPaths.insert(maybeRewrite(*i, bestSelection, finalClassMap, replacements, nrRewrites));
newPaths.insert(maybeRewrite(*i, bestSelection, finalClassMap,
sources, replacements, nrRewrites));
newPaths.insert(sources.begin(), sources.end());
assert(nrRewrites == bestCost);
assert(newPaths.size() < paths.size());
return newPaths;
}