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* Pass to the build hook all sorts of information useful for

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distributing a build action to another machine.  In particular, the
  paths in the input closures, the output paths, and successor mapping
  for sub-derivations.
This commit is contained in:
Eelco Dolstra 2004-05-12 13:32:26 +00:00
parent 8c0b42f857
commit aa5a5084e4
1 changed files with 41 additions and 6 deletions
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47
src/libstore/normalise.cc
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@ -322,18 +322,17 @@ bool Normaliser::startBuild(Path nePath)
return true;
}
/* Right platform? */
if (goal.expr.derivation.platform != thisSystem)
throw Error(format("a `%1%' is required, but I am a `%2%'")
% goal.expr.derivation.platform % thisSystem);
/* Realise inputs (and remember all input paths). */
PathSet fnord;
map<Path, Path> xyzzy;
for (PathSet::iterator i = goal.expr.derivation.inputs.begin();
i != goal.expr.derivation.inputs.end(); ++i)
{
checkInterrupt();
Path nfPath = useSuccessor(*i);
realiseClosure(nfPath);
fnord.insert(nfPath);
if (nfPath != *i) xyzzy[*i] = nfPath;
/* !!! nfPath should be a root of the garbage collector while
we are building */
StoreExpr ne = storeExprFromPath(nfPath);
@ -369,7 +368,38 @@ bool Normaliser::startBuild(Path nePath)
Path buildHook = getEnv("NIX_BUILD_HOOK");
if (buildHook != "") {
printMsg(lvlChatty, format("using build hook `%1%'") % buildHook);
int status = system((buildHook + " " + goal.nePath + " 1>&2").c_str());
Path hookTmpDir = createTempDir();
Path inputListFN = hookTmpDir + "/inputs";
Path outputListFN = hookTmpDir + "/outputs";
Path successorsListFN = hookTmpDir + "/successors";
string s;
for (ClosureElems::iterator i = goal.inClosures.begin();
i != goal.inClosures.end(); ++i)
s += i->first + "\n";
for (PathSet::iterator i = fnord.begin();
i != fnord.end(); ++i)
s += *i + "\n";
writeStringToFile(inputListFN, s);
s = "";
for (PathSet::iterator i = goal.expr.derivation.outputs.begin();
i != goal.expr.derivation.outputs.end(); ++i)
s += *i + "\n";
writeStringToFile(outputListFN, s);
s = "";
for (map<Path, Path>::iterator i = xyzzy.begin();
i != xyzzy.end(); ++i)
s += i->first + " " + i->second + "\n";
writeStringToFile(successorsListFN, s);
int status = system((format("%1% %2% %3% %4% %5% %6% 1>&2")
% buildHook % goal.nePath % inputListFN % outputListFN
% successorsListFN
% goal.expr.derivation.platform).str().c_str());
if (WIFEXITED(status)) {
int code = WEXITSTATUS(status);
if (code == 100) { /* == accepted */
@ -384,6 +414,11 @@ bool Normaliser::startBuild(Path nePath)
format("build hook died with status %1%") % status);
}
/* Right platform? */
if (goal.expr.derivation.platform != thisSystem)
throw Error(format("a `%1%' is required, but I am a `%2%'")
% goal.expr.derivation.platform % thisSystem);
/* Otherwise, start the build in a child process. */
startBuildChild(goal);