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Eliminate the "store" global variable

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Also, move a few free-standing functions into StoreAPI and Derivation.

Also, introduce a non-nullable smart pointer, ref<T>, which is just a
wrapper around std::shared_ptr ensuring that the pointer is never
null. (For reference-counted values, this is better than passing a
"T&", because the latter doesn't maintain the refcount. Usually, the
caller will have a shared_ptr keeping the value alive, but that's not
always the case, e.g., when passing a reference to a std::thread via
std::bind.)
This commit is contained in:
Eelco Dolstra 2016-02-04 14:28:26 +01:00
parent 4f7824c58e
commit c10c61449f
36 changed files with 511 additions and 458 deletions
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85
src/libstore/build.cc
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@ -2,7 +2,6 @@
#include "references.hh"
#include "pathlocks.hh"
#include "misc.hh"
#include "globals.hh"
#include "local-store.hh"
#include "util.hh"
@ -906,7 +905,7 @@ DerivationGoal::DerivationGoal(const Path & drvPath, const BasicDerivation & drv
{
this->drv = std::unique_ptr<BasicDerivation>(new BasicDerivation(drv));
state = &DerivationGoal::haveDerivation;
name = (format("building of %1%") % showPaths(outputPaths(drv))).str();
name = (format("building of %1%") % showPaths(drv.outputPaths())).str();
trace("created");
/* Prevent the .chroot directory from being
@ -1018,7 +1017,7 @@ void DerivationGoal::loadDerivation()
assert(worker.store.isValidPath(drvPath));
/* Get the derivation. */
drv = std::unique_ptr<BasicDerivation>(new Derivation(derivationFromPath(worker.store, drvPath)));
drv = std::unique_ptr<BasicDerivation>(new Derivation(worker.store.derivationFromPath(drvPath)));
haveDerivation();
}
@ -1057,7 +1056,7 @@ void DerivationGoal::haveDerivation()
/* We are first going to try to create the invalid output paths
through substitutes. If that doesn't work, we'll build
them. */
if (settings.useSubstitutes && substitutesAllowed(*drv))
if (settings.useSubstitutes && drv->substitutesAllowed())
for (auto & i : invalidOutputs)
addWaitee(worker.makeSubstitutionGoal(i, buildMode == bmRepair));
@ -1138,7 +1137,7 @@ void DerivationGoal::repairClosure()
PathSet outputClosure;
for (auto & i : drv->outputs) {
if (!wantOutput(i.first, wantedOutputs)) continue;
computeFSClosure(worker.store, i.second.path, outputClosure);
worker.store.computeFSClosure(i.second.path, outputClosure);
}
/* Filter out our own outputs (which we have already checked). */
@ -1149,11 +1148,11 @@ void DerivationGoal::repairClosure()
derivation is responsible for which path in the output
closure. */
PathSet inputClosure;
if (useDerivation) computeFSClosure(worker.store, drvPath, inputClosure);
if (useDerivation) worker.store.computeFSClosure(drvPath, inputClosure);
std::map<Path, Path> outputsToDrv;
for (auto & i : inputClosure)
if (isDerivation(i)) {
Derivation drv = derivationFromPath(worker.store, i);
Derivation drv = worker.store.derivationFromPath(i);
for (auto & j : drv.outputs)
outputsToDrv[j.second.path] = i;
}
@ -1225,10 +1224,10 @@ void DerivationGoal::inputsRealised()
`i' as input paths. Only add the closures of output paths
that are specified as inputs. */
assert(worker.store.isValidPath(i.first));
Derivation inDrv = derivationFromPath(worker.store, i.first);
Derivation inDrv = worker.store.derivationFromPath(i.first);
for (auto & j : i.second)
if (inDrv.outputs.find(j) != inDrv.outputs.end())
computeFSClosure(worker.store, inDrv.outputs[j].path, inputPaths);
worker.store.computeFSClosure(inDrv.outputs[j].path, inputPaths);
else
throw Error(
format("derivation ‘%1%’ requires non-existent output ‘%2%’ from input derivation ‘%3%’")
@ -1237,7 +1236,7 @@ void DerivationGoal::inputsRealised()
/* Second, the input sources. */
for (auto & i : drv->inputSrcs)
computeFSClosure(worker.store, i, inputPaths);
worker.store.computeFSClosure(i, inputPaths);
debug(format("added input paths %1%") % showPaths(inputPaths));
@ -1260,46 +1259,6 @@ void DerivationGoal::inputsRealised()
}
static bool isBuiltin(const BasicDerivation & drv)
{
return string(drv.builder, 0, 8) == "builtin:";
}
static bool canBuildLocally(const BasicDerivation & drv)
{
return drv.platform == settings.thisSystem
|| isBuiltin(drv)
#if __linux__
|| (drv.platform == "i686-linux" && settings.thisSystem == "x86_64-linux")
|| (drv.platform == "armv6l-linux" && settings.thisSystem == "armv7l-linux")
#elif __FreeBSD__
|| (drv.platform == "i686-linux" && settings.thisSystem == "x86_64-freebsd")
|| (drv.platform == "i686-linux" && settings.thisSystem == "i686-freebsd")
#endif
;
}
static string get(const StringPairs & map, const string & key, const string & def = "")
{
StringPairs::const_iterator i = map.find(key);
return i == map.end() ? def : i->second;
}
bool willBuildLocally(const BasicDerivation & drv)
{
return get(drv.env, "preferLocalBuild") == "1" && canBuildLocally(drv);
}
bool substitutesAllowed(const BasicDerivation & drv)
{
return get(drv.env, "allowSubstitutes", "1") == "1";
}
void DerivationGoal::tryToBuild()
{
trace("trying to build");
@ -1322,7 +1281,7 @@ void DerivationGoal::tryToBuild()
can't acquire the lock, then continue; hopefully some other
goal can start a build, and if not, the main loop will sleep a
few seconds and then retry this goal. */
if (!outputLocks.lockPaths(outputPaths(*drv), "", false)) {
if (!outputLocks.lockPaths(drv->outputPaths(), "", false)) {
worker.waitForAWhile(shared_from_this());
return;
}
@ -1342,7 +1301,7 @@ void DerivationGoal::tryToBuild()
return;
}
missingPaths = outputPaths(*drv);
missingPaths = drv->outputPaths();
if (buildMode != bmCheck)
for (auto & i : validPaths) missingPaths.erase(i);
@ -1365,7 +1324,7 @@ void DerivationGoal::tryToBuild()
/* Don't do a remote build if the derivation has the attribute
`preferLocalBuild' set. Also, check and repair modes are only
supported for local builds. */
bool buildLocally = buildMode != bmNormal || willBuildLocally(*drv);
bool buildLocally = buildMode != bmNormal || drv->willBuildLocally();
/* Is the build hook willing to accept this job? */
if (!buildLocally) {
@ -1661,7 +1620,7 @@ HookReply DerivationGoal::tryBuildHook()
list it since the remote system *probably* already has it.) */
PathSet allInputs;
allInputs.insert(inputPaths.begin(), inputPaths.end());
computeFSClosure(worker.store, drvPath, allInputs);
worker.store.computeFSClosure(drvPath, allInputs);
string s;
for (auto & i : allInputs) { s += i; s += ' '; }
@ -1716,7 +1675,7 @@ void DerivationGoal::startBuilder()
startNest(nest, lvlInfo, f % showPaths(missingPaths) % curRound % nrRounds);
/* Right platform? */
if (!canBuildLocally(*drv)) {
if (!drv->canBuildLocally()) {
if (settings.printBuildTrace)
printMsg(lvlError, format("@ unsupported-platform %1% %2%") % drvPath % drv->platform);
throw Error(
@ -1873,14 +1832,14 @@ void DerivationGoal::startBuilder()
like passing all build-time dependencies of some path to a
derivation that builds a NixOS DVD image. */
PathSet paths, paths2;
computeFSClosure(worker.store, storePath, paths);
worker.store.computeFSClosure(storePath, paths);
paths2 = paths;
for (auto & j : paths2) {
if (isDerivation(j)) {
Derivation drv = derivationFromPath(worker.store, j);
Derivation drv = worker.store.derivationFromPath(j);
for (auto & k : drv.outputs)
computeFSClosure(worker.store, k.second.path, paths);
worker.store.computeFSClosure(k.second.path, paths);
}
}
@ -1944,7 +1903,7 @@ void DerivationGoal::startBuilder()
PathSet closure;
for (auto & i : dirsInChroot)
if (isInStore(i.second))
computeFSClosure(worker.store, toStorePath(i.second), closure);
worker.store.computeFSClosure(toStorePath(i.second), closure);
for (auto & i : closure)
dirsInChroot[i] = i;
@ -2212,7 +2171,7 @@ void DerivationGoal::startBuilder()
#endif
{
ProcessOptions options;
options.allowVfork = !buildUser.enabled() && !isBuiltin(*drv);
options.allowVfork = !buildUser.enabled() && !drv->isBuiltin();
pid = startProcess([&]() {
runChild();
}, options);
@ -2466,7 +2425,7 @@ void DerivationGoal::runChild()
const char *builder = "invalid";
string sandboxProfile;
if (isBuiltin(*drv)) {
if (drv->isBuiltin()) {
;
#if __APPLE__
} else if (useChroot) {
@ -2583,7 +2542,7 @@ void DerivationGoal::runChild()
writeFull(STDERR_FILENO, string("\1\n"));
/* Execute the program. This should not return. */
if (isBuiltin(*drv)) {
if (drv->isBuiltin()) {
try {
logType = ltFlat;
if (drv->builder == "builtin:fetchurl")
@ -2813,7 +2772,7 @@ void DerivationGoal::registerOutputs()
for (auto & i : references)
/* Don't call computeFSClosure on ourselves. */
if (actualPath != i)
computeFSClosure(worker.store, i, used);
worker.store.computeFSClosure(i, used);
} else
used = references;