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Break out lambda so output can be matched just once

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This is much better.
This commit is contained in:
John Ericson 2020-08-12 02:23:31 +00:00
parent 18834f7764
commit 5f80aea795
1 changed files with 42 additions and 44 deletions
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86
src/libstore/build.cc
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@ -3973,42 +3973,7 @@ void DerivationGoal::registerOutputs()
return res; return res;
}; };
ValidPathInfo newInfo = [&]() {if (auto outputP = std::get_if<DerivationOutputInputAddressed>(&output.output)) { auto newInfoFromCA = [&](const DerivationOutputCAFloating outputHash) -> ValidPathInfo {
/* input-addressed case */
auto requiredFinalPath = outputP->path;
/* Preemtively add rewrite rule for final hash, as that is
what the NAR hash will use rather than normalized-self references */
if (scratchPath != requiredFinalPath)
outputRewrites.insert_or_assign(
std::string { scratchPath.hashPart() },
std::string { requiredFinalPath.hashPart() });
rewriteOutput();
auto narHashAndSize = hashPath(htSHA256, actualPath);
ValidPathInfo newInfo0 { requiredFinalPath };
newInfo0.narHash = narHashAndSize.first;
newInfo0.narSize = narHashAndSize.second;
auto refs = rewriteRefs();
newInfo0.references = refs.second;
if (refs.first)
newInfo0.references.insert(newInfo0.path);
return newInfo0;
} else {
/* content-addressed case */
DerivationOutputCAFloating outputHash = std::visit(overloaded {
[&](DerivationOutputInputAddressed doi) -> DerivationOutputCAFloating {
// Enclosing `if` handles this case in other branch
throw Error("ought to unreachable, handled in other branch");
},
[&](DerivationOutputCAFixed dof) {
return DerivationOutputCAFloating {
.method = dof.hash.method,
.hashType = dof.hash.hash.type,
};
},
[&](DerivationOutputCAFloating dof) {
return dof;
},
}, output.output);
auto & st = outputStats.at(outputName); auto & st = outputStats.at(outputName);
if (outputHash.method == FileIngestionMethod::Flat) { if (outputHash.method == FileIngestionMethod::Flat) {
/* The output path should be a regular file without execute permission. */ /* The output path should be a regular file without execute permission. */
@ -4055,9 +4020,41 @@ void DerivationGoal::registerOutputs()
newInfo0.narSize = narHashAndSize.second; newInfo0.narSize = narHashAndSize.second;
} }
/* Check wanted hash if output is fixed */ assert(newInfo0.ca);
if (auto p = std::get_if<DerivationOutputCAFixed>(&output.output)) { return newInfo0;
Hash & wanted = p->hash.hash; };
ValidPathInfo newInfo = std::visit(overloaded {
[&](DerivationOutputInputAddressed output) {
/* input-addressed case */
auto requiredFinalPath = output.path;
/* Preemtively add rewrite rule for final hash, as that is
what the NAR hash will use rather than normalized-self references */
if (scratchPath != requiredFinalPath)
outputRewrites.insert_or_assign(
std::string { scratchPath.hashPart() },
std::string { requiredFinalPath.hashPart() });
rewriteOutput();
auto narHashAndSize = hashPath(htSHA256, actualPath);
ValidPathInfo newInfo0 { requiredFinalPath };
newInfo0.narHash = narHashAndSize.first;
newInfo0.narSize = narHashAndSize.second;
auto refs = rewriteRefs();
newInfo0.references = refs.second;
if (refs.first)
newInfo0.references.insert(newInfo0.path);
return newInfo0;
},
[&](DerivationOutputCAFixed dof) {
auto newInfo0 = newInfoFromCA(DerivationOutputCAFloating {
.method = dof.hash.method,
.hashType = dof.hash.hash.type,
});
/* Check wanted hash */
Hash & wanted = dof.hash.hash;
assert(newInfo0.ca);
auto got = getContentAddressHash(*newInfo0.ca);
if (wanted != got) { if (wanted != got) {
/* Throw an error after registering the path as /* Throw an error after registering the path as
valid. */ valid. */
@ -4068,11 +4065,12 @@ void DerivationGoal::registerOutputs()
wanted.to_string(SRI, true), wanted.to_string(SRI, true),
got.to_string(SRI, true))); got.to_string(SRI, true)));
} }
} return newInfo0;
},
assert(newInfo0.ca); [&](DerivationOutputCAFloating dof) {
return newInfo0; return newInfoFromCA(dof);
}}(); },
}, output.output);
/* Calculate where we'll move the output files. In the checking case we /* Calculate where we'll move the output files. In the checking case we
will leave leave them where they are, for now, rather than move to will leave leave them where they are, for now, rather than move to