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Allow substitutes for builds that have preferLocalBuild set

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Not substituting builds with "preferLocalBuild = true" was a bad idea,
because it didn't take the cost of dependencies into account. For
instance, if we can't substitute a fetchgit call, then we have to
download/build git and all its dependencies.

Partially reverts 5558652709 and adds a
new derivation attribute "allowSubstitutes" to specify whether a
derivation may be substituted.
This commit is contained in:
Eelco Dolstra 2015-06-04 16:04:41 +02:00
parent b190f771e7
commit b64988bb35
3 changed files with 18 additions and 10 deletions
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4
src/libstore/misc.cc
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@ -120,7 +120,7 @@ void queryMissing(StoreAPI & store, const PathSet & targets,
if (invalid.empty()) continue;
todoDrv.insert(*i);
if (settings.useSubstitutes && !willBuildLocally(drv))
if (settings.useSubstitutes && substitutesAllowed(drv))
query.insert(invalid.begin(), invalid.end());
}
@ -144,7 +144,7 @@ void queryMissing(StoreAPI & store, const PathSet & targets,
PathSet outputs;
bool mustBuild = false;
if (settings.useSubstitutes && !willBuildLocally(drv)) {
if (settings.useSubstitutes && substitutesAllowed(drv)) {
foreach (DerivationOutputs::iterator, j, drv.outputs) {
if (!wantOutput(j->first, i2.second)) continue;
if (!store.isValidPath(j->second.path)) {