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BinaryCacheStore: Implement getBuildLog()

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We assume that build logs are stored under log/<drv>, e.g.

  /nix/store/q7ab198v13p0f8x8wgnd75dva7d5mip6-friday-devil-0.1.1.1.drv

maps to

  https://cache.nixos.org/log/q7ab198v13p0f8x8wgnd75dva7d5mip6-friday-devil-0.1.1.1.drv
This commit is contained in:
Eelco Dolstra 2017-03-13 14:07:58 +01:00
parent 5b86451f02
commit 532d73d5d8
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3 changed files with 31 additions and 1 deletions
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24
src/libstore/binary-cache-store.cc
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@ -382,4 +382,28 @@ ref<FSAccessor> BinaryCacheStore::getFSAccessor()
return make_ref<RemoteFSAccessor>(ref<Store>(shared_from_this()));
}
std::shared_ptr<std::string> BinaryCacheStore::getBuildLog(const Path & path)
{
Path drvPath;
if (isDerivation(path))
drvPath = path;
else {
try {
auto info = queryPathInfo(path);
// FIXME: add a "Log" field to .narinfo
if (info->deriver == "") return nullptr;
drvPath = info->deriver;
} catch (InvalidPath &) {
return nullptr;
}
}
auto logPath = "log/" + baseNameOf(drvPath);
debug("fetching build log from binary cache ‘%s/%s’", getUri(), logPath);
return getFile(logPath);
}
}