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build-remote: Cope with long store URLs by falling back on hashing

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I hit this in the Meson port of the functional tests, because the use of
standalone build directories.
This commit is contained in:
John Ericson 2024-07-25 00:00:52 -04:00
parent dba1142c01
commit e92dd06a7b
1 changed files with 14 additions and 1 deletions
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15
src/build-remote/build-remote.cc
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@ -264,7 +264,20 @@ connected:
auto inputs = readStrings<PathSet>(source);
auto wantedOutputs = readStrings<StringSet>(source);
AutoCloseFD uploadLock = openLockFile(currentLoad + "/" + escapeUri(storeUri.render()) + ".upload-lock", true);
AutoCloseFD uploadLock;
{
auto setUpdateLock = [&](auto && fileName){
uploadLock = openLockFile(currentLoad + "/" + escapeUri(fileName) + ".upload-lock", true);
};
try {
setUpdateLock(storeUri.render());
} catch (SysError & e) {
if (e.errNo != ENAMETOOLONG) throw;
// Try again hashing the store URL so we have a shorter path
auto h = hashString(HashAlgorithm::MD5, storeUri.render());
setUpdateLock(h.to_string(HashFormat::Base64, false));
}
}
{
Activity act(*logger, lvlTalkative, actUnknown, fmt("waiting for the upload lock to '%s'", storeUri.render()));