forked from lix-project/lix
Use revcount/last-modified for computing the flake fingerprint
The store path is not enough. For example, when we build a dirty tree, commit, and build the clean tree, a re-evaluation is necessary because the flake may depend on the lastModified or revCount attributes.
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@ -686,7 +686,11 @@ Fingerprint ResolvedFlake::getFingerprint() const
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// and we haven't changed it, then it's sufficient to use
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// flake.sourceInfo.storePath for the fingerprint.
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return hashString(htSHA256,
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fmt("%s;%s", flake.sourceInfo.storePath, lockFile));
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fmt("%s;%d;%d;%s",
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flake.sourceInfo.storePath,
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flake.sourceInfo.revCount.value_or(0),
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flake.sourceInfo.lastModified.value_or(0),
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lockFile));
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}
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}
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