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Remove HashType::Unknown

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Instead, `Hash` uses `std::optional<HashType>`. In the future, we may
also make `Hash` itself require a known hash type, encoraging people to
use `std::optional<Hash>` instead.
This commit is contained in:
John Ericson 2020-06-02 15:52:13 +00:00
parent 6dd471ebf6
commit 450dcf2c1b
14 changed files with 72 additions and 53 deletions
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2
src/libstore/export-import.cc
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@ -54,7 +54,7 @@ void Store::exportPath(const StorePath & path, Sink & sink)
filesystem corruption from spreading to other machines.
Don't complain if the stored hash is zero (unknown). */
Hash hash = hashAndWriteSink.currentHash();
if (hash != info->narHash && info->narHash != Hash(info->narHash.type))
if (hash != info->narHash && info->narHash != Hash(*info->narHash.type))
throw Error("hash of path '%s' has changed from '%s' to '%s'!",
printStorePath(path), info->narHash.to_string(), hash.to_string());