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libstore: improve hash mismatch error messages

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Use the same output ordering and format everywhere.

This is such a common issue that we trade the single-line error message for
more readability.

Old message:
```
fixed-output derivation produced path '/nix/store/d4nw9x2sy9q3r32f3g5l5h1k833c01vq-example.com' with sha256 hash '08y4734bm2zahw75b16bcmcg587vvyvh0n11gwiyir70divwp1rm' instead of the expected hash '1xzwnipjd54wl8g93vpw6hxnpmdabq0wqywriiwmh7x8k0lvpq5m'
```

New message:
```
hash mismatch in fixed-output derivation '/nix/store/d4nw9x2sy9q3r32f3g5l5h1k833c01vq-example.com':
  wanted: sha256:1xzwnipjd54wl8g93vpw6hxnpmdabq0wqywriiwmh7x8k0lvpq5m
  got:    sha256:08y4734bm2zahw75b16bcmcg587vvyvh0n11gwiyir70divwp1rm

```
This commit is contained in:
Jonas Chevalier 2018-12-12 14:53:00 +01:00
parent f7425d55df
commit 5e6fa9092f
No known key found for this signature in database
GPG key ID: 71BAF6D40C1D63D7
3 changed files with 6 additions and 6 deletions
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4
src/libstore/build.cc
View file

@ -3129,8 +3129,8 @@ void DerivationGoal::registerOutputs()
/* Throw an error after registering the path as
valid. */
delayedException = std::make_exception_ptr(
BuildError("fixed-output derivation produced path '%s' with %s hash '%s' instead of the expected hash '%s'",
dest, printHashType(h.type), printHash16or32(h2), printHash16or32(h)));
BuildError("hash mismatch in fixed-output derivation '%s':\n wanted: %s\n got: %s",
dest, h.to_string(), h2.to_string()));
Path actualDest = worker.store.toRealPath(dest);

4
src/libstore/download.cc
View file

@ -881,8 +881,8 @@ Path Downloader::downloadCached(ref<Store> store, const string & url_, bool unpa
Hash gotHash = unpack
? hashPath(expectedHash.type, store->toRealPath(storePath)).first
: hashFile(expectedHash.type, store->toRealPath(storePath));
throw nix::Error("hash mismatch in file downloaded from '%s': got hash '%s' instead of the expected hash '%s'",
url, gotHash.to_string(), expectedHash.to_string());
throw nix::Error("hash mismatch in file downloaded from '%s':\n wanted: %s\n got: %s",
url, expectedHash.to_string(), gotHash.to_string());
}
return store->toRealPath(storePath);

4
src/libstore/local-store.cc
View file

@ -1022,11 +1022,11 @@ void LocalStore::addToStore(const ValidPathInfo & info, Source & source,
auto hashResult = hashSink.finish();
if (hashResult.first != info.narHash)
throw Error("hash mismatch importing path '%s'; expected hash '%s', got '%s'",
throw Error("hash mismatch importing path '%s';\n wanted: %s\n got: %s",
info.path, info.narHash.to_string(), hashResult.first.to_string());
if (hashResult.second != info.narSize)
throw Error("size mismatch importing path '%s'; expected %s, got %s",
throw Error("size mismatch importing path '%s';\n wanted: %s\n got: %s",
info.path, info.narSize, hashResult.second);
autoGC();