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authorzimbatm <zimbatm@zimbatm.com>2018-12-12T13·53+0100
committerzimbatm <zimbatm@zimbatm.com>2018-12-12T16·42+0100
commit5e6fa9092fb5be722f3568c687524416bc746423 (patch)
tree7770763b537edd58df5bd360387843b0a2d6052b /src/libstore/build.cc
parentf7425d55df5f5c39e778d437eba94540fee43f4a (diff)
libstore: improve hash mismatch error messages
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

```
Diffstat (limited to 'src/libstore/build.cc')
-rw-r--r--src/libstore/build.cc4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index 9c408e29c06c..59abae9b90db 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -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);