Maximilian Bosch
bb1a851bcf
This actually bit me quite recently in `nixpkgs` because I assumed that `nix-build --check` would also error out if hashes don't match anymore[1] and so I wrongly assumed that I couldn't reproduce the mismatch error. The fix is rather simple, during the output registration a so-called `delayedException` is instantiated e.g. if a FOD hash-mismatch occurs. However, in case of `nix-build --check` (or `--rebuild` in case of `nix build`), the code-path where this exception is thrown will never be reached. By adding that check to the if-clause that causes an early exit in case of `bmCheck`, the issue is gone. Also added a (previously failing) test-case to demonstrate the problem. [1] https://github.com/NixOS/nixpkgs/pull/139238, the underlying issue was that `nix-prefetch-git` returns different hashes than `fetchgit` because the latter one fetches submodules by default.
58 lines
1.7 KiB
Bash
58 lines
1.7 KiB
Bash
source common.sh
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clearStore
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path=$(nix-store -q $(nix-instantiate fixed.nix -A good.0))
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echo 'testing bad...'
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nix-build fixed.nix -A bad --no-out-link && fail "should fail"
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# Building with the bad hash should produce the "good" output path as
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# a side-effect.
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[[ -e $path ]]
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nix path-info --json $path | grep fixed:md5:2qk15sxzzjlnpjk9brn7j8ppcd
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echo 'testing good...'
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nix-build fixed.nix -A good --no-out-link
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if isDaemonNewer "2.4pre20210927"; then
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echo 'testing --check...'
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nix-build fixed.nix -A check --check && fail "should fail"
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fi
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echo 'testing good2...'
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nix-build fixed.nix -A good2 --no-out-link
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echo 'testing reallyBad...'
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nix-instantiate fixed.nix -A reallyBad && fail "should fail"
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# While we're at it, check attribute selection a bit more.
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echo 'testing attribute selection...'
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test $(nix-instantiate fixed.nix -A good.1 | wc -l) = 1
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# Test parallel builds of derivations that produce the same output.
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# Only one should run at the same time.
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echo 'testing parallelSame...'
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clearStore
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nix-build fixed.nix -A parallelSame --no-out-link -j2
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# Fixed-output derivations with a recursive SHA-256 hash should
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# produce the same path as "nix-store --add".
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echo 'testing sameAsAdd...'
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out=$(nix-build fixed.nix -A sameAsAdd --no-out-link)
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# This is what fixed.builder2 produces...
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rm -rf $TEST_ROOT/fixed
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mkdir $TEST_ROOT/fixed
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mkdir $TEST_ROOT/fixed/bla
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echo "Hello World!" > $TEST_ROOT/fixed/foo
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ln -s foo $TEST_ROOT/fixed/bar
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out2=$(nix-store --add $TEST_ROOT/fixed)
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[ "$out" = "$out2" ]
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out3=$(nix-store --add-fixed --recursive sha256 $TEST_ROOT/fixed)
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[ "$out" = "$out3" ]
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out4=$(nix-store --print-fixed-path --recursive sha256 "1ixr6yd3297ciyp9im522dfxpqbkhcw0pylkb2aab915278fqaik" fixed)
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[ "$out" = "$out4" ]
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