forked from lix-project/lix
![Eelco Dolstra](/assets/img/avatar_default.png)
If the options gc-keep-outputs and gc-keep-derivations are both enabled, you can get a cycle in the liveness graph. There was a hack to handle this, but it didn't work with multiple-output derivations, causing the garbage collector to fail with errors like ‘error: cannot delete path `...' because it is in use by `...'’. The garbage collector now handles strongly connected components in the liveness graph as a unit and decides whether to delete all or none of the paths in an SCC.
61 lines
2.1 KiB
Bash
61 lines
2.1 KiB
Bash
source common.sh
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clearStore
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# Test whether read-only evaluation works when referring to the
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# ‘drvPath’ attribute.
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echo "evaluating c..."
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#drvPath=$(nix-instantiate multiple-outputs.nix -A c --readonly-mode)
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# And check whether the resulting derivation explicitly depends on all
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# outputs.
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drvPath=$(nix-instantiate multiple-outputs.nix -A c)
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#[ "$drvPath" = "$drvPath2" ]
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grep -q 'multiple-outputs-a.drv",\["first","second"\]' $drvPath
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grep -q 'multiple-outputs-b.drv",\["out"\]' $drvPath
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# While we're at it, test the ‘unsafeDiscardOutputDependency’ primop.
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outPath=$(nix-build multiple-outputs.nix -A d --no-out-link)
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drvPath=$(cat $outPath/drv)
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outPath=$(nix-store -q $drvPath)
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! [ -e "$outPath" ]
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# Do a build of something that depends on a derivation with multiple
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# outputs.
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echo "building b..."
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outPath=$(nix-build multiple-outputs.nix -A b --no-out-link)
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echo "output path is $outPath"
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[ "$(cat "$outPath"/file)" = "success" ]
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# Test nix-build on a derivation with multiple outputs.
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nix-build multiple-outputs.nix -A a -o $TEST_ROOT/result
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[ "$(cat $TEST_ROOT/result-first/file)" = "first" ]
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[ "$(cat $TEST_ROOT/result-second/file)" = "second" ]
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[ "$(cat $TEST_ROOT/result-second/link/file)" = "first" ]
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hash1=$(nix-store -q --hash $TEST_ROOT/result-second)
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# Delete one of the outputs and rebuild it. This will cause a hash
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# rewrite.
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nix-store --delete $TEST_ROOT/result-second --ignore-liveness
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nix-build multiple-outputs.nix -A a -o $TEST_ROOT/result
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[ "$(cat $TEST_ROOT/result-second/file)" = "second" ]
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[ "$(cat $TEST_ROOT/result-second/link/file)" = "first" ]
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hash2=$(nix-store -q --hash $TEST_ROOT/result-second)
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[ "$hash1" = "$hash2" ]
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# Make sure that nix-build works on derivations with multiple outputs.
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echo "building a.first..."
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nix-build multiple-outputs.nix -A a.first --no-out-link
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# Cyclic outputs should be rejected.
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echo "building cyclic..."
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if nix-build multiple-outputs.nix -A cyclic --no-out-link; then
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echo "Cyclic outputs incorrectly accepted!"
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exit 1
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fi
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echo "collecting garbage..."
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rm $TEST_ROOT/result*
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nix-store --gc --option gc-keep-derivations true --option gc-keep-outputs true
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nix-store --gc --print-roots
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