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lix/tests/multiple-outputs.sh
John Ericson c11836126b Harden tests' bash
Use `set -u` and `set -o pipefail` to catch accidental mistakes and
failures more strongly.

 - `set -u` catches the use of undefined variables
 - `set -o pipefail` catches failures (like `set -e`) earlier in the
   pipeline.

This makes the tests a bit more robust. It is nice to read code not
worrying about these spurious success paths (via uncaught) errors
undermining the tests. Indeed, I caught some bugs doing this.

There are a few tests where we run a command that should fail, and then
search its output to make sure the failure message is one that we
expect. Before, since the `grep` was the last command in the pipeline
the exit code of those failing programs was silently ignored. Now with
`set -o pipefail` it won't be, and we have to do something so the
expected failure doesn't accidentally fail the test.

To do that we use `expect` and a new `expectStderr` to check for the
exact failing exit code. See the comments on each for why.

`grep -q` is replaced with `grepQuiet`, see the comments on that
function for why.

`grep -v` when we just want the exit code is replaced with `grepInverse,
see the comments on that function for why.

`grep -q -v` together is, surprise surprise, replaced with
`grepQuietInverse`, which is both combined.

Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
2023-03-08 10:26:30 -05:00

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source common.sh
clearStore
rm -f $TEST_ROOT/result*
# Test whether the output names match our expectations
outPath=$(nix-instantiate multiple-outputs.nix --eval -A nameCheck.out.outPath)
[ "$(echo "$outPath" | sed -E 's_^".*/[^-/]*-([^/]*)"$_\1_')" = "multiple-outputs-a" ]
outPath=$(nix-instantiate multiple-outputs.nix --eval -A nameCheck.dev.outPath)
[ "$(echo "$outPath" | sed -E 's_^".*/[^-/]*-([^/]*)"$_\1_')" = "multiple-outputs-a-dev" ]
# Test whether read-only evaluation works when referring to the
# drvPath attribute.
echo "evaluating c..."
#drvPath=$(nix-instantiate multiple-outputs.nix -A c --readonly-mode)
# And check whether the resulting derivation explicitly depends on all
# outputs.
drvPath=$(nix-instantiate multiple-outputs.nix -A c)
#[ "$drvPath" = "$drvPath2" ]
grepQuiet 'multiple-outputs-a.drv",\["first","second"\]' $drvPath
grepQuiet 'multiple-outputs-b.drv",\["out"\]' $drvPath
# While we're at it, test the unsafeDiscardOutputDependency primop.
outPath=$(nix-build multiple-outputs.nix -A d --no-out-link)
drvPath=$(cat $outPath/drv)
outPath=$(nix-store -q $drvPath)
(! [ -e "$outPath" ])
# Do a build of something that depends on a derivation with multiple
# outputs.
echo "building b..."
outPath=$(nix-build multiple-outputs.nix -A b --no-out-link)
echo "output path is $outPath"
[ "$(cat "$outPath"/file)" = "success" ]
# Test nix-build on a derivation with multiple outputs.
outPath1=$(nix-build multiple-outputs.nix -A a -o $TEST_ROOT/result)
[ -e $TEST_ROOT/result-first ]
(! [ -e $TEST_ROOT/result-second ])
nix-build multiple-outputs.nix -A a.all -o $TEST_ROOT/result
[ "$(cat $TEST_ROOT/result-first/file)" = "first" ]
[ "$(cat $TEST_ROOT/result-second/file)" = "second" ]
[ "$(cat $TEST_ROOT/result-second/link/file)" = "first" ]
hash1=$(nix-store -q --hash $TEST_ROOT/result-second)
outPath2=$(nix-build $(nix-instantiate multiple-outputs.nix -A a) --no-out-link)
[[ $outPath1 = $outPath2 ]]
outPath2=$(nix-build $(nix-instantiate multiple-outputs.nix -A a.first) --no-out-link)
[[ $outPath1 = $outPath2 ]]
outPath2=$(nix-build $(nix-instantiate multiple-outputs.nix -A a.second) --no-out-link)
[[ $(cat $outPath2/file) = second ]]
[[ $(nix-build $(nix-instantiate multiple-outputs.nix -A a.all) --no-out-link | wc -l) -eq 2 ]]
# Delete one of the outputs and rebuild it. This will cause a hash
# rewrite.
env -u NIX_REMOTE nix store delete $TEST_ROOT/result-second --ignore-liveness
nix-build multiple-outputs.nix -A a.all -o $TEST_ROOT/result
[ "$(cat $TEST_ROOT/result-second/file)" = "second" ]
[ "$(cat $TEST_ROOT/result-second/link/file)" = "first" ]
hash2=$(nix-store -q --hash $TEST_ROOT/result-second)
[ "$hash1" = "$hash2" ]
# Make sure that nix-build works on derivations with multiple outputs.
echo "building a.first..."
nix-build multiple-outputs.nix -A a.first --no-out-link
# Cyclic outputs should be rejected.
echo "building cyclic..."
if nix-build multiple-outputs.nix -A cyclic --no-out-link; then
echo "Cyclic outputs incorrectly accepted!"
exit 1
fi
# Do a GC. This should leave an empty store.
echo "collecting garbage..."
rm $TEST_ROOT/result*
nix-store --gc --keep-derivations --keep-outputs
nix-store --gc --print-roots
rm -rf $NIX_STORE_DIR/.links
rmdir $NIX_STORE_DIR
expect 1 nix build -f multiple-outputs.nix invalid-output-name-1 2>&1 | grep 'contains illegal character'
expect 1 nix build -f multiple-outputs.nix invalid-output-name-2 2>&1 | grep 'contains illegal character'