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lix/tests/repair.sh
Guillaume Maudoux e9a4abdb5d Make --repair-path also repair corrupt optimised links
There already existed a smoke test for the link content length,
but it appears that there exists some corruptions pernicious enough
to replace the file content with zeros, and keeping the same length.

--repair-path now goes as far as checking the content of the link,
making it true to its name and actually repairing the path for such
coruption cases.
2022-01-11 11:57:45 +01:00

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source common.sh
needLocalStore "--repair needs a local store"
clearStore
path=$(nix-build dependencies.nix -o $TEST_ROOT/result)
path2=$(nix-store -qR $path | grep input-2)
nix-store --verify --check-contents -v
hash=$(nix-hash $path2)
# Corrupt a path and check whether nix-build --repair can fix it.
chmod u+w $path2
touch $path2/bad
(! nix-store --verify --check-contents -v)
# The path can be repaired by rebuilding the derivation.
nix-store --verify --check-contents --repair
(! [ -e $path2/bad ])
(! [ -w $path2 ])
nix-store --verify-path $path2
# Re-corrupt and delete the deriver. Now --verify --repair should
# not work.
chmod u+w $path2
touch $path2/bad
nix-store --delete $(nix-store -q --referrers-closure $(nix-store -qd $path2))
(! nix-store --verify --check-contents --repair)
nix-build dependencies.nix -o $TEST_ROOT/result --repair
if [ "$(nix-hash $path2)" != "$hash" -o -e $path2/bad ]; then
echo "path not repaired properly" >&2
exit 1
fi
# Corrupt a path that has a substitute and check whether nix-store
# --verify can fix it.
clearCache
nix copy --to file://$cacheDir $path
chmod u+w $path2
rm -rf $path2
nix-store --verify --check-contents --repair --substituters "file://$cacheDir" --no-require-sigs
if [ "$(nix-hash $path2)" != "$hash" -o -e $path2/bad ]; then
echo "path not repaired properly" >&2
exit 1
fi
# Check --verify-path and --repair-path.
nix-store --verify-path $path2
chmod u+w $path2
rm -rf $path2
if nix-store --verify-path $path2; then
echo "nix-store --verify-path succeeded unexpectedly" >&2
exit 1
fi
nix-store --repair-path $path2 --substituters "file://$cacheDir" --no-require-sigs
if [ "$(nix-hash $path2)" != "$hash" -o -e $path2/bad ]; then
echo "path not repaired properly" >&2
exit 1
fi
# Check that --repair-path also checks content of optimised symlinks (1/2)
nix-store --verify-path $path2
if (! nix-store --optimize); then
echo "nix-store --optimize failed to optimize the store" >&2
exit 1
fi
chmod u+w $path2/bar
echo 'rabrab' > $path2/bar # different length
if nix-store --verify-path $path2; then
echo "nix-store --verify-path did not detect .links file corruption" >&2
exit 1
fi
nix-store --repair-path $path2 --option auto-optimise-store true
if [ "$(nix-hash $path2)" != "$hash" -o "BAR" != "$(< $path2/bar)" ]; then
echo "path not repaired properly" >&2
exit 1
fi
# Check that --repair-path also checks content of optimised symlinks (2/2)
nix-store --verify-path $path2
if (! nix-store --optimize); then
echo "nix-store --optimize failed to optimize the store" >&2
exit 1
fi
chmod u+w $path2
chmod u+w $path2/bar
sed -e 's/./X/g' < $path2/bar > $path2/tmp # same length, different content.
cp $path2/tmp $path2/bar
rm $path2/tmp
if nix-store --verify-path $path2; then
echo "nix-store --verify-path did not detect .links file corruption" >&2
exit 1
fi
nix-store --repair-path $path2 --substituters "file://$cacheDir" --no-require-sigs --option auto-optimise-store true
if [ "$(nix-hash $path2)" != "$hash" -o "BAR" != "$(< $path2/bar)" ]; then
echo "path not repaired properly" >&2
exit 1
fi