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Diffstat (limited to '')
| -rwxr-xr-x | t/t1404-update-ref-errors.sh | 635 |
1 files changed, 635 insertions, 0 deletions
diff --git a/t/t1404-update-ref-errors.sh b/t/t1404-update-ref-errors.sh new file mode 100755 index 0000000..2d142e5 --- /dev/null +++ b/t/t1404-update-ref-errors.sh @@ -0,0 +1,635 @@ +#!/bin/sh + +test_description='Test git update-ref error handling' +. ./test-lib.sh + +# Create some references, perhaps run pack-refs --all, then try to +# create some more references. Ensure that the second creation fails +# with the correct error message. +# Usage: test_update_rejected <before> <pack> <create> <error> +# <before> is a ws-separated list of refs to create before the test +# <pack> (true or false) tells whether to pack the refs before the test +# <create> is a list of variables to attempt creating +# <error> is a string to look for in the stderr of update-ref. +# All references are created in the namespace specified by the current +# value of $prefix. +test_update_rejected () { + before="$1" && + pack="$2" && + create="$3" && + error="$4" && + printf "create $prefix/%s $C\n" $before | + git update-ref --stdin && + git for-each-ref $prefix >unchanged && + if $pack + then + git pack-refs --all + fi && + printf "create $prefix/%s $C\n" $create >input && + test_must_fail git update-ref --stdin <input 2>output.err && + test_i18ngrep -F "$error" output.err && + git for-each-ref $prefix >actual && + test_cmp unchanged actual +} + +# Test adding and deleting D/F-conflicting references in a single +# transaction. +df_test() { + prefix="$1" + pack=: symadd=false symdel=false add_del=false addref= delref= + shift + while test $# -gt 0 + do + case "$1" in + --pack) + pack="git pack-refs --all" + shift + ;; + --sym-add) + # Perform the add via a symbolic reference + symadd=true + shift + ;; + --sym-del) + # Perform the del via a symbolic reference + symdel=true + shift + ;; + --del-add) + # Delete first reference then add second + add_del=false + delref="$prefix/r/$2" + addref="$prefix/r/$3" + shift 3 + ;; + --add-del) + # Add first reference then delete second + add_del=true + addref="$prefix/r/$2" + delref="$prefix/r/$3" + shift 3 + ;; + *) + echo 1>&2 "Extra args to df_test: $*" + return 1 + ;; + esac + done + git update-ref "$delref" $C && + if $symadd + then + addname="$prefix/s/symadd" && + git symbolic-ref "$addname" "$addref" + else + addname="$addref" + fi && + if $symdel + then + delname="$prefix/s/symdel" && + git symbolic-ref "$delname" "$delref" + else + delname="$delref" + fi && + cat >expected-err <<-EOF && + fatal: cannot lock ref $SQ$addname$SQ: $SQ$delref$SQ exists; cannot create $SQ$addref$SQ + EOF + $pack && + if $add_del + then + printf "%s\n" "create $addname $D" "delete $delname" + else + printf "%s\n" "delete $delname" "create $addname $D" + fi >commands && + test_must_fail git update-ref --stdin <commands 2>output.err && + test_i18ncmp expected-err output.err && + printf "%s\n" "$C $delref" >expected-refs && + git for-each-ref --format="%(objectname) %(refname)" $prefix/r >actual-refs && + test_cmp expected-refs actual-refs +} + +test_expect_success 'setup' ' + + git commit --allow-empty -m Initial && + C=$(git rev-parse HEAD) && + git commit --allow-empty -m Second && + D=$(git rev-parse HEAD) && + git commit --allow-empty -m Third && + E=$(git rev-parse HEAD) +' + +test_expect_success 'existing loose ref is a simple prefix of new' ' + + prefix=refs/1l && + test_update_rejected "a c e" false "b c/x d" \ + "$SQ$prefix/c$SQ exists; cannot create $SQ$prefix/c/x$SQ" + +' + +test_expect_success 'existing packed ref is a simple prefix of new' ' + + prefix=refs/1p && + test_update_rejected "a c e" true "b c/x d" \ + "$SQ$prefix/c$SQ exists; cannot create $SQ$prefix/c/x$SQ" + +' + +test_expect_success 'existing loose ref is a deeper prefix of new' ' + + prefix=refs/2l && + test_update_rejected "a c e" false "b c/x/y d" \ + "$SQ$prefix/c$SQ exists; cannot create $SQ$prefix/c/x/y$SQ" + +' + +test_expect_success 'existing packed ref is a deeper prefix of new' ' + + prefix=refs/2p && + test_update_rejected "a c e" true "b c/x/y d" \ + "$SQ$prefix/c$SQ exists; cannot create $SQ$prefix/c/x/y$SQ" + +' + +test_expect_success 'new ref is a simple prefix of existing loose' ' + + prefix=refs/3l && + test_update_rejected "a c/x e" false "b c d" \ + "$SQ$prefix/c/x$SQ exists; cannot create $SQ$prefix/c$SQ" + +' + +test_expect_success 'new ref is a simple prefix of existing packed' ' + + prefix=refs/3p && + test_update_rejected "a c/x e" true "b c d" \ + "$SQ$prefix/c/x$SQ exists; cannot create $SQ$prefix/c$SQ" + +' + +test_expect_success 'new ref is a deeper prefix of existing loose' ' + + prefix=refs/4l && + test_update_rejected "a c/x/y e" false "b c d" \ + "$SQ$prefix/c/x/y$SQ exists; cannot create $SQ$prefix/c$SQ" + +' + +test_expect_success 'new ref is a deeper prefix of existing packed' ' + + prefix=refs/4p && + test_update_rejected "a c/x/y e" true "b c d" \ + "$SQ$prefix/c/x/y$SQ exists; cannot create $SQ$prefix/c$SQ" + +' + +test_expect_success 'one new ref is a simple prefix of another' ' + + prefix=refs/5 && + test_update_rejected "a e" false "b c c/x d" \ + "cannot process $SQ$prefix/c$SQ and $SQ$prefix/c/x$SQ at the same time" + +' + +test_expect_success 'empty directory should not fool rev-parse' ' + prefix=refs/e-rev-parse && + git update-ref $prefix/foo $C && + git pack-refs --all && + mkdir -p .git/$prefix/foo/bar/baz && + echo "$C" >expected && + git rev-parse $prefix/foo >actual && + test_cmp expected actual +' + +test_expect_success 'empty directory should not fool for-each-ref' ' + prefix=refs/e-for-each-ref && + git update-ref $prefix/foo $C && + git for-each-ref $prefix >expected && + git pack-refs --all && + mkdir -p .git/$prefix/foo/bar/baz && + git for-each-ref $prefix >actual && + test_cmp expected actual +' + +test_expect_success 'empty directory should not fool create' ' + prefix=refs/e-create && + mkdir -p .git/$prefix/foo/bar/baz && + printf "create %s $C\n" $prefix/foo | + git update-ref --stdin +' + +test_expect_success 'empty directory should not fool verify' ' + prefix=refs/e-verify && + git update-ref $prefix/foo $C && + git pack-refs --all && + mkdir -p .git/$prefix/foo/bar/baz && + printf "verify %s $C\n" $prefix/foo | + git update-ref --stdin +' + +test_expect_success 'empty directory should not fool 1-arg update' ' + prefix=refs/e-update-1 && + git update-ref $prefix/foo $C && + git pack-refs --all && + mkdir -p .git/$prefix/foo/bar/baz && + printf "update %s $D\n" $prefix/foo | + git update-ref --stdin +' + +test_expect_success 'empty directory should not fool 2-arg update' ' + prefix=refs/e-update-2 && + git update-ref $prefix/foo $C && + git pack-refs --all && + mkdir -p .git/$prefix/foo/bar/baz && + printf "update %s $D $C\n" $prefix/foo | + git update-ref --stdin +' + +test_expect_success 'empty directory should not fool 0-arg delete' ' + prefix=refs/e-delete-0 && + git update-ref $prefix/foo $C && + git pack-refs --all && + mkdir -p .git/$prefix/foo/bar/baz && + printf "delete %s\n" $prefix/foo | + git update-ref --stdin +' + +test_expect_success 'empty directory should not fool 1-arg delete' ' + prefix=refs/e-delete-1 && + git update-ref $prefix/foo $C && + git pack-refs --all && + mkdir -p .git/$prefix/foo/bar/baz && + printf "delete %s $C\n" $prefix/foo | + git update-ref --stdin +' + +test_expect_success 'D/F conflict prevents add long + delete short' ' + df_test refs/df-al-ds --add-del foo/bar foo +' + +test_expect_success 'D/F conflict prevents add short + delete long' ' + df_test refs/df-as-dl --add-del foo foo/bar +' + +test_expect_success 'D/F conflict prevents delete long + add short' ' + df_test refs/df-dl-as --del-add foo/bar foo +' + +test_expect_success 'D/F conflict prevents delete short + add long' ' + df_test refs/df-ds-al --del-add foo foo/bar +' + +test_expect_success 'D/F conflict prevents add long + delete short packed' ' + df_test refs/df-al-dsp --pack --add-del foo/bar foo +' + +test_expect_success 'D/F conflict prevents add short + delete long packed' ' + df_test refs/df-as-dlp --pack --add-del foo foo/bar +' + +test_expect_success 'D/F conflict prevents delete long packed + add short' ' + df_test refs/df-dlp-as --pack --del-add foo/bar foo +' + +test_expect_success 'D/F conflict prevents delete short packed + add long' ' + df_test refs/df-dsp-al --pack --del-add foo foo/bar +' + +# Try some combinations involving symbolic refs... + +test_expect_success 'D/F conflict prevents indirect add long + delete short' ' + df_test refs/df-ial-ds --sym-add --add-del foo/bar foo +' + +test_expect_success 'D/F conflict prevents indirect add long + indirect delete short' ' + df_test refs/df-ial-ids --sym-add --sym-del --add-del foo/bar foo +' + +test_expect_success 'D/F conflict prevents indirect add short + indirect delete long' ' + df_test refs/df-ias-idl --sym-add --sym-del --add-del foo foo/bar +' + +test_expect_success 'D/F conflict prevents indirect delete long + indirect add short' ' + df_test refs/df-idl-ias --sym-add --sym-del --del-add foo/bar foo +' + +test_expect_success 'D/F conflict prevents indirect add long + delete short packed' ' + df_test refs/df-ial-dsp --sym-add --pack --add-del foo/bar foo +' + +test_expect_success 'D/F conflict prevents indirect add long + indirect delete short packed' ' + df_test refs/df-ial-idsp --sym-add --sym-del --pack --add-del foo/bar foo +' + +test_expect_success 'D/F conflict prevents add long + indirect delete short packed' ' + df_test refs/df-al-idsp --sym-del --pack --add-del foo/bar foo +' + +test_expect_success 'D/F conflict prevents indirect delete long packed + indirect add short' ' + df_test refs/df-idlp-ias --sym-add --sym-del --pack --del-add foo/bar foo +' + +# Test various errors when reading the old values of references... + +test_expect_success 'missing old value blocks update' ' + prefix=refs/missing-update && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/foo$SQ: unable to resolve reference $SQ$prefix/foo$SQ + EOF + printf "%s\n" "update $prefix/foo $E $D" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err +' + +test_expect_success 'incorrect old value blocks update' ' + prefix=refs/incorrect-update && + git update-ref $prefix/foo $C && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/foo$SQ: is at $C but expected $D + EOF + printf "%s\n" "update $prefix/foo $E $D" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err +' + +test_expect_success 'existing old value blocks create' ' + prefix=refs/existing-create && + git update-ref $prefix/foo $C && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/foo$SQ: reference already exists + EOF + printf "%s\n" "create $prefix/foo $E" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err +' + +test_expect_success 'incorrect old value blocks delete' ' + prefix=refs/incorrect-delete && + git update-ref $prefix/foo $C && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/foo$SQ: is at $C but expected $D + EOF + printf "%s\n" "delete $prefix/foo $D" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err +' + +test_expect_success 'missing old value blocks indirect update' ' + prefix=refs/missing-indirect-update && + git symbolic-ref $prefix/symref $prefix/foo && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/symref$SQ: unable to resolve reference $SQ$prefix/foo$SQ + EOF + printf "%s\n" "update $prefix/symref $E $D" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err +' + +test_expect_success 'incorrect old value blocks indirect update' ' + prefix=refs/incorrect-indirect-update && + git symbolic-ref $prefix/symref $prefix/foo && + git update-ref $prefix/foo $C && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/symref$SQ: is at $C but expected $D + EOF + printf "%s\n" "update $prefix/symref $E $D" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err +' + +test_expect_success 'existing old value blocks indirect create' ' + prefix=refs/existing-indirect-create && + git symbolic-ref $prefix/symref $prefix/foo && + git update-ref $prefix/foo $C && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/symref$SQ: reference already exists + EOF + printf "%s\n" "create $prefix/symref $E" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err +' + +test_expect_success 'incorrect old value blocks indirect delete' ' + prefix=refs/incorrect-indirect-delete && + git symbolic-ref $prefix/symref $prefix/foo && + git update-ref $prefix/foo $C && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/symref$SQ: is at $C but expected $D + EOF + printf "%s\n" "delete $prefix/symref $D" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err +' + +test_expect_success 'missing old value blocks indirect no-deref update' ' + prefix=refs/missing-noderef-update && + git symbolic-ref $prefix/symref $prefix/foo && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/symref$SQ: reference is missing but expected $D + EOF + printf "%s\n" "option no-deref" "update $prefix/symref $E $D" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err +' + +test_expect_success 'incorrect old value blocks indirect no-deref update' ' + prefix=refs/incorrect-noderef-update && + git symbolic-ref $prefix/symref $prefix/foo && + git update-ref $prefix/foo $C && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/symref$SQ: is at $C but expected $D + EOF + printf "%s\n" "option no-deref" "update $prefix/symref $E $D" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err +' + +test_expect_success 'existing old value blocks indirect no-deref create' ' + prefix=refs/existing-noderef-create && + git symbolic-ref $prefix/symref $prefix/foo && + git update-ref $prefix/foo $C && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/symref$SQ: reference already exists + EOF + printf "%s\n" "option no-deref" "create $prefix/symref $E" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err +' + +test_expect_success 'incorrect old value blocks indirect no-deref delete' ' + prefix=refs/incorrect-noderef-delete && + git symbolic-ref $prefix/symref $prefix/foo && + git update-ref $prefix/foo $C && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/symref$SQ: is at $C but expected $D + EOF + printf "%s\n" "option no-deref" "delete $prefix/symref $D" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err +' + +test_expect_success 'non-empty directory blocks create' ' + prefix=refs/ne-create && + mkdir -p .git/$prefix/foo/bar && + : >.git/$prefix/foo/bar/baz.lock && + test_when_finished "rm -f .git/$prefix/foo/bar/baz.lock" && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/foo$SQ: there is a non-empty directory $SQ.git/$prefix/foo$SQ blocking reference $SQ$prefix/foo$SQ + EOF + printf "%s\n" "update $prefix/foo $C" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/foo$SQ: unable to resolve reference $SQ$prefix/foo$SQ + EOF + printf "%s\n" "update $prefix/foo $D $C" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err +' + +test_expect_success 'broken reference blocks create' ' + prefix=refs/broken-create && + mkdir -p .git/$prefix && + echo "gobbledigook" >.git/$prefix/foo && + test_when_finished "rm -f .git/$prefix/foo" && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/foo$SQ: unable to resolve reference $SQ$prefix/foo$SQ: reference broken + EOF + printf "%s\n" "update $prefix/foo $C" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/foo$SQ: unable to resolve reference $SQ$prefix/foo$SQ: reference broken + EOF + printf "%s\n" "update $prefix/foo $D $C" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err +' + +test_expect_success 'non-empty directory blocks indirect create' ' + prefix=refs/ne-indirect-create && + git symbolic-ref $prefix/symref $prefix/foo && + mkdir -p .git/$prefix/foo/bar && + : >.git/$prefix/foo/bar/baz.lock && + test_when_finished "rm -f .git/$prefix/foo/bar/baz.lock" && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/symref$SQ: there is a non-empty directory $SQ.git/$prefix/foo$SQ blocking reference $SQ$prefix/foo$SQ + EOF + printf "%s\n" "update $prefix/symref $C" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/symref$SQ: unable to resolve reference $SQ$prefix/foo$SQ + EOF + printf "%s\n" "update $prefix/symref $D $C" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err +' + +test_expect_success 'broken reference blocks indirect create' ' + prefix=refs/broken-indirect-create && + git symbolic-ref $prefix/symref $prefix/foo && + echo "gobbledigook" >.git/$prefix/foo && + test_when_finished "rm -f .git/$prefix/foo" && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/symref$SQ: unable to resolve reference $SQ$prefix/foo$SQ: reference broken + EOF + printf "%s\n" "update $prefix/symref $C" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err && + cat >expected <<-EOF && + fatal: cannot lock ref $SQ$prefix/symref$SQ: unable to resolve reference $SQ$prefix/foo$SQ: reference broken + EOF + printf "%s\n" "update $prefix/symref $D $C" | + test_must_fail git update-ref --stdin 2>output.err && + test_cmp expected output.err +' + +test_expect_success 'no bogus intermediate values during delete' ' + prefix=refs/slow-transaction && + # Set up a reference with differing loose and packed versions: + git update-ref $prefix/foo $C && + git pack-refs --all && + git update-ref $prefix/foo $D && + git for-each-ref $prefix >unchanged && + # Now try to update the reference, but hold the `packed-refs` lock + # for a while to see what happens while the process is blocked: + : >.git/packed-refs.lock && + test_when_finished "rm -f .git/packed-refs.lock" && + { + # Note: the following command is intentionally run in the + # background. We increase the timeout so that `update-ref` + # attempts to acquire the `packed-refs` lock for much longer + # than it takes for us to do the check then delete it: + git -c core.packedrefstimeout=30000 update-ref -d $prefix/foo & + } && + pid2=$! && + # Give update-ref plenty of time to get to the point where it tries + # to lock packed-refs: + sleep 1 && + # Make sure that update-ref did not complete despite the lock: + kill -0 $pid2 && + # Verify that the reference still has its old value: + sha1=$(git rev-parse --verify --quiet $prefix/foo || echo undefined) && + case "$sha1" in + $D) + # This is what we hope for; it means that nothing + # user-visible has changed yet. + : ;; + undefined) + # This is not correct; it means the deletion has happened + # already even though update-ref should not have been + # able to acquire the lock yet. + echo "$prefix/foo deleted prematurely" && + break + ;; + $C) + # This value should never be seen. Probably the loose + # reference has been deleted but the packed reference + # is still there: + echo "$prefix/foo incorrectly observed to be C" && + break + ;; + *) + # WTF? + echo "unexpected value observed for $prefix/foo: $sha1" && + break + ;; + esac >out && + rm -f .git/packed-refs.lock && + wait $pid2 && + test_must_be_empty out && + test_must_fail git rev-parse --verify --quiet $prefix/foo +' + +test_expect_success 'delete fails cleanly if packed-refs file is locked' ' + prefix=refs/locked-packed-refs && + # Set up a reference with differing loose and packed versions: + git update-ref $prefix/foo $C && + git pack-refs --all && + git update-ref $prefix/foo $D && + git for-each-ref $prefix >unchanged && + # Now try to delete it while the `packed-refs` lock is held: + : >.git/packed-refs.lock && + test_when_finished "rm -f .git/packed-refs.lock" && + test_must_fail git update-ref -d $prefix/foo >out 2>err && + git for-each-ref $prefix >actual && + test_i18ngrep "Unable to create $SQ.*packed-refs.lock$SQ: " err && + test_cmp unchanged actual +' + +test_expect_success 'delete fails cleanly if packed-refs.new write fails' ' + # Setup and expectations are similar to the test above. + prefix=refs/failed-packed-refs && + git update-ref $prefix/foo $C && + git pack-refs --all && + git update-ref $prefix/foo $D && + git for-each-ref $prefix >unchanged && + # This should not happen in practice, but it is an easy way to get a + # reliable error (we open with create_tempfile(), which uses O_EXCL). + : >.git/packed-refs.new && + test_when_finished "rm -f .git/packed-refs.new" && + test_must_fail git update-ref -d $prefix/foo && + git for-each-ref $prefix >actual && + test_cmp unchanged actual +' + +test_done |