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="$2" &&
git commit --allow-empty -m Initial &&
C=$(git rev-parse HEAD) &&
git commit --allow-empty -m Second &&
- D=$(git rev-parse HEAD)
-
+ D=$(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' '
git update-ref --stdin
'
+# 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 $Q$prefix/foo$Q: unable to resolve reference $Q$prefix/foo$Q
+ 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 $Q$prefix/foo$Q: 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 $Q$prefix/foo$Q: 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 $Q$prefix/foo$Q: 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 $Q$prefix/symref$Q: unable to resolve reference $Q$prefix/foo$Q
+ 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 $Q$prefix/symref$Q: 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 $Q$prefix/symref$Q: 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 $Q$prefix/symref$Q: 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 $Q$prefix/symref$Q: 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 $Q$prefix/symref$Q: 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 $Q$prefix/symref$Q: 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 $Q$prefix/symref$Q: 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 $Q$prefix/foo$Q: there is a non-empty directory $Q.git/$prefix/foo$Q blocking reference $Q$prefix/foo$Q
+ 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 $Q$prefix/foo$Q: unable to resolve reference $Q$prefix/foo$Q
+ 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 $Q$prefix/foo$Q: unable to resolve reference $Q$prefix/foo$Q: 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 $Q$prefix/foo$Q: unable to resolve reference $Q$prefix/foo$Q: 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 $Q$prefix/symref$Q: there is a non-empty directory $Q.git/$prefix/foo$Q blocking reference $Q$prefix/foo$Q
+ 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 $Q$prefix/symref$Q: unable to resolve reference $Q$prefix/foo$Q
+ 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 $Q$prefix/symref$Q: unable to resolve reference $Q$prefix/foo$Q: 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 $Q$prefix/symref$Q: unable to resolve reference $Q$prefix/foo$Q: 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_done