git/t/t1404-update-ref-errors.sh
Patrick Steinhardt 3f87bb2c2b t1404: make D/F conflict tests compatible with reftable backend
Some of the tests in t1404 exercise whether Git correctly aborts
transactions when there is a directory/file conflict with ref names.
While these tests are all marked to require the "files" backend, they do
in fact apply to the "reftable" backend as well.

This may not make much sense on the surface: D/F conflicts only exist
because the "files" backend uses the filesystem to store loose refs, and
thus the restriction theoretically shouldn't apply to the "reftable"
backend. But for now, the "reftable" backend artificially restricts the
creation of such conflicting refs so that it is a drop-in replacement
for the "files" backend. This also ensures that the "reftable" backend
can easily be used on the server side without causing issues for clients
which only know to use the "files" backend.

The only difference between the "files" and "reftable" backends is a
slightly different error message. Adapt the tests to accomodate for this
difference and remove the REFFILES prerequisite so that we start testing
with both backends.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-02-15 10:12:30 -08:00

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#!/bin/sh
test_description='Test git update-ref error handling'
TEST_PASSES_SANITIZE_LEAK=true
. ./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" $create >input &&
test_must_fail git update-ref --stdin <input 2>output.err &&
test_grep -F "$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 &&
$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 &&
grep "fatal:\( cannot lock ref $SQ$addname$SQ:\)\? $SQ$delref$SQ exists; cannot create $SQ$addref$SQ" output.err &&
printf "%s\n" "$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 '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_done