git/t/t3920-crlf-messages.sh

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ref-filter: handle CRLF at end-of-line more gracefully The ref-filter code does not correctly handle commit or tag messages that use CRLF as the line terminator. Such messages can be created with the `--cleanup=verbatim` option of `git commit` and `git tag`, or by using `git commit-tree` directly. The function `find_subpos` in ref-filter.c looks for two consecutive LFs to find the end of the subject line, a sequence which is absent in messages using CRLF. This results in the whole message being parsed as the subject line (`%(contents:subject)`), and the body of the message (`%(contents:body)`) being empty. Moreover, in `copy_subject`, which wants to return the subject as a single line, '\n' is replaced by space, but '\r' is untouched. This impacts the output of `git branch`, `git tag` and `git for-each-ref`. This behaviour is a regression for `git branch --verbose`, which bisects down to 949af0684c (branch: use ref-filter printing APIs, 2017-01-10). Adjust the ref-filter code to be more lenient by hardening the logic in `copy_subject` and `find_subpos` to correctly parse messages containing CRLF. Add a new test script, 't3920-crlf-messages.sh', to test the behaviour of commands using either the ref-filter or the pretty APIs with messages using CRLF line endings. The function `test_crlf_subject_body_and_contents` can be used to test that the `--format` option of `branch`, `tag`, `for-each-ref`, `log` and `show` correctly displays the subject, body and raw content of commit and tag messages using CRLF. Test the output of `branch`, `tag` and `for-each-ref` with such commits. Helped-by: Junio C Hamano <gitster@pobox.com> Helped-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-10-29 15:48:28 +03:00
#!/bin/sh
test_description='Test ref-filter and pretty APIs for commit and tag messages using CRLF'
. ./test-lib.sh
LIB_CRLF_BRANCHES=""
create_crlf_ref () {
branch="$1" &&
cat >.crlf-orig-$branch.txt &&
cat .crlf-orig-$branch.txt | append_cr >.crlf-message-$branch.txt &&
grep 'Subject' .crlf-orig-$branch.txt | tr '\n' ' ' | sed 's/[ ]*$//' | tr -d '\n' >.crlf-subject-$branch.txt &&
grep 'Body' .crlf-message-$branch.txt >.crlf-body-$branch.txt || true &&
LIB_CRLF_BRANCHES="${LIB_CRLF_BRANCHES} ${branch}" &&
test_tick &&
hash=$(git commit-tree HEAD^{tree} -p HEAD -F .crlf-message-${branch}.txt) &&
git branch ${branch} ${hash} &&
git tag tag-${branch} ${branch} -F .crlf-message-${branch}.txt --cleanup=verbatim
}
create_crlf_refs () {
create_crlf_ref crlf <<-\EOF &&
Subject first line
Body first line
Body second line
EOF
create_crlf_ref crlf-empty-lines-after-subject <<-\EOF &&
Subject first line
Body first line
Body second line
EOF
create_crlf_ref crlf-two-line-subject <<-\EOF &&
Subject first line
Subject second line
Body first line
Body second line
EOF
create_crlf_ref crlf-two-line-subject-no-body <<-\EOF &&
Subject first line
Subject second line
EOF
create_crlf_ref crlf-two-line-subject-no-body-trailing-newline <<-\EOF
Subject first line
Subject second line
EOF
}
test_crlf_subject_body_and_contents() {
command_and_args="$@" &&
command=$1 &&
if test ${command} = "branch" || test ${command} = "for-each-ref" || test ${command} = "tag"
then
atoms="(contents:subject) (contents:body) (contents)"
elif test ${command} = "log" || test ${command} = "show"
then
atoms="s b B"
fi &&
files="subject body message" &&
while test -n "${atoms}"
do
set ${atoms} && atom=$1 && shift && atoms="$*" &&
set ${files} && file=$1 && shift && files="$*" &&
test_expect_success "${command}: --format='%${atom}' works with messages using CRLF" "
rm -f expect &&
for ref in ${LIB_CRLF_BRANCHES}
do
cat .crlf-${file}-\"\${ref}\".txt >>expect &&
printf \"\n\" >>expect
done &&
git $command_and_args --format=\"%${atom}\" >actual &&
test_cmp expect actual
"
done
}
test_expect_success 'Setup refs with commit and tag messages using CRLF' '
test_commit inital &&
create_crlf_refs
'
test_expect_success 'branch: --verbose works with messages using CRLF' '
rm -f expect &&
for branch in $LIB_CRLF_BRANCHES
do
printf " " >>expect &&
cat .crlf-subject-${branch}.txt >>expect &&
printf "\n" >>expect
done &&
git branch -v >tmp &&
# Remove first two columns, and the line for the currently checked out branch
current=$(git branch --show-current) &&
grep -v $current <tmp | awk "{\$1=\$2=\"\"}1" >actual &&
test_cmp expect actual
'
test_crlf_subject_body_and_contents branch --list crlf*
test_crlf_subject_body_and_contents tag --list tag-crlf*
test_crlf_subject_body_and_contents for-each-ref refs/heads/crlf*
test_expect_success 'log: --oneline works with messages using CRLF' '
for branch in $LIB_CRLF_BRANCHES
do
cat .crlf-subject-${branch}.txt >expect &&
printf "\n" >>expect &&
git log --oneline -1 ${branch} >tmp-branch &&
git log --oneline -1 tag-${branch} >tmp-tag &&
cut -d" " -f2- <tmp-branch >actual-branch &&
cut -d" " -f2- <tmp-tag >actual-tag &&
test_cmp expect actual-branch &&
test_cmp expect actual-tag || return 1
done
'
test_crlf_subject_body_and_contents log --all --reverse --grep Subject
test_crlf_subject_body_and_contents show $LIB_CRLF_BRANCHES
ref-filter: handle CRLF at end-of-line more gracefully The ref-filter code does not correctly handle commit or tag messages that use CRLF as the line terminator. Such messages can be created with the `--cleanup=verbatim` option of `git commit` and `git tag`, or by using `git commit-tree` directly. The function `find_subpos` in ref-filter.c looks for two consecutive LFs to find the end of the subject line, a sequence which is absent in messages using CRLF. This results in the whole message being parsed as the subject line (`%(contents:subject)`), and the body of the message (`%(contents:body)`) being empty. Moreover, in `copy_subject`, which wants to return the subject as a single line, '\n' is replaced by space, but '\r' is untouched. This impacts the output of `git branch`, `git tag` and `git for-each-ref`. This behaviour is a regression for `git branch --verbose`, which bisects down to 949af0684c (branch: use ref-filter printing APIs, 2017-01-10). Adjust the ref-filter code to be more lenient by hardening the logic in `copy_subject` and `find_subpos` to correctly parse messages containing CRLF. Add a new test script, 't3920-crlf-messages.sh', to test the behaviour of commands using either the ref-filter or the pretty APIs with messages using CRLF line endings. The function `test_crlf_subject_body_and_contents` can be used to test that the `--format` option of `branch`, `tag`, `for-each-ref`, `log` and `show` correctly displays the subject, body and raw content of commit and tag messages using CRLF. Test the output of `branch`, `tag` and `for-each-ref` with such commits. Helped-by: Junio C Hamano <gitster@pobox.com> Helped-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-10-29 15:48:28 +03:00
test_done