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
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#!/bin/sh
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test_description='Test ref-filter and pretty APIs for commit and tag messages using CRLF'
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. ./test-lib.sh
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LIB_CRLF_BRANCHES=""
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create_crlf_ref () {
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branch="$1" &&
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cat >.crlf-orig-$branch.txt &&
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cat .crlf-orig-$branch.txt | append_cr >.crlf-message-$branch.txt &&
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grep 'Subject' .crlf-orig-$branch.txt | tr '\n' ' ' | sed 's/[ ]*$//' | tr -d '\n' >.crlf-subject-$branch.txt &&
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grep 'Body' .crlf-message-$branch.txt >.crlf-body-$branch.txt || true &&
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LIB_CRLF_BRANCHES="${LIB_CRLF_BRANCHES} ${branch}" &&
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test_tick &&
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hash=$(git commit-tree HEAD^{tree} -p HEAD -F .crlf-message-${branch}.txt) &&
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git branch ${branch} ${hash} &&
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git tag tag-${branch} ${branch} -F .crlf-message-${branch}.txt --cleanup=verbatim
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}
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create_crlf_refs () {
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create_crlf_ref crlf <<-\EOF &&
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Subject first line
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Body first line
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Body second line
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EOF
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create_crlf_ref crlf-empty-lines-after-subject <<-\EOF &&
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Subject first line
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Body first line
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Body second line
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EOF
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create_crlf_ref crlf-two-line-subject <<-\EOF &&
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Subject first line
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Subject second line
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Body first line
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Body second line
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EOF
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create_crlf_ref crlf-two-line-subject-no-body <<-\EOF &&
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Subject first line
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Subject second line
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EOF
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create_crlf_ref crlf-two-line-subject-no-body-trailing-newline <<-\EOF
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Subject first line
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Subject second line
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EOF
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}
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test_crlf_subject_body_and_contents() {
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command_and_args="$@" &&
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command=$1 &&
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if test ${command} = "branch" || test ${command} = "for-each-ref" || test ${command} = "tag"
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then
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atoms="(contents:subject) (contents:body) (contents)"
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elif test ${command} = "log" || test ${command} = "show"
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then
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atoms="s b B"
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fi &&
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files="subject body message" &&
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while test -n "${atoms}"
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do
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set ${atoms} && atom=$1 && shift && atoms="$*" &&
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set ${files} && file=$1 && shift && files="$*" &&
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test_expect_success "${command}: --format='%${atom}' works with messages using CRLF" "
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rm -f expect &&
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for ref in ${LIB_CRLF_BRANCHES}
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do
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cat .crlf-${file}-\"\${ref}\".txt >>expect &&
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printf \"\n\" >>expect
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done &&
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git $command_and_args --format=\"%${atom}\" >actual &&
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test_cmp expect actual
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"
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done
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}
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test_expect_success 'Setup refs with commit and tag messages using CRLF' '
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test_commit inital &&
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create_crlf_refs
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'
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test_expect_success 'branch: --verbose works with messages using CRLF' '
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rm -f expect &&
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for branch in $LIB_CRLF_BRANCHES
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do
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printf " " >>expect &&
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cat .crlf-subject-${branch}.txt >>expect &&
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printf "\n" >>expect
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done &&
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git branch -v >tmp &&
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# Remove first two columns, and the line for the currently checked out branch
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current=$(git branch --show-current) &&
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grep -v $current <tmp | awk "{\$1=\$2=\"\"}1" >actual &&
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test_cmp expect actual
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'
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test_crlf_subject_body_and_contents branch --list crlf*
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test_crlf_subject_body_and_contents tag --list tag-crlf*
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test_crlf_subject_body_and_contents for-each-ref refs/heads/crlf*
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2020-10-29 15:48:29 +03:00
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test_expect_success 'log: --oneline works with messages using CRLF' '
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for branch in $LIB_CRLF_BRANCHES
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do
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cat .crlf-subject-${branch}.txt >expect &&
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printf "\n" >>expect &&
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git log --oneline -1 ${branch} >tmp-branch &&
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git log --oneline -1 tag-${branch} >tmp-tag &&
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cut -d" " -f2- <tmp-branch >actual-branch &&
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cut -d" " -f2- <tmp-tag >actual-tag &&
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test_cmp expect actual-branch &&
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test_cmp expect actual-tag || return 1
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done
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'
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test_crlf_subject_body_and_contents log --all --reverse --grep Subject
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test_crlf_subject_body_and_contents show $LIB_CRLF_BRANCHES
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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
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test_done
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