tvl-depot/third_party/git/t/lib-rebase.sh
Vincent Ambo f4609b896f merge(3p/git): Merge git subtree at v2.29.2
This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb
2020-11-21 19:45:56 +01:00

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# Helper functions used by interactive rebase tests.
# After setting the fake editor with this function, you can
#
# - override the commit message with $FAKE_COMMIT_MESSAGE
# - amend the commit message with $FAKE_COMMIT_AMEND
# - check that non-commit messages have a certain line count with $EXPECT_COUNT
# - check the commit count in the commit message header with $EXPECT_HEADER_COUNT
# - rewrite a rebase -i script as directed by $FAKE_LINES.
# $FAKE_LINES consists of a sequence of words separated by spaces.
# The following word combinations are possible:
#
# "<lineno>" -- add a "pick" line with the SHA1 taken from the
# specified line.
#
# "<cmd> <lineno>" -- add a line with the specified command
# ("pick", "squash", "fixup", "edit", "reword" or "drop") and the
# SHA1 taken from the specified line.
#
# "exec_cmd_with_args" -- add an "exec cmd with args" line.
#
# "#" -- Add a comment line.
#
# ">" -- Add a blank line.
set_fake_editor () {
write_script fake-editor.sh <<-\EOF
case "$1" in
*/COMMIT_EDITMSG)
test -z "$EXPECT_HEADER_COUNT" ||
test "$EXPECT_HEADER_COUNT" = "$(sed -n '1s/^# This is a combination of \(.*\) commits\./\1/p' < "$1")" ||
test "# # GETTEXT POISON #" = "$(sed -n '1p' < "$1")" ||
exit
test -z "$FAKE_COMMIT_MESSAGE" || echo "$FAKE_COMMIT_MESSAGE" > "$1"
test -z "$FAKE_COMMIT_AMEND" || echo "$FAKE_COMMIT_AMEND" >> "$1"
exit
;;
esac
test -z "$EXPECT_COUNT" ||
test "$EXPECT_COUNT" = $(sed -e '/^#/d' -e '/^$/d' < "$1" | wc -l) ||
exit
test -z "$FAKE_LINES" && exit
grep -v '^#' < "$1" > "$1".tmp
rm -f "$1"
echo 'rebase -i script before editing:'
cat "$1".tmp
action=\&
for line in $FAKE_LINES; do
case $line in
pick|p|squash|s|fixup|f|edit|e|reword|r|drop|d|label|l|reset|r|merge|m)
action="$line";;
exec_*|x_*|break|b)
echo "$line" | sed 's/_/ /g' >> "$1";;
"#")
echo '# comment' >> "$1";;
">")
echo >> "$1";;
bad)
action="badcmd";;
fakesha)
test \& != "$action" || action=pick
echo "$action XXXXXXX False commit" >> "$1"
action=pick;;
*)
sed -n "${line}s/^[a-z][a-z]*/$action/p" < "$1".tmp >> "$1"
action=\&;;
esac
done
echo 'rebase -i script after editing:'
cat "$1"
EOF
test_set_editor "$(pwd)/fake-editor.sh"
}
# After set_cat_todo_editor, rebase -i will write the todo list (ignoring
# blank lines and comments) to stdout, and exit failure (so you should run
# it with test_must_fail). This can be used to verify the expected user
# experience, for todo list changes that do not affect the outcome of
# rebase; or as an extra check in addition to checking the outcome.
set_cat_todo_editor () {
write_script fake-editor.sh <<-\EOF
grep "^[^#]" "$1"
exit 1
EOF
test_set_editor "$(pwd)/fake-editor.sh"
}
# checks that the revisions in "$2" represent a linear range with the
# subjects in "$1"
test_linear_range () {
revlist_merges=$(git rev-list --merges "$2") &&
test -z "$revlist_merges" &&
expected=$1
set -- $(git log --reverse --format=%s "$2")
test "$expected" = "$*"
}
reset_rebase () {
test_might_fail git rebase --abort &&
git reset --hard &&
git clean -f
}
cherry_pick () {
git cherry-pick -n "$2" &&
git commit -m "$1" &&
git tag "$1"
}
revert () {
git revert -n "$2" &&
git commit -m "$1" &&
git tag "$1"
}
make_empty () {
git commit --allow-empty -m "$1" &&
git tag "$1"
}
# Call this (inside test_expect_success) at the end of a test file to
# check that no tests have changed editor related environment
# variables or config settings
test_editor_unchanged () {
# We're only interested in exported variables hence 'sh -c'
sh -c 'cat >actual <<-EOF
EDITOR=$EDITOR
FAKE_COMMIT_AMEND=$FAKE_COMMIT_AMEND
FAKE_COMMIT_MESSAGE=$FAKE_COMMIT_MESSAGE
FAKE_LINES=$FAKE_LINES
GIT_EDITOR=$GIT_EDITOR
GIT_SEQUENCE_EDITOR=$GIT_SEQUENCE_EDITOR
core.editor=$(git config core.editor)
sequence.editor=$(git config sequence.editor)
EOF'
cat >expect <<-\EOF
EDITOR=:
FAKE_COMMIT_AMEND=
FAKE_COMMIT_MESSAGE=
FAKE_LINES=
GIT_EDITOR=
GIT_SEQUENCE_EDITOR=
core.editor=
sequence.editor=
EOF
test_cmp expect actual
}