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git/t/t5407-post-rewrite-hook.sh
Elijah Newren 10cdb9f38a rebase: rename the two primary rebase backends
Two related changes, with separate rationale for each:

Rename the 'interactive' backend to 'merge' because:
  * 'interactive' as a name caused confusion; this backend has been used
    for many kinds of non-interactive rebases, and will probably be used
    in the future for more non-interactive rebases than interactive ones
    given that we are making it the default.
  * 'interactive' is not the underlying strategy; merging is.
  * the directory where state is stored is not called
    .git/rebase-interactive but .git/rebase-merge.

Rename the 'am' backend to 'apply' because:
  * Few users are familiar with git-am as a reference point.
  * Related to the above, the name 'am' makes sentences in the
    documentation harder for users to read and comprehend (they may read
    it as the verb from "I am"); avoiding this difficult places a large
    burden on anyone writing documentation about this backend to be very
    careful with quoting and sentence structure and often forces
    annoying redundancy to try to avoid such problems.
  * Users stumble over pronunciation ("am" as in "I am a person not a
    backend" or "am" as in "the first and thirteenth letters in the
    alphabet in order are "A-M"); this may drive confusion when one user
    tries to explain to another what they are doing.
  * While "am" is the tool driving this backend, the tool driving git-am
    is git-apply, and since we are driving towards lower-level tools
    for the naming of the merge backend we may as well do so here too.
  * The directory where state is stored has never been called
    .git/rebase-am, it was always called .git/rebase-apply.

For all the reasons listed above:
  * Modify the documentation to refer to the backends with the new names
  * Provide a brief note in the documentation connecting the new names
    to the old names in case users run across the old names anywhere
    (e.g. in old release notes or older versions of the documentation)
  * Change the (new) --am command line flag to --apply
  * Rename some enums, variables, and functions to reinforce the new
    backend names for us as well.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-16 15:40:42 -08:00

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#!/bin/sh
#
# Copyright (c) 2010 Thomas Rast
#
test_description='Test the post-rewrite hook.'
. ./test-lib.sh
test_expect_success 'setup' '
test_commit A foo A &&
test_commit B foo B &&
test_commit C foo C &&
test_commit D foo D &&
git checkout A^0 &&
test_commit E bar E &&
test_commit F foo F &&
git checkout master
'
mkdir .git/hooks
cat >.git/hooks/post-rewrite <<EOF
#!/bin/sh
echo \$@ > "$TRASH_DIRECTORY"/post-rewrite.args
cat > "$TRASH_DIRECTORY"/post-rewrite.data
EOF
chmod u+x .git/hooks/post-rewrite
clear_hook_input () {
rm -f post-rewrite.args post-rewrite.data
}
verify_hook_input () {
test_cmp expected.args "$TRASH_DIRECTORY"/post-rewrite.args &&
test_cmp expected.data "$TRASH_DIRECTORY"/post-rewrite.data
}
test_expect_success 'git commit --amend' '
clear_hook_input &&
echo "D new message" > newmsg &&
oldsha=$(git rev-parse HEAD^0) &&
git commit -Fnewmsg --amend &&
echo amend > expected.args &&
echo $oldsha $(git rev-parse HEAD^0) > expected.data &&
verify_hook_input
'
test_expect_success 'git commit --amend --no-post-rewrite' '
clear_hook_input &&
echo "D new message again" > newmsg &&
git commit --no-post-rewrite -Fnewmsg --amend &&
test ! -f post-rewrite.args &&
test ! -f post-rewrite.data
'
test_expect_success 'git rebase --apply' '
git reset --hard D &&
clear_hook_input &&
test_must_fail git rebase --apply --onto A B &&
echo C > foo &&
git add foo &&
git rebase --continue &&
echo rebase >expected.args &&
cat >expected.data <<-EOF &&
$(git rev-parse C) $(git rev-parse HEAD^)
$(git rev-parse D) $(git rev-parse HEAD)
EOF
verify_hook_input
'
test_expect_success 'git rebase --apply --skip' '
git reset --hard D &&
clear_hook_input &&
test_must_fail git rebase --apply --onto A B &&
test_must_fail git rebase --skip &&
echo D > foo &&
git add foo &&
git rebase --continue &&
echo rebase >expected.args &&
cat >expected.data <<-EOF &&
$(git rev-parse C) $(git rev-parse HEAD^)
$(git rev-parse D) $(git rev-parse HEAD)
EOF
verify_hook_input
'
test_expect_success 'git rebase --apply --skip the last one' '
git reset --hard F &&
clear_hook_input &&
test_must_fail git rebase --apply --onto D A &&
git rebase --skip &&
echo rebase >expected.args &&
cat >expected.data <<-EOF &&
$(git rev-parse E) $(git rev-parse HEAD)
$(git rev-parse F) $(git rev-parse HEAD)
EOF
verify_hook_input
'
test_expect_success 'git rebase -m' '
git reset --hard D &&
clear_hook_input &&
test_must_fail git rebase -m --onto A B &&
echo C > foo &&
git add foo &&
git rebase --continue &&
echo rebase >expected.args &&
cat >expected.data <<-EOF &&
$(git rev-parse C) $(git rev-parse HEAD^)
$(git rev-parse D) $(git rev-parse HEAD)
EOF
verify_hook_input
'
test_expect_success 'git rebase -m --skip' '
git reset --hard D &&
clear_hook_input &&
test_must_fail git rebase -m --onto A B &&
test_must_fail git rebase --skip &&
echo D > foo &&
git add foo &&
git rebase --continue &&
echo rebase >expected.args &&
cat >expected.data <<-EOF &&
$(git rev-parse C) $(git rev-parse HEAD^)
$(git rev-parse D) $(git rev-parse HEAD)
EOF
verify_hook_input
'
test_expect_success 'git rebase with implicit use of merge backend' '
git reset --hard D &&
clear_hook_input &&
test_must_fail git rebase --keep-empty --onto A B &&
echo C > foo &&
git add foo &&
git rebase --continue &&
echo rebase >expected.args &&
cat >expected.data <<-EOF &&
$(git rev-parse C) $(git rev-parse HEAD^)
$(git rev-parse D) $(git rev-parse HEAD)
EOF
verify_hook_input
'
test_expect_success 'git rebase --skip with implicit use of merge backend' '
git reset --hard D &&
clear_hook_input &&
test_must_fail git rebase --keep-empty --onto A B &&
test_must_fail git rebase --skip &&
echo D > foo &&
git add foo &&
git rebase --continue &&
echo rebase >expected.args &&
cat >expected.data <<-EOF &&
$(git rev-parse C) $(git rev-parse HEAD^)
$(git rev-parse D) $(git rev-parse HEAD)
EOF
verify_hook_input
'
. "$TEST_DIRECTORY"/lib-rebase.sh
set_fake_editor
# Helper to work around the lack of one-shot exporting for
# test_must_fail (as it is a shell function)
test_fail_interactive_rebase () {
(
FAKE_LINES="$1" &&
shift &&
export FAKE_LINES &&
test_must_fail git rebase -i "$@"
)
}
test_expect_success 'git rebase -i (unchanged)' '
git reset --hard D &&
clear_hook_input &&
test_fail_interactive_rebase "1 2" --onto A B &&
echo C > foo &&
git add foo &&
git rebase --continue &&
echo rebase >expected.args &&
cat >expected.data <<-EOF &&
$(git rev-parse C) $(git rev-parse HEAD^)
$(git rev-parse D) $(git rev-parse HEAD)
EOF
verify_hook_input
'
test_expect_success 'git rebase -i (skip)' '
git reset --hard D &&
clear_hook_input &&
test_fail_interactive_rebase "2" --onto A B &&
echo D > foo &&
git add foo &&
git rebase --continue &&
echo rebase >expected.args &&
cat >expected.data <<-EOF &&
$(git rev-parse D) $(git rev-parse HEAD)
EOF
verify_hook_input
'
test_expect_success 'git rebase -i (squash)' '
git reset --hard D &&
clear_hook_input &&
test_fail_interactive_rebase "1 squash 2" --onto A B &&
echo C > foo &&
git add foo &&
git rebase --continue &&
echo rebase >expected.args &&
cat >expected.data <<-EOF &&
$(git rev-parse C) $(git rev-parse HEAD)
$(git rev-parse D) $(git rev-parse HEAD)
EOF
verify_hook_input
'
test_expect_success 'git rebase -i (fixup without conflict)' '
git reset --hard D &&
clear_hook_input &&
FAKE_LINES="1 fixup 2" git rebase -i B &&
echo rebase >expected.args &&
cat >expected.data <<-EOF &&
$(git rev-parse C) $(git rev-parse HEAD)
$(git rev-parse D) $(git rev-parse HEAD)
EOF
verify_hook_input
'
test_expect_success 'git rebase -i (double edit)' '
git reset --hard D &&
clear_hook_input &&
FAKE_LINES="edit 1 edit 2" git rebase -i B &&
git rebase --continue &&
echo something > foo &&
git add foo &&
git rebase --continue &&
echo rebase >expected.args &&
cat >expected.data <<-EOF &&
$(git rev-parse C) $(git rev-parse HEAD^)
$(git rev-parse D) $(git rev-parse HEAD)
EOF
verify_hook_input
'
test_expect_success 'git rebase -i (exec)' '
git reset --hard D &&
clear_hook_input &&
FAKE_LINES="edit 1 exec_false 2" git rebase -i B &&
echo something >bar &&
git add bar &&
# Fails because of exec false
test_must_fail git rebase --continue &&
git rebase --continue &&
echo rebase >expected.args &&
cat >expected.data <<-EOF &&
$(git rev-parse C) $(git rev-parse HEAD^)
$(git rev-parse D) $(git rev-parse HEAD)
EOF
verify_hook_input
'
test_done