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b9cbd2958f
Commit d48e5e21da ("rebase (interactive-backend): make --keep-empty the
default", 2020-02-15) turned --keep-empty (for keeping commits which
start empty) into the default. The logic underpinning that commit was:
1) 'git commit' errors out on the creation of empty commits without an
override flag
2) Once someone determines that the override is worthwhile, it's
annoying and/or harmful to required them to take extra steps in
order to keep such commits around (and to repeat such steps with
every rebase).
While the logic on which the decision was made is sound, the result was
a bit of an overcorrection. Instead of jumping to having --keep-empty
being the default, it jumped to making --keep-empty the only available
behavior. There was a simple workaround, though, which was thought to
be good enough at the time. People could still drop commits which
started empty the same way the could drop any commits: by firing up an
interactive rebase and picking out the commits they didn't want from the
list. However, there are cases where external tools might create enough
empty commits that picking all of them out is painful. As such, having
a flag to automatically remove start-empty commits may be beneficial.
Provide users a way to drop commits which start empty using a flag that
existed for years: --no-keep-empty. Interpret --keep-empty as
countermanding any previous --no-keep-empty, but otherwise leaving
--keep-empty as the default.
This might lead to some slight weirdness since commands like
git rebase --empty=drop --keep-empty
git rebase --empty=keep --no-keep-empty
look really weird despite making perfect sense (the first will drop
commits which become empty, but keep commits that started empty; the
second will keep commits which become empty, but drop commits which
started empty). However, --no-keep-empty was named years ago and we are
predominantly keeping it for backward compatibility; also we suspect it
will only be used rarely since folks already have a simple way to drop
commits they don't want with an interactive rebase.
Reported-by: Bryan Turner <bturner@atlassian.com>
Reported-by: Sami Boukortt <sami@boukortt.com>
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
378 lines
8.7 KiB
Bash
Executable file
378 lines
8.7 KiB
Bash
Executable file
#!/bin/sh
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test_description='basic rebase topology tests'
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. ./test-lib.sh
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. "$TEST_DIRECTORY"/lib-rebase.sh
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# a---b---c
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# \
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# d---e
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test_expect_success 'setup' '
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test_commit a &&
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test_commit b &&
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test_commit c &&
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git checkout b &&
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test_commit d &&
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test_commit e
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'
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "simple rebase $*" "
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reset_rebase &&
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git rebase $* c e &&
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test_cmp_rev c HEAD~2 &&
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test_linear_range 'd e' c..
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"
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}
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test_run_rebase success --apply
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase success -p
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test_expect_success 'setup branches and remote tracking' '
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git tag -l >tags &&
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for tag in $(cat tags)
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do
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git branch branch-$tag $tag || return 1
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done &&
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git remote add origin "file://$PWD" &&
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git fetch origin
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'
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "rebase $* is no-op if upstream is an ancestor" "
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reset_rebase &&
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git rebase $* b e &&
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test_cmp_rev e HEAD
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"
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}
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test_run_rebase success --apply
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase success -p
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "rebase $* -f rewrites even if upstream is an ancestor" "
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reset_rebase &&
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git rebase $* -f b e &&
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test_cmp_rev ! e HEAD &&
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test_cmp_rev b HEAD~2 &&
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test_linear_range 'd e' b..
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"
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}
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test_run_rebase success --apply
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test_run_rebase success --fork-point
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase failure -p
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "rebase $* -f rewrites even if remote upstream is an ancestor" "
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reset_rebase &&
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git rebase $* -f branch-b branch-e &&
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test_cmp_rev ! branch-e origin/branch-e &&
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test_cmp_rev branch-b HEAD~2 &&
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test_linear_range 'd e' branch-b..
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"
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}
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test_run_rebase success --apply
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test_run_rebase success --fork-point
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase success -p
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "rebase $* fast-forwards from ancestor of upstream" "
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reset_rebase &&
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git rebase $* e b &&
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test_cmp_rev e HEAD
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"
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}
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test_run_rebase success --apply
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test_run_rebase success --fork-point
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase success -p
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# f
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# /
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# a---b---c---g---h
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# \
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# d---gp--i
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#
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# gp = cherry-picked g
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# h = reverted g
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#
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# Reverted patches are there for tests to be able to check if a commit
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# that introduced the same change as another commit is
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# dropped. Without reverted commits, we could get false positives
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# because applying the patch succeeds, but simply results in no
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# changes.
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test_expect_success 'setup of linear history for range selection tests' '
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git checkout c &&
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test_commit g &&
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revert h g &&
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git checkout d &&
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cherry_pick gp g &&
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test_commit i &&
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git checkout b &&
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test_commit f
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'
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "rebase $* drops patches in upstream" "
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reset_rebase &&
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git rebase $* h i &&
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test_cmp_rev h HEAD~2 &&
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test_linear_range 'd i' h..
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"
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}
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test_run_rebase success --apply
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase success -p
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "rebase $* can drop last patch if in upstream" "
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reset_rebase &&
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git rebase $* h gp &&
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test_cmp_rev h HEAD^ &&
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test_linear_range 'd' h..
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"
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}
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test_run_rebase success --apply
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase success -p
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "rebase $* --onto drops patches in upstream" "
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reset_rebase &&
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git rebase $* --onto f h i &&
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test_cmp_rev f HEAD~2 &&
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test_linear_range 'd i' f..
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"
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}
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test_run_rebase success --apply
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase success -p
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "rebase $* --onto does not drop patches in onto" "
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reset_rebase &&
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git rebase $* --onto h f i &&
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test_cmp_rev h HEAD~3 &&
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test_linear_range 'd gp i' h..
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"
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}
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test_run_rebase success --apply
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase success -p
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# a---b---c---j!
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# \
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# d---k!--l
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#
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# ! = empty
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test_expect_success 'setup of linear history for empty commit tests' '
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git checkout c &&
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make_empty j &&
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git checkout d &&
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make_empty k &&
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test_commit l
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'
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "rebase $* keeps begin-empty commits" "
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reset_rebase &&
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git rebase $* j l &&
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test_cmp_rev c HEAD~4 &&
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test_linear_range 'j d k l' c..
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"
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}
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test_run_rebase failure --apply
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase failure -p
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "rebase $* --no-keep-empty drops begin-empty commits" "
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reset_rebase &&
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git rebase $* --no-keep-empty c l &&
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test_cmp_rev c HEAD~2 &&
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test_linear_range 'd l' c..
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"
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}
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase success -p
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "rebase $* --keep-empty keeps empty even if already in upstream" "
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reset_rebase &&
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git rebase $* --keep-empty j l &&
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test_cmp_rev j HEAD~3 &&
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test_linear_range 'd k l' j..
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"
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}
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase success -p
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test_run_rebase success --rebase-merges
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# m
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# /
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# a---b---c---g
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#
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# x---y---bp
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#
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# bp = cherry-picked b
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# m = reverted b
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#
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# Reverted patches are there for tests to be able to check if a commit
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# that introduced the same change as another commit is
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# dropped. Without reverted commits, we could get false positives
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# because applying the patch succeeds, but simply results in no
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# changes.
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test_expect_success 'setup of linear history for test involving root' '
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git checkout b &&
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revert m b &&
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git checkout --orphan disjoint &&
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git rm -rf . &&
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test_commit x &&
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test_commit y &&
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cherry_pick bp b
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'
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "rebase $* --onto --root" "
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reset_rebase &&
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git rebase $* --onto c --root y &&
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test_cmp_rev c HEAD~2 &&
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test_linear_range 'x y' c..
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"
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}
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test_run_rebase success --apply
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase success -p
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "rebase $* without --onto --root with disjoint history" "
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reset_rebase &&
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git rebase $* c y &&
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test_cmp_rev c HEAD~2 &&
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test_linear_range 'x y' c..
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"
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}
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test_run_rebase success --apply
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase failure -p
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "rebase $* --onto --root drops patch in onto" "
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reset_rebase &&
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git rebase $* --onto m --root bp &&
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test_cmp_rev m HEAD~2 &&
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test_linear_range 'x y' m..
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"
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}
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test_run_rebase success --apply
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase success -p
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "rebase $* --onto --root with merge-base does not go to root" "
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reset_rebase &&
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git rebase $* --onto m --root g &&
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test_cmp_rev m HEAD~2 &&
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test_linear_range 'c g' m..
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"
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}
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test_run_rebase success --apply
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase failure -p
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "rebase $* without --onto --root with disjoint history drops patch in onto" "
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reset_rebase &&
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git rebase $* m bp &&
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test_cmp_rev m HEAD~2 &&
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test_linear_range 'x y' m..
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"
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}
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test_run_rebase success --apply
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase failure -p
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "rebase $* --root on linear history is a no-op" "
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reset_rebase &&
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git rebase $* --root c &&
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test_cmp_rev c HEAD
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"
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}
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test_run_rebase success ''
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase failure -p
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test_run_rebase () {
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result=$1
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shift
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test_expect_$result "rebase $* -f --root on linear history causes re-write" "
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reset_rebase &&
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git rebase $* -f --root c &&
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test_cmp_rev ! a HEAD~2 &&
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test_linear_range 'a b c' HEAD
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"
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}
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test_run_rebase success ''
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test_run_rebase success -m
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test_run_rebase success -i
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test_have_prereq !REBASE_P || test_run_rebase success -p
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test_done
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