[PATCH v4 0/4] rebase: teach rebase --keep-base

[Denton Liu <liu.denton@gmail.com>]

Hi all,

I dug into it a little more and according to the bash 4.2->4.3
changelog,

	bbb. Fixed a bug that caused spurious DEL characters (\177) to appear in
	double-quoted expansion where the RHS is evaluated to the empty string.

so, in particular, I've removed all of the '' from the tests.

I also downloaded bash 4.2 and tested everything with that. Seems to be
working well!

Thanks for catching this!

---

This patchset now depends "[PATCH 1/8] tests (rebase): spell out the
`--keep-empty` option" which is the first patch of Johannes's "Do not
use abbreviated options in tests" patchset[1]. (Thanks for catching
that, Johannes!)

Changes since v1:

* Squashed old set into one patch
* Fixed indentation style and dangling else
* Added more documentation after discussion with Ævar

Changes since v2:

* Add testing for rebase --fork-point behaviour
* Add testing for rebase fast-forward behaviour
* Make rebase --onto fast-forward in more cases
* Update documentation to include use-case

Changes since v3:

* Fix tests failing on bash 4.2
* Fix typo in t3431 comment

[1]: https://public-inbox.org/git/a1b4b74b9167e279dae4cd8c58fb28d8a714a66a.1553537656.git.gitgitgadget@gmail.com/

Denton Liu (4):
  t3431: add rebase --fork-point tests
  t3432: test rebase fast-forward behavior
  rebase: fast-forward --onto in more cases
  rebase: teach rebase --keep-base

 Documentation/git-rebase.txt     | 30 +++++++++++--
 builtin/rebase.c                 | 72 +++++++++++++++++++++++---------
 t/t3400-rebase.sh                |  2 +-
 t/t3404-rebase-interactive.sh    |  2 +-
 t/t3416-rebase-onto-threedots.sh | 57 +++++++++++++++++++++++++
 t/t3431-rebase-fork-point.sh     | 57 +++++++++++++++++++++++++
 t/t3432-rebase-fast-forward.sh   | 62 +++++++++++++++++++++++++++
 7 files changed, 258 insertions(+), 24 deletions(-)
 create mode 100755 t/t3431-rebase-fork-point.sh
 create mode 100755 t/t3432-rebase-fast-forward.sh

Interdiff against v3:
diff --git a/t/t3431-rebase-fork-point.sh b/t/t3431-rebase-fork-point.sh
index 0311bcbc68..e63040932f 100755
--- a/t/t3431-rebase-fork-point.sh
+++ b/t/t3431-rebase-fork-point.sh
@@ -11,7 +11,7 @@ test_description='git rebase --fork-point test'
 #     \
 #      C*---F---G (side)
 #
-# C was formerly part of master but is side out
+# C was formerly part of master but master was rewound to remove C
 #
 test_expect_success setup '
 	test_commit A &&
@@ -29,29 +29,29 @@ test_expect_success setup '
 test_rebase() {
 	expected="$1" &&
 	shift &&
-	test_expect_success "git rebase $@" "
+	test_expect_success "git rebase $*" "
 		git checkout master &&
 		git reset --hard E &&
 		git checkout side &&
 		git reset --hard G &&
-		git rebase $@ &&
+		git rebase $* &&
 		test_write_lines $expected >expect &&
 		git log --pretty=%s >actual &&
 		test_cmp expect actual
 	"
 }
 
-test_rebase 'G F E D B A' ''
-test_rebase 'G F D B A' '--onto D'
-test_rebase 'G F B A' '--keep-base'
-test_rebase 'G F C E D B A' '--no-fork-point'
-test_rebase 'G F C D B A' '--no-fork-point --onto D'
-test_rebase 'G F C B A' '--no-fork-point --keep-base'
-test_rebase 'G F E D B A' '--fork-point refs/heads/master'
-test_rebase 'G F D B A' '--fork-point --onto D refs/heads/master'
-test_rebase 'G F B A' '--fork-point --keep-base refs/heads/master'
-test_rebase 'G F C E D B A' 'refs/heads/master'
-test_rebase 'G F C D B A' '--onto D refs/heads/master'
-test_rebase 'G F C B A' '--keep-base refs/heads/master'
+test_rebase 'G F E D B A'
+test_rebase 'G F D B A' --onto D
+test_rebase 'G F B A' --keep-base
+test_rebase 'G F C E D B A' --no-fork-point
+test_rebase 'G F C D B A' --no-fork-point --onto D
+test_rebase 'G F C B A' --no-fork-point --keep-base
+test_rebase 'G F E D B A' --fork-point refs/heads/master
+test_rebase 'G F D B A' --fork-point --onto D refs/heads/master
+test_rebase 'G F B A' --fork-point --keep-base refs/heads/master
+test_rebase 'G F C E D B A' refs/heads/master
+test_rebase 'G F C D B A' --onto D refs/heads/master
+test_rebase 'G F C B A' --keep-base refs/heads/master
 
 test_done
diff --git a/t/t3432-rebase-fast-forward.sh b/t/t3432-rebase-fast-forward.sh
index 8585c21c5c..f493ce64c4 100755
--- a/t/t3432-rebase-fast-forward.sh
+++ b/t/t3432-rebase-fast-forward.sh
@@ -18,34 +18,34 @@ test_expect_success setup '
 test_rebase_same_head() {
 	status="$1" &&
 	shift &&
-	test_expect_$status "git rebase $@ with $changes is no-op" "
+	test_expect_$status "git rebase $* with $changes is no-op" "
 		oldhead=\$(git rev-parse HEAD) &&
 		test_when_finished 'git reset --hard \$oldhead' &&
-		git rebase $@ &&
+		git rebase $* &&
 		newhead=\$(git rev-parse HEAD) &&
 		test_cmp_rev \$oldhead \$newhead
 	"
 }
 
 changes='no changes'
-test_rebase_same_head success ''
-test_rebase_same_head success 'master'
-test_rebase_same_head success '--onto B B'
-test_rebase_same_head success '--onto B... B'
-test_rebase_same_head success '--onto master... master'
-test_rebase_same_head success '--keep-base master'
+test_rebase_same_head success
+test_rebase_same_head success master
+test_rebase_same_head success --onto B B
+test_rebase_same_head success --onto B... B
+test_rebase_same_head success --onto master... master
+test_rebase_same_head success --keep-base master
 
 test_expect_success 'add work to side' '
 	test_commit E
 '
 
 changes='our changes'
-test_rebase_same_head success ''
-test_rebase_same_head success 'master'
-test_rebase_same_head success '--onto B B'
-test_rebase_same_head success '--onto B... B'
-test_rebase_same_head success '--onto master... master'
-test_rebase_same_head success '--keep-base master'
+test_rebase_same_head success
+test_rebase_same_head success master
+test_rebase_same_head success --onto B B
+test_rebase_same_head success --onto B... B
+test_rebase_same_head success --onto master... master
+test_rebase_same_head success --keep-base master
 
 test_expect_success 'add work to upstream' '
 	git checkout master &&
@@ -54,9 +54,9 @@ test_expect_success 'add work to upstream' '
 '
 
 changes='our and their changes'
-test_rebase_same_head success '--onto B B'
-test_rebase_same_head success '--onto B... B'
-test_rebase_same_head success '--onto master... master'
-test_rebase_same_head success '--keep-base master'
+test_rebase_same_head success --onto B B
+test_rebase_same_head success --onto B... B
+test_rebase_same_head success --onto master... master
+test_rebase_same_head success --keep-base master
 
 test_done
-- 
2.21.0.843.gd0ae0373aa