Re: [PATCH] branch -l: print useful info whilst rebasing a non-local branch

[Eric Sunshine <sunshine@sunshineco.com>]

On Sun, Mar 25, 2018 at 09:11:34AM +0530, Kaartic Sivaraam wrote:
> On Sunday 25 March 2018 07:04 AM, Eric Sunshine wrote:
> > Can we have a couple new tests: one checking "git branch --list" for
> > the typical case (when rebasing off a named branch) and one checking
> > when rebasing from a detached HEAD?
> 
> Sure, but I guess it would take some time for me to add the tests. I'll
> send a v2 with the suggested changes.

A couple more comments:

* Please run the commit message through a spell checker; it contains
  several typographical errors.

* I wonder if it makes sense to give slightly different output in the
  detached HEAD case. Normal output is:

      (no branch, rebasing <branch>)

  and, with your change, detached HEAD output is:

      (no branch, rebasing d3adb33f)

  which is okay, but perhaps it could be better; for instance:

      (no branch, rebasing detached HEAD d3adb33f)

Anyhow, I wrote the tests for you. When you re-roll, you can make the
following patch 2/2 and your fix 1/2. (If you go with the above idea
of using a slightly different wording for the detached HEAD case, then
you'll need to adjust the 'grep' slightly in the second test.)

--- >8 ---
From: Eric Sunshine <sunshine@sunshineco.com>
Date: Sun, 25 Mar 2018 01:29:58 -0400
Subject: [PATCH] t3200: verify "branch --list" sanity when rebasing from
 detached HEAD

"git branch --list" shows an in-progress rebase as:

  * (no branch, rebasing <branch>)
    master
    ...

However, if the rebase is started from a detached HEAD, then there is no
<branch>, and it would attempt to print a NULL pointer. The previous
commit fixed this problem, so add a test to verify that the output is
sane in this situation.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
---
 t/t3200-branch.sh | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/t/t3200-branch.sh b/t/t3200-branch.sh
index 6c0b7ea4ad..d1f80c80ab 100755
--- a/t/t3200-branch.sh
+++ b/t/t3200-branch.sh
@@ -6,6 +6,7 @@
 test_description='git branch assorted tests'
 
 . ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-rebase.sh
 
 test_expect_success 'prepare a trivial repository' '
 	echo Hello >A &&
@@ -1246,6 +1247,29 @@ test_expect_success '--merged is incompatible with --no-merged' '
 	test_must_fail git branch --merged HEAD --no-merged HEAD
 '
 
+test_expect_success '--list during rebase' '
+	test_when_finished "reset_rebase" &&
+	git checkout master &&
+	FAKE_LINES="1 edit 2" &&
+	export FAKE_LINES &&
+	set_fake_editor &&
+	git rebase -i HEAD~2 &&
+	git branch --list >actual &&
+	grep "rebasing master" actual
+'
+
+test_expect_success '--list during rebase from detached HEAD' '
+	test_when_finished "reset_rebase && git checkout master" &&
+	git checkout HEAD^0 &&
+	oid=$(git rev-parse --short HEAD) &&
+	FAKE_LINES="1 edit 2" &&
+	export FAKE_LINES &&
+	set_fake_editor &&
+	git rebase -i HEAD~2 &&
+	git branch --list >actual &&
+	grep "rebasing $oid" actual
+'
+
 test_expect_success 'tracking with unexpected .fetch refspec' '
 	rm -rf a b c d &&
 	git init a &&
-- 
2.17.0.rc1.321.gba9d0f2565
--- >8 ---