[PATCH v3 0/2] format-patch: learn --[no-]range-diff-notes

From: Kristoffer Haugsbakk <redacted>

Topic name (applied): kh/format-patch-range-diff-notes

Topic summary: Teach 'format-patch' options to tweak notes output in the
range diff independent of what notes are output in the patches.

See patch 2/2 for details.

This is motivated by wanting to turn off range diff notes, but the goal
here is to implement it in full generality.

(How many of us `git format-patch --notes` users are there out there? More
than a dozen? Maybe just D. Ben Knoble and me?)

I have implemented this behavior for myself and used it for many
months. But that was hacky and only suitable for one person’s use.
So this is a completely new implementation. In other words: this is
new code, *not* tested for months.

§ Changes in v3

From patch 2/2:

Remove repeated and redundant `test_when_finished` on
patch files:

https://lore.kernel.org/git/CV_format-patch_learn_--range-diff-notes.c57@msgid.xyz/T/#m06803e233a2e385e694432d45ecf402f7a67e482 (local)

§ Link to v2

https://lore.kernel.org/git/V2_CV_format-patch_learn_--range-diff-notes.cdb@m5gid.xyz/ (local)

[1/2] format-patch: simplify get_notes_arg parameters
[2/2] format-patch: learn --[no-]range-diff-notes

 Documentation/git-format-patch.adoc | 15 +++++
 builtin/log.c                       | 62 +++++++++++++++++++--
 t/t3206-range-diff.sh               | 86 +++++++++++++++++++++++++++++
 3 files changed, 157 insertions(+), 6 deletions(-)

Interdiff against v2:

diff --git a/t/t3206-range-diff.sh b/t/t3206-range-diff.sh
index 640c5dec52e..679a707c873 100755
--- a/t/t3206-range-diff.sh
+++ b/t/t3206-range-diff.sh

@@ -860,7 +860,6 @@ test_expect_success 'format-patch --range-diff-notes=not-a-note (no --range-diff
 	test_when_finished "rm -f 000?-*" &&
 	git format-patch --range-diff-notes=not-a-note --cover-letter \
 		main..unmodified &&
-	test_when_finished "rm -f 000?-*" &&
 	test_file_not_empty 0000-cover-letter* &&
 	test_grep ! "^Range-diff:" 0000-cover-letter* &&
 	test_grep ! "## Notes " 0000-cover-letter*

Range-diff against v2:
1:  977f9c2e97a = 1:  977f9c2e97a format-patch: simplify get_notes_arg parameters
2:  bf66e94e376 ! 2:  748759ca021 format-patch: learn --[no-]range-diff-notes
    @@ Commit message
     
     
      ## Notes (testing) ##
    -    CI: https://github.com/LemmingAvalanche/git/actions/runs/36231842902
    -
    -    This run is on a previous iteration where v1 patch/commit 2/3 was still
    -    there. But that is just a rename. So I compiled and tested
    -    `t/t3206-range-diff.sh` and took that as proof that the full CI/build run
    -    is still valid.
    +    For v3: only compiled and ran `t3206-range-diff`.
     
      ## Documentation/git-format-patch.adoc ##
     @@ Documentation/git-format-patch.adoc: case is to show comparison with an older iteration of the same
    @@ t/t3206-range-diff.sh: test_expect_success 'format-patch --range-diff with multi
     +	test_when_finished "rm -f 000?-*" &&
     +	git format-patch --range-diff-notes=not-a-note --cover-letter \
     +		main..unmodified &&
    -+	test_when_finished "rm -f 000?-*" &&
     +	test_file_not_empty 0000-cover-letter* &&
     +	test_grep ! "^Range-diff:" 0000-cover-letter* &&
     +	test_grep ! "## Notes " 0000-cover-letter*

base-commit: 1a3e64c6c4a623626ff0687008732a8e007e2a1c
-- 
2.55.0.793.gc667de3f2c5