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[PATCH] git-diff.txt: prefer not using <commit>..<commit>

From
Denton Liu <liu.denton@gmail.com>
Date
Mar 17, 2019, 11:09 UTC
Message-ID
<bc7c3f9d769b2d5a108ff4cdc3c7277e112fdb56.1552820745.git.liu.denton@gmail.com>
The documentation used to consider
	git diff <commit> <commit>
and
	git diff <commit>..<commit>

to be equal counterparts. However, rev-list-ish commands also use the <commit>..<commit> notation, but in a logically conflicting manner which was confusing for some users (including me!).

Deprecating the notation entirely is not really an option because it would be an arduous process without much end-value. In addition, there are some valid use-cases that we don't want to break.

Document the preference of the first form so that future confusion can be minimised.

Signed-off-by: Denton Liu <liu.denton@gmail.com>
---

Thanks all on your feedback on the discussion thread[1]! I opted for just the documentation-only route so we don't break any valid use-cases.

[1]: https://public-inbox.org/git/20190311093751.GA31092@archbookpro.localdomain/
 Documentation/git-diff.txt | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/Documentation/git-diff.txt b/Documentation/git-diff.txt
index 72179d993c..10c7a2220c 100644
--- a/Documentation/git-diff.txt
+++ b/Documentation/git-diff.txt
@@ -63,7 +63,11 @@ two blob objects, or changes between two files on disk.
 
 'git diff' [<options>] <commit>..<commit> [--] [<path>...]::
 
-	This is synonymous to the previous form.  If <commit> on
+	This is synonymous to the previous form.  However,
+	users should prefer the previous form over this form
+	as this form may be more confusing due to the same
+	notation having a logically conflicting meaning in
+	linkgit:git-rev-list[1]-ish commands.  If <commit> on
 	one side is omitted, it will have the same effect as
 	using HEAD instead.
 
-- 
2.21.0.512.g57bf1b23e1
Next: Duy Nguyen
Message 1 of 16 in “git-diff.txt: prefer not using <commit>..<commit>”
  1. git-diff.txt: prefer not using <commit>..<commit>Denton Liu, Mar 17, 2019
  2. Duy NguyenMar 17, 2019
  3. Junio C HamanoMar 18, 2019
  4. Denton LiuMar 19, 2019
  5. Johannes SchindelinMar 21, 2019
  6. Ævar Arnfjörð BjarmasonMar 17, 2019
  7. Duy NguyenMar 17, 2019
  8. Ævar Arnfjörð BjarmasonMar 17, 2019
  9. Junio C HamanoMar 18, 2019
  10. Elijah NewrenMar 18, 2019
  11. Ævar Arnfjörð BjarmasonMar 18, 2019
  12. Junio C HamanoMar 19, 2019
  13. Elijah NewrenMar 20, 2019
  14. Elijah NewrenMar 18, 2019
  15. Denton LiuMar 20, 2019
  16. Elijah NewrenMar 21, 2019

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