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* [RFC PATCH] rev-list: clarify --abbrev and --abbrev-commit usage
@ 2019-06-13 22:15 Emily Shaffer
  2019-06-14 16:09 ` Junio C Hamano
  2019-06-14 16:18 ` Jeff King
  0 siblings, 2 replies; 8+ messages in thread
From: Emily Shaffer @ 2019-06-13 22:15 UTC (permalink / raw)
  To: git; +Cc: Emily Shaffer

Indicate that --abbrev only works with --abbrev-commit also specified.
It seems that simply running `git rev-list --abbrev=5` doesn't
abbreviate commit OIDs. But the combination of `git rev-list
--abbrev-commit --abbrev=5` works as expected. Clarify in the
documentation by indicating that --abbrev is an optional addition to the
--abbrev-commit option. --no-abbrev remains on a separate line as it can
still be used to disable OID abbreviation even if --abbrev-commit has
been specified.

Signed-off-by: Emily Shaffer <>
Change-Id: If9b1198938e1a3515ae6740241f7b791fb7a88bd
I thought this was odd when I was working on the other rev-list changes
- --abbrev doesn't do anything on its own. It looks like it does work by
itself in other commands, but apparently not in rev-list.

Listed this patch as RFC because maybe instead it's better to fix
something so --abbrev can be used alone, or teach --abbrev-commit=<n>.
It looks like `git log --abbrev=5` also doesn't work the way one might
expect, which makes sense to me, as they use the same internals for
option parsing (parse_revisions()).

The manpages for log and rev-list both correctly indicate that
--abbrev=<n> is an optional addition to --abbrev-commit. `git log -h` is
generated by parse-options tooling and doesn't cover --abbrev-commit at
all, but `git rev-list` doesn't use an option parser on its own and the
usage is hardcoded.

 - Emily

 builtin/rev-list.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/builtin/rev-list.c b/builtin/rev-list.c
index 9f31837d30..6ae0087b01 100644
--- a/builtin/rev-list.c
+++ b/builtin/rev-list.c
@@ -49,8 +49,8 @@ static const char rev_list_usage[] =
 "    --objects | --objects-edge\n"
 "    --unpacked\n"
 "    --header | --pretty\n"
-"    --abbrev=<n> | --no-abbrev\n"
-"    --abbrev-commit\n"
+"    --abbrev-commit [--abbrev=<n>]\n"
+"    --no-abbrev\n"
 "    --left-right\n"
 "    --count\n"
 "  special purpose:\n"

^ permalink raw reply	[flat|nested] 8+ messages in thread

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Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
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2019-06-13 22:15 [RFC PATCH] rev-list: clarify --abbrev and --abbrev-commit usage Emily Shaffer
2019-06-14 16:09 ` Junio C Hamano
2019-06-14 16:18 ` Jeff King
2019-06-14 20:59   ` Emily Shaffer
2019-06-14 21:27     ` Jeff King
2019-06-14 22:56       ` Emily Shaffer
2019-06-19 21:21         ` Jeff King
2019-06-19 22:09           ` Emily Shaffer list mirror (unofficial, one of many)

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