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[PATCH] push: comment on a funny unbalanced option help

From
Junio C Hamano <gitster@pobox.com>
Date
Aug 1, 2018, 18:43 UTC
Message-ID
<xmqqh8ke6i7w.fsf@gitster-ct.c.googlers.com>

The option help text for the force-with-lease option to "git push" reads like this:

    $ git push -h 2>&1 | grep -e force-with-lease
       --force-with-lease[=<refname>:<expect>]
which come from this
 		  0, CAS_OPT_NAME, &cas, N_("refname>:<expect"),

in the source code, with an aparent lack of "<" and ">" at both ends.

It turns out that parse-options machinery takes the whole string and encloses it inside a pair of "<>", expecting that it is a single placeholder. The help string was written in a funnily unbalanced way knowing that the end result would balance out.

Add a comment to save future readers from wasting time just like I did ;-)

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 builtin/push.c | 1 +
 1 file changed, 1 insertion(+)
diff --git a/builtin/push.c b/builtin/push.c
index 9cd8e8cd56..9608b0cc4f 100644
--- a/builtin/push.c
+++ b/builtin/push.c
@@ -558,6 +558,7 @@ int cmd_push(int argc, const char **argv, const char *prefix)
 		OPT_BIT( 0,  "porcelain", &flags, N_("machine-readable output"), TRANSPORT_PUSH_PORCELAIN),
 		OPT_BIT('f', "force", &flags, N_("force updates"), TRANSPORT_PUSH_FORCE),
 		{ OPTION_CALLBACK,
+		  /* N_() will get "<>" around, resulting in "<refname>:<expect>" */
 		  0, CAS_OPT_NAME, &cas, N_("refname>:<expect"),
 		  N_("require old value of ref to be at this value"),
 		  PARSE_OPT_OPTARG, parseopt_push_cas_option },
-- 
2.18.0-321-gffc6fa0e39
Next: Ævar Arnfjörð Bjarmason
Message 1 of 38 in “push: comment on a funny unbalanced option help”
  1. push: comment on a funny unbalanced option helpJunio C Hamano, Aug 1, 2018
  2. Ævar Arnfjörð BjarmasonAug 1, 2018
  3. Junio C HamanoAug 1, 2018
  4. Ævar Arnfjörð BjarmasonAug 1, 2018
  5. René ScharfeAug 2, 2018
  6. Ævar Arnfjörð BjarmasonAug 2, 2018
  7. René ScharfeAug 2, 2018
  8. René ScharfeAug 2, 2018
  9. Junio C HamanoAug 2, 2018
  10. Junio C HamanoAug 2, 2018
  11. René ScharfeAug 2, 2018
  12. Jeff KingAug 2, 2018
  13. René ScharfeAug 2, 2018
  14. 1/6 add, update-index: fix --chmod argument helpRené Scharfe, Aug 2, 2018
  15. Ævar Arnfjörð BjarmasonAug 2, 2018
  16. Ramsay JonesAug 2, 2018
  17. Junio C HamanoAug 2, 2018
  18. Andrei RybakAug 2, 2018
  19. Junio C HamanoAug 2, 2018
  20. 2/6 difftool: remove angular brackets from argument helpRené Scharfe, Aug 2, 2018
  21. 3/6 pack-objects: specify --index-version argument help explicitlyRené Scharfe, Aug 2, 2018
  22. 4/6 send-pack: specify --force-with-lease argument help explicitlyRené Scharfe, Aug 2, 2018
  23. 5/6 shortlog: correct option help for -wRené Scharfe, Aug 2, 2018
  24. 6/6 parse-options: automatically infer PARSE_OPT_LITERAL_ARGHELPRené Scharfe, Aug 2, 2018
  25. Junio C HamanoAug 2, 2018
  26. Kerry, RichardAug 3, 2018
  27. Kerry, RichardAug 3, 2018
  28. Junio C HamanoAug 2, 2018
  29. René ScharfeAug 2, 2018
  30. Junio C HamanoAug 3, 2018
  31. Re* [PATCH] push: comment on a funny unbalanced option helpJunio C Hamano, Aug 2, 2018
  32. René ScharfeAug 2, 2018
  33. Junio C HamanoAug 2, 2018
  34. Ævar Arnfjörð BjarmasonAug 2, 2018
  35. Junio C HamanoAug 2, 2018
  36. René ScharfeAug 3, 2018
  37. Junio C HamanoAug 3, 2018
  38. Jonathan NiederAug 1, 2018

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