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[PATCH 15/16] git: avoid magic number with skip_prefix

From
Jeff King <peff@peff.net>
Date
Jun 18, 2014, 19:56 UTC
Message-ID
<20140618195648.GO22622@sigill.intra.peff.net>
In-Reply-To
<20140618194117.GA22269@sigill.intra.peff.net>

After handling options, any leftover arguments should be commands. However, we pass through "--help" and "--version", so that we convert them into "git help" and "git version" respectively.

This is a straightforward use of skip_prefix to avoid a magic number, but while we are there, it is worth adding a comment to explain this otherwise confusing behavior.

Signed-off-by: Jeff King <peff@peff.net>
---
Another option would be to teach handle_options to convert "--version"
into "version" itself. That's more disruptive, but I think would be
less confusing.
 git.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/git.c b/git.c
index b2bb09e..1537f00 100644
--- a/git.c
+++ b/git.c
@@ -588,8 +588,8 @@ int main(int argc, char **av)
 	argc--;
 	handle_options(&argv, &argc, NULL);
 	if (argc > 0) {
-		if (starts_with(argv[0], "--"))
-			argv[0] += 2;
+		/* translate --help and --version into commands */
+		skip_prefix(argv[0], "--", &argv[0]);
 	} else {
 		/* The user didn't specify a command; give them help */
 		commit_pager_choice();
-- 
2.0.0.566.gfe3e6b2
Previous: Eric SunshineNext: Jeff King
Message 29 of 33 in “skip_prefix refactoring and cleanups”
  1. 0/16 skip_prefix refactoring and cleanupsJeff King, Jun 18, 2014
  2. 01/16 parse_diff_color_slot: drop ofs parameterJeff King, Jun 18, 2014
  3. 02/16 daemon: mark some strings as constJeff King, Jun 18, 2014
  4. 03/16 avoid using skip_prefix as a booleanJeff King, Jun 18, 2014
  5. 04/16 refactor skip_prefix to return a booleanJeff King, Jun 18, 2014
  6. Eric SunshineJun 20, 2014
  7. Jeff KingJun 20, 2014
  8. Eric SunshineJun 20, 2014
  9. Jeff KingJun 20, 2014
  10. Junio C HamanoJun 23, 2014
  11. Jeff KingJun 23, 2014
  12. builtin/clone.c: detect a clone starting at a tag correctlyJunio C Hamano, Jun 23, 2014
  13. 05/16 apply: use skip_prefix instead of raw additionJeff King, Jun 18, 2014
  14. 06/16 fast-import: fix read of uninitialized argv memoryJeff King, Jun 18, 2014
  15. 07/16 transport-helper: avoid reading past end-of-stringJeff King, Jun 18, 2014
  16. 08/16 use skip_prefix to avoid magic numbersJeff King, Jun 18, 2014
  17. Junio C HamanoJun 23, 2014
  18. Jeff KingJul 1, 2014
  19. 09/16 use skip_prefix to avoid repeating stringsJeff King, Jun 18, 2014
  20. 10/16 fast-import: use skip_prefix for parsing inputJeff King, Jun 18, 2014
  21. Eric SunshineJun 20, 2014
  22. Jeff KingJun 20, 2014
  23. Eric SunshineJun 20, 2014
  24. 11/16 daemon: use skip_prefix to avoid magic numbersJeff King, Jun 18, 2014
  25. 12/16 stat_opt: check extra strlen callJeff King, Jun 18, 2014
  26. 13/16 fast-import: refactor parsing of spacesJeff King, Jun 18, 2014
  27. 14/16 fetch-pack: refactor parsing in get_ackJeff King, Jun 18, 2014
  28. Eric SunshineJun 20, 2014
  29. 15/16 git: avoid magic number with skip_prefixJeff King, Jun 18, 2014
  30. 16/16 use skip_prefix to avoid repeated calculationsJeff King, Jun 18, 2014
  31. Tanay AbhraJun 19, 2014
  32. 17/16 http-push: refactor parsing of remote object namesJeff King, Jun 19, 2014
  33. Jeff KingJun 19, 2014

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