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[PATCH 04/10] diff: drop complete_rewrite parameter from run_external_diff()

From
Jeff King <peff@peff.net>
Date
Feb 14, 2019, 05:49 UTC
Message-ID
<20190214054941.GD20578@sigill.intra.peff.net>
In-Reply-To
<20190214054736.GA20091@sigill.intra.peff.net>

Our builtin_diff() wants to know whether break-detection found a complete rewrite, because it changes how the diff is shown. However, when calling out to an external diff, we don't pass this information along (and doing so would require designing a new interface to the user-provided program).

Let's drop the unused parameter to make this fact more clear.
Signed-off-by: Jeff King <peff@peff.net>
---
An alternative is to pass $COMPLETE_REWRITE in the environment. That
would avoid disrupting existing external diff callers, and they could
peek at the information if they really cared. But given that nobody has
actually asked for this, I'm inclined not to add a new interface element
that we'd then have to support forever.
 diff.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/diff.c b/diff.c
index d24843b531..e3f263769b 100644
--- a/diff.c
+++ b/diff.c
@@ -4178,7 +4178,6 @@ static void run_external_diff(const char *pgm,
 			      struct diff_filespec *one,
 			      struct diff_filespec *two,
 			      const char *xfrm_msg,
-			      int complete_rewrite,
 			      struct diff_options *o)
 {
 	struct argv_array argv = ARGV_ARRAY_INIT;
@@ -4336,8 +4335,7 @@ static void run_diff_cmd(const char *pgm,
 	}
 
 	if (pgm) {
-		run_external_diff(pgm, name, other, one, two, xfrm_msg,
-				  complete_rewrite, o);
+		run_external_diff(pgm, name, other, one, two, xfrm_msg, o);
 		return;
 	}
 	if (one && two)
-- 
2.21.0.rc1.567.g648f076c3f
Previous: Jeff KingNext: Jeff King
Message 5 of 11 in “dropping more unused function parameters”
  1. 0/10 dropping more unused function parametersJeff King, Feb 14, 2019
  2. 01/10 diff: drop options parameter from diffcore_fix_diff_index()Jeff King, Feb 14, 2019
  3. 02/10 diff: drop unused color reset parametersJeff King, Feb 14, 2019
  4. 03/10 diff: drop unused emit data parameter from sane_truncate_line()Jeff King, Feb 14, 2019
  5. 04/10 diff: drop complete_rewrite parameter from run_external_diff()Jeff King, Feb 14, 2019
  6. 05/10 merge-recursive: drop several unused parametersJeff King, Feb 14, 2019
  7. 06/10 pack-objects: drop unused parameter from oe_map_new_pack()Jeff King, Feb 14, 2019
  8. 07/10 files-backend: drop refs parameter from split_symref_update()Jeff King, Feb 14, 2019
  9. 08/10 ref-filter: drop unused buf/sz pairsJeff King, Feb 14, 2019
  10. 09/10 ref-filter: drop unused "obj" parametersJeff King, Feb 14, 2019
  11. 10/10 ref-filter: drop unused "sz" parametersJeff King, Feb 14, 2019

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