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From: Thomas Gummerer <t.gummerer@gmail.com>
To: git@vger.kernel.org
Cc: Duy Nguyen <pclouds@gmail.com>,
	Johannes Schindelin <Johannes.Schindelin@gmx.de>,
	Junio C Hamano <gitster@pobox.com>,
	Eric Sunshine <sunshine@sunshineco.com>,
	Johannes Sixt <j6t@kdbg.org>,
	Thomas Gummerer <t.gummerer@gmail.com>
Subject: [PATCH v2 10/14] range-diff: don't remove funcname from inner diff
Date: Fri,  5 Jul 2019 18:06:26 +0100	[thread overview]
Message-ID: <20190705170630.27500-11-t.gummerer@gmail.com> (raw)
In-Reply-To: <20190705170630.27500-1-t.gummerer@gmail.com>

When postprocessing the inner diff in range-diff, we currently replace
the whole hunk header line with just "@@".  This matches how 'git
tbdiff' used to handle hunk headers as well.

Most likely this is being done because line numbers in the hunk header
are not relevant without other changes.  They can for example easily
change if a range is rebased, and lines are added/removed before a
change that we actually care about in our ranges.

However it can still be useful to have the function name that 'git
diff' extracts as additional context for the change.

Note that it is not guaranteed that the hunk header actually shows up
in the range-diff, and this change only aims to improve the case where
a hunk header would already be included in the final output.

Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
---
 range-diff.c          | 8 +++++---
 t/t3206-range-diff.sh | 6 +++---
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/range-diff.c b/range-diff.c
index 916afa44c0..484b1ec5a9 100644
--- a/range-diff.c
+++ b/range-diff.c
@@ -113,9 +113,11 @@ static int read_patches(const char *range, struct string_list *list)
 				strbuf_addch(&buf, '\n');
 			}
 			continue;
-		} else if (starts_with(line, "@@ "))
-			strbuf_addstr(&buf, "@@");
-		else if (!line[0] || starts_with(line, "index "))
+		} else if (skip_prefix(line, "@@ ", &p)) {
+			if (!(p = strstr(p, "@@")))
+				die(_("invalid hunk header in inner diff"));
+			strbuf_addstr(&buf, p);
+		} else if (!line[0] || starts_with(line, "index "))
 			/*
 			 * A completely blank (not ' \n', which is context)
 			 * line is not valid in a diff.  We skip it
diff --git a/t/t3206-range-diff.sh b/t/t3206-range-diff.sh
index 048feaf6dd..aebd4e3693 100755
--- a/t/t3206-range-diff.sh
+++ b/t/t3206-range-diff.sh
@@ -110,7 +110,7 @@ test_expect_success 'changed commit' '
 	      14
 	4:  a63e992 ! 4:  d966c5c s/12/B/
 	    @@ -8,7 +8,7 @@
-	     @@
+	     @@ A
 	      9
 	      10
 	    - B
@@ -169,7 +169,7 @@ test_expect_success 'changed commit with sm config' '
 	      14
 	4:  a63e992 ! 4:  d966c5c s/12/B/
 	    @@ -8,7 +8,7 @@
-	     @@
+	     @@ A
 	      9
 	      10
 	    - B
@@ -231,7 +231,7 @@ test_expect_success 'dual-coloring' '
 	:      14<RESET>
 	:<RED>4:  d966c5c <RESET><YELLOW>!<RESET><GREEN> 4:  8add5f1<RESET><YELLOW> s/12/B/<RESET>
 	:    <REVERSE><CYAN>@@ -8,7 +8,7 @@<RESET>
-	:    <CYAN> @@<RESET>
+	:    <CYAN> @@ A<RESET>
 	:      9<RESET>
 	:      10<RESET>
 	:    <REVERSE><RED>-<RESET><FAINT> BB<RESET>
-- 
2.22.0.510.g264f2c817a


  parent reply	other threads:[~2019-07-05 17:07 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20190414210933.20875-1-t.gummerer@gmail.com/>
2019-07-05 17:06 ` [PATCH v2 00/14] output improvements for git range-diff Thomas Gummerer
2019-07-05 17:06   ` [PATCH v2 01/14] apply: replace marc.info link with public-inbox Thomas Gummerer
2019-07-05 17:06   ` [PATCH v2 02/14] apply: only pass required data to skip_tree_prefix Thomas Gummerer
2019-07-05 17:06   ` [PATCH v2 03/14] apply: only pass required data to git_header_name Thomas Gummerer
2019-07-05 17:06   ` [PATCH v2 04/14] apply: only pass required data to check_header_line Thomas Gummerer
2019-07-05 17:06   ` [PATCH v2 05/14] apply: only pass required data to find_name_* Thomas Gummerer
2019-07-05 17:06   ` [PATCH v2 06/14] apply: only pass required data to gitdiff_* functions Thomas Gummerer
2019-07-05 18:51     ` Johannes Schindelin
2019-07-05 17:06   ` [PATCH v2 07/14] apply: make parse_git_header public Thomas Gummerer
2019-07-05 18:48     ` Johannes Schindelin
2019-07-05 17:06   ` [PATCH v2 08/14] range-diff: fix function parameter indentation Thomas Gummerer
2019-07-05 17:06   ` [PATCH v2 09/14] range-diff: split lines manually Thomas Gummerer
2019-07-05 19:05     ` Johannes Schindelin
2019-07-08 11:24       ` Thomas Gummerer
2019-07-05 17:06   ` Thomas Gummerer [this message]
2019-07-05 19:09     ` [PATCH v2 10/14] range-diff: don't remove funcname from inner diff Johannes Schindelin
2019-07-05 17:06   ` [PATCH v2 11/14] range-diff: suppress line count in outer diff Thomas Gummerer
2019-07-05 17:06   ` [PATCH v2 12/14] range-diff: add section header instead of diff header Thomas Gummerer
2019-07-05 19:35     ` Johannes Schindelin
2019-07-08 11:44       ` Thomas Gummerer
2019-07-08 13:12         ` Johannes Schindelin
2019-07-05 17:06   ` [PATCH v2 13/14] range-diff: add filename to inner diff Thomas Gummerer
2019-07-05 17:06   ` [PATCH v2 14/14] range-diff: add headers to the outer hunk header Thomas Gummerer
2019-07-05 19:48   ` [PATCH v2 00/14] output improvements for git range-diff Johannes Schindelin
2019-07-08 11:45     ` Thomas Gummerer
2019-07-08 16:33   ` [PATCH v3 " Thomas Gummerer
2019-07-08 16:33     ` [PATCH v3 01/14] apply: replace marc.info link with public-inbox Thomas Gummerer
2019-07-08 16:33     ` [PATCH v3 02/14] apply: only pass required data to skip_tree_prefix Thomas Gummerer
2019-07-08 16:33     ` [PATCH v3 03/14] apply: only pass required data to git_header_name Thomas Gummerer
2019-07-08 16:33     ` [PATCH v3 04/14] apply: only pass required data to check_header_line Thomas Gummerer
2019-07-08 16:33     ` [PATCH v3 05/14] apply: only pass required data to find_name_* Thomas Gummerer
2019-07-08 16:33     ` [PATCH v3 06/14] apply: only pass required data to gitdiff_* functions Thomas Gummerer
2019-07-08 16:33     ` [PATCH v3 07/14] apply: make parse_git_header public Thomas Gummerer
2019-07-09 19:39       ` Junio C Hamano
2019-07-09 21:23         ` Thomas Gummerer
2019-07-09 23:22           ` Junio C Hamano
2019-07-10  8:48             ` Thomas Gummerer
2019-07-08 16:33     ` [PATCH v3 08/14] range-diff: fix function parameter indentation Thomas Gummerer
2019-07-08 16:33     ` [PATCH v3 09/14] range-diff: split lines manually Thomas Gummerer
2019-07-08 16:33     ` [PATCH v3 10/14] range-diff: don't remove funcname from inner diff Thomas Gummerer
2019-07-08 16:33     ` [PATCH v3 11/14] range-diff: suppress line count in outer diff Thomas Gummerer
2019-07-08 16:33     ` [PATCH v3 12/14] range-diff: add section header instead of diff header Thomas Gummerer
2019-07-08 16:33     ` [PATCH v3 13/14] range-diff: add filename to inner diff Thomas Gummerer
2019-07-08 16:33     ` [PATCH v3 14/14] range-diff: add headers to the outer hunk header Thomas Gummerer
2019-07-11 16:08     ` [PATCH v4 00/14] output improvements for git range-diff Thomas Gummerer
2019-07-11 16:08       ` [PATCH v4 01/14] apply: replace marc.info link with public-inbox Thomas Gummerer
2019-07-11 16:08       ` [PATCH v4 02/14] apply: only pass required data to skip_tree_prefix Thomas Gummerer
2019-07-11 16:08       ` [PATCH v4 03/14] apply: only pass required data to git_header_name Thomas Gummerer
2019-07-11 16:08       ` [PATCH v4 04/14] apply: only pass required data to check_header_line Thomas Gummerer
2019-07-11 16:08       ` [PATCH v4 05/14] apply: only pass required data to find_name_* Thomas Gummerer
2019-07-11 16:08       ` [PATCH v4 06/14] apply: only pass required data to gitdiff_* functions Thomas Gummerer
2019-07-11 16:08       ` [PATCH v4 07/14] apply: make parse_git_diff_header public Thomas Gummerer
2019-07-11 16:08       ` [PATCH v4 08/14] range-diff: fix function parameter indentation Thomas Gummerer
2019-07-11 16:08       ` [PATCH v4 09/14] range-diff: split lines manually Thomas Gummerer
2019-07-11 16:08       ` [PATCH v4 10/14] range-diff: don't remove funcname from inner diff Thomas Gummerer
2019-07-11 16:08       ` [PATCH v4 11/14] range-diff: suppress line count in outer diff Thomas Gummerer
2019-07-11 16:08       ` [PATCH v4 12/14] range-diff: add section header instead of diff header Thomas Gummerer
2019-07-11 16:08       ` [PATCH v4 13/14] range-diff: add filename to inner diff Thomas Gummerer
2019-07-11 16:08       ` [PATCH v4 14/14] range-diff: add headers to the outer hunk header Thomas Gummerer
2019-07-11 22:09       ` [PATCH v4 00/14] output improvements for git range-diff Ramsay Jones
2019-07-12 10:44       ` Johannes Schindelin

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