From: "Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: Philippe Blain <levraiphilippeblain@gmail.com>,
Phillip Wood <phillip.wood123@gmail.com>,
Jeff King <peff@peff.net>,
Johannes Schindelin <johannes.schindelin@gmx.de>,
Johannes Schindelin <johannes.schindelin@gmx.de>
Subject: [PATCH v5 2/3] add -p: gracefully handle unparseable hunk headers in colored diffs
Date: Thu, 01 Sep 2022 15:42:18 +0000 [thread overview]
Message-ID: <93d0e3b4d2a3dec5588c6e41d69313385356aa8f.1662046939.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.1336.v5.git.1662046939.gitgitgadget@gmail.com>
From: Johannes Schindelin <johannes.schindelin@gmx.de>
In
https://lore.kernel.org/git/ecf6f5be-22ca-299f-a8f1-bda38e5ca246@gmail.com,
Phillipe Blain reported that the built-in `git add -p` command fails
when asked to use [`diff-so-fancy`][diff-so-fancy] to colorize the diff.
The reason is that this tool produces colored diffs with a hunk header
that does not contain any parseable `@@ ... @@` line range information,
and therefore we cannot detect any part in that header that comes after
the line range.
As proposed by Phillip Wood, let's take that for a clear indicator that
we should show the hunk headers verbatim. This is what the Perl version
of the interactive `add` command did, too.
[diff-so-fancy]: https://github.com/so-fancy/diff-so-fancy
Reported-by: Philippe Blain <levraiphilippeblain@gmail.com>
Helped-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
add-patch.c | 25 +++++++++++++++++--------
t/t3701-add-interactive.sh | 10 ++++++++++
2 files changed, 27 insertions(+), 8 deletions(-)
diff --git a/add-patch.c b/add-patch.c
index 34f3807ff32..a6bd150de51 100644
--- a/add-patch.c
+++ b/add-patch.c
@@ -238,6 +238,7 @@ struct hunk_header {
* include the newline.
*/
size_t extra_start, extra_end, colored_extra_start, colored_extra_end;
+ unsigned suppress_colored_line_range:1;
};
struct hunk {
@@ -358,15 +359,14 @@ static int parse_hunk_header(struct add_p_state *s, struct hunk *hunk)
if (!eol)
eol = s->colored.buf + s->colored.len;
p = memmem(line, eol - line, "@@ -", 4);
- if (!p)
- return error(_("could not parse colored hunk header '%.*s'"),
- (int)(eol - line), line);
- p = memmem(p + 4, eol - p - 4, " @@", 3);
- if (!p)
- return error(_("could not parse colored hunk header '%.*s'"),
- (int)(eol - line), line);
+ if (p && (p = memmem(p + 4, eol - p - 4, " @@", 3))) {
+ header->colored_extra_start = p + 3 - s->colored.buf;
+ } else {
+ /* could not parse colored hunk header, leave as-is */
+ header->colored_extra_start = hunk->colored_start;
+ header->suppress_colored_line_range = 1;
+ }
hunk->colored_start = eol - s->colored.buf + (*eol == '\n');
- header->colored_extra_start = p + 3 - s->colored.buf;
header->colored_extra_end = hunk->colored_start;
return 0;
@@ -659,6 +659,15 @@ static void render_hunk(struct add_p_state *s, struct hunk *hunk,
if (!colored) {
p = s->plain.buf + header->extra_start;
len = header->extra_end - header->extra_start;
+ } else if (header->suppress_colored_line_range) {
+ strbuf_add(out,
+ s->colored.buf + header->colored_extra_start,
+ header->colored_extra_end -
+ header->colored_extra_start);
+
+ strbuf_add(out, s->colored.buf + hunk->colored_start,
+ hunk->colored_end - hunk->colored_start);
+ return;
} else {
strbuf_addstr(out, s->s.fraginfo_color);
p = s->colored.buf + header->colored_extra_start;
diff --git a/t/t3701-add-interactive.sh b/t/t3701-add-interactive.sh
index 8a594700f7b..a94e7c53c8a 100755
--- a/t/t3701-add-interactive.sh
+++ b/t/t3701-add-interactive.sh
@@ -767,6 +767,16 @@ test_expect_success 'detect bogus diffFilter output' '
grep "mismatched output" output
'
+test_expect_success 'handle iffy colored hunk headers' '
+ git reset --hard &&
+
+ echo content >test &&
+ printf n >n &&
+ force_color git -c interactive.diffFilter="sed s/.*@@.*/XX/" \
+ add -p >output 2>&1 <n &&
+ grep "^XX$" output
+'
+
test_expect_success 'handle very large filtered diff' '
git reset --hard &&
# The specific number here is not important, but it must
--
gitgitgadget
next prev parent reply other threads:[~2022-09-01 15:42 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-23 18:04 [PATCH 0/3] built-in add -p: support diff-so-fancy better Johannes Schindelin via GitGitGadget
2022-08-23 18:04 ` [PATCH 1/3] t3701: redefine what is "bogus" output of a diff filter Johannes Schindelin via GitGitGadget
2022-08-23 18:04 ` [PATCH 2/3] add -p: gracefully ignore unparseable hunk headers in colored diffs Johannes Schindelin via GitGitGadget
2022-08-23 18:04 ` [PATCH 3/3] add -p: handle `diff-so-fancy`'s hunk headers better Johannes Schindelin via GitGitGadget
2022-08-24 3:49 ` [PATCH 0/3] built-in add -p: support diff-so-fancy better Philippe Blain
2022-08-24 6:27 ` Johannes Schindelin
2022-08-24 13:21 ` Philippe Blain
2022-08-24 17:49 ` Philippe Blain
2022-08-24 18:24 ` Junio C Hamano
2022-08-24 21:05 ` Johannes Schindelin
2022-08-24 21:37 ` Junio C Hamano
2022-08-24 21:21 ` [PATCH v2 0/4] " Johannes Schindelin via GitGitGadget
2022-08-24 21:21 ` [PATCH v2 1/4] t3701: redefine what is "bogus" output of a diff filter Johannes Schindelin via GitGitGadget
2022-08-24 21:21 ` [PATCH v2 2/4] add -p: gracefully ignore unparseable hunk headers in colored diffs Johannes Schindelin via GitGitGadget
2022-08-29 7:56 ` Junio C Hamano
2022-08-24 21:21 ` [PATCH v2 3/4] add -p: handle `diff-so-fancy`'s hunk headers better Johannes Schindelin via GitGitGadget
2022-08-29 8:06 ` Junio C Hamano
2022-08-29 13:32 ` Johannes Schindelin
2022-08-29 17:19 ` Junio C Hamano
2022-08-30 14:14 ` Johannes Schindelin
2022-08-24 21:21 ` [PATCH v2 4/4] add -p: ignore dirty submodules Johannes Schindelin via GitGitGadget
2022-08-24 22:11 ` [PATCH v2 0/4] built-in add -p: support diff-so-fancy better Junio C Hamano
2022-08-25 0:18 ` Philippe Blain
2022-08-26 11:43 ` Johannes Schindelin
2022-08-26 23:15 ` Philippe Blain
2022-08-29 15:11 ` [PATCH v3 0/5] " Johannes Schindelin via GitGitGadget
2022-08-29 15:11 ` [PATCH v3 1/5] t3701: redefine what is "bogus" output of a diff filter Johannes Schindelin via GitGitGadget
2022-08-30 13:17 ` Phillip Wood
2022-08-30 21:36 ` Junio C Hamano
2022-08-31 9:26 ` Phillip Wood
2022-08-31 15:36 ` Jeff King
2022-08-31 15:47 ` Jeff King
2022-08-31 19:57 ` Johannes Schindelin
2022-08-29 15:11 ` [PATCH v3 2/5] add -p: gracefully ignore unparseable hunk headers in colored diffs Johannes Schindelin via GitGitGadget
2022-08-29 15:11 ` [PATCH v3 3/5] add -p: insert space in colored hunk header as needed Johannes Schindelin via GitGitGadget
2022-08-29 15:11 ` [PATCH v3 4/5] add -p: handle `diff-so-fancy`'s hunk headers better Johannes Schindelin via GitGitGadget
2022-08-30 13:23 ` Phillip Wood
2022-08-29 15:11 ` [PATCH v3 5/5] add -p: ignore dirty submodules Johannes Schindelin via GitGitGadget
2022-08-30 13:26 ` Phillip Wood
2022-08-31 20:05 ` Johannes Schindelin
2022-08-31 20:19 ` Junio C Hamano
2022-08-31 20:38 ` Johannes Schindelin
2022-08-29 18:01 ` [PATCH v3 0/5] built-in add -p: support diff-so-fancy better Junio C Hamano
2022-08-30 14:22 ` Johannes Schindelin
2022-08-30 13:29 ` Phillip Wood
2022-08-31 20:44 ` Johannes Schindelin
2022-08-31 20:31 ` [PATCH v4 0/3] " Johannes Schindelin via GitGitGadget
2022-08-31 20:31 ` [PATCH v4 1/3] add -p: detect more mismatches between plain vs colored diffs Johannes Schindelin via GitGitGadget
2022-09-01 13:19 ` Phillip Wood
2022-08-31 20:31 ` [PATCH v4 2/3] add -p: gracefully handle unparseable hunk headers in " Johannes Schindelin via GitGitGadget
2022-09-01 13:53 ` Phillip Wood
2022-09-01 15:09 ` Johannes Schindelin
2022-08-31 20:31 ` [PATCH v4 3/3] add -p: ignore dirty submodules Johannes Schindelin via GitGitGadget
2022-09-01 15:45 ` Jeff King
2022-09-01 15:49 ` Jeff King
2022-09-01 16:17 ` Junio C Hamano
2022-09-02 8:53 ` Johannes Schindelin
2022-09-01 13:55 ` [PATCH v4 0/3] built-in add -p: support diff-so-fancy better Phillip Wood
2022-09-01 16:19 ` Junio C Hamano
2022-09-01 15:42 ` [PATCH v5 " Johannes Schindelin via GitGitGadget
2022-09-01 15:42 ` [PATCH v5 1/3] add -p: detect more mismatches between plain vs colored diffs Johannes Schindelin via GitGitGadget
2022-09-01 15:42 ` Johannes Schindelin via GitGitGadget [this message]
2022-09-01 16:03 ` [PATCH v5 2/3] add -p: gracefully handle unparseable hunk headers in " Phillip Wood
2022-09-01 15:42 ` [PATCH v5 3/3] add -p: ignore dirty submodules Johannes Schindelin via GitGitGadget
2022-09-01 16:55 ` Junio C Hamano
2022-09-01 16:04 ` [PATCH v5 0/3] built-in add -p: support diff-so-fancy better Phillip Wood
2022-09-01 16:54 ` Junio C Hamano
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