From: Jacob Keller <jacob.keller@xxxxxxxxx>
This will be used by a future patch which implements a diff mode for
submodule display. Without this, the diff output would incorrectly
display when using both -p and --graph during a git-log.
Signed-off-by: Jacob Keller <jacob.keller@xxxxxxxxx>
---
As suggested by Junio, I implemented --line-prefix to enable the graph
display correctly. This works by a neat trick of adding to the msgbuf,
so no code needs to be altered. I presumed that the line prefix should
go *after* the graphs own prefix.
Documentation/diff-options.txt | 3 +++
diff.c | 12 +++++++++++-
diff.h | 1 +
3 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index 705a87394200..e7b729f3644f 100644
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -569,5 +569,8 @@ endif::git-format-patch[]
--no-prefix::
Do not show any source or destination prefix.
+--line-prefix=<prefix>::
+ Prepend an additional prefix to every diff output line.
+
For more detailed explanation on these common options, see also
linkgit:gitdiffcore[7].
diff --git a/diff.c b/diff.c
index b43d3dd2ecb7..6fe5c6d084a3 100644
--- a/diff.c
+++ b/diff.c
@@ -1167,10 +1167,16 @@ const char *diff_get_color(int diff_use_color, enum color_diff ix)
const char *diff_line_prefix(struct diff_options *opt)
{
struct strbuf *msgbuf;
+
if (!opt->output_prefix)
- return "";
+ if (opt->line_prefix)
+ return opt->line_prefix;
+ else
+ return "";
msgbuf = opt->output_prefix(opt, opt->output_prefix_data);
+ if (opt->line_prefix)
+ strbuf_addstr(msgbuf, opt->line_prefix);
return msgbuf->buf;
}
@@ -3966,6 +3972,10 @@ int diff_opt_parse(struct diff_options *options,
options->a_prefix = optarg;
return argcount;
}
+ else if ((argcount = parse_long_opt("line-prefix", av, &optarg))) {
+ options->line_prefix = optarg;
+ return argcount;
+ }
else if ((argcount = parse_long_opt("dst-prefix", av, &optarg))) {
options->b_prefix = optarg;
return argcount;
diff --git a/diff.h b/diff.h
index 125447be09eb..6a91a1139686 100644
--- a/diff.h
+++ b/diff.h
@@ -115,6 +115,7 @@ struct diff_options {
const char *pickaxe;
const char *single_follow;
const char *a_prefix, *b_prefix;
+ const char *line_prefix;
unsigned flags;
unsigned touched_flags;
--
2.9.2.872.g0b694e0.dirty
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