Re: [PATCH] Add format-patch option --no-name-prefix.

[Johannes Schindelin <Johannes.Schindelin@gmx.de>]

Hi,

On Tue, 18 Dec 2007, Linus Torvalds wrote:

> But I obviously think the version by Dscho is better (exactly because it's 
> *not* enough to just clear the name prefix entirely), although I think 
> that one is broken too - using ':' to separate the prefixes is *not* 
> acceptable, since ':' is very possibly part of the prefix.
> 
> So I think you'd need separate arguments for the from/to prefixes, and not 
> try to shoehorn it into one argument. With possibly some simple form to 
> say "no prefix". So maybe something like
> 
>   --src-prefix=<string>		// default "a/"
>   --dst-prefix=<string>		// default "b/"
>   --no-prefix			// shorthand for --src-prefix="" --dst-prefix=""
> 
> would work for everybody?

If this is preferred, please squash this:

-- snipsnap --

 Documentation/diff-options.txt |   11 ++++++++---
 diff.c                         |   24 ++++++++++++++----------
 2 files changed, 22 insertions(+), 13 deletions(-)

diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index 672a2d0..0d3dccc 100644
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -211,9 +211,14 @@ endif::git-format-patch[]
 --no-ext-diff::
 	Disallow external diff drivers.
 
---prefix=<prefix1>[:<prefix2>]::
-	Show the given path prefixes instead of "a/" and "b/".  Leave
-	it empty to show no prefix at all.
+--src-prefix <prefix>::
+	Show the given source prefix instead of "a/".
+
+--dst-prefix <prefix>::
+	Show the given destination prefix instead of "b/".
+
+--no-prefix::
+	Do not show any source or destination prefix.
 
 For more detailed explanation on these common options, see also
 link:diffcore.html[diffcore documentation].
diff --git a/diff.c b/diff.c
index 095bbb5..9bc5fea 100644
--- a/diff.c
+++ b/diff.c
@@ -2317,16 +2317,20 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
 		else if (40 < options->abbrev)
 			options->abbrev = 40;
 	}
-	else if (!strcmp(arg, "--prefix=")) {
-		char *colon = strchr(arg + 9, ':');
-		options->a_prefix = arg + 9;
-		if (colon) {
-			*colon = '\0';
-			options->b_prefix = colon + 1;
-		}
-		else
-			options->b_prefix = options->a_prefix;
-	}
+	else if (!strcmp(arg, "--src-prefix")) {
+		if (ac < 2)
+			return error("--src-prefix needs a parameter");
+		options->a_prefix = arg + 1;
+		return 2;
+	}
+	else if (!strcmp(arg, "--dst-prefix")) {
+		if (ac < 2)
+			return error("--dst-prefix needs a parameter");
+		options->b_prefix = arg + 1;
+		return 2;
+	}
+	else if (!strcmp(arg, "--no-prefix"))
+		options->a_prefix = options->b_prefix = "";
 	else
 		return 0;
 	return 1;