Add an optional argument for --color options
Make git-branch, git-show-branch, git-grep, and all the diff-based
programs accept an optional argument <when> for --color. The argument
is a colorbool: "always", "never", or "auto". If no argument is given,
"always" is used; --no-color is an alias for --color=never. This makes
the command-line interface consistent with other GNU tools, such as `ls'
and `grep', and with the git-config color options. Note that, without
an argument, --color and --no-color work exactly as before.
To implement this, two internal changes were made:
1. Allow the first argument of git_config_colorbool() to be NULL,
in which case it returns -1 if the argument isn't "always", "never",
or "auto".
2. Add OPT_COLOR_FLAG(), OPT__COLOR(), and parse_opt_color_flag_cb()
to the option parsing library. The callback uses
git_config_colorbool(), so color.h is now a dependency
of parse-options.c.
Signed-off-by: Mark Lodato <lodatom@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/parse-options.c b/parse-options.c
index d218122..c83035d 100644
--- a/parse-options.c
+++ b/parse-options.c
@@ -2,6 +2,7 @@
#include "parse-options.h"
#include "cache.h"
#include "commit.h"
+#include "color.h"
static int parse_options_usage(const char * const *usagestr,
const struct option *opts);
@@ -599,6 +600,21 @@
return 0;
}
+int parse_opt_color_flag_cb(const struct option *opt, const char *arg,
+ int unset)
+{
+ int value;
+
+ if (!arg)
+ arg = unset ? "never" : (const char *)opt->defval;
+ value = git_config_colorbool(NULL, arg, -1);
+ if (value < 0)
+ return opterror(opt,
+ "expects \"always\", \"auto\", or \"never\"", 0);
+ *(int *)opt->value = value;
+ return 0;
+}
+
int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
int unset)
{
