[PATCH v2 3/3] for-each-ref: introduce %(color:...) for color

[Ramkumar Ramachandra <artagnon@gmail.com>]

Enhance 'git for-each-ref' with color formatting options.  You can now
use the following format in for-each-ref:

  %(color:green)%(refname:short)%(color:reset)

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
---
 Documentation/git-for-each-ref.txt |  4 ++++
 builtin/for-each-ref.c             | 13 +++++++++++--
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/Documentation/git-for-each-ref.txt b/Documentation/git-for-each-ref.txt
index c9b192e..2f3ac22 100644
--- a/Documentation/git-for-each-ref.txt
+++ b/Documentation/git-for-each-ref.txt
@@ -101,6 +101,10 @@ HEAD::
 	Used to indicate the currently checked out branch.  Is '*' if
 	HEAD points to the current ref, and ' ' otherwise.
 
+color::
+	Used to change color of output.  Followed by `:<colorname>`,
+	where names are described in `color.branch.*`.
+
 In addition to the above, for commit and tag objects, the header
 field names (`tree`, `parent`, `object`, `type`, and `tag`) can
 be used to specify the value in the header field.
diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c
index ed81407..c59fffe 100644
--- a/builtin/for-each-ref.c
+++ b/builtin/for-each-ref.c
@@ -9,6 +9,7 @@
 #include "quote.h"
 #include "parse-options.h"
 #include "remote.h"
+#include "color.h"
 
 /* Quoting styles */
 #define QUOTE_NONE 0
@@ -76,6 +77,7 @@ static struct {
 	{ "symref" },
 	{ "flag" },
 	{ "HEAD" },
+	{ "color" },
 };
 
 /*
@@ -662,8 +664,9 @@ static void populate_value(struct refinfo *ref)
 			    !branch->merge[0]->dst)
 				continue;
 			refname = branch->merge[0]->dst;
-		}
-		else if (!strcmp(name, "flag")) {
+		} else if (!prefixcmp(name, "color")) {
+			;
+		} else if (!strcmp(name, "flag")) {
 			char buf[256], *cp = buf;
 			if (ref->flag & REF_ISSYMREF)
 				cp = copy_advance(cp, ",symref");
@@ -729,6 +732,12 @@ static void populate_value(struct refinfo *ref)
 				else
 					v->s = "<>";
 				continue;
+			} else if (!prefixcmp(name, "color")) {
+				char color[COLOR_MAXLEN] = "";
+
+				color_parse(formatp, "--format", color);
+				v->s = xstrdup(color);
+				continue;
 			} else
 				die("unknown %.*s format %s",
 				    (int)(formatp - name), name, formatp);
-- 
1.8.5.rc0.3.g914176d.dirty