[PATCH 2/3] config: add git_config_from_sha1() to read from a blob

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 config.c |   34 ++++++++++++++++++++++++++++++++++
 1 files changed, 34 insertions(+), 0 deletions(-)

diff --git a/config.c b/config.c
index c8bf46f..e7a9ff4 100644
--- a/config.c
+++ b/config.c
@@ -809,6 +809,40 @@ int git_config_from_file(config_fn_t fn, const char *filename, void *data)
 	return ret;
 }
 
+static int git_config_from_sha1(config_fn_t fn, const char *sha1_name, void *data)
+{
+	unsigned char sha1[20];
+	enum object_type type;
+	unsigned long size;
+	int ret;
+
+	if (get_sha1(sha1_name, sha1)) {
+		error("bad shared config reference '%s'", sha1_name);
+		return -1;
+	}
+
+	config_file = read_sha1_file(sha1, &type, &size);
+	if (!config_file) {
+		error("bad shared config '%s'", sha1_name);
+		return -1;
+	}
+	if (type == OBJ_BLOB) {
+		config_file_pos = 0;
+		config_file_size = size;
+		config_file_name = sha1_name;
+		config_linenr = 1;
+		config_file_eof = 0;
+		ret = git_parse_file(fn, data);
+	}
+	else {
+		error("shared config '%s' is not a blob", sha1_name);
+		return -1;
+	}
+	free(config_file);
+	config_file_name = NULL;
+	return ret;
+}
+
 const char *git_etc_gitconfig(void)
 {
 	static const char *system_wide;
-- 
1.7.3.3.476.g893a9