[PATCH] Teach remote machinery about core.origin config variable

[Mark Levedahl <mlevedahl@gmail.com>]

This introduces a new configuration variable, core.origin, that
defines the name of the default remote to be used. Traditionally, this
is "origin", and could be overridden for a given branch. This change
introduces a way to redefine the default as desired and have that honored
regardless of the currently checked out head (e.g., core.origin is
used when on a detached head or any other non-tracking branch).

Signed-off-by: Mark Levedahl <mlevedahl@gmail.com>
---
 Documentation/config.txt |    6 ++++++
 git-parse-remote.sh      |    5 +++--
 remote.c                 |   11 ++++++++++-
 3 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/Documentation/config.txt b/Documentation/config.txt
index 1b6d6d6..a0bdf14 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -291,6 +291,12 @@ core.editor::
 	`GIT_EDITOR` environment, `core.editor`, `VISUAL` and
 	`EDITOR` environment variables and then finally `vi`.
 
+core.origin::
+	The name of the remote used by default for fetch / pull. If unset,
+	origin is assumed. This value is used whenever the current branch
+	has no corresponding branch.<name>.remote, such as when working on
+	a detached head.
+
 core.pager::
 	The command that git will use to paginate output.  Can be overridden
 	with the `GIT_PAGER` environment variable.
diff --git a/git-parse-remote.sh b/git-parse-remote.sh
index 695a409..c7ac7c7 100755
--- a/git-parse-remote.sh
+++ b/git-parse-remote.sh
@@ -56,8 +56,9 @@ get_remote_url () {
 
 get_default_remote () {
 	curr_branch=$(git symbolic-ref -q HEAD | sed -e 's|^refs/heads/||')
-	origin=$(git config --get "branch.$curr_branch.remote")
-	echo ${origin:-origin}
+	git config --get "branch.$curr_branch.remote" ||
+	git config --get "core.origin" ||
+	echo origin
 }
 
 get_remote_default_refs_for_push () {
diff --git a/remote.c b/remote.c
index 0e00680..302d499 100644
--- a/remote.c
+++ b/remote.c
@@ -10,6 +10,7 @@ static int allocated_branches;
 
 static struct branch *current_branch;
 static const char *default_remote_name;
+static const char *core_origin;
 
 #define BUF_SIZE (2048)
 static char buffer[BUF_SIZE];
@@ -233,6 +234,11 @@ static int handle_config(const char *key, const char *value)
 			add_merge(branch, xstrdup(value));
 		return 0;
 	}
+	if (!strcmp(key, "core.origin")) {
+		if (value)
+			core_origin = xstrdup(value);
+		return 0;
+	}
 	if (prefixcmp(key,  "remote."))
 		return 0;
 	name = key + 7;
@@ -291,7 +297,6 @@ static void read_config(void)
 	int flag;
 	if (default_remote_name) // did this already
 		return;
-	default_remote_name = xstrdup("origin");
 	current_branch = NULL;
 	head_ref = resolve_ref("HEAD", sha1, 0, &flag);
 	if (head_ref && (flag & REF_ISSYMREF) &&
@@ -300,6 +305,10 @@ static void read_config(void)
 			make_branch(head_ref + strlen("refs/heads/"), 0);
 	}
 	git_config(handle_config);
+	if (!default_remote_name) {
+		default_remote_name = core_origin ?
+		core_origin : xstrdup("origin");
+	}
 }
 
 struct refspec *parse_ref_spec(int nr_refspec, const char **refspec)
-- 
1.5.4.rc2.98.g1f3d5