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[PATCH 1/3] for-each-ref: let upstream/push optionally report the remote name




There are times when e.g. scripts want to know not only the name of the
upstream branch on the remote repository, but also the name of the
remote.

This patch offers the new suffix :remote for the upstream and for the
push atoms, allowing to show exactly that. Example:

	$ cat .git/config
	...
	[remote "origin"]
		url = https://where.do.we.come/from
		fetch = refs/heads/*:refs/remote/origin/*
	[remote "hello-world"]
		url = https://hello.world/git
		fetch = refs/heads/*:refs/remote/origin/*
		pushURL = hello.world:git
		push = refs/heads/*:refs/heads/*
	[branch "master"]
		remote = origin
		pushRemote = hello-world
	...

	$ git for-each-ref \
		--format='%(upstream) %(upstream:remote) %(push:remote)' \
		refs/heads/master
	refs/remotes/origin/master origin hello-world

Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
---
 Documentation/git-for-each-ref.txt | 16 +++++++++-------
 ref-filter.c                       | 25 +++++++++++++++++++++----
 2 files changed, 30 insertions(+), 11 deletions(-)

diff --git a/Documentation/git-for-each-ref.txt b/Documentation/git-for-each-ref.txt
index 66b4e0a4050..776368ee531 100644
--- a/Documentation/git-for-each-ref.txt
+++ b/Documentation/git-for-each-ref.txt
@@ -140,17 +140,19 @@ upstream::
 	(behind), "<>" (ahead and behind), or "=" (in sync). `:track`
 	also prints "[gone]" whenever unknown upstream ref is
 	encountered. Append `:track,nobracket` to show tracking
-	information without brackets (i.e "ahead N, behind M").  Has
-	no effect if the ref does not have tracking information
-	associated with it.  All the options apart from `nobracket`
-	are mutually exclusive, but if used together the last option
-	is selected.
+	information without brackets (i.e "ahead N, behind M").  Also
+	respects `:remote-name` to state the name of the *remote* instead of
+	the ref.
++
+Has no effect if the ref does not have tracking information associated
+with it.  All the options apart from `nobracket` are mutually exclusive,
+but if used together the last option is selected.
 
 push::
 	The name of a local ref which represents the `@{push}`
 	location for the displayed ref. Respects `:short`, `:lstrip`,
-	`:rstrip`, `:track`, and `:trackshort` options as `upstream`
-	does. Produces an empty string if no `@{push}` ref is
+	`:rstrip`, `:track`, `:trackshort` and `:remote-name` options as
+	`upstream` does. Produces an empty string if no `@{push}` ref is
 	configured.
 
 HEAD::
diff --git a/ref-filter.c b/ref-filter.c
index bc591f4f3de..58d53c09390 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -76,7 +76,9 @@ static struct used_atom {
 		char color[COLOR_MAXLEN];
 		struct align align;
 		struct {
-			enum { RR_REF, RR_TRACK, RR_TRACKSHORT } option;
+			enum {
+				RR_REF, RR_TRACK, RR_TRACKSHORT, RR_REMOTE_NAME
+			} option;
 			struct refname_atom refname;
 			unsigned int nobracket : 1;
 		} remote_ref;
@@ -156,6 +158,8 @@ static void remote_ref_atom_parser(const struct ref_format *format, struct used_
 			atom->u.remote_ref.option = RR_TRACKSHORT;
 		else if (!strcmp(s, "nobracket"))
 			atom->u.remote_ref.nobracket = 1;
+		else if (!strcmp(s, "remote-name"))
+			atom->u.remote_ref.option = RR_REMOTE_NAME;
 		else {
 			atom->u.remote_ref.option = RR_REF;
 			refname_atom_parser_internal(&atom->u.remote_ref.refname,
@@ -1247,6 +1251,15 @@ static void fill_remote_ref_details(struct used_atom *atom, const char *refname,
 			*s = ">";
 		else
 			*s = "<>";
+	} else if (atom->u.remote_ref.option == RR_REMOTE_NAME) {
+		int explicit;
+		const char *remote = starts_with(atom->name, "push") ?
+			pushremote_for_branch(branch, &explicit) :
+			remote_for_branch(branch, &explicit);
+		if (explicit)
+			*s = xstrdup(remote);
+		else
+			*s = "";
 	} else
 		die("BUG: unhandled RR_* enum");
 }
@@ -1364,9 +1377,13 @@ static void populate_value(struct ref_array_item *ref)
 				continue;
 			branch = branch_get(branch_name);
 
-			refname = branch_get_push(branch, NULL);
-			if (!refname)
-				continue;
+			if (starts_with(name, "push:remote-"))
+				refname = NULL;
+			else {
+				refname = branch_get_push(branch, NULL);
+				if (!refname)
+					continue;
+			}
 			fill_remote_ref_details(atom, refname, branch, &v->s);
 			continue;
 		} else if (starts_with(name, "color:")) {
-- 
2.14.2.windows.1