From 20690b213975ad3e9b1bc851f434d818bd2d1de9 Mon Sep 17 00:00:00 2001
From: Ross Lagerwall <rosslagerwall@gmail.com>
Date: Sat, 18 Feb 2017 00:23:41 +0000
Subject: [PATCH] remote: ignore failure to remove missing branch.<name>.merge

It is not all too unusual for a branch to use "branch.<name>.remote"
without "branch.<name>.merge".  You may be using the 'push.default'
configuration set to 'current', for example, and do

    $ git checkout -b side colleague/side
    $ git config branch.side.remote colleague

However, "git remote rm" to remove the remote used in such a manner
fails with

    "fatal: could not unset 'branch.<name>.merge'"

because it assumes that a branch that has .remote defined must also
have .merge defined.  Detect the "cannot unset because it is not set
to begin with" case and ignore it.

Signed-off-by: Ross Lagerwall <rosslagerwall@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 builtin/remote.c  |  4 +++-
 t/t5505-remote.sh | 19 +++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/builtin/remote.c b/builtin/remote.c
index e52cf3925b..01055b7272 100644
--- a/builtin/remote.c
+++ b/builtin/remote.c
@@ -769,7 +769,9 @@ static int rm(int argc, const char **argv)
 				strbuf_reset(&buf);
 				strbuf_addf(&buf, "branch.%s.%s",
 						item->string, *k);
-				git_config_set(buf.buf, NULL);
+				result = git_config_set_gently(buf.buf, NULL);
+				if (result && result != CONFIG_NOTHING_SET)
+					die(_("could not unset '%s'"), buf.buf);
 			}
 		}
 	}
diff --git a/t/t5505-remote.sh b/t/t5505-remote.sh
index 8198d8eb05..f558ad0b39 100755
--- a/t/t5505-remote.sh
+++ b/t/t5505-remote.sh
@@ -153,6 +153,25 @@ test_expect_success 'remove errors out early when deleting non-existent branch'
 	)
 '
 
+test_expect_success 'remove remote with a branch without configured merge' '
+	test_when_finished "(
+		git -C test checkout master;
+		git -C test branch -D two;
+		git -C test config --remove-section remote.two;
+		git -C test config --remove-section branch.second;
+		true
+	)" &&
+	(
+		cd test &&
+		git remote add two ../two &&
+		git fetch two &&
+		git checkout -b second two/master^0 &&
+		git config branch.second.remote two &&
+		git checkout master &&
+		git remote rm two
+	)
+'
+
 test_expect_success 'rename errors out early when deleting non-existent branch' '
 	(
 		cd test &&