aliases: Fix gfrb/gfrbi with slash-delimited branches

Multi-part branch names would be incorrectly split on the last slash and
not the first, causing these aliases to do the wrong thing. These need
the remote name which is the first element. Everything after the first
slash is the branch name, not the last slash.

Signed-off-by: Joe Groocock <me@frebib.net>

aliases

@@ -139,8 +139,8 @@ alias grbc="grb --continue"
 alias grbsk="grb --skip"
 alias grbsh="grb --show-current"
 alias grbom="git rebase \"origin/\$(git defbranch)\""
-gfrb() { remote="${1%/*}"; git fetch "$remote" && git rebase "$@"; }
-gfrbi() { remote="${1%/*}"; git fetch "$remote" && git rebase -i "$@"; }
+gfrb() { remote="${1%%/*}"; git fetch "$remote" && git rebase "$@"; }
+gfrbi() { remote="${1%%/*}"; git fetch "$remote" && git rebase -i "$@"; }
 
 alias gam="git am"
 alias gama="git am --abort"

git/config

@@ -37,8 +37,23 @@
 	count = !echo $(pwd) && git rev-list HEAD --count
 	unpushed = !git log --oneline @{u}..HEAD
 	leaders = !git shortlog -s -n --all --no-merges
-	defbranch = !git symbolic-ref refs/remotes/origin/HEAD | sed \"s@^refs/remotes/origin/@@\"
-	cleanmerged = !git branch --merged \"origin/$(git defbranch)\" | grep -ve \"^\\\\*\" -e \"^. $(git defbranch)$\" | xargs -r git branch -d
+	defbranch = "!defbranch() { \
+		r=\"${1:-origin}\"; \
+		{ \
+			git symbolic-ref \"refs/remotes/$r/HEAD\" || { \
+				git remote set-head \"$r\" -a >&2 && \
+				git symbolic-ref \"refs/remotes/$r/HEAD\"; \
+			}; \
+		} 2>/dev/null \
+			| sed \"s@^refs/remotes/$r/@@\"; \
+	}; defbranch"
+	cleanmerged = "!cleanmerged() { \
+		r=\"${1:-origin}\"; \
+		b=\"${2:-$(git defbranch \"$r\")}\"; \
+		git branch --merged \"$r/$b\" | \
+			grep -ve \"^\\\\*\" -e \"^. $b$\" | \
+			xargs -r git branch -d; \
+	}; cleanmerged"
 [advice]
 	statusHints = false
 	pushUpdateRejected = false