Branching with SVN

svn-branch.sh

# Retrieve repository URL
function svn-url() {
	LANG=en_US svn info "$1" | grep '^URL *:' | sed 's/^URL *: //'
}

# Branching
function svn-branch() {
	if [ ! -d .svn ]; then return 1; fi
	if svn-url | grep '/trunk' &> /dev/null; then
		echo trunk
	elif svn-url | grep '/branches/[^/]*' &> /dev/null; then
		echo "$(svn-url | grep -o '/branches/[^/]*' | sed 's/\/branches\/\(.*\)\/\?/\1/')"
	fi
}

# Switch to branch (or list with if no parameter)
function svn-switch() {
	branch="$(svn-branch)"
	errmsg=""
	url=""
	if [ "$1" = "" ]; then
		errmsg="Branch name (or 'trunk') expected"
	elif [ "$1" = "$branch" ]; then
		errmsg="Already in branch '$branch'"
	elif [ "$branch" = "trunk" ]; then
		url="$(svn-url | sed "s/\/trunk\(\/\?\)/\/branches\/$1\1/")"
	elif [ "$branch" != "" ]; then
		if [ "$1" = "trunk" ]; then
			url="$(svn-url | sed "s/\/branches\/[^\/]*\(\/\?\)/\/trunk\1/")"
		else
			url="$(svn-url | sed "s/\/branches\/[^\/]*\(\/\?\)/\/branches\/$1\1/")"
		fi
	fi
	if [ "$errmsg" = "" -a "$url" != "" ]; then
		if ! svn ls "$url" &> /dev/null; then
			errmsg="Branch '$1' not found"
		else
			echo "From: '$(svn-url)'"
			echo "To:   '$url'"
			echo -n "Switch now (y/n) ? [y] "
			read v
			if [ "$v" = "" -o "$v" = "y" -o "$v" = "Y" ]; then
				svn switch "$url"
			else
				errmsg="Interrupted by user"
			fi
		fi
	fi
	if [ "$errmsg" != "" ]; then
		echo "Error: $errmsg" > /dev/stderr
		echo "Available branches (currently '$branch'):" > /dev/stderr
		svn ls $(svn-url | sed 's/\/\(trunk\|branches\)\/.*/\/branches/') | while read b; do
			echo " * ${b:0:$(($#b-1))}" > /dev/stderr
		done
		return 1
	fi
}