feature (git): add plugin functions for default branch and delete stale branch

plugins/available/git.plugin.bash

@@ -3,7 +3,7 @@ cite about-plugin
 about-plugin 'git helper functions'
 
 # shellcheck disable=SC2016
-function git_remote {
+function git_remote() {
 	about 'adds remote $GIT_HOSTING:$1 to current repo'
 	group "git"
 
@@ -11,7 +11,7 @@ function git_remote {
 	git remote add origin "${GIT_HOSTING}:${1}".git
 }
 
-function git_first_push {
+function git_first_push() {
 	about 'push into origin refs/heads/master'
 	group 'git'
 
@@ -158,7 +158,7 @@ function git_info() {
 	fi
 }
 
-function git_stats {
+function git_stats() {
 	about 'display stats per author'
 	group 'git'
 
@@ -314,3 +314,27 @@ function git-changelog() {
 		done
 	fi
 }
+
+function git-get-default-branch() {
+	about 'gets the default branch of the git repo'
+	group 'git'
+	example '$ git-get-default-branch'
+
+	echo $(basename $(git symbolic-ref refs/remotes/origin/HEAD))
+}
+
+function git-delete-stale-branch() {
+	about 'deletes the stale branch from git'
+	group 'git'
+	example '$ git-delete-stale-branch [--force|-f]'
+
+	local CURR_BRANCH
+	CURR_BRANCH=$(git branch | grep "*" | awk '{print $2}')
+
+	if [[ "$1" == "--force" ]] || [[ "$1" == "-f" ]]; then
+		git branch | grep -vE "$(git-get-default-branch)|$CURR_BRANCH" | xargs git branch -D
+	else
+		git branch | grep -vE "$(git-get-default-branch)|$CURR_BRANCH" | xargs git branch -d
+	fi
+
+}