script.sh

#
# -r - delete remote branch
# -d - debug mode
#

MAINBRANCH="main"
EXTENTIONS=("_current" "_dev")

DELETE_REMOTE_MODE=false
DEGUG_MODE=false

ALL_BRANCHES=$(git show-ref --heads | sed 's/.*refs\/heads\///')

merged_branches=()

while getopts 'rd' flag; do
	case ${flag} in
	r) DELETE_REMOTE_MODE=true ;;
	d) DEGUG_MODE=true ;;
	esac
done


is_merged_to_master() {
    for merged_branch in $(git for-each-ref --merged=origin/$MAINBRANCH --format="%(refname:short)" refs/heads/); do
		if [[ "$merged_branch" == "$1" ]]; then
			true
			return
		fi
	done
	false 
	return
}

delete_local_branch() {
	if $DEGUG_MODE 
	then
		echo "delete $1 locally!"
	else 
		git branch -d $1
	fi
}

delete_remote_branch() {
	if $DEGUG_MODE 
	then
		echo "delete $1 remotely!"
	else 
		git push origin --delete $1
	fi
}


for branch in $ALL_BRANCHES; do
 if [[ "$branch" != "$MAINBRANCH" ]] 
 then
    if is_merged_to_master "$branch" 
	then
		echo "$branch: Merged"
		merged_branches+=($branch)
	else 
		echo "$branch is not merged"
 	fi 
 fi
done

for checked_branch in ${merged_branches[@]}; do
	is_task_branch_deleted=false
	for extention in ${EXTENTIONS[@]}; do
		if [[ "$checked_branch" == *"$extention"* ]]; 
		then
			if $DELETE_REMOTE_MODE
			then
				delete_local_branch $checked_branch
				delete_remote_branch $checked_branch
			else
				delete_local_branch $checked_branch
			fi
			
			if ! $is_task_branch_deleted 
			then
				end_index=$((${#checked_branch}-${#extention}))

				if $DELETE_REMOTE_MODE
				then
					if is_merged_to_master "${checked_branch:0:$end_index}" 
					then
						delete_local_branch ${checked_branch:0:$end_index}
						delete_remote_branch ${checked_branch:0:$end_index}
					fi 	
				else
					if is_merged_to_master "${checked_branch:0:$end_index}" 
					then
						delete_local_branch ${checked_branch:0:$end_index}
					fi
				fi
			fi 		
		fi
		is_task_branch_deleted=true
	done
done
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