git-jira: easily associate a ticket URL with a branch, allowing for quickly opening tickets in your browser

git-jira

#!/bin/bash
set -eo pipefail

refspec="+refs/jira/*:refs/jira/*"

function default_remote {
	git config jira.remote || {
		>&2 echo "No remote specified and no default configured."
		>&2 echo "Run \`git jira setup <REMOTE_NAME>\` to set a default remote."
		exit 1
	}
}

function current_branch {
	git rev-parse --abbrev-ref HEAD
}

function validate_url {
	url=$1
	regex='^http\(s\)\?:\/\/[a-z0-9_-]\+\.atlassian\.net\/browse\/[A-Z0-9]\+-[0-9]\+\/\?$'
	grep "$regex" <<< "$url" || {
		>&2 echo "Invalid ticket URL: $url"
		exit 1
	}
}

function associate {
	url=$1
	branch=${2:-$(current_branch)}

	if [ -z "$url" ]; then
		>&2 echo "Please specify a jira URL to associate with this branch"
		exit 1
	fi

	validate_url $url

	git hash-object -w --stdin <<< "$url" \
		| xargs git update-ref refs/jira/${branch}

	echo "$branch -> $url"
}

function open {
	branch=${1:-$(current_branch)}

	object=$(git rev-parse refs/jira/${branch} 2>/dev/null) || {
		>&2 echo "No jira URL has been associated with this branch!"
		>&2 echo "Try a \`git jira fetch\` and try again."
		exit 1
	}

	url=$(validate_url "$(git cat-file -p $object)")

	echo "Opening $url in your default browser"
	xdg-open $url >/dev/null & disown
}

function fetch {
	remote=${1:-$(default_remote)}
	git fetch $remote $refspec
}

function push {
	remote=${1:-$(default_remote)}
	git push $remote $refspec
}

function setup {
	remote=$1

	if [ -z "$remote" ]; then
		>&2 echo "Please specify a remote to fetch jira refs from (e.g., 'origin')"
		exit 1
	fi

	git config jira.remote $remote
	git config --add remote.${remote}.fetch $refspec
}

function invalid_subcommand {
	>&2 echo "$1 is not a valid git-jira subcommand."
	>&2 usage
	exit 1
}

function usage {
	echo "Usage:"
	echo "  git jira [open [BRANCH]]"
	echo "  git jira setup <REMOTE>"
	echo "  git jira associate <TICKET_URL> [BRANCH]"
	echo "  git jira fetch [REMOTE]"
	echo "  git jira push [REMOTE]"
	echo "  git jira help"
}

if [ -z "$1" ]; then
	subcommand=open
else
	subcommand=$1
	shift
fi

case $subcommand in
	"open")
		open $@
		;;
	"setup")
		setup $@
		;;
	"associate")
		associate $@
		;;
	"fetch")
		fetch $@
		;;
	"push")
		push $@
		;;
	"help")
		usage
		;;
	*)
		invalid_subcommand $subcommand
		;;
esac