#!/bin/bash

#This hook launches after a branch change, or branch checkout. It cannot affect
#the outcome of a git switch or git checkout with the exception that the hook
#exit status becomes the exit status of the antecedent command
#See https://git-scm.com/docs/githooks#_post_checkout

if [[ -L "$0" ]]; then
    #If our launched script is a link, grab the root
    hookRoot="$(dirname $(readlink --canonicalize "$0"))"
else
    #Otherwise use the launched script directory
    hookRoot="$(dirname "$0")"
fi

if [[ "$1" == "$2" ]]; then
    #Previous HEAD and new HEAD are the same, ignore
    exit 0
fi

if [[ "$3" == '1' ]]; then
    #A branch checkout will always be flagged as 1, and a file checkout as 0
    "${hookRoot}/update_editor.sh" $0
fi