working with Deployer

	# deployedCommits for https://deployer.org/
	# created by marjuqi, nov 2019
	# 1. this script is designed to fetch commits in each releases folder.
	# the final output will be stored in file deployedCommits.log
	# 2. in the beginning of the setup, just create a dump latestCommitID.log file:
	# cd /var/www/sites/PROJECT_NAME/ && echo 123456789 > latestCommitID.log

	# go to the currect version of the codes
	projectFolder=/var/www/sites/PROJECT_NAME/
	cd $projectFolder'current/'

	# extract 50 latest commits from the source code and then store them into file commits.log
	git log –pretty=oneline \| grep -v "Merge" \| head -n 50 > commits.log

	# get the commitID in the first line of commits.log content and then store it into latestCommitID.log
	head -1 commits.log \| awk '{print $1}' > latestCommitID.log

	# get latestCommitID as a commits limit
	cd $projectFolder && latestCommitID=`cat latestCommitID.log`

	# fetch new commits ID from the current deployment until the commits-limit reached,
	# and then stored them into deployedCommits.log file
	cd $projectFolder'current' && sed "/$latestCommitID/q" commits.log > deployedCommits.log

	# update our latestCommitID.log, now it holds the very latest commit ID
	cp -a latestCommitID.log $projectFolder'latestCommitID.log'

	# in the end, every release folder has a file called "deployedCommits.log"
	# thanks.