Symlink deployments to prevent any downtime whilst files are uploaded and an application is being used

deploy.sh

BASE="/var/www/project"; RELEASES="$BASE/releases"; RELEASE="$RELEASES/1234567890"; SHARED="$BASE/shared"; CACHE="$BASE/deploy-cache"

if [[ `uname` == 'Darwin' ]]; then COPY="cp -a"; else COPY="cp -a"; fi
$COPY $CACHE $RELEASE
cd $RELEASE

####### [Pre-launch commands] #######
composer install -va
####### [/Pre-launch commands] #######

if [ $? -ne 0 ]; then echo "Pre-launch commands failed."; exit 1; fi

rm -f $RELEASES/current; ln -s $RELEASE $RELEASES/current; mv -f $RELEASES/current $BASE/
cd $RELEASE

####### [Post-launch commands] #######

####### [/Post-launch commands] #######

if [ $? -ne 0 ]; then echo "Post-launch commands failed, but the current application symlink was updated."; exit 1; fi

echo "Cleaning up old releases"
\ls -1d $RELEASES/* | \sort -rg | \tail -n +11 | \xargs /bin/rm -rf