Capistrano like post-receive git hook

post-receive

#!/bin/bash

ROOT='/home/git/testing'
BRANCH='master'
MAX_RELEASES=5

RELEASE=$(date +%s)

while read oldrev newrev refname
do
    branch=$(git rev-parse --symbolic --abbrev-ref $refname)
    if [ "$BRANCH" == "$branch" ]; then
        # create new release
        mkdir -p "$ROOT/releases/$RELEASE"
        git archive $branch | tar -x -f - -C "$ROOT/releases/$RELEASE"

        # all customizations should be placed here
        # such as running composer, migrations, etc.

        # create symlink to the last release
        ln -s "$ROOT/releases/$RELEASE" "$ROOT/releases/current"
        mv "$ROOT/releases/current" "$ROOT/"
            
        # delete old releases
        OLD_RELEASES=$(ls -1 "$ROOT/releases" | sort -h | head -n -$MAX_RELEASES)
        for OLD in $OLD_RELEASES; do
            rm -rf "$ROOT/releases/$OLD"
        done
    fi  
done