gitでcommit/pushされたファイルの内容をリモートリポジトリ側でvalidationしてOKだったらdeployする ref: http://qiita.com/yuyarin/items/3e335bc461839da3ea6a

deploy_hoge

#!/bin/sh
FILE=hoge.conf
LOCAL_DIR=/home/hoge/work/hoge
REMOTE_DIR=/etc/hoged
REMOTE_USER=hoge
REMOTE_HOSTS="hoge1 hoge2 hoge3 hoge4"
for REMOTE_HOST in $REMOTE_HOSTS
do
    CMD="scp ${LOCAL_DIR}/${FILE} ${REMOTE_USER}@${REMOTE_HOST}:${REMOTE_DIR}/${FILE}"
    echo $CMD
    eval $CMD
done

file4.txt

/home/yuyarin/hoge$ git commit -am 'Add string hoge'
[master 8519468] Add string hoge
 1 file changed, 1 insertion(+)
/home/yuyarin/hoge$ git push origin master
Counting objects: 5, done.
Writing objects: 100% (3/3), 232 bytes | 0 bytes/s, done.
Total 3 (delta 0), reused 0 (delta 0)
remote: validation error
remote: error: hook declined to update refs/heads/master
To hoge@server1:/repos/hoge.git
 ! [remote rejected] master -> master (hook declined)
error: failed to push some refs to 'hoge@server1:/repos/hoge.git'

file5.txt

/home/yuyarin/hoge$ vim hoge.conf              
/home/yuyarin/hoge$ git commit -am 'Remove strings hoge'    
[master 3af7194] Remove strings hoge
 1 file changed, 1 insertion(+), 2 deletions(-)
/home/yuyarin/hoge$ git push origin master
Counting objects: 8, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (2/2), done.
Writing objects: 100% (6/6), 428 bytes | 0 bytes/s, done.
Total 6 (delta 0), reused 0 (delta 0)
remote: validation OK
remote: scp /home/hoge/work/hoge.conf hoge@hoge1:/etc/hoged/hoge.conf
remote: scp /home/hoge/work/hoge.conf hoge@hoge2:/etc/hoged/hoge.conf
remote: scp /home/hoge/work/hoge.conf hoge@hoge3:/etc/hoged/hoge.conf
remote: scp /home/hoge/work/hoge.conf hoge@hoge4:/etc/hoged/hoge.conf
To hoge@server1:/repos/hoge.git
   e5aa890..3af7194  master -> master

post-receive

#!/bin/sh
cd /home/hoge/work/hoge
git --git-dir=.git pull /repos/hoge.git master
/usr/local/bin/deploy-hoge

update

#!/bin/sh
git show $3:hoge.conf | /usr/local/bin/validate_hoge

validate_hoge

#!ruby
fd = ARGV[0] and File.exists?(ARGV[0]) ? File::open(ARGV[0], 'r') : STDIN
while line = fd.gets
    if /hoge/ =~ line
        puts "validation ERROR"
        exit 1
    end
end
puts "validation OK"
exit 0