deploy-gem.sh

#!/bin/bash
# 
#  Usage: deploy-gem.sh remote-host-name gem-name [branch]
#
#  NOTE: you can provide more than one remote hosts like
#     deploy-gem.sh rhost1,rhost2,rhost3 gem-name [branch]
#
#  if the branch is provided in the the following format 'master'
#  the sonian repository git@github.com:sonain/<gem-name>.git will be used
#
#  if the branch name contains the slash like 'repository/whatever-branch',
#  the following repository will be used
#  git@github.com:<repository>/<gem-name>.git
#
#  'branch' is optional, sonian/master will be used by default
#

REMOTE_HOST=$1
GEM_NAME=$2
GEM_BRANCH=$3
GEM_REPOSITORY="sonian"

if [ "$GEM_BRANCH" != "${GEM_BRANCH#*/}" ]; then
  GEM_REPOSITORY=${GEM_BRANCH%/*}
  GEM_BRANCH=${GEM_BRANCH#*/}
fi

# GEM_FILE=`ls ./pkg`
# GEM_VERSION=`basename $GEM_FILE .gem | cut -d- -f3`;

for host in `echo $REMOTE_HOST | sed -e 's/,/ /g'`; do
  ssh $host -A "rm -rf /tmp/$GEM_NAME; cd /tmp; \
    git clone git@github.com:${GEM_REPOSITORY}/${GEM_NAME}.git; \
    cd ${GEM_NAME}; git checkout origin/$GEM_BRANCH; rake gem; \
    sudo gem uninstall -a -x -I $GEM_NAME; \
    sudo gem install --no-ri --no-rdoc ./pkg/*.gem; \
    rm -rf /tmp/$GEM_NAME"
  if [ "$GEM_NAME" == "sa-backend" ]; then
    ssh $host "sudo sa-backend stop; \
               sudo -u sonian -i sa-backend start"
  fi
done