Deployment script for a given (git, versioned Drupal project) tag

deploy_myproject_tag.sh

#!/bin/bash

#########################
### Deployment script ###
#########################

APP_PATH="/var/www/myproject/www"
APP_URL="www.myproject.com"
APP_POST_DEPLOY_SCRIPT="$APP_PATH/scripts/myproject_update.sh"

#########################

command -v drush >/dev/null 2>&1 || { echo >&2 "Drush required."; exit 1; }
command -v git   >/dev/null 2>&1 || { echo >&2 "Git required."; exit 1; }

if [ ! -d $APP_PATH ]; then
        echo "Directory $APP_PATH does not exist."
        exit 1
fi

cd $APP_PATH

# fetch new tags
git fetch --tags

# determine tag to deploy
if [ $# -eq 0 ]; then
        last_tag=$(git describe)
        echo "Tag not defined as argument. Please type the tag to deploy."
        echo -n "> [${last_tag}]"
        read use_tag
        if [[ "$use_tag" == "" ]]; then
                use_tag=$last_tag
        fi
else
        use_tag=$1
fi

# test tag existence
if ! git show-ref --tags --quiet --verify -- "refs/tags/$use_tag" ; then
        echo "The tag \"$use_tag\" does not exist. Try again !"
        exit 1
fi

if [ ! -f "$(pwd)/.deploy_noconfirm" ]; then
        echo "/!\\ You are about to deploy tag \"$use_tag\". Type \"yes\" to confirm. /!\\"
        echo 'Note : create an empty ".deploy_noconfirm" file in your homedir to bypass this confirmation.'
        echo -n "> "
        read answer

        if [[ "$answer" != "yes" ]]; then
                echo "Ok ok. Just leaving."
                exit 1
        fi
else
        echo 'Warning : file .deploy_noconfirm present ! Type Ctrl+C to stop deployment.'
        for i in $(seq $TIMER_DEPLOY | sort -r); do
                echo "$i seconds to go..."
                sleep 1
        done
fi

git checkout $use_tag

# Stop deploy if git repo not sync'ed
if [[ "$?" != "0" ]]; then
        echo "Git pull failed ! Deployment interrupted."
        exit 1
fi

# Launch post deployment app-specific script
bash -x $APP_POST_DEPLOY_SCRIPT