Laravel Envoyer hook to run migrations in a sane manner

laravel_envoyer_migrations_like_a_boss.sh

# Application base directory
site= "example.com"

# Navigate to the release being deployed.
cd {{ release }}

# Number of migrations in the new release
releaseMigrations= ls database/migrations | wc -l

# Number of migrations in the current production app
currentMigrations= ls ${site}/current/database/migrations | wc -l

# If there are more migrations in the new release than on production
if [ ${releaseMigrations} -gt ${currentMigrations} ]; then
    # Exit on error
    set -e

    # Function to be run in trap before exit
    # So that production comes back up on migration errors
    function beforeExit {
        (cd ${site}/current && php artisan up)
    }

    # Lock down the production app instance before making DB changes
    (cd ${site}/current && php artisan down)

    # Run the migrations
    php artisan migrate --force

    # Bring production back online
    (cd ${site}/current && php artisan up)

    # Keep track of the last command executed
    trap 'lastCommand=$thisCommand; thisCommand=$BASH_COMMAND' DEBUG

    # If any command exits with a non-zero status
    if [ $? -ne 0 ]; then
        # echo error then run beforeExit to bring production back up before exit
        trap 'echo "\"${lastCommand}\" command failed with exit code $?." && beforeExit' EXIT
    else
        echo 'New migrations completed successfully'
    fi
else
    echo "No migrations detected"
fi

You may use the existing project hook variable to replace site.

Documentation on Hook Variables