Sylius/travis/prepare/prepare-cached-composer

#!/bin/bash

# Argument 1: Dir with scripts
function main
{
    UNIQUE_KEY=$( text_md5sum $1 )

    before_hook $1

    if is_cache_fresh $UNIQUE_KEY; then
        restore_composer_lock_from_cache $UNIQUE_KEY
    else
        rebuild_cache_hook $1
        store_composer_lock_in_cache $UNIQUE_KEY
    fi

    after_hook $1
}

# Argument 1: Cache unique key
function store_composer_lock_in_cache
{
    cp composer.lock $SYLIUS_CACHE_DIR/composer-$1.lock
    file_md5sum 'composer.lock' > $SYLIUS_CACHE_DIR/composer-$1.lock.md5sum
}

# Argument 1: Cache unique key
function restore_composer_lock_from_cache
{
    cp $SYLIUS_CACHE_DIR/composer-$1.lock composer.lock
}

# Argument 1: Cache unique key
function is_cache_fresh
{
    if [ -f "$SYLIUS_CACHE_DIR/composer-$1.lock" ] && [ -f "$SYLIUS_CACHE_DIR/composer-$1.lock.md5sum" ] && [ file_md5sum 'composer.lock' -eq "`cat $SYLIUS_CACHE_DIR/composer-$1.lock.md5sum`" ]; then
        return 0
    else
        return 1
    fi
}

# Argument 1: String to hash
function text_md5sum
{
    echo $1 | md5sum | awk '{ print $1 }'
}

# Argument 1: File to hash
function file_md5sum
{
    md5sum $1 | awk '{ print $1 }'
}

# Argument 1: Dir with scripts
function before_hook
{
    if [ -f $1/1-before ]; then
        bash $1/1-before
    fi
}

# Argument 1: Dir with scripts
function rebuild_cache_hook
{
    if [ -f $1/2-rebuild-cache ]; then
        bash $1/2-rebuild-cache
    fi
}

# Argument 1: Dir with scripts
function after_hook
{
    if [ -f $1/3-after ]; then
        bash $1/3-after
    fi
}

if [ -z "$1" ]; then
    echo "Usage: $0 <dir with scripts>"
    exit 1
fi

main $1