This is a bash script to release new version of the current wp-theme-cc-chapter theme with all the needed dependencies

release.sh

#!/bin/bash
#
# This script generates a release zip file from the WordPress theme of the CC Chapter websites
# useful for standaolone installs

set -o errexit
set -o errtrace
set -o nounset

trap '_es=${?};
    printf "${0}: line ${LINENO}: \"${BASH_COMMAND}\"";
    printf " exited with a status of ${_es}\n";
    exit ${_es}' ERR

BASE_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"

echo "Check dependencies..."

#Check if git is installed
if hash git 2>/dev/null; then
    echo ">> Git ok"
else 
    echo "[ERROR] Cannot find Git installed. Please install before proceed" 1>&2
    exit 1
fi
#Check if node / npm is installed
if hash git 2>/dev/null; then
    echo ">> Node / npm ok"
else 
    echo "[ERROR] Cannot find NodeJS installed. Please install before proceed" 1>&2
    exit 1
fi
#Check if composer is installed
if hash git 2>/dev/null; then
    echo ">> Composer ok"
else 
    echo "[ERROR] Cannot find NodeJS installed. Please install before proceed" 1>&2
    exit 1
fi

mkdir -p release
cd release

mkdir -p themes
cd themes
echo "Cloning repository ... "
git clone git@github.com:creativecommons/wp-theme-cc-chapter.git

cd wp-theme-cc-chapter
composer install

cd "${BASE_DIR}"
cp queulat.php release/mu-plugins/
cd release
zip -r wp-theme-cc-chapter.zip .
 

Echo errors to stdout and use a non-zero exit status. For example:

    echo "[ERROR] Cannot find Git installed. Please install before proceed" 1>&2
    exit 1

I use 4 spaces instead of 2 spaces for Bash

Whenever you mkdir consider using -p in case it already exists for some reason:

mkdir -p release