Script for switching a project to use a git clone of a Drupal contrib module

gistfile1.txt

#!/usr/bin/env bash

# Script for switching a project to use a git clone of a Drupal contrib module.

if [ ! -d repos/$1 ]; then
  # Get the version of the module that the project currently has installed
  # so we can clone the same version. This ensures that Composer will accept to
  # install it.
  VERSION=`php -r "require_once 'vendor/autoload.php'; print \Composer\InstalledVersions::getReference('drupal/$1');"`

  # Create a git clone.
  cd repos
  git clone -b $VERSION https://git.drupalcode.org/project/$1.git

  cd ..
fi

# Add a Composer path repository that points to the git clone.
composer config repositories.$1 path repos/$1

# Switch the project to use the git clone.
composer require drupal/$1 '*'

# You can now go to the git clone and switch to a feature branch.