WordPress: Install Advanced Custom Fields (Pro) with Composer

composer.json

{
	"type" : "project",
	"minimum-stability": "dev",
	"prefer-stable": true,
	"config": {
	  "secure-http": false
	},
	"repositories" : [
		{
			"type" :"composer",
			"url" :"https://wpackagist.org"
		},
		{
			"type": "package",
			"package": {
				"name": "advanced-custom-fields/advanced-custom-fields-pro",
				"version": "dev-master",
				"type": "wordpress-plugin",
				"dist": {
					"type": "zip",
					"url": "https://connect.advancedcustomfields.com/index.php?p=pro&a=download&k=<your license key>"
				}
			}
		}
	],
	"require" : {
		"composer/installers" : "*",
		"johnpbloch/wordpress" : "*",
		"wpackagist-plugin/advanced-custom-fields" : "*",
		"advanced-custom-fields/advanced-custom-fields-pro" : "*"
	},
	"extra" : {
		"wordpress-install-dir" : "web/wp",
		"installer-paths" : {
			"web/wp-content/mu-plugins/{$name}/" : ["type:wordpress-muplugin"],
			"web/wp-content/plugins/{$name}/" : ["type:wordpress-plugin"],
			"web/wp-content/themes/{$name}/" : ["type:wordpress-theme"]
		}
	}
}

You could try my composer plugin (https://github.com/PhilippBaschke/acf-pro-installer) if you do not want to commit your license key. 😊