Dynamic Dockerfile? ARGS? possible? Worth doing?

[joemaller]

We could use env vars for the WordPress and PHP versions to build the desired image, something like:

ARG WP_VERSION=5
ARG PHP_VERSION=8-apache

ARG BASE_IMAGE=wordpress:${WP_VERSION}-php${PHP_VERSION}

# $BASE_IMAGE will be something like `wordpress:5.9.1-php8.0-apache`
# and would fallback to wordpress:5-php8-apache
FROM $BASE_IMAGE

Can these pull from the environment? Config in package.json?

References:

• https://docs.docker.com/engine/reference/builder/#arg
• https://www.jeffgeerling.com/blog/2017/use-arg-dockerfile-dynamic-image-specification

[joemaller]

This is mostly working from the bump-wp shell script, but it would be pretty easy to add the PHP version from boilerplate-composer.json

docker-wordpress-dev/src/boilerplate-composer.json

Lines 7 to 10 in b27e270

	"platform": {
	"php": "8.0",
	"ext-intl": "0"
	}