feat: add option to skip composer install

[alexislefebvre]

I’m currently testing Gitea Actions and the fastest way I found to run php-cs-fixer is to run it without dependencies. (the syntax of Gitea Actions is based on GitHub Actions so it may look familiar)

    php-cs-fixer:
        name: 🧹 PHP-CS-Fixer
        runs-on: ubuntu-latest

        steps:
            -   name: Checkout
                uses: https://github.com/actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1

            -   name: ✅ PHP-CS-Fixer
                uses: docker://jakzal/phpqa:1.116.0-php8.4-alpine
                with:
                    args: php-cs-fixer --config=./.qa/.php-cs-fixer.dist.php --dry-run --diff --no-interaction --ansi --show-progress=none fix
                env:
                    CI: false

I rely on this line to skip composer install:

phpqa/Dockerfile

Line 209 in e144e1c

(test "\$GITHUB_ACTIONS" = "true" || test "\$CI" = "true") && test -f composer.json && composer install --no-scripts --no-progress --quiet

But I don’t like having to write GITHUB_ACTIONS since it’s a Gitea Actions (it may also be a GitLab CI job), and writing CI looks weird since this is still a CI job.

So I propose to add an env var to skip it with an explicit name.

---

Proof that php-cs-fixer works without dependencies

$ git clone git@github.com:liip/LiipTestFixturesBundle.git
$ cd LiipTestFixturesBundle/
$ docker run --rm -it --volume .:/app --workdir /app jakzal/phpqa:1.116.2-php8.4-alpine php-cs-fixer \
--config=./.qa/.php-cs-fixer.dist.php --dry-run --diff --no-interaction --ansi --show-progress=none fix
…

PHP CS Fixer 3.92.0 (7b15cb5) Exceptional Exception by Fabien Potencier, Dariusz Ruminski and contributors.
PHP runtime: 8.4.15
Loaded config default from "./.qa/.php-cs-fixer.dist.php".
Running analysis on 1 core sequentially.
You can enable parallel runner and speed up the analysis! Please see usage docs for more information.
Using cache file ".php-cs-fixer.cache".

Found 0 of 64 files that can be fixed in 0.002 seconds, 11.34 MB memory used

[alexislefebvre]

I haven’t used GitLab CI for a long time but this should work: https://docs.gitlab.com/ci/variables/#define-a-cicd-variable-in-the-gitlab-ciyml-file