Allow installing a specific Composer version

[mlocati]

---

name: ⚙ Improvement
about: What about letting users specify a specific Composer version
labels: enhancement

---

Description

This PR let users specify a specific Composer version. This is useful in particular to test Composer plugins which should support old Composer versions.

• I have written test cases for the changes in this pull request
• I have run npm run format before the commit.
• I have run npm run lint before the commit.
• I have run npm run release before the commit.
• npm test returns with no unit test errors and all code covered.
• I have checked the edited scripts for syntax.
• I have tested the changes in an integration test - see https://github.com/mlocati/composer-patcher/actions/runs/337536137

[mlocati]

This script is successful for me:

npm ci
npm run format-check

[mlocati]

This script is successful for me:

Whoops, I forgot to push the changes... see the force push

[mlocati]

It seems that the automatic creation of dist/index.js on my Windows machines mangled the new line characters

[mlocati]

It seems that the automatic creation of dist/index.js on my Windows machines mangled the new line characters

In order to fix that I had to run

git config core.autocrlf true

[mlocati]

About this check:

I have tested the changes in an integration test (If yes, provide workflow link).

How can I test it? What about adding a note about that in https://github.com/shivammathur/setup-php/blob/master/.github/CONTRIBUTING.md ?

[mlocati]

About this check:

I have tested the changes in an integration test (If yes, provide workflow link).

How can I test it? What about adding a note about that in https://github.com/shivammathur/setup-php/blob/master/.github/CONTRIBUTING.md ?

I managed to answer myself:

1. create a GitHub repository
2. create a GitHub Action in it
3. in the YAML file, specify <organization>/<repository>@<branch> instead of shivammathur/setup-php@v2

For example, to test this PR, I used

    steps:
      - name: Setup PHP
        uses: mlocati/setup-php@composer-specific-version
        with:
          php-version: "7.2"
          coverage: none
          tools: composer:v1.7.2

[shivammathur]

@mlocati Sorry for a bit of a delay, I have merged this and refactored a bit of it.
It should now work on develop branch, will be in v2 in next release.

- name: Setup PHP
   uses: shivammathur/setup-php@develop
   with:
     php-version: '7.2'
     tools: 'composer:1.7.2'

I will update CONTRIBUTING.md to make it more clear.

[mlocati]

Sorry for a bit of a delay

I wouldn't call that a delay, you are super fast! 😉