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# Composer template for Drupal projects

[![CI](https://github.com/drupal-composer/drupal-project/actions/workflows/ci.yml/badge.svg?branch=9.x)](https://github.com/drupal-composer/drupal-project/actions/workflows/ci.yml)

This project template provides a starter kit for managing your site
dependencies with [Composer](https://getcomposer.org/).

## Usage

First you need to [install Composer](https://getcomposer.org/doc/00-intro.md#installation-linux-unix-osx).

> Note: The instructions below refer to the [global Composer installation](https://getcomposer.org/doc/00-intro.md#globally).
You might need to replace `composer` with `php composer.phar` (or similar)
for your setup.

After that you can create the project:

```
composer create-project drupal-composer/drupal-project:9.x-dev some-dir --no-interaction
```

With `composer require ...` you can download new dependencies to your
installation.

```
cd some-dir
composer require drupal/devel
```

The `composer create-project` command passes ownership of all files to the
project that is created. You should create a new Git repository, and commit
all files not excluded by the `.gitignore` file.

## What does the template do?

When installing the given `composer.json` some tasks are taken care of:

* Drupal will be installed in the `web`-directory.
* Autoloader is implemented to use the generated composer autoloader in `vendor/autoload.php`,
instead of the one provided by Drupal (`web/vendor/autoload.php`).
* Modules (packages of type `drupal-module`) will be placed in `web/modules/contrib/`
* Theme (packages of type `drupal-theme`) will be placed in `web/themes/contrib/`
* Profiles (packages of type `drupal-profile`) will be placed in `web/profiles/contrib/`
* Creates default writable versions of `settings.php` and `services.yml`.
* Creates `web/sites/default/files`-directory.
* Latest version of drush is installed locally for use at `vendor/bin/drush`.
* Latest version of DrupalConsole is installed locally for use at `vendor/bin/drupal`.
* Creates environment variables based on your .env file. See [.env.example](.env.example).

## Updating Drupal Core

This project will attempt to keep all of your Drupal Core files up-to-date; the
project [drupal/core-composer-scaffold](https://github.com/drupal/core-composer-scaffold)
is used to ensure that your scaffold files are updated every time drupal/core is
updated. If you customize any of the "scaffolding" files (commonly `.htaccess`),
you may need to merge conflicts if any of your modified files are updated in a
new release of Drupal core.

Follow the steps below to update your core files.

1. Run `composer update "drupal/core-*" --with-dependencies` to update Drupal Core and its dependencies.
2. Run `git diff` to determine if any of the scaffolding files have changed.
Review the files for any changes and restore any customizations to
`.htaccess` or `robots.txt`.
1. Commit everything all together in a single commit, so `web` will remain in
sync with the `core` when checking out branches or running `git bisect`.
1. In the event that there are non-trivial conflicts in step 2, you may wish
to perform these steps on a branch, and use `git merge` to combine the
updated core files with your customized files. This facilitates the use
of a [three-way merge tool such as kdiff3](http://www.gitshah.com/2010/12/how-to-setup-kdiff-as-diff-tool-for-git.html). This setup is not necessary if your changes are simple;
keeping all of your modifications at the beginning or end of the file is a
good strategy to keep merges easy.

## FAQ

### Should I commit the contrib modules I download?

Composer recommends **no**. They provide [argumentation against but also
workrounds if a project decides to do it anyway](https://getcomposer.org/doc/faqs/should-i-commit-the-dependencies-in-my-vendor-directory.md).

### Should I commit the scaffolding files?

The [Drupal Composer Scaffold](https://github.com/drupal/core-composer-scaffold)
plugin can download the scaffold files (like index.php, update.php, …) to the
web/ directory of your project. If you have not customized those files you could
choose to not check them into your version control system (e.g. git). If that is
the case for your project it might be convenient to automatically run the
drupal-scaffold plugin after every install or update of your project. You can
achieve that by registering `@composer drupal:scaffold` as post-install and
post-update command in your composer.json:

```json
"scripts": {
"post-install-cmd": [
"@composer drupal:scaffold",
"..."
],
"post-update-cmd": [
"@composer drupal:scaffold",
"..."
]
},
```

### How can I apply patches to downloaded modules?

If you need to apply patches (depending on the project being modified, a pull
request is often a better solution), you can do so with the
[composer-patches](https://github.com/cweagans/composer-patches) plugin.

To add a patch to drupal module foobar insert the patches section in the extra
section of composer.json:

```json
"extra": {
"patches": {
"drupal/foobar": {
"Patch description": "URL or local path to patch"
}
}
}
```

### How do I specify a PHP version ?

This project supports PHP 7.3 as minimum version (see [Environment requirements of Drupal 9](https://www.drupal.org/docs/understanding-drupal/how-drupal-9-was-made-and-what-is-included/environment-requirements-of)), however it's possible that a `composer update` will upgrade some package that will then require PHP 7.3+.

To prevent this you can add this code to specify the PHP version you want to use in the `config` section of `composer.json`:

```json
"config": {
"sort-packages": true,
"platform": {
"php": "7.3.19"
}
},
```