[wp-trac] [WordPress Trac] #43558: Add `composer.json` file for development dependencies (was: Add composer.json file)

[WordPress Trac]

#43558: Add `composer.json` file for development dependencies
------------------------------+------------------------
 Reporter:  clarinetlord      |       Owner:  pento
     Type:  enhancement       |      Status:  reviewing
 Priority:  normal            |   Milestone:  5.0
Component:  Build/Test Tools  |     Version:  trunk
 Severity:  normal            |  Resolution:
 Keywords:  has-patch         |     Focuses:
------------------------------+------------------------
Changes (by netweb):

 * keywords:   => has-patch
 * owner:   => pento
 * status:  reopened => reviewing
 * milestone:  Awaiting Review => 5.0


Comment:

 I discussed this with @pento today, and we are both in agreement in
 landing this for WP 5.0

 The [attachment:43558.diff] patch installs the following `require-dev`
 packages:

 * `squizlabs/php_codesniffer` - PHPCS
 * `wp-coding-standards/wpcs` WordPress PHP Coding Standards for - PHPCS
 * `dealerdirect/phpcodesniffer-composer-installer` - PHPCS ruleset
 installer

 Additional Composer ''`require-dev`'' packages can be considered in new
 tickets on a case-by-case basis.

 Related: #43218 PHPUnit 7.x support

 Related:
 [https://core.trac.wordpress.org/attachment/ticket/41057/41057-grunt.diff
 41057-grunt.diff]

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Ticket URL: <https://core.trac.wordpress.org/ticket/43558#comment:5>
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