[wp-trac] [WordPress Trac] #54470: Add support to read WP_TESTS_PHPUNIT_POLYFILLS_PATH from environment variables

[WordPress Trac]

#54470: Add support to read WP_TESTS_PHPUNIT_POLYFILLS_PATH from environment
variables
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 Reporter:  shivammathur      |      Owner:  (none)
     Type:  enhancement       |     Status:  new
 Priority:  normal            |  Milestone:  Awaiting Review
Component:  Build/Test Tools  |    Version:  trunk
 Severity:  normal            |   Keywords:
  Focuses:                    |
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 I would like to add support to read the `WP_TESTS_PHPUNIT_POLYFILLS_PATH`
 from an environment variable.

 Currently one has to define the `WP_TESTS_PHPUNIT_POLYFILLS_PATH` as a PHP
 constant. In a CI setup like GitHub Actions, this can be done only once
 the WordPress test suite has been installed.

 Adding support for reading this from an environment variable would allow
 setup-php GitHub Action to set this variable as it is mostly run before
 the WordPress test suite is installed.

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Ticket URL: <https://core.trac.wordpress.org/ticket/54470>
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