[wp-meta] [Making WordPress.org] #6538: wporg-markdown importer - Support GitHub branches not named `master`

[Making WordPress.org]

#6538: wporg-markdown importer - Support GitHub branches not named `master`
--------------------------------+--------------------
 Reporter:  netweb              |      Owner:  (none)
     Type:  defect (bug)        |     Status:  new
 Priority:  normal              |  Milestone:
Component:  WordPress.org Site  |   Keywords:
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 Currently the `get_markdown_edit_link()` function hard codes the GitHub
 `edit` link to `master`:
 ([https://github.com/WordPress/wordpress.org/blob/trunk/wordpress.org/public_html
 /wp-content/plugins/wporg-markdown/inc/class-editor.php#L178-L190 Source])

 {{{
                 if ( 'github.com' !== parse_url( $markdown_source,
 PHP_URL_HOST )
                         || false !== stripos( $markdown_source,
 '/edit/master/' ) ) {
                         return $markdown_source;
                 }
                 $markdown_source = str_replace( '/blob/master/',
 '/edit/master/', $markdown_source );
 }}}


 Discovered after merging https://github.com/WordPress/WordPress-
 Documentation-Style-Guide/pull/20 where the default branch is `main`,
 prior to merging the above PR the GitHub "edit" URL on pages were in the
 form:

 - `https://github.com/WordPress/WordPress-Documentation-Style-
 Guide/edit/master/docs/2-general-guidelines/6-facts-claims.md`
   - (Via the https://make.wordpress.org/docs/style-guide/general-
 guidelines/facts-claims/ page)

 The above URL format 404s as the `master` branch no longer exists on
 GitHub

 The new "edit" URL on pages is:
 - `https://github.com/WordPress/WordPress-Documentation-Style-
 Guide/main/docs/2-general-guidelines/6-facts-claims.md`
   - (Via the https://make.wordpress.org/docs/style-guide/general-
 guidelines/facts-claims/ page)

 And as such the URL doesn't include `/edit/main`, just `/main`, so the URL
 opens correctly just not in the previous "edit" mode.

 My suggestion would be to update the above function to account for common
 dotorg repo branch names used: `trunk`, `main`, and `master`

-- 
Ticket URL: <https://meta.trac.wordpress.org/ticket/6538>
Making WordPress.org <https://meta.trac.wordpress.org/>
Making WordPress.org