[wp-trac] [WordPress Trac] #44492: Add new --dev flag to allow building and cleaning /src again.

[WordPress Trac]

#44492: Add new --dev flag to allow building and cleaning /src again.
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 Reporter:  omarreiss         |       Owner:  atimmer
     Type:  enhancement       |      Status:  closed
 Priority:  normal            |   Milestone:  5.1
Component:  Build/Test Tools  |     Version:
 Severity:  normal            |  Resolution:  fixed
 Keywords:  needs-testing     |     Focuses:
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Changes (by atimmer):

 * owner:  (none) => atimmer
 * status:  new => closed
 * resolution:   => fixed


Comment:

 In [changeset:"44359" 44359]:
 {{{
 #!CommitTicketReference repository="" revision="44359"
 Build tools: Allow building WordPress to `src`.

 After the JavaScript reorganization in [43309], it was no longer possible
 to test WordPress from the `src` folder. That meant a build step was
 required to test PHP modifications. That is suboptimal as even a simple
 copy is slower than a web server just serving the new file.

 We achieve building to `src` by setting a `WORKING_DIR` constant in the
 Gruntfile that is `build` by default, but changes to `src` when the
 `--dev` flag is present on any Grunt command. We provide sensible defaults
 so some commands, such as copying `version.php`, always build to `build`.

 Because testing from `build` is no longer required, we change the messages
 present in `index.php` and `wp-admin/index.php` to be more broadly about
 building WordPress.

 We also change the webpack config to have more straightforward behavior
 based on the `buildTarget` argument. It only determines the build target
 now and has no implicit behavior anymore. `grunt build` still works as it
 worked before, to make sure that the build server produces the same
 `wordpress.zip` we are used to.

 We do all this instead of a symlink setup because symlinks don't work on
 every platform.

 Props omarreiss, netweb, flixos90, SergeyBiryukov.
 Fixes #44492.
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/44492#comment:23>
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