Bug 255518 – [GLib] Add introspectable API to configure experimental features at runtime

• Status: RESOLVED
• Resolution: FIXED
• Component: WebKit API

[Adrian Perez]

We would like to have something similar like the JSCOptions API,
but for WebKit, likely attached to the WebKitSettings class. It
should allow to:

 1. Enumerate available features which can be toggled at run time
    (their names, default value, current value, etc).
 2. Toggle values programmatically :)

The above would allow to have e.g. a development menu like Safari
Tech Preview in the Minibrowser and (if desired) in Epiphany, or
maybe even command line options to let people easily preview
features which are in development.

[Adrian Perez]

This should be useful to easily try in-development features as well,
like for example the SVG LBSE (bug #90738) -- we've had people more
than once ask to be able to toggle features at runtime, so they do
not need to locally patch GTK/WPE port builds to try out things.

[Adrian Perez]

Pull request: https://github.com/WebKit/WebKit/pull/12824

[EWS]

Committed 263331@main (760e6a2591cf): <https://commits.webkit.org/263331@main>

Reviewed commits have been landed. Closing PR #12824 and removing active labels.

[Radar WebKit Bug Importer]

<rdar://problem/108468818>

[Diego Pino]

Debian Stable bot is failing after this patch with the following build error:

https://build.webkit.org/#/builders/46/builds/29638

```
../../Tools/MiniBrowser/gtk/main.c:377:9: error: ‘G_OPTION_ENTRY_NULL’ undeclared (first use in this function); did you mean ‘G_OPTION_ARG_NONE’?
  377 |         G_OPTION_ENTRY_NULL
      |         ^~~~~~~~~~~~~~~~~~~
      |         G_OPTION_ARG_NONE
```

Macro 'G_OPTION_ENTRY_NULL' is only defined since glib 2.70 but Debian Stable only includes glib 2.66

[Diego Pino]

Re-opening for pull request https://github.com/webkit/webkit/pull/13265

[EWS]

Committed 263707@main (f407ecf491e1): <https://commits.webkit.org/263707@main>

Reviewed commits have been landed. Closing PR #13265 and removing active labels.