Godot-proposals: Support --no-window on linux

[rcorre]

Describe the project you are working on:

Any godot project.

Describe the problem or limitation you are having in your project:

I use an external editor and would like to be alerted of syntax errors from within my editor. There is an open PR to add a script checking functionality to ALE, which works by invoking godot-server --check-only -s $script.

The issue is that it requires the godot server as the godot editor will pop up a window even if you pass --check-only -s. This means you have to install another separate binary just for linting.

There is a --no-window flag, but it only supports Windows.

Describe how this feature / enhancement will help you overcome this problem or limitation:

If --no-window worked on linux, it would make it easier to check scripts from the CLI, which is useful for both editor integration and CI/CD.

Show a mock up screenshots/video or a flow diagram explaining how your proposal will work:

$ godot --no-window --check-only -s my_script.gd
... errors/warnings here, but no GUI is spawned

Describe implementation detail for your proposal (in code), if possible:

If this enhancement will not be used often, can it be worked around with a few lines of script?:

Not as far as I'm aware.

Is there a reason why this should be core and not an add-on in the asset library?:

It is supported in core for Windows. It seems weird to have it be built in for one platform but an add-on for a different platform.

[Xrayez]

Somewhat similar use case but from the opposite side: see this snippet I've written for CI testing of Godot Engine with GUT. In there you have to treat --no-window option separately as it's not available for the server build (not needed), but I think it would be just better if it's ignored for the server build, and of course be implemented for other platforms.

[Jummit]

Isn't this more of a bug? I would expect command line arguments working on all platforms.

[rcorre]

Since it is documented in --help that the flag only works for Windows, I wasn't sure if it qualified as a bug.

On November 3, 2019 3:25:22 PM EST, Jummit [e-mail] wrote:

Isn't this more of a bug? I would expect command line arguments working
on all platforms.

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[akien-mga]

See also #991.

[rcorre]

Closing in favor of #991. I think the two motivations for this are:

1. Local script linting
2. Automated checks in CI

The former is now solved by the languageserver, and for the latter you can just install the server/headless build in CI.