feat: build caching

[Buckminsterfullerene02]

Description

Adds github action caching to the release actions. Currently it only works for xmake dependency downloads, so cuts down about 30% of the build time. Could not get it to work for incremental compiling though (tried adding --ccache=y to build target command, and adding build.cache policy in xmake.lua).

Type of change

• [x] New feature (non-breaking change which adds functionality)
• [x] Other... Github action

How Has This Been Tested?

Ran experimental action on branch a few times to check that the caching is being done properly.

Checklist

N/A

[bitonality]

(tried adding --ccache=y to build target command, and adding build.cache policy in `xmake.lua).

the ccache option should be part of configuration and not build command - i.e. xmake f -m "Game__Shipping__Win64" --ccache=y

Not sure if that's what you meant, let me know.

[bitonality]

Also dumb question,

Is ccache installed on the runner?

[Buckminsterfullerene02]

(tried adding --ccache=y to build target command, and adding build.cache policy in `xmake.lua).

the ccache option should be part of configuration and not build command - i.e. xmake f -m "Game__Shipping__Win64" --ccache=y

Not sure if that's what you meant, let me know.

Yeah, that's what I meant when I said "build target command".

[Buckminsterfullerene02]

Also dumb question,

Is ccache installed on the runner?

I just assumed it was part of xmake, so I don't know...

[Buckminsterfullerene02]

Turns out the build.cache policy really messes up proxy gen so I think it's better to just not touch that...

[bitonality]

Turns out the build.cache policy really messes up proxy gen so I think it's better to just not touch that...

I'm open to investigating that once we've made some more headway in linux-land. This first pass dependency cache is already a big step in the right direction.