Github Action caching/optimizations.

[FluffyOMC]

I have it where QT auto caches, Vulkan SDK caches as we have it on a hardset version, and VCPKG keeps a cache until any dependency files are changed. If they're changed, VCPKG runs again and caches the new dependencies. Either way... Any other things we can cache for faster action times? I was not able to have Vulkan cache for linux as it's an Apt install.

Action times: These are builds re-executed to test with cache.

BUILD #    |             CACHES            | Win (With Build) | Win (No Build) 
Build # 47 |              NONE             | 7m 11s           | 3m 09s
Build # 54 |         QT + Vulkan           | 6m 46s           | 2m 34s (-35s) 
Build # 58 |      QT + Vulkan + VCPKG      | 6m 11s           | 1m 57s (-37s)
Build # 60 |  QT + Vulkan + VCPKG + CMAKE  | 5m 03s           | 1m 11s (-46s)

[ultimaweapon]

That should be the best possible we can get.

[FluffyOMC]

Unless CMake can only recompile changed files (Because we can store the whole Cmake cache and still have the command run.), then I'd agree.

[FluffyOMC]

Caching uses a regular windows and linux folder path, so if there was something you wanted excluded from Build, we'd do...

Keep:
D:\a\Obliteration\Build\
Exclude:
!D:\a\Obliteration\Build\dontuse\

[ultimaweapon]

There are 2 folders related to this, build and src/target; both of them must be re-compile when the toolchains have been updated.

For Qt try to set Qt6_DIR environment variable to the full path where Qt is installed.

[FluffyOMC]

There are 2 folders related to this, build and src/target; both of them must be re-compile when the toolchains have been updated.

For Qt try to set Qt6_DIR environment variable to the full path where Qt is installed.

As you've been seeing, it checks its environment (runner OS) when making the Cache Key. So if the OS/Environment changes, so does the Key, which then invalidates the cache and makes it request a recache/rerun.

[FluffyOMC]

And, would I want this with both the Run Cmake step and Build step, or just the Build step?

[ultimaweapon]

I mean setting Qt6_DIR on your computer to fix CMake can't find Qt folder.

[FluffyOMC]

The cache can be up to 10GB. Anyways, any questions or suggestions?

[FluffyOMC]

@ultimaweapon Chart updated with Cmake cache added! More than a full minute decrease from the last build time!

[FluffyOMC]

New change. Note: Changing the workflow YMLs or Dependency files will invalidate the Cmake cache due to the build environment being changed.

[ultimaweapon]

It is also possible for GitHub to update pre-installed software on the runner and it is possible for the software to be a different version when we install via apt-get. Whenever this happen we must make sure the whole project get re-compiled, not using the cached data.