Samples build.zig cannot be directly used

[Pyrolistical]

If you try to build a sample directly, it errors:

$ cd samples\minimal_d3d12
$ zig build
...\samples\minimal_d3d12\build.zig:4:25: error: import of file outside module path: '../../build.zig'
const Options = @import("../../build.zig").Options;
                        ^~~~~~~~~~~~~~~~~

I think we can refactor to directly pass in target and optimize but duplicate all other options as b.option.

[hazeycode]

Yes the build.zigs for samples were not intended to be run using zig build.

Is there any benefit to doing this over just running a particular sample build command from the top level?

[Pyrolistical]

Oh I found another way to break the Options dep with an anytype:
https://github.com/Pyrolistical/zig-gamedev/pull/2/files

[hazeycode]

Oh I found another way to break the Options dep with an anytype: https://github.com/Pyrolistical/zig-gamedev/pull/2/files

I think we should make this change. Sample apps only consume a self-defined subset of options; and anytype is great for implicit interfaces.

[Pyrolistical]

I think this is blocked by samples/common.

For example samples/audio_experiments:

1. Top-level build: sample uses @import("../common/build.zig"). This is allowed since both samples/audio_experiments and samples/common are children of cwd
2. Direct sample build: Can't use @import("../common/build.zig") since cwd is samples/audio_experiments and ../common is not a child of cwd. This could be solved by adding common to build.zig.zon and @import("common"), but then we have @import("common") and @import("../common/build.zig") in the same file and zig doesn't like that. It sees it as a double import. Note that each @import would be inside fns, but zig still processes it even if the fn is unused.