refactor(pkgs): Remove obsolete code and streamline the implementation'

[PetarKirov]

• config(git): Ignore ci-matrix artifacts
• refactor(pkgs/*/): Delete obsolete files

[dukc]

ping @PetarKirov what's the status on this?

[github-actions[bot]]

Thanks for your Pull Request!

Below you will find a summary of the cachix status of each package, for each supported platform.

package	x86_64-linux	x86_64-darwin	aarch64-darwin
dmd	✅ cached	✅ cached	🚫 not supported
dmd-2_092_1	✅ cached	✅ cached	🚫 not supported
dmd-2_096_1	✅ cached	✅ cached	🚫 not supported
dmd-2_098_1	✅ cached	✅ cached	🚫 not supported
dmd-2_100_2	✅ cached	✅ cached	🚫 not supported
dmd-2_102_2	✅ cached	✅ cached	🚫 not supported
dmd-2_103_1	✅ cached	✅ cached	🚫 not supported
dmd-2_104_2	✅ cached	✅ cached	🚫 not supported
dmd-2_105_2	✅ cached	✅ cached	🚫 not supported
dmd-binary-2_079_1	✅ cached	✅ cached	🚫 not supported
dmd-binary-2_080_1	✅ cached	✅ cached	🚫 not supported
dmd-binary-2_081_2	✅ cached	✅ cached	🚫 not supported
dmd-binary-2_082_1	✅ cached	✅ cached	🚫 not supported
dmd-binary-2_083_1	✅ cached	✅ cached	🚫 not supported
dmd-binary-2_084_1	✅ cached	✅ cached	🚫 not supported
dmd-binary-2_085_1	✅ cached	✅ cached	🚫 not supported
dmd-binary-2_086_1	✅ cached	✅ cached	🚫 not supported
dmd-binary-2_087_1	✅ cached	✅ cached	🚫 not supported
dmd-binary-2_088_1	✅ cached	✅ cached	🚫 not supported
dmd-binary-2_089_1	✅ cached	✅ cached	🚫 not supported
dmd-binary-2_090_1	✅ cached	✅ cached	🚫 not supported
dmd-binary-2_098_0	✅ cached	✅ cached	🚫 not supported
dmd-bootstrap	✅ cached	✅ cached	🚫 not supported
dub	✅ cached	✅ cached	✅ cached
dub-1_30_0	✅ cached	✅ cached	✅ cached
ldc	✅ cached	🚧 known to fail (disabled)	🚧 known to fail (disabled)
ldc-1_30_0	✅ cached	🚧 known to fail (disabled)	🚧 known to fail (disabled)
ldc-binary-1_19_0	✅ cached	✅ cached	🚫 not supported
ldc-binary-1_25_0	✅ cached	✅ cached	✅ cached
ldc-binary-1_28_0	✅ cached	✅ cached	✅ cached
ldc-binary-1_32_1	✅ cached	✅ cached	✅ cached
ldc-binary-1_34_0	✅ cached	✅ cached	✅ cached
ldc-bootstrap	✅ cached	✅ cached	✅ cached

[PetarKirov]

ping @PetarKirov what's the status on this?

@dukc

It turns out that using a newer version of LDC to compile older versions of DMD is way harder than I imagined. There were some things that are expected, like older DMD versions using deprecated features (classes + alias this, warnings for unreachable code or delegates returning static arrays in extern (C++): blocks), which I was able to fix by:

• Omitting -w and -de flags when compiling dmd packages older than 2.103.0.
• Including a patch from this PR when building dmd versions older than 2.101.0.

With these changes, I was able to successfully build with LDC 1.34.0 binary the following versions:

• dmd-2_100_2
• dmd-2_102_2
• dmd-2_103_1
• dmd-2_104_2
• dmd-2_105_2

However dmd-2_092_1, dmd-2_096_1, dmd-2_098_1 fail to build with some extremely cryptic errors... dmd does compile, however druntime fails to build with errors like

src/core/time.d(1882): Error: incompatible types for array comparison: string and string

CI link.

In the end, I got tired of making LDC 1.34.0 work as bootstrap compiler and reverter to 1.25.0, which is what your PR used.

I also tried using other LDC version I got the following results:

• 1.25.0 :heavy_check_mark:
• 1.28.0 :heavy_check_mark:
• 1.32.1 :x:
• 1.34.0 :x:

[PetarKirov]

I'm going ahead with merging this PR as I'd also like to take care of #66 and #55. That said, I'd appreciate if you have time to review this PR after that - I'll try to address your comments in a future PR.