fix(-A): detect more compression formats

[190n]

109ce67 added support for uncompressed package tarballs, but the compression format was limited to xz or zstd. I added detection for all the compression formats mentioned in the default makepkg.conf:

COMPRESSGZ=(gzip -c -f -n)
COMPRESSBZ2=(bzip2 -c -f)
COMPRESSXZ=(xz -c -z -)
COMPRESSZST=(zstd -c -T0 -)
COMPRESSLRZ=(lrzip -q)
COMPRESSLZO=(lzop -q)
COMPRESSZ=(compress -c -f)
COMPRESSLZ4=(lz4 -q)
COMPRESSLZ=(lzip -c -f)

In particular this restores LZ4 support which broke for me when I recently upgraded to aura 4.0.

[fosskers]

Hi, thanks for this. I will do a full review in 5 days.

[fosskers]

This function is used in a number of places and in some cases may be called thousands of times. I'd like to avoid the allocation of an Iter and the O(n) lookup if possible, but for that we'd need a HashSet or something, yet can't allocate one statically.

Another approach would be to just have a large chain of || calls, with the most likely candidates first. Any thoughts?

[190n]

I checked on Godbolt and all the iterator stuff seems to be inlined. Here's the code generated with any() and here's the code with a || chain. The order is a little different but the basic operations are the same.

I can move .pkg.tar, .pkg.tar.zst, and .pkg.tar.xz to the top, though. That does affect the order in which comparisons are made in the assembly so it'll be a bit faster to return early on those cases.

[fosskers]

I took care of it. Thanks again for this.