feat(node/os): implement os.machine()

[sno2]

Ref: https://nodejs.org/api/os.html#osmachine

Please wait on CI/CD, not sure about Darwin stuff and I don't have a mac to test it on.

[sno2]

Someone responded to my question related to finding the machine on darwin (kernel in the Zig discord):

Ah, I think that’s just the “hw.cputype” property on OSX’s sysctl
I have it somewhere in my Analyzer KEXT
I imagine you’re doing this from within Zig via the C headers

yeah it's hw.cputype; you're going to probably have to make use of the machine.h header:

#define CPU_ARCH_MASK           0xff000000      /* mask for architecture bits */
#define CPU_ARCH_ABI64          0x01000000      /* 64 bit ABI */
#define CPU_ARCH_ABI64_32       0x02000000      /* ABI for 64-bit hardware with 32-bit types; LP32 */

#define CPU_TYPE_X86            ((cpu_type_t) 7)
#define CPU_TYPE_ARM            ((cpu_type_t) 12)
#define CPU_TYPE_ARM64          (CPU_TYPE_ARM | CPU_ARCH_ABI64)
#define CPU_TYPE_ARM64_32       (CPU_TYPE_ARM | CPU_ARCH_ABI64_32)

then the final type should be something like:

cpu_type_t cputype_aligned = cputype & CPU_ARCH_MASK;

if (cputype_aligned == CPU_TYPE_X86)
   /* ... */
 

should also probably check if the system is 64-bit capable
via hw.cpu64bit_capable I think

Going to dissect this and hopefully use it to implement the behavior in this PR when I find some time.

[Jarred-Sumner]

if all we want is CPU_ARCH

bun is statically compiled

we can just use

if (Environment.isAARCH64)
    return "aarch64";
else if (Environment.isX64) 
   return "x64";

etc

[sno2]

Hmm yeah, not sure about all those other options, though. I guess we would have to ship specific executables to run on those archs so it's fine to just include aarch/x86_64 at comptime.

[sno2]

Alright, I renamed the option to arm64 as per the uname Wikipedia page: aarch64 is only possible on a Raspberry PI which I don't suppose we will support anytime soon.

[jwhear]

Fixes #1981

[jwhear]

@sno2 Thank you for this PR and sorry about the delay. I am interested in getting this merged up once we get builds passing.