ktprograms

How to use this

Steps before launching the VM

1. Open the VM Configuration
2. Go to the QEMU tab and scroll to the bottom.
3. Click on the text box with the grey text New...
4. Paste these two lines into it:

-chardev socket,port=4321,host=127.0.0.1,server,nowait,id=qga0
-device virtserialport,chardev=qga0,name=org.qemu.guest_agent.0

ktprograms

Steps to GHC + Shellcheck on Alpine Arm64

This is everything I had to do in order to get a working GHC running on Alpine aarch64, which I could then use to bootstrap cabal-install and compile shellcheck. I will be compiling GHC 8.10.7 because (a) cabal-install doesn't support GHC 9.x, and (b) there seems to be a linker bug on GHC 9.x.

Note: I am using doas in these instructions (except when in the chroot), but feel free to replace it with sudo

Here's a brief overview of the steps needed:

• Compile a cross-compiling toolchain targeting Alpine
• Create a Debian chroot and install dependencies (including the cross-compiling toolchain)

ktprograms

#!/sbin/openrc-run

i386_magic="\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00"
i386_mask="\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"

x86_64_magic="\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x3e\x00"
x86_64_mask="\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"

arm_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00'
arm_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'

ktprograms

import kotlin.math.pow

object Base85 {
    // Data class to represent the 5 output values of the base85 / ascii85 encoding
    private data class Block(val a: UInt, val b: UInt, val c: UInt, val d: UInt, val e: UInt)

    // Encode a ByteArray to a Base85 / Ascii85 String
    fun encode(arr: ByteArray): String {
        var final = ""
        for (x in arr.indices step 4) {