Zig install/upgrade script, latest from master

update-zig.sh

#!/bin/bash
# Updates zig to the latest master version using the official binary,
# no compilation required.
#
# - Edit the ARCHITECTURE string to match your system.
# - Requires jq. `brew install jq` (macOS) or get it at https://jqlang.github.io/jq/.
# - Put the script in the directory you want zig to be installed below, such as ~/zig/bin.
# - Then run: chmod +x update-zig.sh && ./update-zig.sh
# - Zig will live in a subfolder named zig-master-latest.
# - Add that dir to your path, for example:
#   zsh:
#   path+=('/Users/youruser/zig/bin/zig-master-latest')
#
#   fish:
#   fish_add_path /Users/youruser/zig/bin/zig-master-latest
# - Run ./update-zig.sh whenever you want to grab the latest master version.

# Change this to match your architecture and OS:
# - x86_64-macos
# - aarch64-macos
# - x86_64-linux
# - aarch64-linux
# - riscv64-linux
# - powerpc64le-linux
# - powerpc-linux
# - x86-linux
# - x86_64-windows
# - aarch64-windows
# - x86-windows
ARCHITECTURE="x86_64-macos"

json=$(curl -s https://ziglang.org/download/index.json)

url=$(echo "$json" | jq -r ".master.\"$ARCHITECTURE\".tarball")
expected_sha=$(echo "$json" | jq -r ".master.\"$ARCHITECTURE\".shasum")

curl -O "$url"

actual_sha=$(shasum -a 256 zig*.tar.xz | awk '{print $1}')
if [ "$expected_sha" != "$actual_sha" ]; then
  echo "SHA checksum verification failed."
  echo "Expected: $expected_sha"
  echo "Actual: $actual_sha"
  exit 1
fi

if [ ! -d "zig-master-latest" ]; then
  mkdir zig-master-latest
fi

tar -xf zig*.tar.xz -C zig-master-latest --strip-components=1
rm zig*.tar.xz