Deno installation script

deno_install.sh

#!/bin/sh
# A modification of the standard Deno installation script (https://deno.land/install.sh)
# updated to support downloading a Linux arm64 binary from LukeChannings/deno-arm64
# MIT licence. 

set -e

if ! command -v unzip >/dev/null; then
	echo "Error: unzip is required to install Deno (see: https://github.com/denoland/deno_install#unzip-is-required)." 1>&2
	exit 1
fi

repo="denoland/deno"

if [ "$OS" = "Windows_NT" ]; then
	target="x86_64-pc-windows-msvc"
else
	case $(uname -sm) in
	"Darwin x86_64") target="x86_64-apple-darwin" ;;
	"Darwin arm64") target="aarch64-apple-darwin" ;;
	"Linux aarch64")
		repo="LukeChannings/deno-arm64"
		target="linux-arm64"
		;;
	"Linux armhf")
		echo "32-bit ARM is not supported. Please check your hardware and install a 64-bit operating system."
		exit 1
		;;
	*) target="x86_64-unknown-linux-gnu" ;;
	esac
fi

if [ $# -eq 0 ]; then
	deno_uri="https://github.com/${repo}/releases/latest/download/deno-${target}.zip"
else
	deno_uri="https://github.com/${repo}/releases/download/${1}/deno-${target}.zip"
fi

deno_install="${DENO_INSTALL:-$HOME/.deno}"
bin_dir="$deno_install/bin"
exe="$bin_dir/deno"

if [ ! -d "$bin_dir" ]; then
	mkdir -p "$bin_dir"
fi

curl --fail --location --progress-bar --output "$exe.zip" "$deno_uri"
unzip -d "$bin_dir" -o "$exe.zip"
chmod +x "$exe"
rm "$exe.zip"

echo "Deno was installed successfully to $exe"
if command -v deno >/dev/null; then
	echo "Run 'deno --help' to get started"
else
	case $SHELL in
	/bin/zsh) shell_profile=".zshrc" ;;
	*) shell_profile=".bashrc" ;;
	esac
	echo "Manually add the directory to your \$HOME/$shell_profile (or similar)"
	echo "  export DENO_INSTALL=\"$deno_install\""
	echo "  export PATH=\"\$DENO_INSTALL/bin:\$PATH\""
	echo "Run '$exe --help' to get started"
fi