#!/bin/bash
# set -x

# A HEREDOC to output a uname bash script to network with a chroot with return
# values based on the devuan arm-sdk environment at buildtime not the system
# running the chroot.
#
# 
# --------------------------------
## Test variables
# kernel_version="6.3.2-1"
# kernel_version_string="#1 SMP PREEMPT_DYNAMIC Debian ${kernel_version}-${kernel_version_build} ($(date +%F))"
# uname_ostype="Linux"
# uname_os="GNU/${uname_ostype}"
# hostname="rockpro64"
# build_string="g8cce48cacf88"
# arch="amd64"
# target_arch="aarch64"

# strapdir="/space/code_repositories/decode-os/os-build-system/arm-sdk/tmp/devuan-arm64-build/bootstrap"
#-------
install_custom_uname() {
	fn install_custom_uname "(override)"
	req=(strapdir kernel_version kernel_version_string uname_ostype uname_os hostname build_string arch target_arch)
	ckreq || return 1

	# cat <<-EOF | sudo tee "$strapdir/usr/local/bin/uname" >/dev/null
	cat <<-EOF | sudo tee "$strapdir/usr/local/bin/uname" >/dev/null
		#! /bin/sh
		set -e

		datarootdir="/usr/share"
		datadir="\${datarootdir}"
		if [ "x\$pkgdatadir" = x ]; then
			pkgdatadir="\${datadir}/grub"
		fi
		# export it for scripts
		export pkgdatadir
		. "\${pkgdatadir}/grub-mkconfig_lib"
		self=\$(basename \$0)

		# Print the usage.
		usage () {
			gettext_printf "Usage: uname [OPTION]\n" "\$self"
			gettext "Print certain system information.  With no OPTION, same as -s."; echo
			gettext "WARNING: this is a dummy uname with hardcoded values for use in a chroot"; echo
			gettext "used by devuan arm-sdk."; echo
			echo
			print_option_help "-a, --all=\$(gettext FILE)"                "\$(gettext "print all information, in the following order,")"
			print_option_help				                     "\$(gettext "  except omit -p and -i if unknown:")"
			print_option_help "-s, --kernel-name=\$(gettext FILE)"        "\$(gettext "print the kernel name")"
			print_option_help "-n, --nodename=\$(gettext FILE)"           "\$(gettext "print the network node hostname")"
			print_option_help "-r, --kernel-release=\$(gettext FILE)"     "\$(gettext "print the kernel release")"
			print_option_help "-v, --kernel-version=\$(gettext FILE)"     "\$(gettext "print the kernel version")"
			print_option_help "-m, --machine=\$(gettext FILE)"            "\$(gettext "print the machine hardware name")"
			print_option_help "-p, --processor=\$(gettext FILE)"          "\$(gettext "print the processor type \(non-portable\)")"
			print_option_help "-i, --hardware-platform=\$(gettext FILE)"  "\$(gettext "print the hardware platform \(non-portable\) bsd/sunos")"
			print_option_help "-o, --operating-system=\$(gettext FILE)"   "\$(gettext "print the operating system")"
			print_option_help "-h, --help" "\$(gettext "print this message and exit")"
			echo
		}


		# Check the arguments.
		while test \$# -gt 0
		do
		option=\$1
		shift
		case "\${option}" in
			-h | --help)
				usage
				exit 0 ;;
			-a | --all)
				echo "${uname_ostype}  ${hostname} ${kernel_version}-${build_string} ${kernel_version_string} ${target_arch}"
				exit 0 ;;
			-s | --kernel-name)
				echo "${uname_ostype}"                                      # \${uname_ostype} "Linux"
				exit 0 ;;
			-n | --nodename)
				echo "${hostname}"                                  # \${hostname} "rockpro64"
				exit 0 ;;
			-r | --kernel-release)
				echo "${kernel_version}-${build_string}"                      # \${kernel_version}-\${build_string} "4.18.8-77394-g8cce48cacf88"
				exit 0 ;;
			-v | --kernel-version)
				echo "${kernel_version_string}"    # \${kernel_version_version_string} "#1 SMP PREEMPT_DYNAMIC Debian 6.1.8-1 (2023-01-29)"
				exit 0 ;;
			-m | --machine)
				echo "${arch}"                                      # \${arch] "x86_64" || "arm64"
				exit 0 ;;
			-p | --processor)
				echo "${target_arch}"                                    # \${target_arch} aarch64 non-portable
				exit 0 ;;
			-i | --hardware-platform)
				echo "${arch}"                                      # \${arch} x86_64 arm64
				exit 0 ;;
			-o | --operating-system)
				echo "${uname_os}"                                  # \${uname_os} GNU/Linux
				exit 0 ;;
			-*)
				gettext_printf "Unrecognized option \'%s'\n" "\$option" 1>&2
				usage
				exit 1 ;;
				# Explicitly ignore non-option arguments, for compatibility.
		esac
		done
	EOF
	sudo chmod +x "$strapdir/usr/local/bin/uname"
}

remove_custom_uname() {
	fn install_custom_uname "(override)"
	req=(strapdir)
	ckreq || return 1

	rm "$strapdir/usr/local/bin/uname"
}

# install_custom_uname