installers/pc: New installer for PC platforms

1 files changed, 118 insertions, 0 deletions

diff --git a/installers/pc.sh b/installers/pc.sh
new file mode 100644
index 0000000..aa61b35
--- /dev/null
+++ b/installers/pc.sh
@@ -0,0 +1,118 @@
+#!/bin/sh
+
+set -u
+
+# This should be maintained in order of compatibility, i.e. each arch can also
+# run programs built for the arches before it.
+ARCHES='i686 amd64'
+
+main()
+{
+	local opt=
+	local host_arch=
+	local host_plat=
+	local mirror=
+	local install_arch=
+
+	while getopts 'a:P:m:' opt; do
+		case ${opt} in
+			a) host_arch="${OPTARG}";;
+			P) host_plat="${OPTARG}";;
+			m) mirror="${OPTARG}";;
+			?)
+				print_usage >&2
+				exit 1
+				;;
+		esac
+	done
+	shift $(($OPTIND - 1))
+	if [ ${#} -ne 1 ]; then
+		print_usage >&2
+		exit 1
+	fi
+	root="${1}"
+
+	install_arch="$(detect_arch)"
+	if [ "x${host_arch}" = 'x' ]; then
+		host_arch="${install_arch}"
+	else
+		validate_arch "${host_arch}"
+	fi
+	check_arch_compat "${install_arch}" "${host_arch}"
+
+	if [ "x${host_plat}" = 'x' ]; then
+		host_plat='dev'
+	fi
+
+	"${0%installers/inst-pc.sh}./miniprokit.sh" install \
+		-a "${host_arch}" -P "${host_plat}" \
+		${mirror:+-m} ${mirror} "${root}"
+	"${0%installers/inst-pc.sh}./miniprokit.sh" shell "${root}" \
+		<"${0%inst-pc.sh}data/pc.sh"
+}
+
+print_usage()
+{
+	printf 'Usage: %s [-a <arch>] [-P <plat>] [-m <mirror>] <root>\n' "${0}"
+}
+
+error()
+{
+	local status=${1}
+	local fmt="${2}"
+	shift 2
+
+	printf "Error: ${fmt}\n" "${@}" >&2
+
+	exit ${status}
+}
+
+detect_arch()
+{
+	local uname_m=
+	local uname_s=
+	local arch=
+
+	uname_m="$( (uname -m) 2>/dev/null)" || uname_m='?'
+	uname_s="$( (uname -s) 2>/dev/null)" || uname_s='?'
+	case "${uname_m}:${uname_s}" in
+		'i686:Linux') arch='i686-linux-glibc';;
+		'x86_64:Linux') arch='amd64-linux-glibc';;
+		'?:?') error 2 'Architecture unknown';;
+		*) error 2 'Architecture unsupported';;
+	esac
+
+	printf '%s\n' "${arch}"
+}
+
+validate_arch()
+{
+	local arch="${1}"
+	local arches=
+
+	arches=" ${ARCHES} "
+	if [ "x${arches#* ${arch} }" = "x${arches}" ]; then
+		error 2 'Unknown architecture "%s"' "${arch}"
+	fi
+}
+
+check_arch_compat()
+{
+	local install_arch="${1}"
+	local host_arch="${2}"
+	local arches=
+
+	if [ "x${install_arch}" = "x${host_arch}" ]; then
+		return 0
+	fi
+
+	arches="$(printf ' %s ' ${ARCHES})"
+	if [ "x${arches#* ${host_arch} * ${install_arch} }" = "x${arches}" ]
+	then
+		error 2 'Cannot install a system of architecture %s on %s %s' \
+			"${host_arch}" 'a system of architecture' \
+			"${install_arch}"
+	fi
+}
+
+main "${@}"