[jackhill/guix/guix.git] / etc / guix-install.sh

#!/bin/sh
# GNU Guix --- Functional package management for GNU
# Copyright © 2017 sharlatan <sharlatanus@gmail.com>
# Copyright © 2018 Ricardo Wurmus <rekado@elephly.net>
# Copyright © 2018 Efraim Flashner <efraim@flashner.co.il>
#
# This file is part of GNU Guix.
#
# GNU Guix is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or (at
# your option) any later version.
#
# GNU Guix is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

# We require Bash but for portability we'd rather not use /bin/bash or
# /usr/bin/env in the shebang, hence this hack.
if [ "x$BASH_VERSION" = "x" ]
then
    exec bash "$0" "$@"
fi

set -e

[ "$UID" -eq 0 ] || { echo "This script must be run as root."; exit 1; }

REQUIRE=(
    "dirname"
    "readlink"
    "wget"
    "gpg"
    "grep"
    "which"
    "sed"
    "sort"
    "getent"
    "mktemp"
    "rm"
    "chmod"
    "uname"
    "groupadd"
    "tail"
    "tr"
)

PAS=$'[ \033[32;1mPASS\033[0m ] '
ERR=$'[ \033[31;1mFAIL\033[0m ] '
INF="[ INFO ] "

DEBUG=0
GNU_URL="https://ftp.gnu.org/gnu/guix/"
OPENPGP_SIGNING_KEY_ID="3CE464558A84FDC69DB40CFB090B11993D9AEBB5"

# This script needs to know where root's home directory is.  However, we
# cannot simply use the HOME environment variable, since there is no guarantee
# that it points to root's home directory.
ROOT_HOME="$(echo ~root)"

# ------------------------------------------------------------------------------
#+UTILITIES

_err()
{ # All errors go to stderr.
    printf "[%s]: %s\n" "$(date +%s.%3N)" "$1"
}

_msg()
{ # Default message to stdout.
    printf "[%s]: %s\n" "$(date +%s.%3N)" "$1"
}

_debug()
{
    if [ "${DEBUG}" = '1' ]; then
        printf "[%s]: %s\n" "$(date +%s.%3N)" "$1"
    fi
}


chk_require()
{ # Check that every required command is available.
    declare -a cmds
    declare -a warn

    cmds=(${1})

    _debug "--- [ $FUNCNAME ] ---"

    for c in ${cmds[@]}; do
        command -v "$c" &>/dev/null || warn+=("$c")
    done

    [ "${#warn}" -ne 0 ] &&
        { _err "${ERR}Missing commands: ${warn[*]}.";
          return 1; }
    
    _msg "${PAS}verification of required commands completed"

    gpg --list-keys ${OPENPGP_SIGNING_KEY_ID} >/dev/null 2>&1 || (
        _err "${ERR}Missing OpenPGP public key.  Fetch it with this command:"
        echo "  gpg --keyserver pool.sks-keyservers.net --recv-keys ${OPENPGP_SIGNING_KEY_ID}"
        exit 1
    )
}

chk_term()
{ # Check for ANSI terminal for color printing.
    local ansi_term

    if [ -t 2 ]; then
        if [ "${TERM+set}" = 'set' ]; then
            case "$TERM" in
                xterm*|rxvt*|urxvt*|linux*|vt*|eterm*|screen*)
                    ansi_term=true
                    ;;
                *)
                    ansi_term=false
                    ERR="[ FAIL ] "
                    PAS="[ PASS ] "
                    ;;
            esac
        fi
    fi
}

chk_init_sys()
{ # Return init system type name.
    if [[ $(/sbin/init --version 2>/dev/null) =~ upstart ]]; then
        _msg "${INF}init system is: upstart"
        INIT_SYS="upstart"
        return 0
    elif [[ $(systemctl) =~ -\.mount ]]; then
        _msg "${INF}init system is: systemd"
        INIT_SYS="systemd"
        return 0
    elif [[ -f /etc/init.d/cron && ! -h /etc/init.d/cron ]]; then
        _msg "${INF}init system is: sysv-init"
        INIT_SYS="sysv-init"
        return 0
    else
        INIT_SYS="NA"
        _err "${ERR}Init system could not be detected."
    fi
}

chk_sys_arch()
{ # Check for operating system and architecture type.
    local os
    local arch

    os="$(uname -s)"
    arch="$(uname -m)"

    case "$arch" in
        i386 | i486 | i686 | i786 | x86)
            local arch=i686
            ;;
        x86_64 | x86-64 | x64 | amd64)
            local arch=x86_64
            ;;
        aarch64)
            local arch=aarch64
            ;;
	armv7l)
	    local arch=armhf
	    ;;
        *)
            _err "${ERR}Unsupported CPU type: ${arch}"
            exit 1
    esac

    case "$os" in
        Linux | linux)
            local os=linux
            ;;
        *)
            _err "${ERR}Your operation system (${os}) is not supported."
            exit 1
    esac

    ARCH_OS="${arch}-${os}"
}

# ------------------------------------------------------------------------------
#+MAIN

guix_get_bin_list()
{ # Scan GNU archive and save list of binaries
    local gnu_url="$1"
    local -a bin_ver_ls
    local latest_ver
    local default_ver

    _debug "--- [ $FUNCNAME ] ---"

    # Filter only version and architecture
    bin_ver_ls=("$(wget -qO- "$gnu_url" \
        | sed -n -e 's/.*guix-binary-\([0-9.]*\)\..*.tar.xz.*/\1/p' \
        | sort -Vu)")

    latest_ver="$(echo "$bin_ver_ls" \
                       | grep -oP "([0-9]{1,2}\.){2}[0-9]{1,2}" \
                       | tail -n1)"

    default_ver="guix-binary-${latest_ver}.${ARCH_OS}"

    if [[ "${#bin_ver_ls}" -ne "0" ]]; then
        _msg "${PAS}Release for your system: ${default_ver}"
    else
        _err "${ERR}Could not obtain list of Guix releases."
        exit 1
    fi

    # Use default to download according to the list and local ARCH_OS.
    BIN_VER="$default_ver"
}

guix_get_bin()
{ # Download and verify binary package.
    local url="$1"
    local bin_ver="$2"
    local dl_path="$3"

    _debug "--- [ $FUNCNAME ] ---"

    _msg "${INF}Downloading Guix release archive"

    wget --help | grep -q '\--show-progress' && \
        _PROGRESS_OPT="-q --show-progress" || _PROGRESS_OPT=""
    wget $_PROGRESS_OPT -P "$dl_path" "${url}/${bin_ver}.tar.xz" "${url}/${bin_ver}.tar.xz.sig"

    if [[ "$?" -eq 0 ]]; then
       _msg "${PAS}download completed."
    else
        _err "${ERR}could not download ${url}/${bin_ver}.tar.xz."
        exit 1
    fi

    pushd $dl_path >/dev/null
    gpg --verify "${bin_ver}.tar.xz.sig" >/dev/null 2>&1
    if [[ "$?" -eq 0 ]]; then
        _msg "${PAS}Signature is valid."
        popd >/dev/null
    else
        _err "${ERR}could not verify the signature."
        exit 1
    fi
}

sys_create_store()
{ # Unpack and install /gnu/store and /var/guix
    local pkg="$1"
    local tmp_path="$2"

    _debug "--- [ $FUNCNAME ] ---"

    cd "$tmp_path"
    tar --warning=no-timestamp \
        --extract \
        --file "$pkg" &&
    _msg "${PAS}unpacked archive"

    if [[ -e "/var/guix" || -e "/gnu" ]]; then
        _err "${ERR}A previous Guix installation was found.  Refusing to overwrite."
        exit 1
    else
        _msg "${INF}Installing /var/guix and /gnu..."
        mv "${tmp_path}/var/guix" /var/
        mv "${tmp_path}/gnu" /
    fi

    _msg "${INF}Linking the root user's profile"
    mkdir -p "${ROOT_HOME}/.config/guix"
    ln -sf /var/guix/profiles/per-user/root/current-guix \
       "${ROOT_HOME}/.config/guix/current"

    GUIX_PROFILE="${ROOT_HOME}/.config/guix/current"
    source "${GUIX_PROFILE}/etc/profile"
    _msg "${PAS}activated root profile at ${ROOT_HOME}/.config/guix/current"
}

sys_create_build_user()
{ # Create the group and user accounts for build users.

    _debug "--- [ $FUNCNAME ] ---"

    if [ $(getent group guixbuild) ]; then
        _msg "${INF}group guixbuild exists"
    else
        groupadd --system guixbuild
        _msg "${PAS}group <guixbuild> created"
    fi

    for i in $(seq -w 1 10); do
        if id "guixbuilder${i}" &>/dev/null; then
            _msg "${INF}user is already in the system, reset"
            usermod -g guixbuild -G guixbuild           \
                    -d /var/empty -s "$(which nologin)" \
                    -c "Guix build user $i"             \
                    "guixbuilder${i}";
        else
            useradd -g guixbuild -G guixbuild           \
                    -d /var/empty -s "$(which nologin)" \
                    -c "Guix build user $i" --system    \
                    "guixbuilder${i}";
            _msg "${PAS}user added <guixbuilder${i}>"
        fi
    done
}

sys_enable_guix_daemon()
{ # Run the daemon, and set it to automatically start on boot.

    local info_path
    local local_bin
    local var_guix

    _debug "--- [ $FUNCNAME ] ---"

    info_path="/usr/local/share/info"
    local_bin="/usr/local/bin"
    var_guix="/var/guix/profiles/per-user/root/current-guix"

    case "$INIT_SYS" in
        upstart)
            { initctl reload-configuration;
              cp "${ROOT_HOME}/.config/guix/current/lib/upstart/system/guix-daemon.conf" \
                 /etc/init/ &&
                  start guix-daemon; } &&
                _msg "${PAS}enabled Guix daemon via upstart"
            ;;
        systemd)
            { cp "${ROOT_HOME}/.config/guix/current/lib/systemd/system/guix-daemon.service" \
                 /etc/systemd/system/;
              chmod 664 /etc/systemd/system/guix-daemon.service;
              systemctl daemon-reload &&
                  systemctl start guix-daemon &&
                  systemctl enable guix-daemon; } &&
                _msg "${PAS}enabled Guix daemon via systemd"
            ;;
        NA|*)
            _msg "${ERR}unsupported init system; run the daemon manually:"
            echo "  ${ROOT_HOME}/.config/guix/current/bin/guix-daemon --build-users-group=guixbuild"
            ;;
    esac

    _msg "${INF}making the guix command available to other users"

    [ -e "$local_bin" ] || mkdir -p "$local_bin"
    ln -sf "${var_guix}/bin/guix"  "$local_bin"

    [ -e "$info_path" ] || mkdir -p "$info_path"
    for i in ${var_guix}/share/info/*; do
        ln -sf "$i" "$info_path"
    done
}

sys_authorize_build_farms()
{ # authorize the public keys of the two build farms
    while true; do
        read -p "Permit downloading pre-built package binaries from the project's build farms? (yes/no) " yn
        case $yn in
            [Yy]*) guix archive --authorize < "${ROOT_HOME}/.config/guix/current/share/guix/hydra.gnu.org.pub" &&
                         _msg "${PAS}Authorized public key for hydra.gnu.org";
                   guix archive --authorize < "${ROOT_HOME}/.config/guix/current/share/guix/ci.guix.info.pub" &&
                       _msg "${PAS}Authorized public key for ci.guix.info";
                   break;;
            [Nn]*) _msg "${INF}Skipped authorizing build farm public keys"
                   break;;
            *) _msg "Please answer yes or no.";
        esac
    done
}

welcome()
{
    cat<<"EOF"
    ░░░                                     ░░░
    ░░▒▒░░░░░░░░░               ░░░░░░░░░▒▒░░
     ░░▒▒▒▒▒░░░░░░░           ░░░░░░░▒▒▒▒▒░
         ░▒▒▒░░▒▒▒▒▒         ░░░░░░░▒▒░
               ░▒▒▒▒░       ░░░░░░
                ▒▒▒▒▒      ░░░░░░
                 ▒▒▒▒▒     ░░░░░
                 ░▒▒▒▒▒   ░░░░░
                  ▒▒▒▒▒   ░░░░░
                   ▒▒▒▒▒ ░░░░░
                   ░▒▒▒▒▒░░░░░
                    ▒▒▒▒▒▒░░░
                     ▒▒▒▒▒▒░
     _____ _   _ _    _    _____       _
    / ____| \ | | |  | |  / ____|     (_)
   | |  __|  \| | |  | | | |  __ _   _ ___  __
   | | |_ | . ' | |  | | | | |_ | | | | \ \/ /
   | |__| | |\  | |__| | | |__| | |_| | |>  <
    \_____|_| \_|\____/   \_____|\__,_|_/_/\_\

This script installs GNU Guix on your system

https://www.gnu.org/software/guix/
EOF
    echo -n "Press return to continue..."
    read -r  ANSWER
}

main()
{
    local tmp_path
    welcome

    _msg "Starting installation ($(date))"

    chk_term
    chk_require "${REQUIRE[*]}"
    chk_init_sys
    chk_sys_arch

    _msg "${INF}system is ${ARCH_OS}"

    tmp_path="$(mktemp -t -d guix.XXX)"

    guix_get_bin_list "${GNU_URL}"
    guix_get_bin "${GNU_URL}" "${BIN_VER}" "$tmp_path"

    sys_create_store "${BIN_VER}.tar.xz" "${tmp_path}"
    sys_create_build_user
    sys_enable_guix_daemon
    sys_authorize_build_farms

    _msg "${INF}cleaning up ${tmp_path}"
    rm -r "${tmp_path}"

    _msg "${PAS}Guix has successfully been installed!"
    _msg "${INF}Run 'info guix' to read the manual."
 }

main "$@"
Commit	Line	Data
f5fdc54d	1	#!/bin/sh
6f4e8693 RW	2	# GNU Guix --- Functional package management for GNU
	3	# Copyright © 2017 sharlatan <sharlatanus@gmail.com>
	4	# Copyright © 2018 Ricardo Wurmus <rekado@elephly.net>
ea6b1bae	5	# Copyright © 2018 Efraim Flashner <efraim@flashner.co.il>
6f4e8693 RW	6	#
	7	# This file is part of GNU Guix.
	8	#
	9	# GNU Guix is free software; you can redistribute it and/or modify it
	10	# under the terms of the GNU General Public License as published by
	11	# the Free Software Foundation; either version 3 of the License, or (at
	12	# your option) any later version.
	13	#
	14	# GNU Guix is distributed in the hope that it will be useful, but
	15	# WITHOUT ANY WARRANTY; without even the implied warranty of
	16	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	# GNU General Public License for more details.
	18	#
	19	# You should have received a copy of the GNU General Public License
	20	# along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
	21
f5fdc54d LC	22	# We require Bash but for portability we'd rather not use /bin/bash or
	23	# /usr/bin/env in the shebang, hence this hack.
	24	if [ "x$BASH_VERSION" = "x" ]
	25	then
	26	exec bash "$0" "$@"
	27	fi
	28
6f4e8693 RW	29	set -e
	30
	31	[ "$UID" -eq 0 ] \|\| { echo "This script must be run as root."; exit 1; }
	32
	33	REQUIRE=(
	34	"dirname"
	35	"readlink"
	36	"wget"
	37	"gpg"
	38	"grep"
	39	"which"
	40	"sed"
	41	"sort"
	42	"getent"
	43	"mktemp"
	44	"rm"
	45	"chmod"
	46	"uname"
	47	"groupadd"
	48	"tail"
	49	"tr"
	50	)
	51
	52	PAS=$'[ \033[32;1mPASS\033[0m ] '
	53	ERR=$'[ \033[31;1mFAIL\033[0m ] '
	54	INF="[ INFO ] "
	55
	56	DEBUG=0
3a3e9f2b	57	GNU_URL="https://ftp.gnu.org/gnu/guix/"
6f4e8693 RW	58	OPENPGP_SIGNING_KEY_ID="3CE464558A84FDC69DB40CFB090B11993D9AEBB5"
6f4e8693 RW	59
3cd4447f CM	60	# This script needs to know where root's home directory is. However, we
	61	# cannot simply use the HOME environment variable, since there is no guarantee
	62	# that it points to root's home directory.
	63	ROOT_HOME="$(echo ~root)"
	64
6f4e8693 RW	65	# ------------------------------------------------------------------------------
	66	#+UTILITIES
	67
	68	_err()
	69	{ # All errors go to stderr.
	70	printf "[%s]: %s\n" "$(date +%s.%3N)" "$1"
	71	}
	72
	73	_msg()
	74	{ # Default message to stdout.
	75	printf "[%s]: %s\n" "$(date +%s.%3N)" "$1"
	76	}
	77
	78	_debug()
	79	{
	80	if [ "${DEBUG}" = '1' ]; then
	81	printf "[%s]: %s\n" "$(date +%s.%3N)" "$1"
	82	fi
	83	}
	84
	85
	86	chk_require()
	87	{ # Check that every required command is available.
	88	declare -a cmds
	89	declare -a warn
	90
	91	cmds=(${1})
	92
	93	_debug "--- [ $FUNCNAME ] ---"
	94
	95	for c in ${cmds[@]}; do
593fe736	96	command -v "$c" &>/dev/null \|\| warn+=("$c")
6f4e8693 RW	97	done
	98
	99	[ "${#warn}" -ne 0 ] &&
	100	{ _err "${ERR}Missing commands: ${warn[*]}.";
	101	return 1; }
	102
	103	_msg "${PAS}verification of required commands completed"
	104
	105	gpg --list-keys ${OPENPGP_SIGNING_KEY_ID} >/dev/null 2>&1 \|\| (
	106	_err "${ERR}Missing OpenPGP public key. Fetch it with this command:"
1fc90e89	107	echo " gpg --keyserver pool.sks-keyservers.net --recv-keys ${OPENPGP_SIGNING_KEY_ID}"
6f4e8693 RW	108	exit 1
	109	)
	110	}
	111
	112	chk_term()
	113	{ # Check for ANSI terminal for color printing.
	114	local ansi_term
	115
	116	if [ -t 2 ]; then
	117	if [ "${TERM+set}" = 'set' ]; then
	118	case "$TERM" in
	119	xterm\|rxvt\|urxvt\|linux\|vt\|eterm\|screen*)
	120	ansi_term=true
	121	;;
	122	*)
	123	ansi_term=false
	124	ERR="[ FAIL ] "
	125	PAS="[ PASS ] "
	126	;;
	127	esac
	128	fi
	129	fi
	130	}
	131
	132	chk_init_sys()
	133	{ # Return init system type name.
	134	if [[ $(/sbin/init --version 2>/dev/null) =~ upstart ]]; then
	135	_msg "${INF}init system is: upstart"
	136	INIT_SYS="upstart"
	137	return 0
	138	elif [[ $(systemctl) =~ -\.mount ]]; then
	139	_msg "${INF}init system is: systemd"
	140	INIT_SYS="systemd"
	141	return 0
	142	elif [[ -f /etc/init.d/cron && ! -h /etc/init.d/cron ]]; then
	143	_msg "${INF}init system is: sysv-init"
	144	INIT_SYS="sysv-init"
	145	return 0
	146	else
	147	INIT_SYS="NA"
	148	_err "${ERR}Init system could not be detected."
	149	fi
	150	}
	151
	152	chk_sys_arch()
	153	{ # Check for operating system and architecture type.
	154	local os
	155	local arch
	156
	157	os="$(uname -s)"
	158	arch="$(uname -m)"
	159
	160	case "$arch" in
	161	i386 \| i486 \| i686 \| i786 \| x86)
	162	local arch=i686
	163	;;
	164	x86_64 \| x86-64 \| x64 \| amd64)
	165	local arch=x86_64
	166	;;
ea6b1bae EF	167	aarch64)
	168	local arch=aarch64
	169	;;
2510bd87 LC	170	armv7l)
	171	local arch=armhf
	172	;;
6f4e8693 RW	173	*)
	174	_err "${ERR}Unsupported CPU type: ${arch}"
	175	exit 1
	176	esac
	177
	178	case "$os" in
	179	Linux \| linux)
	180	local os=linux
	181	;;
	182	*)
	183	_err "${ERR}Your operation system (${os}) is not supported."
	184	exit 1
	185	esac
	186
	187	ARCH_OS="${arch}-${os}"
	188	}
	189
	190	# ------------------------------------------------------------------------------
	191	#+MAIN
	192
	193	guix_get_bin_list()
	194	{ # Scan GNU archive and save list of binaries
	195	local gnu_url="$1"
	196	local -a bin_ver_ls
	197	local latest_ver
	198	local default_ver
	199
	200	_debug "--- [ $FUNCNAME ] ---"
	201
	202	# Filter only version and architecture
	203	bin_ver_ls=("$(wget -qO- "$gnu_url" \
	204	\| sed -n -e 's/.guix-binary-\([0-9.]\)\...tar.xz./\1/p' \
	205	\| sort -Vu)")
	206
	207	latest_ver="$(echo "$bin_ver_ls" \
	208	\| grep -oP "([0-9]{1,2}\.){2}[0-9]{1,2}" \
	209	\| tail -n1)"
	210
	211	default_ver="guix-binary-${latest_ver}.${ARCH_OS}"
	212
	213	if [[ "${#bin_ver_ls}" -ne "0" ]]; then
	214	_msg "${PAS}Release for your system: ${default_ver}"
	215	else
	216	_err "${ERR}Could not obtain list of Guix releases."
	217	exit 1
	218	fi
	219
	220	# Use default to download according to the list and local ARCH_OS.
	221	BIN_VER="$default_ver"
	222	}
	223
	224	guix_get_bin()
	225	{ # Download and verify binary package.
	226	local url="$1"
	227	local bin_ver="$2"
	228	local dl_path="$3"
	229
	230	_debug "--- [ $FUNCNAME ] ---"
	231
	232	_msg "${INF}Downloading Guix release archive"
	233
	234	wget --help \| grep -q '\--show-progress' && \
	235	_PROGRESS_OPT="-q --show-progress" \|\| _PROGRESS_OPT=""
	236	wget $_PROGRESS_OPT -P "$dl_path" "${url}/${bin_ver}.tar.xz" "${url}/${bin_ver}.tar.xz.sig"
237
238	if [[ "$?" -eq 0 ]]; then
239	_msg "${PAS}download completed."
240	else
241	_err "${ERR}could not download ${url}/${bin_ver}.tar.xz."
242	exit 1
243	fi
244
245	pushd $dl_path >/dev/null
246	gpg --verify "${bin_ver}.tar.xz.sig" >/dev/null 2>&1
247	if [[ "$?" -eq 0 ]]; then
248	_msg "${PAS}Signature is valid."
249	popd >/dev/null
250	else
251	_err "${ERR}could not verify the signature."
252	exit 1
253	fi
254	}
255
256	sys_create_store()
257	{ # Unpack and install /gnu/store and /var/guix
258	local pkg="$1"
259	local tmp_path="$2"
260
261	_debug "--- [ $FUNCNAME ] ---"
262
263	cd "$tmp_path"
264	tar --warning=no-timestamp \
265	--extract \
266	--file "$pkg" &&
267	_msg "${PAS}unpacked archive"
268
269	if [[ -e "/var/guix" \|\| -e "/gnu" ]]; then
270	_err "${ERR}A previous Guix installation was found. Refusing to overwrite."
271	exit 1
272	else
273	_msg "${INF}Installing /var/guix and /gnu..."
274	mv "${tmp_path}/var/guix" /var/
275	mv "${tmp_path}/gnu" /
276	fi
277
278	_msg "${INF}Linking the root user's profile"
e9926f80 LC	279	mkdir -p "${ROOT_HOME}/.config/guix"
	280	ln -sf /var/guix/profiles/per-user/root/current-guix \
	281	"${ROOT_HOME}/.config/guix/current"
6f4e8693	282
e9926f80	283	GUIX_PROFILE="${ROOT_HOME}/.config/guix/current"
6f4e8693	284	source "${GUIX_PROFILE}/etc/profile"
e9926f80	285	_msg "${PAS}activated root profile at ${ROOT_HOME}/.config/guix/current"
6f4e8693 RW	286	}
	287
	288	sys_create_build_user()
	289	{ # Create the group and user accounts for build users.
	290
	291	_debug "--- [ $FUNCNAME ] ---"
	292
	293	if [ $(getent group guixbuild) ]; then
	294	_msg "${INF}group guixbuild exists"
	295	else
	296	groupadd --system guixbuild
	297	_msg "${PAS}group <guixbuild> created"
	298	fi
	299
	300	for i in $(seq -w 1 10); do
	301	if id "guixbuilder${i}" &>/dev/null; then
	302	_msg "${INF}user is already in the system, reset"
	303	usermod -g guixbuild -G guixbuild \
	304	-d /var/empty -s "$(which nologin)" \
	305	-c "Guix build user $i" \
	306	"guixbuilder${i}";
	307	else
	308	useradd -g guixbuild -G guixbuild \
	309	-d /var/empty -s "$(which nologin)" \
	310	-c "Guix build user $i" --system \
	311	"guixbuilder${i}";
	312	_msg "${PAS}user added <guixbuilder${i}>"
	313	fi
	314	done
	315	}
	316
	317	sys_enable_guix_daemon()
	318	{ # Run the daemon, and set it to automatically start on boot.
	319
	320	local info_path
	321	local local_bin
	322	local var_guix
	323
	324	_debug "--- [ $FUNCNAME ] ---"
	325
	326	info_path="/usr/local/share/info"
	327	local_bin="/usr/local/bin"
e9926f80	328	var_guix="/var/guix/profiles/per-user/root/current-guix"
6f4e8693 RW	329
	330	case "$INIT_SYS" in
	331	upstart)
	332	{ initctl reload-configuration;
e9926f80	333	cp "${ROOT_HOME}/.config/guix/current/lib/upstart/system/guix-daemon.conf" \
6f4e8693 RW	334	/etc/init/ &&
	335	start guix-daemon; } &&
	336	_msg "${PAS}enabled Guix daemon via upstart"
	337	;;
	338	systemd)
e9926f80	339	{ cp "${ROOT_HOME}/.config/guix/current/lib/systemd/system/guix-daemon.service" \
6f4e8693 RW	340	/etc/systemd/system/;
	341	chmod 664 /etc/systemd/system/guix-daemon.service;
	342	systemctl daemon-reload &&
	343	systemctl start guix-daemon &&
	344	systemctl enable guix-daemon; } &&
	345	_msg "${PAS}enabled Guix daemon via systemd"
	346	;;
	347	NA\|*)
	348	_msg "${ERR}unsupported init system; run the daemon manually:"
e9926f80	349	echo " ${ROOT_HOME}/.config/guix/current/bin/guix-daemon --build-users-group=guixbuild"
6f4e8693 RW	350	;;
	351	esac
	352
	353	_msg "${INF}making the guix command available to other users"
	354
	355	[ -e "$local_bin" ] \|\| mkdir -p "$local_bin"
	356	ln -sf "${var_guix}/bin/guix" "$local_bin"
	357
	358	[ -e "$info_path" ] \|\| mkdir -p "$info_path"
	359	for i in ${var_guix}/share/info/*; do
	360	ln -sf "$i" "$info_path"
	361	done
	362	}
	363
	364	sys_authorize_build_farms()
	365	{ # authorize the public keys of the two build farms
	366	while true; do
	367	read -p "Permit downloading pre-built package binaries from the project's build farms? (yes/no) " yn
	368	case $yn in
e9926f80	369	[Yy]*) guix archive --authorize < "${ROOT_HOME}/.config/guix/current/share/guix/hydra.gnu.org.pub" &&
6f4e8693	370	_msg "${PAS}Authorized public key for hydra.gnu.org";
4a0b87f0 LC	371	guix archive --authorize < "${ROOT_HOME}/.config/guix/current/share/guix/ci.guix.info.pub" &&
4a0b87f0 LC	372	_msg "${PAS}Authorized public key for ci.guix.info";
6f4e8693 RW	373	break;;
	374	[Nn]*) _msg "${INF}Skipped authorizing build farm public keys"
	375	break;;
	376	*) _msg "Please answer yes or no.";
	377	esac
	378	done
	379	}
	380
	381	welcome()
	382	{
	383	cat<<"EOF"
	384	░░░ ░░░
	385	░░▒▒░░░░░░░░░ ░░░░░░░░░▒▒░░
	386	░░▒▒▒▒▒░░░░░░░ ░░░░░░░▒▒▒▒▒░
	387	░▒▒▒░░▒▒▒▒▒ ░░░░░░░▒▒░
	388	░▒▒▒▒░ ░░░░░░
	389	▒▒▒▒▒ ░░░░░░
	390	▒▒▒▒▒ ░░░░░
	391	░▒▒▒▒▒ ░░░░░
	392	▒▒▒▒▒ ░░░░░
	393	▒▒▒▒▒ ░░░░░
	394	░▒▒▒▒▒░░░░░
	395	▒▒▒▒▒▒░░░
	396	▒▒▒▒▒▒░
	397	_____ _ _ _ _ _____ _
	398	/ ____\| \ \| \| \| \| \| / ____\| (_)
	399	\| \| __\| \\| \| \| \| \| \| \| __ _ _ ___ __
	400	\| \| \|_ \| . ' \| \| \| \| \| \| \|_ \| \| \| \| \ \/ /
	401	\| \|__\| \| \|\ \| \|__\| \| \| \|__\| \| \|_\| \| \|> <
	402	\_____\|_\| \_\|\____/ \_____\|\__,_\|_/_/\_\
	403
	404	This script installs GNU Guix on your system
	405
	406	https://www.gnu.org/software/guix/
	407	EOF
	408	echo -n "Press return to continue..."
	409	read -r ANSWER
	410	}
	411
	412	main()
	413	{
	414	local tmp_path
	415	welcome
	416
	417	_msg "Starting installation ($(date))"
	418
	419	chk_term
	420	chk_require "${REQUIRE[*]}"
	421	chk_init_sys
	422	chk_sys_arch
	423
	424	_msg "${INF}system is ${ARCH_OS}"
	425
	426	tmp_path="$(mktemp -t -d guix.XXX)"
	427
	428	guix_get_bin_list "${GNU_URL}"
	429	guix_get_bin "${GNU_URL}" "${BIN_VER}" "$tmp_path"
	430
	431	sys_create_store "${BIN_VER}.tar.xz" "${tmp_path}"
	432	sys_create_build_user
	433	sys_enable_guix_daemon
	434	sys_authorize_build_farms
	435
	436	_msg "${INF}cleaning up ${tmp_path}"
437	rm -r "${tmp_path}"
438
439	_msg "${PAS}Guix has successfully been installed!"
440	_msg "${INF}Run 'info guix' to read the manual."
441	}
442
443	main "$@"