epm-sh-functions

#!/bin/sh
#
# Copyright (C) 2012, 2014  Etersoft
# Copyright (C) 2012, 2014  Vitaly Lipatov <lav@etersoft.ru>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#

# copied from /etc/init.d/outformat (ALT Linux)

# FIXME on Android: FIX ME! implement ttyname_r() bionic/libc/bionic/stubs.c:366
inputisatty()
{
	# check stdin
	tty -s 2>/dev/null
}

isatty()
{
	# check stdout
	test -t 1
}

isatty2()
{
	# check stderr
	test -t 2
}

check_tty()
{
	isatty2 || return

	# Set a sane TERM required for tput
	[ -n "$TERM" ] || TERM=dumb
	export TERM

	# egrep from busybox may not --color
	# egrep from MacOS print help to stderr
	if grep -E --help 2>&1 | grep -q -- "--color" ; then
		export EGREPCOLOR="--color"
	fi

	which tput >/dev/null 2>/dev/null || return
	# FreeBSD does not support tput -S
	echo | tput -S >/dev/null 2>/dev/null || return
	[ -z "$USETTY" ] || return
	export USETTY=1
}

: ${BLACK:=0} ${RED:=1} ${GREEN:=2} ${YELLOW:=3} ${BLUE:=4} ${MAGENTA:=5} ${CYAN:=6} ${WHITE:=7}

set_boldcolor()
{
	[ "$USETTY" = "1" ] || return
	{
		echo bold
		echo setaf $1
	} |tput -S
}

restore_color()
{
	[ "$USETTY" = "1" ] || return
	{
		echo op; # set Original color Pair.
		echo sgr0; # turn off all special graphics mode (bold in our case).
	} |tput -S
}

echover()
{
    [ -z "$verbose" ] && return
    echo "$*" >&2
}

# echo string without EOL
echon()
{
	# default /bin/sh on MacOS does not recognize -n
	/bin/echo -n "$*"
}


# Used DISTRNAME
set_target_pkg_env()
{
	[ -n "$DISTRNAME" ] || fatal "Missing DISTRNAME in set_target_pkg_env."
	PKGFORMAT=$($DISTRVENDOR -p "$DISTRNAME")
	PKGVENDOR=$($DISTRVENDOR -s "$DISTRNAME")
	RPMVENDOR=$($DISTRVENDOR -n "$DISTRNAME")
}

# Print command line and run command line
showcmd()
{
	if [ -z "$quiet" ] ; then
		set_boldcolor $GREEN
		local PROMTSIG="\$"
		[ "$EFFUID" = 0 ] && PROMTSIG="#"
		echo " $PROMTSIG $*"
		restore_color
	fi >&2
}

# Print command line and run command line
docmd()
{
	showcmd "$*$EXTRA_SHOWDOCMD"
#FIXME
	$@
}

# Run every arg with docmd
docmd_foreach()
{
	local cmd pkg
	cmd="$1"
	#showcmd "$@"
	shift
	for pkg in "$@" ; do
		docmd "$cmd" $pkg
	done
}

# Print command line and run command line with SUDO
sudocmd()
{
	[ -n "$SUDO" ] && showcmd "$SUDO $*" || showcmd "$*"
	$SUDO $@
}

# Run every arg with sudocmd
# Returns on any error
sudocmd_foreach()
{
	local cmd pkg
	cmd="$1"
	#showcmd "$@"
	shift
	for pkg in "$@" ; do
		sudocmd "$cmd" $pkg || return
	done
}

# add realpath if missed
if ! which realpath 2>/dev/null >/dev/null ; then
realpath()
{
	readlink -f "$@"
}
fi

get_firstarg()
{
	echon "$1"
}

get_lastarg()
{
	local lastarg
	eval "lastarg=\${$#}"
	echon "$lastarg"
}

# TODO: see etersoft-build-utils/tests/test_isnumber.sh
isnumber()
{
	echo "$*" | filter_strip_spaces | grep -q "^[0-9]\+$"
}

filter_strip_spaces()
{
        # possible use just
        #xargs echo
        sed -e "s| \+| |g" | \
                sed -e "s|^ ||" | sed -e "s| \$||"
}

strip_spaces()
{
        echo "$*" | filter_strip_spaces
}

# param true false
subst_option()
{
	eval "[ -n \"\$$1\" ]" && echo "$2" || echo "$3"
}

store_output()
{
    # use make_temp_file from etersoft-build-utils
    RC_STDOUT=$(mktemp)
    local CMDSTATUS=$RC_STDOUT.pipestatus
    echo 1 >$CMDSTATUS
    #RC_STDERR=$(mktemp)
    ( $@ 2>&1 ; echo $? >$CMDSTATUS ) | tee $RC_STDOUT
    return "$(cat $CMDSTATUS)"
    # bashism
    # http://tldp.org/LDP/abs/html/bashver3.html#PIPEFAILREF
    #return $PIPESTATUS
}

showcmd_store_output()
{
    showcmd "$@"
    store_output "$@"
}

clean_store_output()
{
    rm -f $RC_STDOUT $RC_STDOUT.pipestatus
}

# run epm, possible from side repo
epm()
{
	[ -n "$PROGNAME" ] || fatal "Can't use epm call from the piped script"
	$PROGDIR/$PROGNAME $@
}

# Print error message and stop the program
fatal()
{
	if [ -z "$TEXTDOMAIN" ] ; then
		echo "Error: $*" >&2
#	else
#		echog "Error in $0: $@" >&2
	fi
	exit 1
}

# Print warning message
warning()
{
	if [ -z "$TEXTDOMAIN" ] ; then
		echo "Warning: $*" >&2
#	else
#		echog "Error in $0: $@" >&2
	fi
}

info()
{
	[ -n "$quiet" ] && return

	# print message to stderr if stderr forwarded to (a file)
	if isatty2 ; then
		isatty || return 0
		echo "$*"
	else
		echo "$*" >&2
	fi
}

set_sudo()
{
	SUDO=""
	# skip SUDO if disabled
	[ -n "$EPMNOSUDO" ] && return
	if [ "$DISTRNAME" = "Cygwin" ] || [ "$DISTRNAME" = "Windows" ] ; then
		# skip sudo using on Windows
		return
	fi

	EFFUID=$(id -u)

	# do not need sudo
	[ $EFFUID = "0" ] && return

	# use sudo if possible
	if which sudo >/dev/null 2>/dev/null ; then
		SUDO="sudo --"
		# check for < 1.7 version which do not support -- (and --help possible too)
		sudo -h 2>/dev/null | grep -q "  --" || SUDO="sudo"
		return
	fi

	SUDO="fatal 'Can't find sudo. Please install sudo or run epm under root.'"
}

# wait for n seconds (if possible) during executing command
# args: seconds command
withtimeout()
{
	local TO=$(which timeout 2>/dev/null || which gtimeout 2>/dev/null)
	if [ -x "$TO" ] ; then
		$TO "$@"
		return
	fi
	# fallback: drop time arg and run without timeout
	shift
	"$@"
}

set_eatmydata()
{
	# skip if disabled
	[ -n "$EPMNOEATMYDATA" ] && return
	# use if possible
	which eatmydata >/dev/null 2>/dev/null || return
	[ -n "$SUDO" ] && SUDO="$SUDO eatmydata" || SUDO="eatmydata"
	[ -n "$verbose" ] && info "Uwaga! eatmydata is installed, we will use it for disable all sync operations."
	return 0
}

# 
__get_package_for_command()
{
	case "$1" in
		equery|revdep-rebuild)
			echo 'gentoolkit'
			;;
		update-kernel|remove-old-kernels)
			echo 'update-kernel'
			;;
	esac
}

# TODO:
confirm() {
    local response
    # call with a prompt string or use a default
    read -r -p "${1:-Are you sure? [y/N]} " response
    case $response in
        [yY][eE][sS]|[yY])
            true
            ;;
        *)
            false
            ;;
    esac
}

assure_root()
{
	[ "$EFFUID" = 0 ] || fatal "run me only under root"
}

regexp_subst()
{
	local expression="$1"
	shift
	sed -i -r -e "$expression" "$@"
}

# TODO: we we can't use epm directly?
assure_exists()
{
	load_helper epm-assure
	local package="$2"
	local textpackage=
	[ -n "$package" ] || package="$(__get_package_for_command "$1")"
	[ -n "$3" ] && textpackage=" >= $3"
	__epm_assure "$1" $package $3 || fatal "Can't assure in '$1' command from $package$textpackage package"
}

# will replaced within disabled_eget in packaged version
eget()
{
	# use internal eget only if exists
	if [ -s $SHAREDIR/tools_eget ] ; then
		$SHAREDIR/tools_eget "$@"
		return
	fi

	assure_exists eget
	# run external command, not the function
	EGET=$(which eget) || fatal "Missed command eget from installed package eget"
	$EGET "$@"
}

# will replaced within eget() in packed version
onefile_eget()
{
	assure_exists wget
	internal_tools_eget "$@"
}

# TODO: improve and drop!
get_package_type()
{
	local i
	case $1 in
		*.deb)
			echo "deb"
			return
			;;
		*.rpm)
			echo "rpm"
			return
			;;
		*.txz)
			echo "txz"
			return
			;;
		*.tbz)
			echo "tbz"
			return
			;;
		*.exe)
			echo "exe"
			return
			;;
		*.msi)
			echo "msi"
			return
			;;
		*)
			#fatal "Don't know type of $1"
			# return package name for info
			echo "$1"
			return 1
			;;
	esac
}


# print options description from HELPCMD/HELPOPT lines in the code
get_help()
{
    if [ "$0" = "/dev/stdin" ] || [ "$0" = "sh" ] ; then
        return
    fi

    grep -v -- "^#" $0 | grep -- "# $1" | while read -r n ; do
        opt=$(echo $n | sed -e "s|) # $1:.*||g")
        desc=$(echo $n | sed -e "s|.*) # $1:||g")
        printf "    %-20s %s\n" $opt "$desc"
    done
}


# FIXME: detect if not recognized
set_pm_type()
{
	local CMD

	# Fill for use: PMTYPE, DISTRNAME, DISTRVERSION, PKGFORMAT, PKGVENDOR, RPMVENDOR
	DISTRVENDOR=$PROGDIR/distr_info
	[ -n "$DISTRNAME" ] || DISTRNAME=$($DISTRVENDOR -d) || fatal "Can't get distro name."
	[ -n "$DISTRVERSION" ] || DISTRVERSION=$($DISTRVENDOR -v)
	set_target_pkg_env

# override package manager detection result
if [ -n "$FORCEPM" ] ; then
	PMTYPE=$FORCEPM
	return
fi

# TODO: move it in distr_vendor?
# FIXME: some problems with multibased distros (Server Edition on CentOS and Desktop Edition on Ubuntu)
case $DISTRNAME in
	ALTLinux)
		CMD="apt-rpm"
		#which ds-install 2>/dev/null >/dev/null && CMD=deepsolver-rpm
		;;
	PCLinux)
		CMD="apt-rpm"
		;;
	Ubuntu|Debian|Mint|AstraLinux|Elbrus)
		CMD="apt-dpkg"
		#which aptitude 2>/dev/null >/dev/null && CMD=aptitude-dpkg
		which snappy 2>/dev/null >/dev/null && CMD=snappy
		;;
	Mandriva|ROSA)
		CMD="urpm-rpm"
		;;
	FreeBSD|NetBSD|OpenBSD|Solaris)
		CMD="pkgsrc"
		which pkg 2>/dev/null >/dev/null && CMD=pkgng
		;;
	Gentoo)
		CMD="emerge"
		;;
	ArchLinux)
		CMD="pacman"
		;;
	Fedora|LinuxXP|ASPLinux|CentOS|RHEL|Scientific|GosLinux)
		CMD="yum-rpm"
		which dnf 2>/dev/null >/dev/null && test -d /var/lib/dnf/yumdb && CMD=dnf-rpm
		;;
	Slackware)
		CMD="slackpkg"
		;;
	SUSE|SLED|SLES|Tumbleweed)
		CMD="zypper-rpm"
		;;
	ForesightLinux|rPathLinux)
		CMD="conary"
		;;
	Windows)
		CMD="chocolatey"
		;;
	MacOS)
		CMD="homebrew"
		;;
	OpenWRT)
		CMD="ipkg"
		;;
	GNU/Linux/Guix)
		CMD="guix"
		;;
	Android)
		CMD="android"
		;;
	Cygwin)
		CMD="aptcyg"
		;;
	alpine)
		CMD="apk"
		;;
	TinyCoreLinux)
		CMD="tce"
		;;
	VoidLinux)
		CMD="xbps"
		;;
	*)
		fatal "Have no suitable DISTRNAME $DISTRNAME"
		;;
esac
PMTYPE=$CMD
}


is_active_systemd()
{
	local a
	SYSTEMCTL=/bin/systemctl
	SYSTEMD_CGROUP_DIR=/sys/fs/cgroup/systemd
	[ -x "$SYSTEMCTL" ] || return
	[ -d "$SYSTEMD_CGROUP_DIR" ] || return
	a='' mountpoint -q "$SYSTEMD_CGROUP_DIR" || return
	readlink /sbin/init | grep -q 'systemd' || return
	# some hack
	# shellcheck disable=SC2009
	ps ax | grep '[s]ystemd' | grep -q -v 'systemd-udev'
}