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rhbootstrap.sh
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#!/bin/sh
# MIT License
#
# Copyright (c) 2020-2022 Serhey Popovych <serhe.popovych@gmail.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
# Requires: mountpoint(1), chroot(1), find(1), xargs(1), install(1), head(1),
# sed(1), mv(1), rm(1), ln(1), cat(1), rpm(1), yum(1), curl(1), id(1),
# uname(1), mount(8), umount(8), setarch(8), chmod(1), rmdir(1),
# base64(1), tr(1), date(1), timeout(1), tee(1), getent(1)
# Set option(s)
set -e
set -u
# Enable debug/trace
#exec 2>"/tmp/${0##*/}.debug.$(date '+%s.%N')"
#set >&2
#set -x
readonly _this_prog='rhbootstrap.sh'
if [ ! -e "$0" -o "$0" -ef "/proc/$$/exe" ]; then
# Executed script is
# a) read from stdin through pipe
# b) specified via -c option
# d) sourced
this_prog="${_this_prog}"
this="$this_prog"
this_dir='./'
else
# Executed script exists and it's inode differs
# from process exe symlink (Linux specific)
this="$0"
this_dir="${this%/*}/"
this_prog="${this##*/}"
[ "$this_prog" != 'sh' ] || this_prog="${_this_prog}"
fi
this_dir="$(cd "$this_dir" && echo "$PWD")"
readonly this this_dir this_prog
# Set program name unless already set
[ -n "${prog_name-}" ] &&
[ -n "${prog_name##*[^[:alnum:]_]*}" ] &&
[ -n "${prog_name##[[:digit:]]*}" ] || prog_name="$this_prog"
readonly _prog_name="$prog_name"
readonly prog_name="${prog_name%\.sh}"
readonly prog_version='1.0'
# Verbosity: report errors by default
[ -n "${V-}" ] && [ "$V" -le 0 -o "$V" -ge 0 ] 2>/dev/null || V=1
# Normalize umask(1)
umask 0022
## Global helpers and steps
true() { :; }
false() { ! :; }
# Usage: shell_type_builtin <name>
shell_type_builtin()
{
local func="${func:-${FUNCNAME:-shell_type_builtin}}"
local name="${1:?missing 1st arg to ${func}() <name>}"
local line
line="$(
{
type "$name" | {
read -r line
printf -- '%s\n' "$line"
}
} 2>/dev/null
)" || return 123
# bash(1) type is 'alias', 'keyword', 'function', 'builtin', or 'file'
case "$line" in
*\ */*)
# file
return 5
;;
*\ alias\ *|*\ aliased\ *)
# alias
return 1
;;
*\ keyword|*\ reserved\ word)
# keyword
return 2
;;
*\ function)
# function
return 3
;;
*\ builtin)
# builtin
return 4
;;
*)
# unknown
return 0
;;
esac
}
# Usage: shell_type_t_builtin <name>
shell_type_t_builtin()
{
local func="${FUNCNAME:-shell_type_t_builtin}"
local rc=0
shell_type_builtin "$@" || rc=$?
local t_0='unknown'
local t_1='alias'
local t_2='keyword'
local t_3='function'
local t_4='builtin'
local t_5='file'
eval "local t=\"\${t_${rc}-}\""
[ -n "$t" ] || return
printf -- '%s\n' "$t"
}
# Usage: shell_type_is_alias <name>
shell_type_is_alias()
{
local func="${FUNCNAME:-shell_type_is_alias}"
local rc=0
shell_type_builtin "$@" || rc=$?
[ $rc -eq 1 ] || return
}
# Usage: shell_type_is_keyword <name>
shell_type_is_keyword()
{
local func="${FUNCNAME:-shell_type_is_keyword}"
local rc=0
shell_type_builtin "$@" || rc=$?
[ $rc -eq 2 ] || return
}
# Usage: shell_type_is_function <name>
shell_type_is_function()
{
local func="${FUNCNAME:-shell_type_is_function}"
local rc=0
shell_type_builtin "$@" || rc=$?
[ $rc -eq 3 ] || return
}
# Usage: shell_type_is_builtin <name>
shell_type_is_builtin()
{
local func="${FUNCNAME:-shell_type_is_builtin}"
local rc=0
shell_type_builtin "$@" || rc=$?
[ $rc -eq 4 ] || return
}
# Usage: shell_type_is_file <name>
shell_type_is_file()
{
local func="${FUNCNAME:-shell_type_is_file}"
local rc=0
shell_type_builtin "$@" || rc=$?
[ $rc -eq 5 ] || return
}
# Usage: msg <fmt> ...
msg()
{
local rc=$?
local func="${FUNCNAME:-msg}"
local fmt="${1:?missing 1st arg to ${func}() (<fmt>)}"
shift
[ $V -le 0 ] || printf -- "$fmt" "$@"
return $rc
}
# Usage: info <fmt> ...
info()
{
msg "$@" || return
}
# Usage: error <fmt> ...
error()
{
msg "$@" >&2 || return
}
# Usage: error_exit
error_exit()
{
error "$@" || exit
}
# Usage: fatal <fmt> ...
fatal()
{
local rc=$?
# Usage: return_rc
return_rc()
{
[ $rc -ne 0 ] && return $rc || return 123
}
printf >&2 -- '%s: ' "$prog_name"
return_rc || error_exit "$@"
}
# Usage: abort <fmt> ...
abort()
{
local rc=$?
trap - EXIT
V=1 error "$@" ||:
exit $rc
}
# Usage: _exit [<rc>]
_exit()
{
local _rc=$?
trap - EXIT
local rc="${1:-${_rc}}"
[ "$rc" -ge 0 -o "$rc" -lt 0 ] 2>/dev/null || rc=${_rc}
exit $rc
}
__cfg_comment__=''
# Usage: cfg_begin <comment>
cfg_begin()
{
local func="${FUNCNAME:-cfg_begin}"
if [ -n "${__cfg_comment__}" ]; then
fatal '%s: config nesting is not supported: end config "%s" first.\n' \
"${func}" \
"${__cfg_comment__}" \
#
fi
local comment="${1:?missing 1st arg to ${func}() <comment>}"
printf -- '## %s-begin-%s\n' \
"$prog_name" \
"$comment" \
#
__cfg_comment__="$comment"
}
# Usage: cfg_end <comment>
cfg_end()
{
local func="${FUNCNAME:-cfg_end}"
if [ -z "${__cfg_comment__}" ]; then
fatal '%s: no config to end: begin new config first.\n' \
"${func}" \
#
fi
local comment="${1:?missing 1st arg to ${func}() <comment>}"
if [ "${comment}" != "${__cfg_comment__}" ]; then
fatal '%s: config commet mismatch: begin with "%s", end with "%s"\n' \
"${func}" \
"${__cfg_comment__}" \
"${comment}" \
#
fi
printf -- '## %s-end-%s\n' \
"$prog_name" \
"$comment" \
#
__cfg_comment__=''
}
# Usage: cfg_strip <comment> [<file>]
cfg_strip()
{
local func="${FUNCNAME:-cfg_strip}"
local comment="${1:?missing 1st arg to ${func}() <comment>}"
local file="${2-}"
local begin_r="^$(
__cfg_comment__='' cfg_begin "$comment" | \
sed -e 's,[]\/$*.^[],\\&,g'
)$"
local end_r="^$(
__cfg_comment__="${comment}" cfg_end "$comment" | \
sed -e 's,[]\/$*.^[],\\&,g'
)$"
sed ${file:+-i "$file"} \
-e "/$begin_r/,/$end_r/ d" \
#
}
# Usage: cfg_replace <comment> <file> [<text>]
cfg_replace()
{
local func="${FUNCNAME:-cfg_replace}"
local comment="${1:?missing 1st arg to ${func}() <comment>}"
local file="${2:?missing 2d arg to ${func}() <file>}"
local text="${3-}"
if [ -n "$text" ]; then
local begin="$(__cfg_comment__='' cfg_begin "$comment")"
local end="$(__cfg_comment__="${comment}" cfg_end "$comment")"
local begin_r="^$(
printf -- '%s\n' "$begin" | \
sed -e 's,[]\/$*.^[],\\&,g'
)\$"
local end_r="^$(
printf -- '%s\n' "$end" | \
sed -e 's,[]\/$*.^[],\\&,g'
)\$"
local addr="/$begin_r/,/$end_r/"
if [ -n "$(sed -n -e "$addr p" "$file")" ]; then
# replace
text="$(
printf -- '%s\n%s\n%s\n' \
"$begin" "$text" "$end" | \
sed -e 's,$,\\,'
)"
text="${text%\\}"
sed -i "$file" \
-e "$addr c$text" \
#
else
# append
if ! [ -n "${_cfg_replace_append_nohdr-}" ]; then
text="$begin
$text
$end
"
fi
printf -- '%s' "$text" >>"$file"
fi
else
cfg_strip "$comment" "$file"
fi
}
# Usage: cfg_replace_append_nohdr <comment> <file> [<text>]
cfg_replace_append_nohdr()
{
local _cfg_replace_append_nohdr='1'
cfg_replace "$@" || return
}
# Usage: safe_curl <url> <size> [<curl(1) options>...]
safe_curl()
{
local func="${FUNCNAME:-safe_curl}"
local url="${1:?missing 1st arg to ${func}() <url>}" && shift
local size="${1:?missing 2d arg to ${func}() <size>}" && shift
[ "$size" -gt 0 ] 2>/dev/null
exec 4>&1
eval $(
exec 3>&1
{
curl "$@" -f -s "$url"
echo >&3 "local rc=$?"
} | head -c $size >&4
)
exec 4>&-
return $rc
}
# Usage: has_enable <var>
has_enable()
{
local rc=$?
local func="${FUNCNAME:-has_enable}"
local var="${1:?missing 1st arg to ${func}() <var>}"
var="has_${var#has_}"
eval "$var=\$((\${$var-0} + 1)) && [ "\$$var" -gt 0 ] || $var=''"
return $rc
}
# Usage: has_disable <var>
has_disable()
{
local rc=$?
local func="${FUNCNAME:-has_disable}"
local var="${1:?missing 1st arg to ${func}() <var>}"
var="has_${var#has_}"
eval "$var=\$((\${$var-0} - 1)) && [ "\$$var" -gt 0 ] || $var=''"
return $rc
}
# Usage: pkg_name <pkg_name>
pkg_name()
{
local func="${func:-${FUNCNAME:-pkg_name}}"
local pkg_name="${1:?missing 1st arg to ${func}() <pkg_name>}"
pkg_name="${pkg_name#pkg_}"
[ -n "$pkg_name" ] || return
pkg_name="pkg_$pkg_name"
echo "pkg_name='$pkg_name'"
}
# Usage: pkg_val <pkg_name>
pkg_val()
{
local func="${func:-${FUNCNAME:-pkg_val}}"
local pkg_name
eval "$(pkg_name "${1-}")" || return
eval "local pkg_val=\"\${$pkg_name-}\""
echo "$pkg_val"
}
# Usage: pkg_switch <pkg_name> [<0|1>]
pkg_switch()
{
local pkg_name
eval "$(pkg_name "${1-}")" || return
eval "local pkg_val=\"\${$pkg_name-}\""
if [ "$pkg_val" -eq 0 ] 2>/dev/null; then
eval "$pkg_name=''"
else
local on_off="${2-}"
case "$on_off" in
'') on_off="$pkg_val" ;;
0) on_off='' ;;
*) on_off=1 ;;
esac
eval "$pkg_name='$on_off'"
fi
}
# Usage: pkg_enable <pkg_name>
pkg_enable()
{
local func="${FUNCNAME:-pkg_enable}"
pkg_switch "${1-}" 1
}
# Usage: pkg_disable <pkg_name>
pkg_disable()
{
local func="${FUNCNAME:-pkg_disable}"
pkg_switch "${1-}" 0
}
# Usage: pkg_is_installed <pkg_name>
pkg_is_installed()
{
local func="${FUNCNAME:-pkg_is_installed}"
local pkg_name="${1:?missing 1st arg to ${func}() <pkg_name>}"
pkg_name="${pkg_name#pkg_}"
in_chroot "$install_root" "rpm --query '$pkg_name' >/dev/null 2>&1" || return
}
# Usage: _env [NAME=VALUE]... [COMMAND [ARG]...]
_env()
{
local _env_exec="${_env_exec-}"
[ -z "${_env_exec}" ] || _env_exec='exec'
local H="${helpers_dir:+${helpers_dir%/}}"
local P='/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'
${_env_exec} env -i \
TERM="${TERM:-vt220}" \
PATH="${H:+$H:}$P" \
USER="${USER:-root}" \
HOME='/' \
LANG='C' \
"$@"
#
}
# Usage: in_env ...
in_env()
{
local _env_exec=''
_env "$@" || return
}
# Usage: in_env_exec ...
in_env_exec()
{
local _env_exec='1'
_env "$@" || return
}
# Usage: _in_chroot [NAME=VALUE]... [--] <dir> <cmd> [-|command name] [<arg> ...]
_in_chroot()
{
local func="${func:-${FUNCNAME:-_in_chroot}}"
local env_vars=''
while [ $# -gt 0 ]; do
case "$1" in
[[:alpha:]_]*=*)
env_vars="${env_vars:+$env_vars }'$1'"
;;
--)
shift
break
;;
# errors
--*)
printf >&2 -- '%s: unknown option: %s\n' "$func" "$1"
return 1
;;
*)
break
;;
esac
shift
done
local dir="${1:?missing 1st arg to ${func}() <dir>}"
local cmd="${2:?missing 2d arg to ${func}() <cmd>}"
shift 2
local helpers_dir="/${helpers_dir#$install_root}"
local _env_exec="${_in_chroot_exec-}"
eval "
_env $env_vars \
setarch '$basearch' \
chroot '$dir' /bin/sh -c \"\$cmd\" \"\$@\" ||
return
"
}
# Usage: in_chroot <dir> <cmd> [<arg> ...]
in_chroot()
{
local func="${FUNCNAME:-in_chroot}"
local _in_chroot_exec=''
_in_chroot "$@" || return
}
# Usage: in_chroot_exec <dir> <cmd> [<arg> ...]
in_chroot_exec()
{
local func="${FUNCNAME:-in_chroot_exec}"
local _in_chroot_exec='1'
_in_chroot "$@" || return
}
# Usage: host_gpg_import <gpgkey>
host_gpg_import()
{
local func="${FUNCNAME:-host_gpg_import}"
local gpgkey="${1:?missing 1st arg to ${func}() <gpgkey>}"
gpgkey="$rpm_gpg_dir${gpgkey#$rpm_gpg_dir}"
setarch "$basearch" \
rpm --root="$install_root" \
--import "$gpgkey" ||
return
}
# Usage: in_chroot_gpg_import <gpgkey>
in_chroot_gpg_import()
{
local func="${FUNCNAME:-in_chroot_gpg_import}"
local gpgkey="${1:?missing 1st arg to ${func}() <gpgkey>}"
gpgkey="$rpm_gpg_dir${gpgkey#$rpm_gpg_dir}"
in_chroot <"$gpgkey" "$install_root" "rpm --import '/dev/stdin'" || return
}
# Usage: selinuxenabled
selinuxenabled()
{
in_chroot "$install_root" '
{
# libselinux-utils
command -v selinuxenabled || exit 3
# SELinux enabled
selinuxenabled || exit 2
} >/dev/null 2>&1
' || return
}
# Usage: semode_text2rc <mode>
semode_text2rc()
{
case "${1-}" in
'0'|'Permissive')
return 0
;;
'1'|'Enforcing')
return 1
;;
'2'|'Disabled')
return 2
;;
*)
local func="${FUNCNAME:-semode_text2rc}"
echo >&2 "${func}: invalid <mode>, see setenforce(8) for valid modes"
return 3
;;
esac
}
# Usage: _setenforce <mode>
_setenforce()
{
in_chroot "$install_root" '
{
# libselinux-utils
command -v setenforce || exit
# Set mode
setenforce "$1"
} >/dev/null 2>&1
' - "$1" || return 3
}
# Usage: setenforce <mode>
setenforce()
{
local mode="${1-2}"
semode_text2rc "$mode" && mode=0 || mode=$?
[ $mode -lt 2 ] || return 3
_setenforce $mode || return
}
# Usage: getenforce
getenforce()
{
local mode
mode="$(
in_chroot "$install_root" '
{
# libselinux-utils
command -v getenforce >&2 || exit
# Get mode
getenforce
} 2>/dev/null
'
)" || return 3
semode_text2rc "$mode" || return
}
# Usage: selinux_enforce()
selinux_enforce() { setenforce 1 || return; }
# Usage: selinux_permissive()
selinux_permissive() { setenforce 0 || return; }
# Usage: setenforce_save <mode>
setenforce_save()
{
local mode=${__selinux_saved_mode__-3}
[ $mode -gt 2 ] || return 123
semode_text2rc "${1-}" && mode=0 || mode=$?
[ $mode -lt 2 ] || return 3
local rc=0
getenforce || rc=$?
case $rc in
0|1) ;; # Permissive,Enforced
2) mode=$rc ;; # Disabled
*) return $rc ;; # error
esac
__selinux_saved_mode__=$rc
[ $mode -eq $rc ] || _setenforce $mode || return
}
# Usage: setenforce_restore
setenforce_restore()
{
local mode=${__selinux_saved_mode__-3}
[ $mode -le 2 ] || return 123
unset __selinux_saved_mode__
[ $mode -eq 2 ] || _setenforce $mode || return
}
# Usage: _yum [NAME=VALUE]... [--] ...
_yum()
{
local func="${func:-${FUNCNAME:-_yum}}"
local env_vars=''
while [ $# -gt 0 ]; do
case "$1" in
[[:alpha:]_]*=*)
env_vars="${env_vars:+$env_vars }'$1'"
;;
--)
shift
break
;;
*)
break
;;
esac
shift
done
local cmd="exec ${_xargs_yum:+xargs }yum \"\$@\""
set -- \
${install_langs:+
${has_setopt:+"--setopt=override_install_langs=$install_langs"}
} \
${nodocs:+
${has_setopt:+'--setopt=tsflags=nodocs'}
} \
${install_weak_deps:+
${has_setopt:+"--setopt=install_weak_deps=$install_weak_deps"}
} \
${has_setopt:+"--setopt=strict=True"} \
"$@" \
#
eval "
if [ -n '${_install_root-}' ]; then
in_chroot $env_vars '${_install_root}' '$cmd' - \"\$@\"
else
in_env $env_vars setarch '$basearch' /bin/sh -c '$cmd' - \"\$@\"
fi || return
"
}
# Usage: yum ...
yum()
{
local _install_root=''
local _xargs_yum=''
_yum "$@" || return
}
# Usage: in_chroot_yum ...
in_chroot_yum()
{
local _install_root="${install_root-}"
local _xargs_yum=''
_yum "$@" || return
}
# Usage: xargs_yum ...
xargs_yum()
{
local _install_root=''
local _xargs_yum='1'
_yum "$@" || return
}
# Usage: in_chroot_xargs_yum ...
in_chroot_xargs_yum()
{
local _install_root="${install_root-}"
local _xargs_yum='1'
_yum "$@" || return
}
# Usage: return_var() <rc> <result> [<var>]
return_var()
{
local func="${FUNCNAME:-return_var}"
local rv_rc="${1:?missing 1st arg to ${func}() (<rc>)}"
local rv_result="${2-}"
local rv_var="${3-}"
if [ -n "${rv_var}" ]; then
eval "${rv_var}='${rv_result}'"
else
echo "${rv_result}"
fi
return ${rv_rc}
}
# Usage: version_cmp <v1> <v2> [<var_result>]
version_cmp()
{
local func="${FUNCNAME:-version_cmp}"
local v1="${1:?missing 1st arg to ${func}() <v1>}"
local v2="${2:?missing 2d arg to ${func}() <v2>}"
# Test cases:
# -----------
# version_cmp 5 5.0 -> 0
# version_cmp 5.10 5.a -> 1
# version_cmp 5a 5.0 -> -1
# version_cmp 5.0a 5.0 -> -1
# version_cmp 5alpha1 5.0 -> -1
# version_cmp 5beta1 5.0alpha1 -> 1
# version_cmp 5rc1 5-rc1 -> 0
# version_cmp 5.0-rc1 5.0rc1 -> 0
# version_cmp 5.0rc1 5beta1 -> 1
# version_cmp 5.0rc1 5.0 -> -1
# version_cmp 5.01 5.1 -> -1
# version_cmp 4.99 5.0 -> -1
# version_cmp 5.10 30 -> -1
# version_cmp 5.a.b.c 5.a.b.c -> 0
# version_cmp 5.a.b.c 5.a.b.d -> -1
# version_cmp a.b.c d.e.f -> -1
#
# Uncomment to make output like above:
# ------------------------------------
#echo -n "${func} $v1 $v2 -> "
# Only supported characters
[ -n "${v1##*[^[:alnum:].-]*}" ] || return
[ -n "${v2##*[^[:alnum:].-]*}" ] || return
# Translate '-' to '.'; make sure there is no empty subversion (..)
v1="$(echo "$v1" | sed 'y/-/./')" &&
v1=".$v1." && [ -n "${v1##*..*}" ] && v1="${v1#.}" && v1="${v1%.}" || return
v2="$(echo "$v2" | sed 'y/-/./')" &&
v2=".$v2." && [ -n "${v2##*..*}" ] && v2="${v2#.}" && v2="${v2%.}" || return
# Strip release type (i.e. a, alpha1, b, beta2, rc5, etc); end with '.'
local p1 p2 t
p1="${v1##*.}" && while :
do
t="${p1#[[:digit:]]}" && [ "$t" != "$p1" ] && p1="$t" || break
done
v1="${v1%$p1}" && v1="${v1%.}" && v1="$v1."
p2="${v2##*.}" && while :
do
t="${p2#[[:digit:]]}" && [ "$t" != "$p2" ] && p2="$t" || break
done
v2="${v2%$p2}" && v2="${v2%.}" && v2="$v2."
# Pad with '0.' to make version length equal
local c1 c2
c1=$(IFS='.' && set -- $v1 && echo $#)
c2=$(IFS='.' && set -- $v2 && echo $#)
t=$((c1 - c2))
while [ $t -ne 0 ]; do
if [ $t -lt 0 ]; then
v1="${v1}0."
: $((t += 1))
else
v2="${v2}0."
: $((t -= 1))
fi
done
# Append release type creating one if missing using 'z'
if [ -z "$p1" ]; then
t=${#p2}
while [ $((t -= 1)) -ge 0 ]; do
p1="${p1}z"
done
elif [ -z "$p2" ]; then
t=${#p1}
while [ $((t -= 1)) -ge 0 ]; do
p2="${p2}z"
done
fi
v1="${v1}${p1:+$p1.}"
v2="${v2}${p2:+$p2.}"
# For each subversion: compare
while :; do
c1="${v1%%.*}" && v1="${v1#$c1.}"
c2="${v2%%.*}" && v2="${v2#$c2.}"
[ "$c1" = "$c2" ] || break
if [ -z "$v1" ]; then
return_var 0 '0' "${3-}" && return
fi
done
# Force lexicographical comparison in expr(1) when value starts with '0'
[ -n "${c1##0*}" ] || c1="$c1."
[ -n "${c2##0*}" ] || c2="$c2."
expr "$c1" '>' "$c2" >/dev/null && return_var $? '1' "${3-}" && return ||:
expr "$c1" '<' "$c2" >/dev/null && return_var $? '-1' "${3-}" && return ||:
# Never reached
return 3
}
version_lt() { [ "$(version_cmp "$@")" = '-1' ] || return; }
version_eq() { [ "$(version_cmp "$@")" = '0' ] || return; }
version_gt() { [ "$(version_cmp "$@")" = '1' ] || return; }
version_le() { [ "$(version_cmp "$@")" -le '0' ] || return; }
version_ge() { [ "$(version_cmp "$@")" -ge '0' ] || return; }
version_neq() { ! version_eq "$@" || return; }
is_rocky() { [ "${distro-}" = 'rocky' ] || return; }
is_centos() { [ "${distro-}" = 'centos' ] || return; }
is_fedora() { [ "${distro-}" = 'fedora' ] || return; }
is_centos_stream() { is_centos && [ -z "${releasever%%*-stream}" ] || return; }
centos_stream_compose_id()
{
is_centos || return
local r="${releasever%-stream}"
[ "$r" != "$releasever" ] || return
if [ -n "${baseurl-}" ]; then
local url="${baseurl%%/$releasever/*}/$releasever/COMPOSE_ID"
r="$(
safe_curl "$url" 1024 | \
sed -n \
-e "1 {s/^CentOS-Stream-$r-\(\S\+\)\s*$/\1/p;q}"
)"