byobu/lib/byobu/release

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#!/bin/sh -e
__release() {
local RELEASE="${RELEASE}"
if [ -n "$RELEASE" ]; then
true
elif [ "$(uname)" = "OpenBSD" ]; then
# OpenBSD
RELEASE=$(uname -r)
elif [ "$(uname)" = "FreeBSD" ]; then
# FreeBSD
RELEASE=$(freebsd-version | cut -d'-' -f1)
elif [ -r "/etc/os-release" ]; then
if grep -q -E '^(Arch|Artix|Gentoo|Void)' /etc/os-release; then
RELEASE="" # ローリングリリースの場合
elif grep -q -E '^ID=crux' /etc/os-release; then
RELEASE=$(. /etc/os-release && echo "$VERSION")
else
RELEASE=$(. /etc/os-release && echo "$VERSION_ID")
fi
elif [ -r "/etc/issue" ]; then
local issue
read issue < /etc/issue
case "$issue" in
Ubuntu*)
set -- $issue;
RELEASE="$2";
;;
Debian*)
local ver
read ver < /etc/debian_version
RELEASE="$ver"
;;
esac
elif eval $BYOBU_TEST sw_vers >/dev/null 2>&1; then
RELEASE="$(sw_vers -productVersion)"
fi
if [ -z "$RELEASE" ] && eval $BYOBU_TEST lsb_release >/dev/null 2>&1; then
RELEASE=$(lsb_release -s -r)
fi
if [ -n "$RELEASE_ABBREVIATED" ] && [ $RELEASE_ABBREVIATED -gt 0 ]; then
color bold2; printf "%.${RELEASE_ABBREVIATED}s" "$RELEASE"; color --
else
color bold2; printf "%s" "$RELEASE"; color --
fi
}