#!/bin/bash

# Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Script to set /etc/lsb-release on the root file system. This script is run by
# build_image inside chroot.

SCRIPT_ROOT=$(readlink -f $(dirname "$0")/..)
. "${SCRIPT_ROOT}/common.sh" || exit 1

# Flags
DEFINE_string board "" "The board to build an image for."
DEFINE_string root "" "The root file system to write /etc/lsb-release to."
DEFINE_string group "" "The default update group for update_engine."

# Parse command line
FLAGS "$@" || exit 1
eval set -- "${FLAGS_ARGV}"

switch_to_strict_mode

ROOT_FS_DIR="$FLAGS_root"
[ -n "$ROOT_FS_DIR" ] || die "--root is required."
[ -d "$ROOT_FS_DIR" ] || die "Root FS does not exist? ($ROOT_FS_DIR)"

OS_NAME="Flatcar Container Linux by Kinvolk"
OS_CODENAME="Oklo"
OS_ID="flatcar"
OS_ID_LIKE="coreos"
OS_PRETTY_NAME="$OS_NAME $FLATCAR_VERSION (${OS_CODENAME})"

FLATCAR_APPID="{e96281a6-d1af-4bde-9a0a-97b76e56dc57}"

# DISTRIB_* are the standard lsb-release names
sudo mkdir -p "${ROOT_FS_DIR}/usr/share/flatcar" "${ROOT_FS_DIR}/etc/flatcar"
sudo_clobber "${ROOT_FS_DIR}/usr/share/flatcar/lsb-release" <<EOF
DISTRIB_ID="$OS_NAME"
DISTRIB_RELEASE=$FLATCAR_VERSION
DISTRIB_CODENAME="$OS_CODENAME"
DISTRIB_DESCRIPTION="$OS_PRETTY_NAME"
EOF
sudo ln -sf "../usr/share/flatcar/lsb-release" "${ROOT_FS_DIR}/etc/lsb-release"

# And the new standard, os-release
# https://www.freedesktop.org/software/systemd/man/os-release.html
sudo_clobber "${ROOT_FS_DIR}/usr/lib/os-release" <<EOF
NAME="$OS_NAME"
ID=$OS_ID
ID_LIKE=$OS_ID_LIKE
VERSION=$FLATCAR_VERSION
VERSION_ID=$FLATCAR_VERSION_ID
BUILD_ID=$FLATCAR_BUILD_ID
SYSEXT_LEVEL=1.0
PRETTY_NAME="$OS_PRETTY_NAME"
ANSI_COLOR="38;5;75"
HOME_URL="https://flatcar.org/"
BUG_REPORT_URL="https://issues.flatcar.org"
FLATCAR_BOARD="$FLAGS_board"
CPE_NAME="cpe:2.3:o:${OS_ID}-linux:${OS_ID}_linux:${FLATCAR_VERSION}:*:*:*:*:*:*:*"
EOF
sudo ln -sf "../usr/lib/os-release" "${ROOT_FS_DIR}/etc/os-release"
sudo ln -sf "../../lib/os-release" "${ROOT_FS_DIR}/usr/share/flatcar/os-release"
# Compat for split of lib64 into lib and lib64
if [ ! -e "${ROOT_FS_DIR}/usr/lib64/os-release" ]; then
  sudo ln -sf "../lib/os-release" "${ROOT_FS_DIR}/usr/lib64/os-release"
fi

# Create the defaults for the coreos configuration files in the usr directory
sudo_clobber "${ROOT_FS_DIR}/usr/share/flatcar/release" <<EOF
FLATCAR_RELEASE_VERSION=$FLATCAR_VERSION
FLATCAR_RELEASE_BOARD=$FLAGS_board
FLATCAR_RELEASE_APPID=$FLATCAR_APPID
EOF

sudo_clobber "${ROOT_FS_DIR}/usr/share/flatcar/update.conf" <<EOF
SERVER=https://public.update.flatcar-linux.net/v1/update/
GROUP=$FLAGS_group
EOF