#!/usr/bin/env python3
#
# Copyright (C) 2018 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# File: live-build-config
# Purpose:
#   Creates a live-build config command from template using the build config
#   and executes it, to prepare the system for building the installation ISO.


import sys
import os
import shutil
import json

import pystache

import defaults
import util

util.check_build_config()

lb_config_tmpl = """
lb config noauto \
        --architectures {{architecture}} \
        --bootappend-live "boot=live components hostname=vyos username=live nopersistence noautologin nonetworking union=overlay console=ttyS0,115200 console=tty0 net.ifnames=0 biosdevname=0" \
        --bootappend-live-failsafe "live components memtest noapic noapm nodma nomce nolapic nomodeset nosmp nosplash vga=normal console=ttyS0,115200 console=tty0 net.ifnames=0 biosdevname=0" \
        --linux-flavours {{kernel_flavor}} \
        --linux-packages linux-image-{{kernel_version}} \
        --bootloader syslinux,grub-efi \
        --binary-images iso-hybrid \
        --checksums 'sha256 md5' \
        --debian-installer false \
        --distribution {{distribution}} \
        --iso-application "VyOS" \
        --iso-publisher "{{build_by}}" \
        --iso-volume "VyOS" \
        --debootstrap-options "--variant=minbase --exclude=isc-dhcp-client,isc-dhcp-common,ifupdown --include=apt-utils,ca-certificates,gnupg2" \
        --mirror-bootstrap {{debian_mirror}} \
        --mirror-chroot {{debian_mirror}} \
        --mirror-chroot-security {{debian_security_mirror}} \
        --mirror-binary {{debian_mirror}} \
        --mirror-binary-security {{debian_security_mirror}} \
        --archive-areas "main contrib non-free" \
        --firmware-chroot false \
        --firmware-binary false \
        --updates true \
        --security true \
        --backports true \
        --apt-recommends false \
        --apt-options "--yes -oAPT::Default-Release="current" -oAPT::Get::allow-downgrades=true" \
        --apt-indices false
        "${@}"
"""

with open(defaults.BUILD_CONFIG, 'r') as f:
     build_config = json.load(f)

debug = build_config['debug']

# Add the additional repositories to package lists
print("Setting up additional APT entries")
vyos_repo_entry = "deb {0} {1} main\n".format(build_config['vyos_mirror'], build_config['vyos_branch'])

apt_file = os.path.join(build_config['build_dir'], defaults.VYOS_REPO_FILE)

if debug:
    print("Adding these entries to {0}:".format(apt_file))
    print("\t", vyos_repo_entry)

with open(apt_file, 'w') as f:
    f.write(vyos_repo_entry)

# Add custom APT entries
if build_config['custom_apt_entry']:
    custom_apt_file = os.path.join(build_config['build_dir'], defaults.CUSTOM_REPO_FILE)
    entries = "\n".join(build_config['custom_apt_entry'])
    if debug:
        print("Adding custom APT entries:")
        print(entries)
    with open(custom_apt_file, 'w') as f:
        f.write(entries)
        f.write("\n")

# Add custom APT keys
if build_config['custom_apt_key']:
    key_dir = os.path.join(build_config['build_dir'], defaults.ARCHIVES_DIR)
    for k in build_config['custom_apt_key']:
        dst_name = '{0}.key.chroot'.format(os.path.basename(k))
        shutil.copy(k, os.path.join(key_dir, dst_name))

# Add custom packages
if build_config['custom_package']:
    package_list_file = os.path.join(build_config['build_dir'], defaults.CUSTOM_PACKAGE_LIST_FILE)
    packages = "\n".join(build_config['custom_package'])
    with open (package_list_file, 'w') as f:
        f.write(packages)

# Configure live-build

lb_config_command = pystache.render(lb_config_tmpl, build_config)

print("Configuring live-build")

os.chdir(defaults.BUILD_DIR)
result = os.system(lb_config_command)
if result > 0:
    print("live-build config failed")
    sys.exit(1)