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#!/usr/bin/env python3
# Copyright 2016  QvarnLabs Ab
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU 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 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/>.
#
# =*= License: GPL-3+ =*=


import os
import shutil
import subprocess
import sys
import tempfile
import fnmatch
import re


def preprocess(srcdir, tgtdir):
    argv = [
        'ql-ikiwiki-preprocess',
        srcdir,
        tgtdir,
    ]
    subprocess.check_call(argv)


def wanted(line):
    prefixes = ['srcdir:', 'destdir:']
    for prefix in prefixes:
        if line.startswith(prefix):
            return False
    return True


def mangle_setup(setup, tgtdir, htmldir):
    with open(setup) as f:
        text = f.read()

    lines = [
        line
        for line in text.splitlines()
        if wanted(line)
    ]

    lines.append('srcdir: {}'.format(tgtdir))
    lines.append('destdir: {}'.format(htmldir))

    mangled = ''.join(line + '\n' for line in lines)
    with open(setup, 'w') as f:
        f.write(mangled)


def run_ikiwiki(setup):
    argv = ['ikiwiki', '--setup', setup]
    subprocess.check_call(argv)


def run_rsync(htmldir, target):
    argv = ['rsync', '-a', '--delete', htmldir + '/.', target + '/.']
    subprocess.check_call(argv)


srcdir = sys.argv[1]
rsync_target = sys.argv[2]

tempdir = tempfile.mkdtemp()
tgtdir = os.path.join(tempdir, 'tgt')
htmldir = os.path.join(tempdir, 'html')
setup = os.path.join(tgtdir, 'ikiwiki.setup')

preprocess(srcdir, tgtdir)
mangle_setup(setup, tgtdir, htmldir)
run_ikiwiki(setup)
run_rsync(htmldir, rsync_target)