#!/usr/bin/python
# Because we want to avoid a circular build dependency
# between glib and gobject-introspection, this script
# extracts the headers and documentation comments from
# the GLib source tree, which we then commit.
#
# Run this script whenever GLib, GObject, Gio public API changes.
# Example:
#   ./update-glib-sources code gio /src/checkout/glib > gio-2.0.c
#
# Copyright (C) 2010 Red Hat, Inc.
# Written by Colin Walters <walters@verbum.org>
#
# 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.

import os
import sys
import optparse
import glob

def usage(ecode):
    print "Usage: %s MODE MODULE /path/to/glib/source" % (sys.argv[0], )
    print "  MODE is one of \"headers\" or \"code\""
    print "  MODULE is one of \"glib\" \"gobject\" \"gio\""
    print "Example: %s headers gobject" % (sys.argv[0], )
    sys.exit(ecode)

def main():
    cwd = os.getcwd()
    if not os.path.basename(cwd) == 'gir':
        print "Must be run from gir/ directory"
        sys.exit(1)
    parser = optparse.OptionParser("%prog MODE MODULE")
    if len(sys.argv) != 4:
        usage(1)
    mode = sys.argv[1]
    if mode not in ['headers', 'code']:
        usage(1)
    module = sys.argv[2]
    if module not in ['glib', 'gobject', 'gio']:
        usage(1)
    glibdir = sys.argv[3]
    if not os.path.isfile(os.path.join(glibdir, 'glib-2.0.pc.in')):
        print "\"%s\" doesn't look like a compiled GLib source tree" % (glibdir, )
        sys.exit(1)
    flags = None
    srcdir = None
    if module == 'gio':
        flags = ['-DGIO_COMPILATION',
                 '-I' + glibdir]
        for path in ['glib', 'gobject', 'gmodule', 'gio']:
            flags.append('-I' + os.path.join(glibdir, path))
        srcdir = os.path.join(glibdir, 'gio')
    elif module == 'gobject':
        flags = ['-DGOBJECT_COMPILATION',
                 '-I' + glibdir]
        for path in ['glib', 'gobject', 'gmodule']:
            flags.append('-I' + os.path.join(glibdir, path))
        srcdir = os.path.join(glibdir, 'gobject')
    elif module == 'glib':
        flags = ['-DGLIB_COMPILATION',
                 '-I' + glibdir]
        for path in ['glib', 'gmodule']:
            flags.append('-I' + os.path.join(glibdir, path))
        srcdir = os.path.join(glibdir, 'glib')
    else:
        assert False, "Should not be reached"

    if not srcdir.endswith('/'):
        srcdir = srcdir + '/'

    if mode == 'code':
        args = ['../g-ir-annotation-tool', '-e']
        args.extend(flags)
        files = glob.glob(srcdir + '*.[ch]')
        files.sort()
        args.extend()
        sys.stderr.write("Running %r\n" % (args, ))
        sys.stderr.flush()
        os.environ['UNINSTALLED_INTROSPECTION_SRCDIR'] = os.path.dirname(os.getcwd())
        os.execvp(args[0], args)
    elif mode == 'headers':
        headers = glob.glob(srcdir + '*.h')
        headers.sort()
        for header_filename in headers:
            f = open(header_filename)
            for line in f:
                # All headers are in this single file
                if line.startswith('#include <gio/'):
                    continue
                sys.stdout.write(line)
            f.close()
    else:
        assert False, "Should not be reached"

    sys.exit(1)

if __name__ == '__main__':
    main()