summaryrefslogtreecommitdiff
path: root/make-directive-index.py
blob: e94f4c5b30e2cc2d4e4686523e47b14a282ad1bc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
#  -*- Mode: python; coding: utf-8; indent-tabs-mode: nil -*- */
#
#  This file is part of systemd.
#
#  Copyright 2012 Zbigniew Jędrzejewski-Szmek
#
#  systemd is free software; you can redistribute it and/or modify it
#  under the terms of the GNU Lesser General Public License as published by
#  the Free Software Foundation; either version 2.1 of the License, or
#  (at your option) any later version.
#
#  systemd 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
#  Lesser General Public License for more details.
#
#  You should have received a copy of the GNU Lesser General Public License
#  along with systemd; If not, see <http://www.gnu.org/licenses/>.

import sys
import collections
import xml.etree.ElementTree as tree

TEMPLATE = '''\
<refentry id="systemd.directives">

        <refentryinfo>
                <title>systemd.directives</title>
                <productname>systemd</productname>

                <authorgroup>
                        <author>
                                <contrib>Developer</contrib>
                                <firstname>Zbigniew</firstname>
                                <surname>Jędrzejewski-Szmek</surname>
                                <email>zbyszek@in.waw.pl</email>
                        </author>
                </authorgroup>
        </refentryinfo>

        <refmeta>
                <refentrytitle>systemd.directives</refentrytitle>
                <manvolnum>5</manvolnum>
        </refmeta>

        <refnamediv>
                <refname>systemd.directives</refname>
                <refpurpose>Index of configuration directives</refpurpose>
        </refnamediv>

        <refsect1>
                <title>Unit directives</title>

                <para>Directives for configuring units, used in unit
                files.</para>

                <variablelist id='unit-directives' />
        </refsect1>

        <refsect1>
                <title>System manager directives</title>

                <para>Directives for configuring the behaviour of the
                systemd process.</para>

                <variablelist id='systemd-directives' />
        </refsect1>

        <refsect1>
                <title>Options on the kernel command line</title>

                <para>Kernel boot options for configuring the behaviour of the
                systemd process.</para>

                <variablelist id='kernel-commandline-directives' />
        </refsect1>

        <refsect1>
                <title>Environment variables</title>

                <para>Environment variables understood by the systemd process.</para>

                <variablelist id='environment-variables' />
        </refsect1>

        <refsect1>
                <title>UDEV directives</title>

                <para>Directives for configuring systemd units through the
                udev database.</para>

                <variablelist id='udev-directives' />
        </refsect1>

        <refsect1>
                <title>Journal directives</title>

                <para>Directives for configuring the behaviour of the
                journald process.</para>

                <variablelist id='journal-directives' />
        </refsect1>

        <refsect1>
                <title>bootchart.conf directives</title>

                <para>Directives for configuring the behaviour of the
                systemd-bootchart process.</para>

                <variablelist id='bootchart-directives' />
        </refsect1>

        <refsect1>
                <title>Colophon</title>
                <para id='colophon' />
        </refsect1>
</refentry>
'''

COLOPHON = '''\
This index contains {count} entries in {sections} sections,
referring to {pages} individual manual pages.
'''

def _extract_directives(directive_groups, page):
    t = tree.parse(page)
    section = t.find('./refmeta/manvolnum').text
    pagename = t.find('./refmeta/refentrytitle').text
    for variablelist in t.iterfind('.//variablelist'):
        klass = variablelist.attrib.get('class') or 'unit-directives'
        stor = directive_groups[klass]
        for varname in variablelist.iterfind('./varlistentry/term/varname'):
            text = ''.join(varname.text.partition('=')[:2])
            stor[text].append((pagename, section))

def _make_section(template, name, directives):
    varlist = template.find(".//*[@id='{}']".format(name))
    for varname, manpages in sorted(directives.items()):
        entry = tree.SubElement(varlist, 'varlistentry')
        a = tree.SubElement(tree.SubElement(entry, 'term'), 'varname')
        a.text = varname
        para = tree.SubElement(tree.SubElement(entry, 'listitem'), 'para')

        b = None
        for manpage, manvolume in sorted(manpages):
                if b is not None:
                        b.tail = ', '
                b = tree.SubElement(para, 'citerefentry')
                c = tree.SubElement(b, 'refentrytitle')
                c.text = manpage
                d = tree.SubElement(b, 'manvolnum')
                d.text = manvolume
        entry.tail = '\n\n'

def _make_colophon(template, groups):
    count = 0
    pages = set()
    for group in groups:
        count += len(group)
        for pagelist in group.values():
            pages |= set(pagelist)

    para = template.find(".//para[@id='colophon']")
    para.text = COLOPHON.format(count=count,
                                sections=len(groups),
                                pages=len(pages))

def _make_page(template, directive_groups):
    """Create an XML tree from directive_groups.

    directive_groups = {
       'class': {'variable': [('manpage', 'manvolume'), ...],
                 'variable2': ...},
       ...
    }
    """
    for name, directives in directive_groups.items():
            _make_section(template, name, directives)

    _make_colophon(template, directive_groups.values())

    return template

def make_page(xml_files):
    "Extract directives from xml_files and return XML index tree."
    template = tree.fromstring(TEMPLATE)
    names = [vl.get('id') for vl in template.iterfind('.//variablelist')]
    directive_groups = {name:collections.defaultdict(list)
                        for name in names}
    for page in xml_files:
        _extract_directives(directive_groups, page)

    return _make_page(template, directive_groups)

if __name__ == '__main__':
    tree.dump(make_page(sys.argv[1:]))