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# SPDX-License-Identifier: LGPL-2.1-or-later

# This is lame, I know, but meson has no other include mechanism
subdir('rules')

want_man = get_option('man')
want_html = get_option('html')
xsltproc = find_program('xsltproc',
                        required : want_man.enabled() or want_html.enabled())
want_man = want_man.allowed() and xsltproc.found()
want_html = want_html.allowed() and xsltproc.found()

xsltproc_flags = [
        '--nonet',
        '--xinclude',
        '--maxdepth', '9000',
        '--stringparam', 'man.output.quietly', '1',
        '--stringparam', 'funcsynopsis.style', 'ansi',
        '--stringparam', 'man.authors.section.enabled', '0',
        '--stringparam', 'man.copyright.section.enabled', '0',
        '--stringparam', 'systemd.version', '@0@'.format(meson.project_version()),
        '--path',
        '@0@:@1@:@2@'.format(meson.current_build_dir(),
                             meson.current_source_dir(),
                             libshared_build_dir)]

custom_man_xsl = files('custom-man.xsl')
custom_html_xsl = files('custom-html.xsl')
xslt_cmd = [xsltproc, '-o', '@OUTPUT0@'] + xsltproc_flags

custom_entities_ent = custom_target(
        'custom-entities.ent',
        input : 'custom-entities.ent.in',
        output : 'custom-entities.ent',
        command : [jinja2_cmdline, '@INPUT@', '@OUTPUT@'])

man_page_depends += custom_entities_ent

man_pages = []
html_pages = []
source_xml_files = []
dbus_docs = []
foreach tuple : manpages
        stem = tuple[0]
        section = tuple[1]
        aliases = tuple[2]
        condition = tuple[3]

        xml = stem + '.xml'
        html = stem + '.html'
        man = stem + '.' + section

        manaliases = []
        htmlaliases = []
        foreach alias : aliases
                manaliases += alias + '.' + section
                htmlaliases += alias + '.html'
        endforeach

        mandirn = get_option('mandir') / ('man' + section)

        if condition == '' or conf.get(condition) == 1
                file = files(tuple[0] + '.xml')
                source_xml_files += file
                if tuple[0].startswith('org.freedesktop.')
                        dbus_docs += file
                endif

                if xsltproc.found()
                        p1 = custom_target(
                                man,
                                input : xml,
                                output : [man] + manaliases,
                                command : xslt_cmd + [custom_man_xsl, '@INPUT@'],
                                depends : man_page_depends,
                                install : want_man,
                                install_dir : mandirn)
                        man_pages += p1

                        p2 = []
                        foreach htmlalias : htmlaliases
                                link = custom_target(
                                        htmlalias,
                                        output : htmlalias,
                                        command : [ln, '-fs', html, '@OUTPUT@'])
                                if want_html
                                        meson.add_install_script(sh, '-c', ln_s.format(docdir / 'html' / html, docdir / 'html' / htmlalias))
                                        p2 += link
                                endif
                                html_pages += link
                        endforeach

                        p3 = custom_target(
                                html,
                                input : xml,
                                output : html,
                                command : xslt_cmd + [custom_html_xsl, '@INPUT@'],
                                depends : [man_page_depends, p2],
                                install : want_html,
                                install_dir : docdir / 'html')
                        html_pages += p3
                endif
        else
                message('Skipping @0@.@1@ because @2@ is false'.format(stem, section, condition))
        endif
endforeach

############################################################

have_lxml = run_command(xml_helper_py, check: false).returncode() == 0
if not have_lxml
        message('python-lxml not available, not making man page indices')
endif

systemd_directives_xml = custom_target(
        'systemd.directives.xml',
        input : ['directives-template.xml', source_xml_files],
        output : 'systemd.directives.xml',
        depends : man_page_depends,
        command : [make_directive_index_py, '@OUTPUT@', '@INPUT@'])

nonindex_xml_files = source_xml_files + [systemd_directives_xml]
systemd_index_xml = custom_target(
        'systemd.index.xml',
        input : nonindex_xml_files,
        output : 'systemd.index.xml',
        command : [make_man_index_py, '@OUTPUT@'] + nonindex_xml_files)

foreach tuple : xsltproc.found() ? [['systemd.directives', '7', systemd_directives_xml],
                                    ['systemd.index',      '7', systemd_index_xml]] : []
        stem = tuple[0]
        section = tuple[1]
        xml = tuple[2]

        html = stem + '.html'
        man = stem + '.' + section

        mandirn = get_option('mandir') / ('man' + section)

        p1 = custom_target(
                man,
                input : xml,
                output : man,
                command : xslt_cmd + [custom_man_xsl, '@INPUT@'],
                install : want_man and have_lxml,
                install_dir : mandirn)
        man_pages += p1

        p2 = []
        if html == 'systemd.index.html'
                htmlalias = 'index.html'
                link = custom_target(
                        htmlalias,
                        input : p2,
                        output : htmlalias,
                        command : [ln, '-fs', html, '@OUTPUT@'])
                if want_html
                        meson.add_install_script(sh, '-c', ln_s.format(docdir / 'html' / html, docdir / 'html' / htmlalias))
                        p2 += link
                endif
                html_pages += link
        endif

        p3 = custom_target(
                html,
                input : xml,
                output : html,
                command : xslt_cmd + [custom_html_xsl, '@INPUT@'],
                depends : [man_page_depends, p2],
                install : want_html and have_lxml,
                install_dir : docdir / 'html')
        html_pages += p3
endforeach

# Cannot use run_target because those targets are used in depends
# Also see https://github.com/mesonbuild/meson/issues/368.
man = custom_target(
        'man',
        output : 'man',
        depends : man_pages,
        command : [echo])

html = custom_target(
        'html',
        output : 'html',
        depends : html_pages,
        command : [echo])

if rsync.found()
        run_target(
                'doc-sync',
                depends : man_pages + html_pages,
                command : [sync_docs_py,
                           '--version',
                           '@0@'.format(meson.project_version()),
                           meson.current_build_dir(),
                           get_option('www-target')])
endif

############################################################

buildroot_substs = configuration_data()
buildroot_substs.set_quoted('BUILD_ROOT', project_build_root)

configure_file(
        input : 'man.in',
        output : 'man',
        configuration : buildroot_substs)

configure_file(
        input : 'html.in',
        output : 'html',
        configuration : buildroot_substs)

############################################################

update_dbus_docs = custom_target(
        'update-dbus-docs-impl',
        output : 'update-dbus-docs',
        command : [update_dbus_docs_py, '--build-dir', project_build_root, '@INPUT@'],
        input : dbus_docs)

if conf.get('BUILD_MODE_DEVELOPER') == 1
        test('dbus-docs-fresh',
             update_dbus_docs_py,
             suite : 'dist',
             args : ['--build-dir', project_build_root, '--test', dbus_docs],
             depends : dbus_programs)

        test('check-version-history',
             check_version_history_py,
             suite : 'dist',
             args : source_xml_files)
endif

update_man_rules = custom_target(
        'update-man-rules-impl',
        output : 'update-man-rules',
        command : [update_man_rules_py,
                   '@0@/man/*.xml'.format(project_source_root),
                   '@0@/rules/meson.build'.format(meson.current_source_dir())],
        depends : man_page_depends)