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# Source code for sphinx.builders.texinfo

    # -*- coding: utf-8 -*-
    """
        sphinx.builders.texinfo
        ~~~~~~~~~~~~~~~~~~~~~~~

        Texinfo builder.

        :copyright: Copyright 2007-2016 by the Sphinx team, see AUTHORS.
        :license: BSD, see LICENSE for details.
    """

    from os import path

    from six import iteritems
    from docutils import nodes
    from docutils.io import FileOutput
    from docutils.utils import new_document
    from docutils.frontend import OptionParser

    from sphinx import addnodes
    from sphinx.locale import _
    from sphinx.builders import Builder
    from sphinx.environment import NoUri
    from sphinx.util.nodes import inline_all_toctrees
    from sphinx.util.osutil import SEP, copyfile
    from sphinx.util.console import bold, darkgreen
    from sphinx.writers.texinfo import TexinfoWriter

    TEXINFO_MAKEFILE = '''\
    # Makefile for Sphinx Texinfo output

    infodir ?= /usr/share/info

    MAKEINFO = makeinfo --no-split
    MAKEINFO_html = makeinfo --no-split --html
    MAKEINFO_plaintext = makeinfo --no-split --plaintext
    TEXI2PDF = texi2pdf --batch --expand
    INSTALL_INFO = install-info

    ALLDOCS = $(basename $(wildcard *.texi))

    all: info
    info: $(addsuffix .info,$(ALLDOCS))
    plaintext: $(addsuffix .txt,$(ALLDOCS))
    html: $(addsuffix .html,$(ALLDOCS))
    pdf: $(addsuffix .pdf,$(ALLDOCS))

    install-info: info
    \tfor f in *.info; do \\
    \t  cp -t $(infodir) "$$f" && \\
    \t  $(INSTALL_INFO) --info-dir=$(infodir) "$$f" ; \\
    \tdone

    uninstall-info: info
    \tfor f in *.info; do \\
    \t  rm -f "$(infodir)/$$f"  ; \\
    \t  $(INSTALL_INFO) --delete --info-dir=$(infodir) "$$f" ; \\
    \tdone

    %.info: %.texi
    \t$(MAKEINFO) -o '$@' '$<'

    %.txt: %.texi
    \t$(MAKEINFO_plaintext) -o '$@' '$<'

    %.html: %.texi
    \t$(MAKEINFO_html) -o '$@' '$<'

    %.pdf: %.texi
    \t-$(TEXI2PDF) '$<'
    \t-$(TEXI2PDF) '$<'
    \t-$(TEXI2PDF) '$<'

    clean:
    \trm -f *.info *.pdf *.txt *.html
    \trm -f *.log *.ind *.aux *.toc *.syn *.idx *.out *.ilg *.pla *.ky *.pg
    \trm -f *.vr *.tp *.fn *.fns *.def *.defs *.cp *.cps *.ge *.ges *.mo

    .PHONY: all info plaintext html pdf install-info uninstall-info clean
    '''

    class TexinfoBuilder(Builder):
        """
        Builds Texinfo output to create Info documentation.
        """
        name = 'texinfo'
        format = 'texinfo'
        supported_image_types = ['image/png', 'image/jpeg',
                                 'image/gif']

        def init(self):
            self.docnames = []
            self.document_data = []

        def get_outdated_docs(self):
            return 'all documents'  # for now

        def get_target_uri(self, docname, typ=None):
            if docname not in self.docnames:
                raise NoUri
            else:
                return '%' + docname

        def get_relative_uri(self, from_, to, typ=None):
            # ignore source path
            return self.get_target_uri(to, typ)

        def init_document_data(self):
            preliminary_document_data = [list(x) for x in self.config.texinfo_documents]
            if not preliminary_document_data:
                self.warn('no "texinfo_documents" config value found; no documents '
                          'will be written')
                return
            # assign subdirs to titles
            self.titles = []
            for entry in preliminary_document_data:
                docname = entry[0]
                if docname not in self.env.all_docs:
                    self.warn('"texinfo_documents" config value references unknown '
                              'document %s' % docname)
                    continue
                self.document_data.append(entry)
                if docname.endswith(SEP+'index'):
                    docname = docname[:-5]
                self.titles.append((docname, entry[2]))

        def write(self, *ignored):
            self.init_document_data()
            for entry in self.document_data:
                docname, targetname, title, author = entry[:4]
                targetname += '.texi'
                direntry = description = category = ''
                if len(entry) > 6:
                    direntry, description, category = entry[4:7]
                toctree_only = False
                if len(entry) > 7:
                    toctree_only = entry[7]
                destination = FileOutput(
                    destination_path=path.join(self.outdir, targetname),
                    encoding='utf-8')
                self.info("processing " + targetname + "... ", nonl=1)
                doctree = self.assemble_doctree(
                    docname, toctree_only,
                    appendices=(self.config.texinfo_appendices or []))
                self.info("writing... ", nonl=1)
                self.post_process_images(doctree)
                docwriter = TexinfoWriter(self)
                settings = OptionParser(
                    defaults=self.env.settings,
                    components=(docwriter,),
                    read_config_files=True).get_default_values()
                settings.author = author
                settings.title = title
                settings.texinfo_filename = targetname[:-5] + '.info'
                settings.texinfo_elements = self.config.texinfo_elements
                settings.texinfo_dir_entry = direntry or ''
                settings.texinfo_dir_category = category or ''
                settings.texinfo_dir_description = description or ''
                settings.docname = docname
                doctree.settings = settings
                docwriter.write(doctree, destination)
                self.info("done")

        def assemble_doctree(self, indexfile, toctree_only, appendices):
            self.docnames = set([indexfile] + appendices)
            self.info(darkgreen(indexfile) + " ", nonl=1)
            tree = self.env.get_doctree(indexfile)
            tree['docname'] = indexfile
            if toctree_only:
                # extract toctree nodes from the tree and put them in a
                # fresh document
                new_tree = new_document('<texinfo output>')
                new_sect = nodes.section()
                new_sect += nodes.title(u'<Set title in conf.py>',
                                        u'<Set title in conf.py>')
                new_tree += new_sect
                for node in tree.traverse(addnodes.toctree):
                    new_sect += node
                tree = new_tree
            largetree = inline_all_toctrees(self, self.docnames, indexfile, tree,
                                            darkgreen, [indexfile])
            largetree['docname'] = indexfile
            for docname in appendices:
                appendix = self.env.get_doctree(docname)
                appendix['docname'] = docname
                largetree.append(appendix)
            self.info()
            self.info("resolving references...")
            self.env.resolve_references(largetree, indexfile, self)
            # TODO: add support for external :ref:s
            for pendingnode in largetree.traverse(addnodes.pending_xref):
                docname = pendingnode['refdocname']
                sectname = pendingnode['refsectname']
                newnodes = [nodes.emphasis(sectname, sectname)]
                for subdir, title in self.titles:
                    if docname.startswith(subdir):
                        newnodes.append(nodes.Text(_(' (in '), _(' (in ')))
                        newnodes.append(nodes.emphasis(title, title))
                        newnodes.append(nodes.Text(')', ')'))
                        break
                else:
                    pass
                pendingnode.replace_self(newnodes)
            return largetree

        def finish(self):
            # copy image files
            if self.images:
                self.info(bold('copying images...'), nonl=1)
                for src, dest in iteritems(self.images):
                    self.info(' '+src, nonl=1)
                    copyfile(path.join(self.srcdir, src),
                             path.join(self.outdir, dest))
                self.info()

            self.info(bold('copying Texinfo support files... '), nonl=True)
            # copy Makefile
            fn = path.join(self.outdir, 'Makefile')
            self.info(fn, nonl=1)
            try:
                mkfile = open(fn, 'w')
                try:
                    mkfile.write(TEXINFO_MAKEFILE)
                finally:
                    mkfile.close()
            except (IOError, OSError) as err:
                self.warn("error writing file %s: %s" % (fn, err))
            self.info(' done')