python: docs processing

* Added some EPUB specific config options to the Sphinx config file
  which might help reduce some of Sphinx's more stupid default errors
  with EPUB validation.
* Added lang/python/post_installer.py script for automating the
  generation of .texi and .rst "source" files from the real source
  files written in Org mode.  Includes recreating the Sphinx Makefile
  which is excluded due to the m4 toolchain in parent directories, it
  also handles the rewriting of the reST index file properly and
  rewrites the .texi files so they don't impale themselves on Unicode.

Tested-by: Ben McGinnes <ben@adversary.org>
Signed-off-by: Ben McGinnes <ben@adversary.org>

lang/python/doc/rst/conf.py

@@ -15,6 +15,8 @@
 # import os
 # import sys
 # sys.path.insert(0, os.path.abspath('.'))
+import hashlib
+import time
 
 
 # -- Project information -----------------------------------------------------
@@ -101,7 +103,7 @@ html_static_path = ['_static']
 # -- Options for HTMLHelp output ---------------------------------------------
 
 # Output file base name for HTML help builder.
-htmlhelp_basename = 'GPGMEPythonBindingsdoc'
+htmlhelp_basename = 'GPGMEPythonBindings'
 
 
 # -- Options for LaTeX output ------------------------------------------------
@@ -114,6 +116,7 @@ latex_elements = {
     # The font size ('10pt', '11pt' or '12pt').
     #
     # 'pointsize': '10pt',
+    'pointsize': '12pt'
 
     # Additional stuff for the LaTeX preamble.
     #
@@ -128,7 +131,8 @@ latex_elements = {
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
 latex_documents = [
-    (master_doc, 'GPGMEPythonBindings.tex', 'GPGME Python Bindings Documentation',
+    (master_doc, 'GPGMEPythonBindings.tex',
+     'GPGME Python Bindings Documentation',
      'The GnuPG Hackers', 'manual'),
 ]
 
@@ -150,8 +154,8 @@ man_pages = [
 #  dir menu entry, description, category)
 texinfo_documents = [
     (master_doc, 'GPGMEPythonBindings', 'GPGME Python Bindings Documentation',
-     author, 'GPGMEPythonBindings', 'One line description of project.',
+     author, 'GPGMEPythonBindings',
-     'Miscellaneous'),
+     'Python Bindings to the GNU Privacy Guard API.', 'Miscellaneous'),
 ]
 
 
@@ -160,14 +164,21 @@ texinfo_documents = [
 # Bibliographic Dublin Core info.
 epub_title = project
 
-# The unique identifier of the text. This can be a ISBN number
+# The unique identifier of the text. This can be an ISBN number
 # or the project homepage.
 #
 # epub_identifier = ''
+epub_identifier = 'org.gnupg.gpgme.python'
 
 # A unique identification for the text.
 #
 # epub_uid = ''
+stt = str(time.time())
+epub_seed = "{0} {1}".format(epub_identifier, tt)
+# SHA1 would be more than fine for this, but since the dimmest always panic
+# about any use of SHA1 with GnuPG, we'll use SHA256.
+epub_hash = hashlib.sha256(epub_seed).hexdigest()
+epub_uid = 'sha256:{0}'.format(epub_hash)
 
 # A list of files that should not be packed into the epub file.
-epub_exclude_files = ['search.html']
+epub_exclude_files = ['search.html']

lang/python/post_installer.py

@@ -0,0 +1,158 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+# Copyright (C) 2016-2018 g10 Code GmbH
+# Copyright (C) 2015 Ben McGinnes <ben@adversary.org>
+#
+# This library 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.
+#
+# This library 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 this library; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+
+from __future__ import absolute_import, print_function, unicode_literals
+
+import glob
+import os
+import os.path
+import shutil
+import subprocess
+import sys
+import sysconfig
+
+from shutil import which
+
+del absolute_import, print_function, unicode_literals
+
+try:
+    emacs = os.path.realpath(which("emacs"))
+except TypeError as e:
+    emacs = None
+
+try:
+    makeinfo = os.path.realpath(which("makeinfo"))
+except TypeError as e:
+    makeinfo = None
+
+try:
+    pandoc = os.path.realpath(which("pandoc"))
+except TypeError as e:
+    pandoc = None
+
+try:
+    texinfo = os.path.realpath(which("texinfo"))
+except TypeError as e:
+    texinfo = None
+
+docsrc = glob.glob('doc/src/**/*', recursive=True)
+
+for srcdoc in docsrc:
+    process = subprocess.Popen([emacs, srcdoc, "--batch", "-f",
+                                "org-texinfo-export-to-texinfo", "--kill"],
+                                stdout=subprocess.PIPE)
+    procom = process.communicate()
+
+doctexi1 = glob.glob('doc/src/**/*.texi', recursive=True)
+doctexi2 = []
+doctexi3 = []
+
+for texi in doctexi1:
+    doctexi2.append(os.path.realpath(texi))
+
+for texdoc in doctexi2:
+    newtex = texdoc.replace("doc/src/", "doc/texinfo/")
+    doctexi3.append(newtex)
+    with open(texdoc, "r") as f:
+        badtex = f.read()
+    goodtex = badtex.replace("@documentencoding UTF-8\n",
+                             "@documentencoding utf-8\n")
+    with open(newtex, "w") as f:
+        f.write(goodtex)
+
+for srcdoc in docsrc:
+    rstdoc = "{0}.rst".format(srcdoc.replace("doc/src/", "doc/rst/"))
+    process = subprocess.Popen([pandoc, "-f", "org", "-t", "rst+smart", "-o",
+                                rstdoc, srcdoc], stdout=subprocess.PIPE)
+    procom = process.communicate()
+
+with open("doc/rst/index.rst", "r") as f:
+    genindex = f.readlines()
+
+indextop = ['.. GPGME Python Bindings documentation master file, created by\n',
+            '   sphinx-quickstart on Wed Dec  5 09:04:47 2018.\n',
+            '   You can adapt this file completely to your liking, but it should at least\n',
+            '   contain the root `toctree` directive.\n', '\n',
+            'GPGME Python Bindings\n', '=====================\n', '\n',
+            '.. toctree::\n', '   :maxdepth: 3\n', '   :caption: Contents:\n',
+            '\n']
+
+with open("doc/rst/index.rst", "w") as f:
+    for line in indextop:
+        f.write(line)
+    for line in genindex[5:]:
+        f.write(line)
+
+with open("doc/rst/Makefile", "w") as f:
+    f.write("""# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line.
+SPHINXOPTS    =
+SPHINXBUILD   = sphinx-build
+SOURCEDIR     = .
+BUILDDIR      = _build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+        @$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+        @$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+""")
+
+print("""
+You may now generate your preferred documentation format with either Sphinx 
+or Texinfo.
+""")
+
+info_path = os.path.realpath(sysconfig._PREFIX + "/share/info")
+info_paths = os.environ["INFOPATH"].split(":")
+
+if info_paths.count(info_path) == 0:
+    info_paths.insert(0, info_path)
+else:
+    pass
+
+for ipath in info_paths:
+    if os.path.exists(os.path.realpath(ipath)) is False:
+        info_paths.remove(ipath)
+    else:
+        pass
+
+# This will very likely require root or sudo access, so running this script
+# with the same access as used to install the bindings in the first place is
+# highly recommended.
+#
+# bash variant (run in lang/python/doc/texinfo/):
+#
+# for x in *.texi:
+#     makeinfo -v --no-split $x
+# done ;
+#
+# Or to generate HTML:
+#
+# for x in *.texi:
+#     makeinfo -v --no-split --html $x
+# done ;