--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pygnulib/generator.py	Sat Sep 02 20:51:27 2017 +0300
@@ -0,0 +1,253 @@
+#!/usr/bin/python
+# encoding: UTF-8
+
+
+
+import os
+
+from .config import Config
+from .module import Module
+
+
+
+class Generator:
+    """gnulib file content generator"""
+    _TEMPLATE_ = (
+        "## DO NOT EDIT! GENERATED AUTOMATICALLY!",
+        "#",
+        "# This file is free software; you can redistribute it and/or modify",
+        "# it under the terms of the GNU General Public License as published by",
+        "# the Free Software Foundation; either version 3 of the License, or",
+        "# (at your option) any later version.",
+        "#",
+        "# This file 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 General Public License for more details.",
+        "#",
+        "# You should have received a copy of the GNU General Public License",
+        "# along with this file.  If not, see <http://www.gnu.org/licenses/>.",
+        "#",
+        "# As a special exception to the GNU General Public License,",
+        "# this file may be distributed as part of a program that",
+        "# contains a configuration script generated by Autoconf, under",
+        "# the same distribution terms as the rest of that program.",
+        "#",
+        "# Generated by gnulib-tool.",
+    )
+
+    def __repr__(self):
+        return "pygnulib.generator.Generator"
+
+    def __str__(self):
+        return "\n".join([_ for _ in self])
+
+    def __iter__(self):
+        for line in Generator._TEMPLATE_:
+            yield line
+
+
+
+class POMakefile(Generator):
+    """PO Makefile parameterization"""
+    _TEMPLATE_ = (
+        "# These options get passed to xgettext.",
+        "XGETTEXT_OPTIONS = \\",
+        "  --keyword=_ --flag=_:1:pass-c-format \\",
+        "  --keyword=N_ --flag=N_:1:pass-c-format \\",
+        "  --keyword='proper_name:1,\"This is a proper name." # comma omitted
+        " See the gettext manual, section Names.\"' \\",
+        "  --keyword='proper_name_utf8:1,\"This is a proper name." # comma omitted
+        " See the gettext manual, section Names.\"' \\",
+        "  --flag=error:3:c-format --flag=error_at_line:5:c-format",
+        "",
+        "# This is the copyright holder that gets inserted into the header of the",
+        "# $(DOMAIN).pot file.  gnulib is copyrighted by the FSF.",
+        "COPYRIGHT_HOLDER = Free Software Foundation, Inc.",
+        "",
+        "# This is the email address or URL to which the translators shall report",
+        "# bugs in the untranslated strings:",
+        "# - Strings which are not entire sentences, see the maintainer guidelines",
+        "#   in the GNU gettext documentation, section 'Preparing Strings'.",
+        "# - Strings which use unclear terms or require additional context to be",
+        "#   understood.",
+        "# - Strings which make invalid assumptions about notation of date, time or",
+        "#   money.",
+        "# - Pluralisation problems.",
+        "# - Incorrect English spelling.",
+        "# - Incorrect formatting.",
+        "# It can be your email address, or a mailing list address where translators",
+        "# can write to without being subscribed, or the URL of a web page through",
+        "# which the translators can contact you.",
+        "MSGID_BUGS_ADDRESS = bug-gnulib@gnu.org",
+        "",
+        "# This is the list of locale categories, beyond LC_MESSAGES, for which the",
+        "# message catalogs shall be used.  It is usually empty.",
+        "EXTRA_LOCALE_CATEGORIES =",
+        "",
+        "# This tells whether the $(DOMAIN).pot file contains messages with an 'msgctxt'",
+        "# context.  Possible values are \"yes\" and \"no\".  Set this to yes if the",
+        "# package uses functions taking also a message context, like pgettext(), or",
+        "# if in $(XGETTEXT_OPTIONS) you define keywords with a context argument.",
+        "USE_MSGCTXT = no"
+    )
+    def __init__(self, config):
+        if not isinstance(config, Config):
+            raise TypeError("config must be of pygnulib.Config type")
+        self._config_ = config
+        super().__init__()
+
+
+    @property
+    def po_base(self):
+        """directory relative to ROOT where *.po files are placed; defaults to 'po'"""
+        return self._config_.po_base
+
+
+    @property
+    def po_domain(self):
+        """the prefix of the i18n domain"""
+        return self._config_.po_domain
+
+
+    def __repr__(self):
+        fmt = "pygnulib.generator.POMakefile(po_base=%r, po_domain=%r)"
+        return fmt % (self.po_base, self.po_domain)
+
+
+    def __iter__(self):
+        for line in super().__iter__():
+            yield line
+        yield "# Usually the message domain is the same as the package name."
+        yield "# But here it has a '-gnulib' suffix."
+        yield "DOMAIN = %s-gnulib" % self.po_domain
+        yield ""
+        yield "# These two variables depend on the location of this directory."
+        yield "subdir = %s" % self.po_domain
+        yield "top_subdir = %s" % "/".join([".." for _ in self.po_base.split(os.path.sep)])
+        for line in POMakefile._TEMPLATE_:
+            yield line
+
+
+
+class POTFILES(Generator):
+    """File list to be passed to xgettext"""
+    def __init__(self, config, files):
+        if not isinstance(config, Config):
+            raise TypeError("config must be of pygnulib.Config type")
+        super().__init__()
+        self._config_ = config
+        self._files_ = tuple(files)
+
+
+    @property
+    def source_base(self):
+        """directory relative to ROOT where source code is placed; defaults to 'lib'"""
+        return self._config_.source_base
+
+
+    @property
+    def files(self):
+        """list of files"""
+        return tuple(self.files)
+
+
+    def __repr__(self):
+        fmt = "pygnulib.generator.POTFILES(source_base=%r, files=%r)"
+        return fmt % (self.source_base, self.files)
+
+
+    def __iter__(self):
+        for line in super().__iter__():
+            yield line
+        yield "# List of files which contain translatable strings."
+        for file in [_ for _ in self.files if _.startswith("lib/")]:
+            yield os.path.join(self.source_base, file[4:])
+
+
+
+class AutoconfSnippet(Generator):
+    """autoconf snippet generator for standalone module"""
+    def __init__(self, config, module, toplevel, no_libtool, no_gettext):
+        """
+        config: gnulib configuration
+        module: gnulib module instance
+        toplevel: make a subordinate use of gnulib if False
+        no_libtool: disable libtool (regardless of configuration)
+        no_gettext: disable AM_GNU_GETTEXT invocations if True
+        """
+        if not isinstance(config, Config):
+            raise TypeError("config must be of pygnulib.config.Config type")
+        if not isinstance(module, Module):
+            raise TypeError("module must be of pygnulib.module.Module type")
+        if not isinstance(toplevel, bool):
+            raise TypeError("toplevel must be of bool type")
+        if not isinstance(no_libtool, bool):
+            raise TypeError("no_libtool must be of bool type")
+        if not isinstance(no_gettext, bool):
+            raise TypeError("no_gettext must be of bool type")
+        super().__init__()
+        self._config_ = config
+        self._module_ = module
+        self._toplevel_ = toplevel
+        self._no_libtool_ = no_libtool
+        self._no_gettext_ = no_gettext
+
+
+    @property
+    def toplevel(self):
+        """top level indicator; subordinate use of pygnulib"""
+        return self._toplevel_
+
+
+    @property
+    def libtool(self):
+        """libtool switch, disabling libtool configuration parameter"""
+        return self._config_.libtool and not self._no_libtool_
+
+
+    @property
+    def gettext(self):
+        """gettext switch, disabling AM_GNU_GETTEXT invocations"""
+        return not self._no_gettext_
+
+
+    def __repr__(self):
+        flags = []
+        if self.toplevel:
+            flags += ["toplevel"]
+        if self.libtool:
+            flags += ["libtool"]
+        if self.gettext:
+            flags += ["gettext"]
+        fmt = "pygnulib.generator.AutoconfSnippet(include_guard_prefix=%r, flags=%s)"
+        include_guard_prefix = self._config_.include_guard_prefix
+        return fmt % (include_guard_prefix, "|".join(flags))
+
+
+    def __iter__(self):
+        module = self._module_
+        if module.name not in ("gnumakefile", "maintainer-makefile") or self.toplevel:
+            snippet = module.configure_ac_snippet
+            include_guard_prefix = self._config_.include_guard_prefix
+            snippet.replace(r"${gl_include_guard_prefix}", include_guard_prefix)
+            if not self.libtool:
+                table = (
+                    (r"$gl_cond_libtool", "false"),
+                    ("gl_libdeps", "gltests_libdeps"),
+                    ("gl_ltlibdeps", "gltests_ltlibdeps"),
+                )
+                for (src, dst) in table:
+                    snippet = snippet.replace(src, dst)
+            if not self.gettext:
+                src = "AM_GNU_GETTEXT([external])"
+                dst = "dnl you must add AM_GNU_GETTEXT([external]) or similar to configure.ac.'"
+                snippet = snippet.replace(src, dst)
+            lines = (_ for _ in snippet.split("\n") if _)
+            for line in lines:
+                yield line
+            if module.name == "alloca" and self.libtool:
+                yield "changequote(,)dnl"
+                yield "LTALLOCA=`echo \"$ALLOCA\" | sed -e 's/\\.[^.]* /.lo /g;s/\\.[^.]*$/.lo/'`"
+                yield "changequote([, ])dnl"
+                yield "AC_SUBST([LTALLOCA])"