# vim: set et sw=3 tw=0 fo=awqorc ft=python:
#
# Astxx, the Asterisk C++ API and Utility Library.
# Copyright (C) 2005, 2006  Matthew A. Nicholson
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License version 2.1 as published by the Free Software Foundation.
#
# 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

import os
import glob

def DoxyfileParse(file_contents):
   """
   Parse a Doxygen source file and return a dictionary of all the values.
   Values will be strings and lists of strings.
   """
   data = {}

   import shlex
   lex = shlex.shlex(instream = file_contents, posix = True)
   lex.wordchars += "./-"
   lex.whitespace = lex.whitespace.replace("\n", "")
   lex.escape = ""

   lineno = lex.lineno
   token = lex.get_token()
   key = token   # the first token should be a key
   last_token = ""
   key_token = False
   next_key = False

   while token:
      if token in ['\n']:
         if last_token not in ['\\']:
            key_token = True
      elif token in ['\\']:
         pass
      elif key_token:
         key = token
         key_token = False
      else:
         if token == "+=":
            if not data.has_key(key):
               data[key] = list()
         elif token == "=":
            data[key] = list()
         else:
            data[key].append(token)

      last_token = token
      token = lex.get_token()

   # compress lists of len 1 into single strings
   for (k, v) in data.items():
      if len(v) == 0:
         data.pop(k)

      if k in ["INPUT", "FILE_PATTERNS"]:
         continue

      if len(v) == 1:
         data[k] = v[0]

   return data

def DoxySourceScan(node, env, path):
   """
   Doxygen Doxyfile source scanner.  This should scan the Doxygen file and add
   any files used to generate docs to the list of source files.
   """
   default_file_patterns = [
      '*.c', '*.cc', '*.cxx', '*.cpp', '*.c++', '*.java', '*.ii', '*.ixx',
      '*.ipp', '*.i++', '*.inl', '*.h', '*.hh ', '*.hxx', '*.hpp', '*.h++',
      '*.idl', '*.odl', '*.cs', '*.php', '*.php3', '*.inc', '*.m', '*.mm',
      '*.py',
   ]

   sources = []

   data = DoxyfileParse(node.get_contents())

   if data.get("RECURSIVE", "NO") == "YES":
      recursive = True
   else:
      recursive = False

   file_patterns = data.get("FILE_PATTERNS", default_file_patterns)

   def recursively_scan_dir(dir, file_patterns):
      matches = []
      if not os.path.isdir(dir):
         return matches

      for pattern in file_patterns:
         matches.extend(glob.glob("/".join([dir, pattern])))

      for node in os.listdir(dir):
         path = "/".join([dir, node])
         if os.path.isdir(path):
            matches.extend(recursively_scan_dir(path, file_patterns))

      return matches

   for node in data.get("INPUT", []):
      if os.path.isfile(node):
         sources.add(node)
      elif os.path.isdir(node):
         if recursive:
            sources.extend(recursively_scan_dir(node, file_patterns))
         else:
            for pattern in file_patterns:
               sources.extend(glob.glob("/".join([node, pattern])))

   return sources

def DoxySourceScanCheck(node, env):
   """Check if we should scan this file"""
   return os.path.isfile(node.path)

def DoxyEmitter(source, target, env):
   """Doxygen Doxyfile emitter"""
   # possible output formats and their default values and output locations
   output_formats = {
      "HTML": ("YES", "html"),
      "LATEX": ("NO", "latex"),
      "RTF": ("NO", "rtf"),
      "MAN": ("NO", "man"),
      "XML": ("NO", "xml"),
   }

   data = DoxyfileParse(source[0].get_contents())

   targets = []
   out_dir = data.get("OUTPUT_DIRECTORY", ".")

   # add our output locations
   for (k, v) in output_formats.items():
      if data.get("GENERATE_" + k, v[0]) == "YES":
         targets.append("/".join([out_dir, data.get(k + "_OUTPUT", v[1])]))

   # don't clobber targets
   for node in targets:
      env.Precious(node)

   # set up cleaning stuff
   for node in targets:
      env.Clean(node, node)

   return (targets, source)

def generate(env):
   """
   Add builders and construction variables for the
   Doxygen tool.  This is currently for Doxygen 1.4.6.
   """
   doxygen_scanner = env.Scanner(
      DoxySourceScan,
      "DoxySourceScan",
      scan_check = DoxySourceScanCheck,
   )

   doxygen_builder = env.Builder(
      action = env.Action("${DOXYGEN} ${SOURCE}"),
      emitter = DoxyEmitter,
      target_factory = env.fs.Entry,
      single_source = True,
      source_scanner =  doxygen_scanner,
   )

   env.Append(BUILDERS = {
      'Doxygen': doxygen_builder,
   })

   env.AppendUnique(
      DOXYGEN = 'doxygen',
   )

def exists(env):
   """
   Make sure doxygen exists.
   """
   return env.Detect("doxygen")