Sorted out mime initialization.

Every mime related function in main __init__.py has a flag check for the
check if initialization has already done. This is nonsense, since it
should be done implicitly early on the converter is starting.

This commit straight the things out, and initialization is done in cli
module.

Also, function guess_type was removed, since it's just a proxy for
mimetypes.guess_type function.

ebook_converter/ebooks/oeb/transforms/cover.py

@@ -1,9 +1,9 @@
+import mimetypes
 import textwrap
 import urllib.parse
 
 from lxml import etree
 
-from ebook_converter import guess_type
 from ebook_converter.utils.imghdr import identify
 from ebook_converter.polyglot.urllib import unquote
 
@@ -115,7 +115,7 @@ class CoverManager(object):
                         else self.svg_template
                 tp = templ % unquote(href)
                 id, href = m.generate('titlepage', 'titlepage.xhtml')
-                item = m.add(id, href, guess_type('t.xhtml')[0],
+                item = m.add(id, href, mimetypes.guess_type('t.xhtml')[0],
                              data=etree.fromstring(tp))
         else:
             key = urllib.parse.urldefrag(self.oeb.guide['titlepage'].href)[0]

ebook_converter/ebooks/oeb/transforms/data_url.py

@@ -1,3 +1,4 @@
+import mimetypes
 import re
 from ebook_converter.ebooks.oeb.base import XPath, urlunquote
 from ebook_converter.polyglot.builtins import as_bytes
@@ -45,5 +46,6 @@ class DataURL(object):
         self.log('Found image encoded as data URI converting it to normal image')
         from ebook_converter import guess_type
         item_id, item_href = oeb.manifest.generate('data-url-image', 'data-url-image.' + fmt)
-        oeb.manifest.add(item_id, item_href, guess_type(item_href)[0], data=data)
+        oeb.manifest.add(item_id, item_href,
+                         mimetypes.guess_type(item_href)[0], data=data)
         return item_href

ebook_converter/ebooks/oeb/transforms/flatcss.py

@@ -3,6 +3,7 @@ CSS flattening transform.
 """
 import collections
 import math
+import mimetypes
 import numbers
 import operator
 import re
@@ -13,7 +14,6 @@ import css_parser
 from css_parser import css as cp_css
 
 from ebook_converter import constants as const
-from ebook_converter import guess_type
 from ebook_converter.ebooks import unit_convert
 from ebook_converter.ebooks.oeb import base
 from ebook_converter.ebooks.oeb import parse_utils
@@ -125,8 +125,9 @@ class EmbedFontsCSSRules(object):
             rules = [base.css_text(x) for x in self.rules]
             rules = '\n\n'.join(rules)
             sheet = css_parser.parseString(rules, validate=False)
-            self.href = oeb.manifest.add(iid, href, guess_type(href)[0],
-                    data=sheet).href
+            self.href = oeb.manifest.add(iid, href,
+                                         mimetypes.guess_type(href)[0],
+                                         data=sheet).href
         return self.href
 
 
@@ -244,7 +245,7 @@ class CSSFlattener(object):
             fid, href = self.oeb.manifest.generate(id=u'font',
                 href='fonts/%s.%s'%(ascii_filename(font['full_name']).replace(' ', '-'), ext))
             item = self.oeb.manifest.add(fid, href,
-                    guess_type('dummy.'+ext)[0],
+                    mimetypes.guess_type('dummy.'+ext)[0],
                     data=font_scanner.get_font_data(font))
             item.unload_data_from_memory()
 

ebook_converter/ebooks/oeb/transforms/jacket.py

@@ -1,3 +1,4 @@
+import mimetypes
 import sys, os, re
 from xml.sax.saxutils import escape
 from string import Formatter
@@ -5,7 +6,7 @@ import pkg_resources
 import urllib.parse
 
 from ebook_converter import constants as const
-from ebook_converter import guess_type, strftime
+from ebook_converter import strftime
 from ebook_converter.constants_old import iswindows
 from ebook_converter.ebooks.oeb import base
 from ebook_converter.ebooks.oeb.base import XPath, xml2text, urlnormalize
@@ -124,7 +125,8 @@ class Jacket(Base):
                 alt_comments=comments, rescale_fonts=True)
         id, href = self.oeb.manifest.generate('calibre_jacket', 'jacket.xhtml')
 
-        jacket = self.oeb.manifest.add(id, href, guess_type(href)[0], data=root)
+        jacket = self.oeb.manifest.add(id, href, mimetypes.guess_type(href)[0],
+                                       data=root)
         self.oeb.spine.insert(0, jacket, True)
         self.oeb.inserted_metadata_jacket = jacket
         for img, path in referenced_images(root):
@@ -132,7 +134,9 @@ class Jacket(Base):
             ext = path.rpartition('.')[-1].lower()
             item_id, href = self.oeb.manifest.generate('jacket_image', 'jacket_img.'+ext)
             with open(path, 'rb') as f:
-                item = self.oeb.manifest.add(item_id, href, guess_type(href)[0], data=f.read())
+                item = self.oeb.manifest.add(
+                    item_id, href, mimetypes.guess_type(href)[0],
+                    data=f.read())
             item.unload_data_from_memory()
             img.set('src', jacket.relhref(item.href))
 

ebook_converter/ebooks/oeb/transforms/metadata.py

@@ -1,9 +1,9 @@
+import mimetypes
 import os
 import re
 
 from ebook_converter.ebooks.oeb import base
 from ebook_converter.utils.date import isoformat, now
-from ebook_converter import guess_type
 
 
 def meta_info_to_oeb_metadata(mi, m, log, override_input_metadata=False):
@@ -156,9 +156,8 @@ class MergeMetadata(object):
         new_cover_item = None
         if cdata:
             id, href = self.oeb.manifest.generate('cover', 'cover.'+ext)
-            new_cover_item = self.oeb.manifest.add(id, href,
-                                                   guess_type('cover.'+ext)[0],
-                                                   data=cdata)
+            new_cover_item = self.oeb.manifest.add(
+                id, href, mimetypes.guess_type('cover.'+ext)[0], data=cdata)
             self.oeb.guide.add('cover', 'Cover', href)
         if do_remove_old_cover:
             self.remove_old_cover(item, new_cover_item.href)