calibredb: Add a new 'embed_metadata' command to update metadata in the actual book files in the calibre library from the calibre database.

src/calibre/customize/ui.py

@@ -364,7 +364,8 @@ def set_file_type_metadata(stream, mi, ftype, report_error=None):
                         break
                     except:
                         if report_error is None:
-                            print 'Failed to set metadata for', repr(getattr(mi, 'title', ''))
+                            from calibre import prints
+                            prints('Failed to set metadata for the', ftype.upper(), 'format of:', getattr(mi, 'title', ''), file=sys.stderr)
                             traceback.print_exc()
                         else:
                             report_error(mi, ftype, traceback.format_exc())

src/calibre/db/cache.py

@@ -1797,7 +1797,7 @@ class Cache(object):
         return {k:tuple(sorted(v, key=sort_key)) for k, v in ans.iteritems()}
 
     @write_api
-    def embed_metadata(self, book_ids, only_fmts=None, report_error=None):
+    def embed_metadata(self, book_ids, only_fmts=None, report_error=None, report_progress=None):
         ''' Update metadata in all formats of the specified book_ids to current metadata in the database. '''
         field = self.fields['formats']
         from calibre.ebooks.metadata.opf2 import pretty_print
@@ -1812,7 +1812,7 @@ class Cache(object):
             stream.seek(0, os.SEEK_END)
             return stream.tell()
 
-        for book_id in book_ids:
+        for i, book_id in enumerate(book_ids):
             fmts = field.table.book_col_map.get(book_id, ())
             if not fmts:
                 continue
@@ -1834,6 +1834,8 @@ class Cache(object):
                         self.format_metadata_cache[book_id].get(fmt, {})['size'] = new_size
                         max_size = self.fields['formats'].table.update_fmt(book_id, fmt, name, new_size, self.backend)
                         self.fields['size'].table.update_sizes({book_id: max_size})
+            if report_progress is not None:
+                report_progress(i+1, len(book_ids), mi)
 
     # }}}
 

src/calibre/library/cli.py

@@ -583,6 +583,43 @@ an OPF file.
         ' with the --field option'))
     return parser
 
+def embed_metadata_option_parser():
+    parser = get_parser(_(
+'''
+%prog embed_metadata [options] book_id
+
+Update the metadata in the actual book files stored in the calibre library from
+the metadata in the calibre database.  Normally, metadata is updated only when
+exporting files from calibre, this command is useful if you want the files to
+be updated in place. Note that different file formats support different amounts
+of metadata. You can use the special value 'all' for book_id to update metadata
+in all books. You can also specify many book ids separated by spaces and id ranges
+separated by hyphens. For example: %prog embed_metadata 1 2 10-15 23'''))
+    parser.add_option('-f', '--only-formats', action='append', default=[], help=_(
+        'Only update metadata in files of the specified format. Specify it multiple'
+        ' times for multiple formats. Be default, all formats are updated.'))
+    return parser
+
+def command_embed_metadata(args, dbpath):
+    parser = embed_metadata_option_parser()
+    opts, args = parser.parse_args(sys.argv[0:1]+args)
+    db = get_db(dbpath, opts)
+    ids = set()
+    for x in args[1:]:
+        if x == 'all':
+            ids = db.new_api.all_book_ids()
+            break
+        parts = x.split('-')
+        if len(parts) == 1:
+            ids.add(int(parts[0]))
+        else:
+            ids |= {x for x in xrange(int(parts[0], int(parts[1])))}
+    only_fmts = opts.only_formats or None
+    def progress(i, total, mi):
+        prints(_('Processed {0} ({1} of {2})').format(mi.title, i, total))
+    db.new_api.embed_metadata(ids, only_fmts=only_fmts, report_progress=progress)
+    send_message()
+
 def command_set_metadata(args, dbpath):
     parser = set_metadata_option_parser()
     opts, args = parser.parse_args(sys.argv[0:1]+args)
@@ -1463,7 +1500,7 @@ COMMANDS = ('list', 'add', 'remove', 'add_format', 'remove_format',
             'saved_searches', 'add_custom_column', 'custom_columns',
             'remove_custom_column', 'set_custom', 'restore_database',
             'check_library', 'list_categories', 'backup_metadata',
-            'clone')
+            'clone', 'embed_metadata')
 
 
 def option_parser():