Port calibredb remove_format

src/calibre/db/cli/cmd_remove_format.py

@@ -0,0 +1,45 @@
+#!/usr/bin/env python2
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2017, Kovid Goyal <kovid at kovidgoyal.net>
+
+from __future__ import absolute_import, division, print_function, unicode_literals
+
+from calibre.db.delete_service import delete_service
+from calibre.srv.changes import formats_removed
+
+readonly = False
+version = 0  # change this if you change signature of implementation()
+
+
+def implementation(db, notify_changes, book_id, fmt):
+    is_remote = notify_changes is not None
+    fmt_map = {book_id: (fmt, )}
+    db.remove_formats(fmt_map)
+    delete_service().wait()
+    if is_remote:
+        notify_changes(formats_removed(fmt_map))
+
+
+def option_parser(get_parser):
+    return get_parser(
+        _(
+            '''
+%prog remove_format [options] id fmt
+
+Remove the format fmt from the logical book identified by id. \
+You can get id by using the search command. fmt should be a file extension \
+like LRF or TXT or EPUB. If the logical book does not have fmt available, \
+do nothing.
+'''
+        )
+    )
+
+
+def main(opts, args, dbctx):
+    if len(args) < 2:
+        raise SystemExit(_('You must specify an id and a format'))
+        return 1
+
+    id, fmt = int(args[0]), args[1].upper()
+    dbctx.run('remove_format', id, fmt)
+    return 0