Conversion: Fix regression that broke conversion of some epub files when using the "Remove first image" option. Fixes #1660699 [Private bug](https://bugs.launchpad.net/calibre/+bug/1660699)

Conversion: Ensure that the "Remove first image" conversion option does not remove the new cover image specified as a conversion option.

src/calibre/ebooks/conversion/plumber.py

@@ -1101,6 +1101,8 @@ OptionRecommendation(name='search_replace',
         self.opts.source = self.opts.input_profile
         self.opts.dest = self.opts.output_profile
 
+        from calibre.ebooks.oeb.transforms.jacket import RemoveFirstImage
+        RemoveFirstImage()(self.oeb, self.opts, self.user_metadata)
         from calibre.ebooks.oeb.transforms.metadata import MergeMetadata
         MergeMetadata()(self.oeb, self.user_metadata, self.opts,
                 override_input_metadata=self.override_input_metadata)

src/calibre/ebooks/oeb/transforms/jacket.py

@@ -34,11 +34,7 @@ class SafeFormatter(Formatter):
             return ''
 
 
-class Jacket(object):
-    '''
-    Book jacket manipulation. Remove first image and insert comments at start of
-    book.
-    '''
+class Base(object):
 
     def remove_images(self, item, limit=1):
         path = XPath('//h:img[@src]')
@@ -50,13 +46,19 @@ class Jacket(object):
             image = self.oeb.manifest.hrefs.get(href, None)
             if image is not None:
                 self.oeb.manifest.remove(image)
+                self.oeb.guide.remove_by_href(href)
                 img.getparent().remove(img)
                 removed += 1
         return removed
 
+
+class RemoveFirstImage(Base):
+
     def remove_first_image(self):
         deleted_item = None
         for item in self.oeb.spine:
+            if XPath(JACKET_XPATH)(item.data):
+                continue
             removed = self.remove_images(item)
             if removed > 0:
                 self.log('Removed first image')
@@ -74,6 +76,23 @@ class Jacket(object):
                 href = urldefrag(item.href)[0]
                 if href == deleted_item.href:
                     self.oeb.toc.remove(item)
+            self.oeb.guide.remove_by_href(deleted_item.href)
+
+    def __call__(self, oeb, opts, metadata):
+        '''
+        Add metadata in jacket.xhtml if specified in opts
+        If not specified, remove previous jacket instance
+        '''
+        self.oeb, self.opts, self.log = oeb, opts, oeb.log
+        if opts.remove_first_image:
+            self.remove_first_image()
+
+
+class Jacket(Base):
+    '''
+    Book jacket manipulation. Remove first image and insert comments at start of
+    book.
+    '''
 
     def insert_metadata(self, mi):
         self.log('Inserting metadata into book...')
@@ -125,8 +144,6 @@ class Jacket(object):
         '''
         self.oeb, self.opts, self.log = oeb, opts, oeb.log
         self.remove_existing_jacket()
-        if opts.remove_first_image:
-            self.remove_first_image()
         if opts.insert_metadata:
             self.insert_metadata(metadata)
 
@@ -338,4 +355,3 @@ def referenced_images(root):
                 path = path[1:]
             if os.path.exists(path):
                 yield img, path
-