utils/scanpypi: write _SOURCE only when needed

For some packages, there's no need to add the _SOURCE variable, since
the name of the source file is the same as the name of the package
(like python-engineio). Hence, we'll add it to the .mk file only if
needed.

Signed-off-by: Asaf Kahlon <asafka7@gmail.com>
Reviewed-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

utils/scanpypi

@@ -354,13 +354,14 @@ class BuildrootPackage():
             version=self.version)
         lines.append(version_line)
 
-        targz = self.filename.replace(
-            self.version,
-            '$({name}_VERSION)'.format(name=self.mk_name))
-        targz_line = '{name}_SOURCE = {filename}\n'.format(
-            name=self.mk_name,
-            filename=targz)
-        lines.append(targz_line)
+        if self.buildroot_name != self.real_name:
+            targz = self.filename.replace(
+                self.version,
+                '$({name}_VERSION)'.format(name=self.mk_name))
+            targz_line = '{name}_SOURCE = {filename}\n'.format(
+                name=self.mk_name,
+                filename=targz)
+            lines.append(targz_line)
 
         if self.filename not in self.url:
             # Sometimes the filename is in the url, sometimes it's not