only include files in our graalpython sources

Author: timfel

mx.graalpython/mx_graalpython.py

@@ -1269,6 +1269,7 @@ def python_coverage(args):
         if os.path.exists(outputlcov):
             os.unlink(outputlcov)
         cmdargs = ["/usr/bin/env", "lcov", "-o", outputlcov]
+        prefix = os.path.join(SUITE.dir, "graalpython")
         for kwds in variants:
             variant_str = re.sub(r"[^a-zA-Z]", "_", str(kwds))
             for pattern in ["py"]:
@@ -1278,7 +1279,7 @@ def python_coverage(args):
                 extra_args = [
                     "--coverage",
                     "--coverage.TrackInternal",
-                    "--coverage.FilterFile=*.%s" % pattern,
+                    "--coverage.FilterFile=%s/*.%s" % (prefix, pattern),
                     "--coverage.Output=lcov",
                     "--coverage.OutputFile=%s" % outfile,
                 ]
@@ -1311,7 +1312,7 @@ def python_coverage(args):
             datetime.datetime.fromtimestamp(info['author-ts']).strftime('%Y-%m-%d_%H_%M'),
             rev[:7],
         )
-        mx.run(["/usr/bin/env", "genhtml", "--ignore-errors", "source", "-o", coverage_dir, outputlcov])
+        mx.run(["/usr/bin/env", "genhtml", "--prefix", prefix, "--ignore-errors", "source", "-o", coverage_dir, outputlcov])
         if args.truffle_upload_url:
             if not args.truffle_upload_url.endswith("/"):
                 args.truffle_upload_url = args.truffle_upload_url + "/"