Bug 1834673 - Part 1: Use UTF-8 in LCOV rewriter. r=firefox-build-system-reviewers,nalexander

Differential Revision: https://phabricator.services.mozilla.com/D179051

python/mozbuild/mozbuild/codecoverage/lcov_rewriter.py

@@ -235,7 +235,7 @@ class LcovFile(object):
         current_pp_info = None
         current_lines = []
         for lcov_path in self.lcov_paths:
-            with open(lcov_path) as lcov_fh:
+            with open(lcov_path, "r", encoding="utf-8") as lcov_fh:
                 for line in lcov_fh:
                     line = line.rstrip()
                     if not line:
@@ -433,7 +433,7 @@ class UrlFinder(object):
         self._final_mapping = {}
 
         try:
-            with open(chrome_map_path) as fh:
+            with open(chrome_map_path, "r", encoding="utf-8") as fh:
                 url_prefixes, overrides, install_info, buildconfig = json.load(fh)
         except IOError:
             print(
@@ -692,14 +692,14 @@ class LcovFileRewriter(object):
 
         if output_file:
             lcov_file = LcovFile(in_paths)
-            with open(output_file, "w+") as out_fh:
+            with open(output_file, "w+", encoding="utf-8") as out_fh:
                 lcov_file.print_file(
                     out_fh, rewrite_source, self.pp_rewriter.rewrite_record
                 )
         else:
             for in_path in in_paths:
                 lcov_file = LcovFile([in_path])
-                with open(in_path + output_suffix, "w+") as out_fh:
+                with open(in_path + output_suffix, "w+", encoding="utf-8") as out_fh:
                     lcov_file.print_file(
                         out_fh, rewrite_source, self.pp_rewriter.rewrite_record
                     )