refactor dumping of json

Summary: public
Small refactoring.

Reviewed By: jeremydubreil

Differential Revision: D2679580

fb-gh-sync-id: b1e6061

infer/lib/python/BuckAnalyze

@@ -408,8 +408,7 @@ def collect_results(args, start_time):
     store_performances_csv(args.infer_out, stats)
 
     stats_filename = os.path.join(args.infer_out, config.STATS_FILENAME)
-    with open(stats_filename, 'w') as stats_out:
-        json.dump(stats, stats_out, indent=2)
+    utils.dump_json_to_path(stats, stats_filename)
 
     basic_stats = get_basic_stats(stats)
 

infer/lib/python/inferlib/analyze.py

@@ -535,9 +535,7 @@ class Infer:
         }
 
         stats_path = os.path.join(self.args.infer_out, config.STATS_FILENAME)
-        with codecs.open(stats_path, 'w',
-                         encoding=config.LOCALE) as stats_file:
-            json.dump(self.stats, stats_file, indent=2)
+        utils.dump_json_to_path(self.stats, stats_path)
 
 
     def close(self):

infer/lib/python/inferlib/capture/buck.py

@@ -139,8 +139,7 @@ class BuckAnalyzer:
         all_results = utils.merge_json_arrays_from_files(result_files)
         merged_results_path = os.path.join(self.args.infer_out,
                                            config.JSON_REPORT_FILENAME)
-        with open(merged_results_path, 'w') as file_out:
-            json.dump(all_results, file_out, indent=2)
+        utils.dump_json_to_path(all_results, merged_results_path)
         print('Results saved in {results_path}'.format(
             results_path=merged_results_path))
         return os.EX_OK

infer/lib/python/inferlib/issues.py

@@ -134,10 +134,8 @@ def clean_json(args, json_report):
             collected_rows,
             cmp=_compare_json_rows)
     temporary_file = tempfile.mktemp()
-    with open(temporary_file, 'w') as file_out:
-        json.dump(collected_rows, file_out, indent=2)
-        file_out.flush()
-        shutil.move(temporary_file, json_report)
+    utils.dump_json_to_path(collected_rows, temporary_file)
+    shutil.move(temporary_file, json_report)
 
 
 def print_and_save_errors(json_report, bugs_out):

infer/lib/python/inferlib/utils.py

@@ -128,6 +128,20 @@ def run_command(cmd, debug_mode, infer_out, message, env=os.environ):
         raise e
 
 
+def dump_json_to_path(
+        data, path,
+        skipkeys=False, ensure_ascii=True, check_circular=True, allow_nan=True,
+        cls=None,
+        indent=2,  # customized
+        separators=None,
+        encoding=config.LOCALE,  # customized
+        default=None, sort_keys=False, **kw):
+    with codecs.open(path, 'w', encoding=config.LOCALE) as file_out:
+        json.dump(data, file_out,
+                  skipkeys, ensure_ascii, check_circular, allow_nan, cls,
+                  indent, separators, encoding, default, sort_keys, **kw)
+
+
 def merge_json_arrays_from_files(report_paths):
     # TODO: use streams instead of loading the entire json in memory
     json_data = []