Merge pull request conda#7873 from geremih/fix/write-repodata-as-unicode

Encode repodata to utf-8 while caching

Author: msarahan

conda/core/subdir_data.py

@@ -16,6 +16,7 @@
 import re
 from time import time
 import warnings
+from io import open as io_open
 
 from .. import CondaError
 from .._vendor.auxlib.ish import dals
@@ -226,7 +227,7 @@ def _load(self):
             if not isdir(dirname(self.cache_path_json)):
                 mkdir_p(dirname(self.cache_path_json))
             try:
-                with open(self.cache_path_json, 'w') as fh:
+                with io_open(self.cache_path_json, 'w') as fh:
                     fh.write(raw_repodata_str or '{}')
             except (IOError, OSError) as e:
                 if e.errno in (EACCES, EPERM):
@@ -550,12 +551,12 @@ def maybe_decompress(filename, resp_content):
 
     # add extra values to the raw repodata json
     if json_str and json_str != "{}":
-        raw_repodata_str = "%s, %s" % (
+        raw_repodata_str = u"%s, %s" % (
             json.dumps(saved_fields)[:-1],  # remove trailing '}'
             json_str[1:]  # remove first '{'
         )
     else:
-        raw_repodata_str = json.dumps(saved_fields)
+        raw_repodata_str = ensure_text_type(json.dumps(saved_fields))
     return raw_repodata_str