Merge pull request #427 from zestsoftware/maurits-ignore-build-stderr

Ignore error output when calling `build`.

CHANGES.rst

@@ -4,6 +4,11 @@ Changelog for zest.releaser
 9.0.0a2 (unreleased)
 --------------------
 
+- Ignore error output when calling `build`.
+  We only need to look at the exit code to see if it worked.
+  You can call zest.releaser with ``--verbose`` if you want 
+  to see the possible warnings.
+
 - Removed ``encoding`` config option as nobody is using it anymore (using the
   option would result in a crash). Apparently it isn't needed anymore now that
   we don't use python 2 anymore. Fixes `issue 391

zest/releaser/utils.py

@@ -656,7 +656,7 @@ def _execute_command(command, cwd=None, extra_environ=None):
         show_stderr = False
         # But we really DO want to see the stderr for some other Python commands,
         # otherwise for example a failed upload would not even show up in the output.
-        for flag in ("upload", "register", "build_sdist", "build_wheel", "-mbuild"):
+        for flag in ("upload", "register"):
             if flag in command:
                 show_stderr = True
                 break