Fix the project metadata command (#1081)

docs/history/hatch.md

@@ -37,6 +37,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Fix nushell activation
 - Better handling of flat storage directory hierarchies for the `virtual` environment type
 - Display useful information when running the `version` command outside of a project rather than erroring
+- Fix the `project metadata` command by only capturing stdout from the backend
 - Properly support Google Artifact Registry
 
 ## [1.7.0](https://github.com/pypa/hatch/releases/tag/hatch-v1.7.0) - 2023-04-03 ## {: #hatch-v1.7.0 }

src/hatch/cli/project/metadata.py

@@ -41,8 +41,11 @@ def metadata(app, field):
             ) as status, environment.build_environment(app.project.metadata.build.requires):
                 status.stop()
 
-                command = ['python', '-u', '-m', 'hatchling', 'metadata', '--compact']
-                output = app.platform.check_command_output(command)
+                output = app.platform.check_command_output(
+                    ['python', '-u', '-m', 'hatchling', 'metadata', '--compact'],
+                    # Only capture stdout
+                    stderr=None,
+                )
                 project_metadata = json.loads(output)
 
     if field:

src/hatch/utils/platform.py

@@ -115,14 +115,11 @@ def check_command_output(self, command: str | list[str], *, shell: bool = False,
         [capture_process](utilities.md#hatch.utils.platform.Platform.capture_process),
         but non-zero exit codes will gracefully end program execution.
         """
+        kwargs.setdefault('stdout', self.modules.subprocess.PIPE)
+        kwargs.setdefault('stderr', self.modules.subprocess.STDOUT)
         self.populate_default_popen_kwargs(kwargs, shell=shell)
-        process = self.modules.subprocess.run(
-            command,
-            shell=shell,
-            stdout=self.modules.subprocess.PIPE,
-            stderr=self.modules.subprocess.STDOUT,
-            **kwargs,
-        )
+
+        process = self.modules.subprocess.run(command, shell=shell, **kwargs)
         if process.returncode:
             self.__display_func(process.stdout.decode('utf-8'))
             self.exit_with_code(process.returncode)