fix file descriptor leak in cmd.run()

we were leaking pipes.

pkgs/clan-cli/clan_cli/cmd.py

@@ -120,23 +120,23 @@ def run(
     tstart = datetime.datetime.now(tz=datetime.UTC)
 
     # Start the subprocess
-    process = subprocess.Popen(
+    with subprocess.Popen(
         cmd,
         cwd=str(cwd),
         env=env,
         stdout=subprocess.PIPE,
         stderr=subprocess.PIPE,
-    )
-    stdout_buf, stderr_buf = handle_output(process, log)
+    ) as process:
+        stdout_buf, stderr_buf = handle_output(process, log)
 
-    if input:
-        process.communicate(input)
-    else:
-        process.wait()
-    tend = datetime.datetime.now(tz=datetime.UTC)
+        if input:
+            process.communicate(input)
+        else:
+            process.wait()
+        tend = datetime.datetime.now(tz=datetime.UTC)
 
-    global TIME_TABLE
-    TIME_TABLE.add(shlex.join(cmd), tend - tstart)
+        global TIME_TABLE
+        TIME_TABLE.add(shlex.join(cmd), tend - tstart)
 
     # Wait for the subprocess to finish
     cmd_out = CmdOut(