khh

SYS/tasks.py

@@ -102,6 +102,23 @@ def _run_task(args, parser) -> int:
         'command': command,
         'cwd': args.cwd or os.getcwd(),
     })
+
+    popen_kwargs = {}
+    if os.name == 'nt':
+        # Avoid flashing a console window when spawning console-subsystem executables.
+        flags = 0
+        try:
+            flags |= int(getattr(subprocess, 'CREATE_NO_WINDOW', 0x08000000))
+        except Exception:
+            flags |= 0x08000000
+        popen_kwargs['creationflags'] = flags
+        try:
+            si = subprocess.STARTUPINFO()
+            si.dwFlags |= subprocess.STARTF_USESHOWWINDOW
+            si.wShowWindow = subprocess.SW_HIDE
+            popen_kwargs['startupinfo'] = si
+        except Exception:
+            pass
     try:
         process = subprocess.Popen(
             command,
@@ -112,6 +129,7 @@ def _run_task(args, parser) -> int:
             text=True,
             bufsize=1,
             universal_newlines=True,
+            **popen_kwargs,
         )
     except FileNotFoundError as exc:
         notifier('downlow-task-event', {