feat(plugins): add managed runtime SDK and release 2.4.5

artemis/plugins/_process_worker.py

@@ -0,0 +1,57 @@
+"""Private launch barrier for sdk.run_process; stdlib-only under Python -I."""
+
+import json
+import os
+from pathlib import Path
+import signal
+import subprocess
+import sys
+import threading
+import time
+
+
+def watch_parent(expected: int):
+    while True:
+        if os.getppid() != expected:
+            os.killpg(os.getpid(), signal.SIGKILL)
+        time.sleep(0.1)
+
+
+def main():
+    status = Path(sys.argv[1])
+    if os.name != "nt":
+        threading.Thread(target=watch_parent, args=(int(sys.argv[2]),), daemon=True).start()
+    # Until the parent owns our job/session and sends this line, no business
+    # process can start. Buffering is local; tool stdin uses a separate pipe.
+    control = sys.stdin.buffer.readline(1024 * 1024 + 1)
+    if not control.endswith(b"\n") or len(control) > 1024 * 1024:
+        return
+    request = json.loads(control)
+    size = request["input_size"]
+    if type(size) is not int or not 0 <= size <= 64 * 1024 * 1024:
+        return
+    content = sys.stdin.buffer.read(size) if request["has_input"] else None
+    if content is not None and len(content) != size:
+        return
+    try:
+        result = subprocess.run(
+            request["argv"],
+            shell=False,
+            stdin=None if request["has_input"] else subprocess.DEVNULL,
+            input=content,
+            creationflags=subprocess.CREATE_NO_WINDOW if os.name == "nt" else 0,
+            check=False,
+        )
+        response = {"returncode": result.returncode}
+    except OSError:
+        response = {"launch_failed": True}
+    pending = status.with_suffix(".tmp")
+    pending.write_text(json.dumps(response), encoding="utf-8")
+    pending.replace(status)
+    # Remain the session/group leader until the owner reclaims the whole tree.
+    while True:
+        time.sleep(60)
+
+
+if __name__ == "__main__":
+    main()