Merge pull request 'Fix BW Manager deploy staging argv limit' (#18) from fix/bw-deploy-argv-20260812 into main

app.py

@@ -1210,21 +1210,28 @@ def _deploy_bw_manager_compose(files: dict[str, str]) -> dict:
     backup = f"/app-config/deployment-backups/bw-manager-{timestamp}"
     image = "bw-manager-bw-manager"
     rollback_image = f"{image}:rollback-{timestamp}"
-    script = f"""from pathlib import Path
+    init_script = f"""from pathlib import Path
 import shutil
 candidate = Path({candidate!r})
 if candidate.exists(): shutil.rmtree(candidate)
 candidate.mkdir(parents=True)
-for relative, content in {files!r}.items():
-    target = candidate / relative
-    target.parent.mkdir(parents=True, exist_ok=True)
-    target.write_text(content)
 live_env = Path({working_dir!r}) / '.env'
 if live_env.exists(): shutil.copy2(live_env, candidate / '.env')
 """
-    rc, _out, err = _remote_python(script)
+    rc, _out, err = _remote_python(init_script)
     if rc != 0:
-        raise RuntimeError(f"BW Manager candidate staging failed: {err[-300:]}")
+        raise RuntimeError(f"BW Manager candidate initialization failed: {err[-300:]}")
+    # Stage one file per SSH call. Sending the complete repository in one
+    # command exceeds Linux's argv limit once app.py and templates are encoded.
+    for relative, content in files.items():
+        file_script = f"""from pathlib import Path
+target = Path({candidate!r}) / {relative!r}
+target.parent.mkdir(parents=True, exist_ok=True)
+target.write_text({content!r})
+"""
+        rc, _out, err = _remote_python(file_script)
+        if rc != 0:
+            raise RuntimeError(f"BW Manager staging failed for {relative}: {err[-300:]}")
     rc, _out, err = _ssh(VPS_SSH, f"cd {candidate} && docker compose config -q && docker compose build --pull", timeout=600)
     if rc != 0:
         raise RuntimeError(f"BW Manager candidate build failed: {err[-500:]}")