[Init] Initial commit - NetMesh terminal manager

electron/bridges/ai/liveShellProbe.cjs

@@ -0,0 +1,37 @@
+"use strict";
+
+const { buildBashHistoryCleanup, bashHistoryScratchNames } = require("./ptyExecHelpers.cjs");
+
+// Both fish and POSIX shells accept this command. Inspect the parent of a
+// short-lived sh in the interactive PTY, rather than the SSH login shell.
+function buildLiveShellProbe(marker) {
+  const script = 'if test -r "/proc/$PPID/comm"; then IFS= read -r name < "/proc/$PPID/comm"; else name=$(ps -p "$PPID" -o comm= 2>/dev/null); fi; '
+    + `printf "${marker}_P:%s\\n" "$name"`;
+  // command eval bypasses an eval customization; plain eval is the fallback
+  // when command itself is shadowed. Never invoke a shadowed builtin after the
+  // command path already succeeded. Both eval bodies remain Bash-guarded.
+  const cleanup = buildBashHistoryCleanup(marker, true);
+  const { dispatcher } = bashHistoryScratchNames(marker);
+  const clear = `[ -z "\${${dispatcher}-}" ]||$${dispatcher} unset ${dispatcher}`;
+  const fallback = `[ "\${${dispatcher}-}" = command ]||{ ${cleanup}; };${clear}`;
+  // Continuation lines stay within canonical input limits. Each echo carries
+  // the marker so the renderer also hides continuation prompts.
+  return ` true ${marker}; command sh -c '${script}' 2>/dev/null; \\\n: '${marker}'; \\command eval '${cleanup}' 2>/dev/null || true; \\\n: '${marker}'; \\eval '${fallback}' 2>/dev/null || true; \\\n: '${marker}'; \\command eval '${clear}' 2>/dev/null || true; printf '%s' '${marker}_Q'\n`;
+
+}
+
+function parseLiveShellProbe(output, marker) {
+  const lines = String(output).replace(/\r/g, "\n").split("\n");
+  if (!lines.some((line) => line.startsWith(`${marker}_Q`))) return null;
+  for (const line of lines) {
+    if (!line.startsWith(`${marker}_P:`)) continue;
+    const name = line.slice(marker.length + 3).trim().split("/").pop().replace(/^-/, "");
+    return {
+      kind: name === "fish" ? "fish"
+        : /^(?:ba|da|z|k|a)?sh$/.test(name) ? "posix" : null,
+    };
+  }
+  return { kind: null };
+}
+
+module.exports = { buildLiveShellProbe, parseLiveShellProbe };