Add pi web POC

src/server/workspaces/gitWorktreeDiscovery.ts

@@ -0,0 +1,38 @@
+import { execFile } from "node:child_process";
+import { promisify } from "node:util";
+
+const execFileAsync = promisify(execFile);
+
+export interface GitWorktreeInfo {
+  path: string;
+  branch?: string;
+  bare?: boolean;
+  detached?: boolean;
+}
+
+export async function isGitRepository(path: string): Promise<boolean> {
+  try {
+    const { stdout } = await execFileAsync("git", ["-C", path, "rev-parse", "--is-inside-work-tree"]);
+    return stdout.trim() === "true";
+  } catch {
+    return false;
+  }
+}
+
+export async function discoverGitWorktrees(path: string): Promise<GitWorktreeInfo[]> {
+  const { stdout } = await execFileAsync("git", ["-C", path, "worktree", "list", "--porcelain"]);
+  const chunks = stdout.trim().split(/\n\s*\n/).filter(Boolean);
+
+  return chunks.map((chunk) => {
+    const info: GitWorktreeInfo = { path: "" };
+    for (const line of chunk.split("\n")) {
+      const [key, ...rest] = line.split(" ");
+      const value = rest.join(" ");
+      if (key === "worktree") info.path = value;
+      if (key === "branch") info.branch = value.replace(/^refs\/heads\//, "");
+      if (key === "bare") info.bare = true;
+      if (key === "detached") info.detached = true;
+    }
+    return info;
+  }).filter((w) => w.path);
+}