fix: isolate dev runner worktree env

server/src/dev-runner-worktree.ts

@@ -0,0 +1,81 @@
+import { existsSync, lstatSync, readFileSync } from "node:fs";
+import path from "node:path";
+
+function parseEnvFile(contents: string): Record<string, string> {
+  const entries: Record<string, string> = {};
+
+  for (const rawLine of contents.split(/\r?\n/)) {
+    const line = rawLine.trim();
+    if (!line || line.startsWith("#")) continue;
+
+    const match = rawLine.match(/^\s*(?:export\s+)?([A-Za-z_][A-Za-z0-9_]*)\s*=\s*(.*)\s*$/);
+    if (!match) continue;
+
+    const [, key, rawValue] = match;
+    const value = rawValue.trim();
+    if (!value) {
+      entries[key] = "";
+      continue;
+    }
+
+    if (
+      (value.startsWith("\"") && value.endsWith("\"")) ||
+      (value.startsWith("'") && value.endsWith("'"))
+    ) {
+      entries[key] = value.slice(1, -1);
+      continue;
+    }
+
+    entries[key] = value.replace(/\s+#.*$/, "").trim();
+  }
+
+  return entries;
+}
+
+export function isLinkedGitWorktreeCheckout(rootDir: string): boolean {
+  const gitMetadataPath = path.join(rootDir, ".git");
+  if (!existsSync(gitMetadataPath)) return false;
+
+  const stat = lstatSync(gitMetadataPath);
+  if (!stat.isFile()) return false;
+
+  return readFileSync(gitMetadataPath, "utf8").trimStart().startsWith("gitdir:");
+}
+
+export function resolveWorktreeEnvFilePath(rootDir: string): string {
+  return path.resolve(rootDir, ".paperclip", ".env");
+}
+
+export function bootstrapDevRunnerWorktreeEnv(
+  rootDir: string,
+  env: NodeJS.ProcessEnv = process.env,
+): {
+  envPath: string | null;
+  missingEnv: boolean;
+} {
+  if (!isLinkedGitWorktreeCheckout(rootDir)) {
+    return {
+      envPath: null,
+      missingEnv: false,
+    };
+  }
+
+  const envPath = resolveWorktreeEnvFilePath(rootDir);
+  if (!existsSync(envPath)) {
+    return {
+      envPath,
+      missingEnv: true,
+    };
+  }
+
+  const entries = parseEnvFile(readFileSync(envPath, "utf8"));
+  for (const [key, value] of Object.entries(entries)) {
+    if (typeof env[key] === "string" && env[key]!.trim().length > 0) continue;
+    env[key] = value;
+  }
+
+  return {
+    envPath,
+    missingEnv: false,
+  };
+}