Copy app (#349)

Fixes #12

e2e-tests/helpers/generateAppFilesSnapshotData.ts

@@ -0,0 +1,129 @@
+import fs from "fs";
+import path from "path";
+import crypto from "crypto";
+
+export interface FileSnapshotData {
+  relativePath: string;
+  content: string;
+}
+
+const binaryExtensions = new Set([
+  ".png",
+  ".jpg",
+  ".jpeg",
+  ".gif",
+  ".webp",
+  ".tiff",
+  ".psd",
+  ".raw",
+  ".bmp",
+  ".heif",
+  ".ico",
+  ".pdf",
+  ".eot",
+  ".otf",
+  ".ttf",
+  ".woff",
+  ".woff2",
+  ".zip",
+  ".tar",
+  ".gz",
+  ".7z",
+  ".rar",
+  ".mov",
+  ".mp4",
+  ".m4v",
+  ".mkv",
+  ".webm",
+  ".flv",
+  ".avi",
+  ".wmv",
+  ".mp3",
+  ".wav",
+  ".ogg",
+  ".flac",
+  ".exe",
+  ".dll",
+  ".so",
+  ".a",
+  ".lib",
+  ".o",
+  ".db",
+  ".sqlite3",
+  ".wasm",
+]);
+
+function isBinaryFile(filePath: string): boolean {
+  return binaryExtensions.has(path.extname(filePath).toLowerCase());
+}
+
+export function generateAppFilesSnapshotData(
+  currentPath: string,
+  basePath: string,
+): FileSnapshotData[] {
+  const ignorePatterns = [
+    ".git",
+    "node_modules",
+    // Avoid snapshotting lock files because they are getting generated
+    // automatically and cause noise, and not super important anyways.
+    "package-lock.json",
+    "pnpm-lock.yaml",
+  ];
+
+  const entries = fs.readdirSync(currentPath, { withFileTypes: true });
+  let files: FileSnapshotData[] = [];
+
+  // Sort entries for deterministic order
+  entries.sort((a, b) => a.name.localeCompare(b.name));
+
+  for (const entry of entries) {
+    const entryPath = path.join(currentPath, entry.name);
+    if (ignorePatterns.includes(entry.name)) {
+      continue;
+    }
+
+    if (entry.isDirectory()) {
+      files = files.concat(generateAppFilesSnapshotData(entryPath, basePath));
+    } else if (entry.isFile()) {
+      const relativePath = path
+        .relative(basePath, entryPath)
+        // Normalize path separators to always use /
+        // to prevent diffs on Windows.
+        .replace(/\\/g, "/");
+      try {
+        if (isBinaryFile(entryPath)) {
+          const fileBuffer = fs.readFileSync(entryPath);
+          const hash = crypto
+            .createHash("sha256")
+            .update(fileBuffer)
+            .digest("hex");
+          files.push({
+            relativePath,
+            content: `[binary hash="${hash}"]`,
+          });
+          continue;
+        }
+
+        let content = fs
+          .readFileSync(entryPath, "utf-8")
+          // Normalize line endings to always use \n
+          .replace(/\r\n/g, "\n");
+        if (entry.name === "package.json") {
+          const packageJson = JSON.parse(content);
+          packageJson.packageManager = "<scrubbed>";
+          content = JSON.stringify(packageJson, null, 2);
+        }
+        files.push({ relativePath, content });
+      } catch (error) {
+        // Could be a binary file or permission issue, log and add a placeholder
+        const e = error as Error;
+        console.warn(`Could not read file ${entryPath}: ${e.message}`);
+        files.push({
+          relativePath,
+          content: `[Error reading file: ${e.message}]`,
+        });
+      }
+    }
+  }
+  return files;
+}