Restart repository history from target event

lib/utils/paths.ts

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+import path from 'path';
+import fs from 'fs-extra';
+
+// The watch folder is in the project root, which is the parent of the 'src' directory.
+// process.cwd() in Next.js usually points to the project root (where package.json is).
+// If package.json is in 'src', then process.cwd() is 'src'.
+// Let's assume the structure:
+// /Project
+//   /src (Next.js app)
+//   /watch
+
+export const WATCH_DIR_NAME = 'watch';
+export const SPECTROGRAMS_DIR_NAME = 'spectrograms';
+
+export function getWatchPath(): string {
+    if (process.env.WATCH_DIR) {
+        return process.env.WATCH_DIR;
+    }
+
+    // We assume the app is running from 'src' or the root containing 'src'.
+    // If process.cwd() is .../Crossfade/src, then watch is ../watch
+    // If process.cwd() is .../Crossfade, then watch is ./watch
+
+    const cwd = process.cwd();
+    if (cwd.endsWith('src')) {
+        return path.join(cwd, '..', WATCH_DIR_NAME);
+    }
+    return path.join(cwd, WATCH_DIR_NAME);
+}
+
+export function getSpectrogramsPath(): string {
+    const cwd = process.cwd();
+    if (cwd.endsWith('src')) {
+        return path.join(cwd, '..', SPECTROGRAMS_DIR_NAME);
+    }
+    return path.join(cwd, SPECTROGRAMS_DIR_NAME);
+}
+
+export async function ensureWatchDir() {
+    const watchPath = getWatchPath();
+    await fs.ensureDir(watchPath);
+    return watchPath;
+}
+
+export async function ensureSpectrogramsDir() {
+    const specPath = getSpectrogramsPath();
+    await fs.ensureDir(specPath);
+    return specPath;
+}
+
+export function getOutputDir(): string | null {
+    const outputDir = process.env.OUTPUT_DIR;
+    if (!outputDir) return null;
+    return outputDir;
+}