refactor: simplified inline find-up

no need for the extra dep

package.json

@@ -15,7 +15,6 @@
     "typecheck": "tsc --noEmit"
   },
   "dependencies": {
-    "find-up": "^5.0.0",
     "glob": "^7.2.0",
     "tslib": "^2.3.1",
     "type-fest": "^2.8.0"

src/directory-context.ts

@@ -1,10 +1,10 @@
 import fs from 'fs';
 import path from 'path';
-import findUp from 'find-up';
 import type { PackageJson } from 'type-fest';
 import { resolveWorkspacePackages, extractPackageLocations } from './yarn-workspaces';
 import { isPlainObject, isString } from './language-helpers';
 import { INpmPackage, PACKAGE_JSON, resolveLinkedPackages, sortPackagesByDepth } from './npm-package';
+import { findFileUpSync } from './find-up';
 
 export interface SinglePackageContext {
   type: 'single';
@@ -18,7 +18,7 @@ export interface MultiPackageContext {
 }
 
 export function resolveDirectoryContext(basePath: string): SinglePackageContext | MultiPackageContext {
-  const packageJsonPath = findUp.sync(PACKAGE_JSON, { cwd: basePath });
+  const packageJsonPath = findFileUpSync(basePath, PACKAGE_JSON);
 
   if (!isString(packageJsonPath)) {
     throw new Error(`Cannot find ${PACKAGE_JSON} for ${basePath}`);

src/find-up.ts

@@ -0,0 +1,23 @@
+import { statSync } from 'fs';
+import { dirname, join } from 'path';
+
+export function findFileUpSync(directoryPath: string, fileName: string) {
+  for (const directoryInChain of pathChainToRoot(directoryPath)) {
+    const filePath = join(directoryInChain, fileName);
+    try {
+      if (statSync(filePath).isFile()) {
+        return filePath;
+      }
+    } catch {}
+  }
+  return;
+}
+
+function* pathChainToRoot(currentPath: string) {
+  let lastPath: string | undefined;
+  while (lastPath !== currentPath) {
+    yield currentPath;
+    lastPath = currentPath;
+    currentPath = dirname(currentPath);
+  }
+}

src/index.ts

@@ -1,4 +1,5 @@
 export * from './directory-context';
+export * from './find-up';
 export * from './language-helpers';
 export * from './npm-package';
 export * from './yarn-workspaces';