From 0f68c45a9c4c763131117dc86b537349434e2299 Mon Sep 17 00:00:00 2001
From: Michael Zugelder <michael@zugelder.org>
Date: Wed, 23 Mar 2022 22:44:06 +0100
Subject: [PATCH] fix: support async loaders with lilconfig.search (#29)

---
 src/index.ts           |  4 ++--
 src/spec/index.spec.ts | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+), 2 deletions(-)

diff --git a/src/index.ts b/src/index.ts
index 68e23b0..eeab334 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -211,7 +211,7 @@ export function lilconfig(
 
                 // handle package.json
                 if (fileName === 'package.json') {
-                    const pkg = loader(filepath, content);
+                    const pkg = await loader(filepath, content);
                     const maybeConfig = getPackageProp(packageProp, pkg);
                     if (maybeConfig != null) {
                         result.config = maybeConfig;
@@ -231,7 +231,7 @@ export function lilconfig(
                     result.config = undefined;
                 } else {
                     validateLoader(loader, loaderKey);
-                    result.config = loader(filepath, content);
+                    result.config = await loader(filepath, content);
                 }
                 result.filepath = filepath;
                 break;
diff --git a/src/spec/index.spec.ts b/src/spec/index.spec.ts
index 46064f6..770f588 100644
--- a/src/spec/index.spec.ts
+++ b/src/spec/index.spec.ts
@@ -76,6 +76,42 @@ describe('options', () => {
                 expect(ccResult).toEqual(expected);
             });
         });
+
+        describe('async loaders', () => {
+            const config = {data: 42};
+            const options = {
+                loaders: {'.js': async () => config},
+            };
+
+            it('async load', async () => {
+                const filepath = path.join(__dirname, 'load', 'test-app.js');
+
+                const result = await lilconfig('test-app', options).load(
+                    filepath,
+                );
+                const ccResult = await cosmiconfig('test-app', options).load(
+                    filepath,
+                );
+
+                expect(result).toEqual({config, filepath});
+                expect(ccResult).toEqual({config, filepath});
+            });
+
+            it('async search', async () => {
+                const searchPath = path.join(__dirname, 'search');
+                const filepath = path.join(searchPath, 'test-app.config.js');
+
+                const result = await lilconfig('test-app', options).search(
+                    searchPath,
+                );
+                const ccResult = await cosmiconfig('test-app', options).search(
+                    searchPath,
+                );
+
+                expect(result).toEqual({config, filepath});
+                expect(ccResult).toEqual({config, filepath});
+            });
+        });
     });
 
     describe('transform', () => {