From f1cc41a059b71175196473d839ae276d7f101f70 Mon Sep 17 00:00:00 2001
From: Hiroki Osame <hiroki.osame@gmail.com>
Date: Fri, 15 Sep 2023 00:14:23 +0900
Subject: [PATCH] wip

---
 src/index.ts                                     | 4 ++--
 tests/fixtures/tsconfig/src/paths-slash-match.ts | 3 +++
 tests/fixtures/tsconfig/tsconfig.json            | 3 ++-
 tests/index.ts                                   | 2 +-
 tests/specs/typescript/tsconfig.ts               | 7 +++++++
 5 files changed, 15 insertions(+), 4 deletions(-)
 create mode 100644 tests/fixtures/tsconfig/src/paths-slash-match.ts

diff --git a/src/index.ts b/src/index.ts
index 5ce9fc8..5c68efb 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -16,7 +16,7 @@ import {
 } from 'get-tsconfig';
 import type { TransformOptions } from 'esbuild';
 
-const isPathPattern = /^\.{0,2}\//;
+const isRelativePathPattern = /^\.{1,2}\//;
 const isTsFilePatten = /\.[cm]?tsx?$/;
 const nodeModulesPath = `${path.sep}node_modules${path.sep}`;
 
@@ -158,7 +158,7 @@ Module._resolveFilename = function (request, parent, isMain, options) {
 		tsconfigPathsMatcher
 
 		// bare specifier
-		&& !isPathPattern.test(request)
+		&& !isRelativePathPattern.test(request)
 
 		// Dependency paths should not be resolved using tsconfig.json
 		&& !parent?.filename?.includes(nodeModulesPath)
diff --git a/tests/fixtures/tsconfig/src/paths-slash-match.ts b/tests/fixtures/tsconfig/src/paths-slash-match.ts
new file mode 100644
index 0000000..c906c5a
--- /dev/null
+++ b/tests/fixtures/tsconfig/src/paths-slash-match.ts
@@ -0,0 +1,3 @@
+import value from '/nested-resolve-target';
+
+console.log(value);
diff --git a/tests/fixtures/tsconfig/tsconfig.json b/tests/fixtures/tsconfig/tsconfig.json
index 9d0c412..ea35d97 100644
--- a/tests/fixtures/tsconfig/tsconfig.json
+++ b/tests/fixtures/tsconfig/tsconfig.json
@@ -7,7 +7,8 @@
 		"paths": {
 			"paths-exact-match": ["resolve-target"],
 			"p/*": ["utils/*"],
-			"*/s": ["utils/*"]
+			"*/s": ["utils/*"],
+			"/*": ["utils/*"]
 		},
 	},
 }
diff --git a/tests/index.ts b/tests/index.ts
index 8776334..1f8e3fd 100644
--- a/tests/index.ts
+++ b/tests/index.ts
@@ -2,7 +2,6 @@ import { describe } from 'manten';
 import { createNode } from './utils/node-with-loader.js';
 
 const nodeVersions = [
-	'18',
 	'20',
 	...(
 		process.env.CI
@@ -12,6 +11,7 @@ const nodeVersions = [
 				'14',
 				'16',
 				'17',
+				'18',
 			]
 			: []
 	),
diff --git a/tests/specs/typescript/tsconfig.ts b/tests/specs/typescript/tsconfig.ts
index bf434ce..6b71f9a 100644
--- a/tests/specs/typescript/tsconfig.ts
+++ b/tests/specs/typescript/tsconfig.ts
@@ -143,6 +143,13 @@ export default testSuite(async ({ describe }, node: NodeApis) => {
 				expect(nodeProcess.stdout).toBe('nested-resolve-target');
 			});
 
+			test('resolves paths slash prefix', async () => {
+				const nodeProcess = await node.load('./src/paths-slash-match.ts', {
+					cwd: './tsconfig',
+				});
+				expect(nodeProcess.stdout).toBe('nested-resolve-target');
+			});
+
 			test('resolves paths suffix', async () => {
 				const nodeProcess = await node.load('./src/paths-suffix-match.ts', {
 					cwd: './tsconfig',