From 82d090b2411853f94909a3c9a0ed3b8bbe1bef11 Mon Sep 17 00:00:00 2001
From: rbong <rbong@users.noreply.github.com>
Date: Mon, 1 Aug 2022 11:12:05 -0400
Subject: [PATCH] feat: add support for `jsconfig.json` (#161)

Co-authored-by: JounQin <admin@1stg.me>
---
 .changeset/neat-glasses-carry.md |  5 +++++
 package.json                     |  1 +
 src/index.ts                     | 11 ++++++++++-
 tests/withJsconfig/.eslintrc.cjs |  5 +++++
 tests/withJsconfig/importee.js   |  1 +
 tests/withJsconfig/index.js      |  2 ++
 tests/withJsconfig/jsconfig.json |  8 ++++++++
 7 files changed, 32 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/neat-glasses-carry.md
 create mode 100644 tests/withJsconfig/.eslintrc.cjs
 create mode 100644 tests/withJsconfig/importee.js
 create mode 100644 tests/withJsconfig/index.js
 create mode 100644 tests/withJsconfig/jsconfig.json

diff --git a/.changeset/neat-glasses-carry.md b/.changeset/neat-glasses-carry.md
new file mode 100644
index 0000000..b37ebea
--- /dev/null
+++ b/.changeset/neat-glasses-carry.md
@@ -0,0 +1,5 @@
+---
+"eslint-import-resolver-typescript": minor
+---
+
+feat: add support for `jsconfig.json`
diff --git a/package.json b/package.json
index 2b0823e..0d4ca8c 100644
--- a/package.json
+++ b/package.json
@@ -82,6 +82,7 @@
     "test": "run-p test:*",
     "test:multipleEslintrcs": "eslint --ext ts,tsx tests/multipleEslintrcs",
     "test:multipleTsconfigs": "eslint --ext ts,tsx tests/multipleTsconfigs",
+    "test:withJsconfig": "eslint --ext js tests/withJsconfig",
     "test:withJsExtension": "node tests/withJsExtension/test.js && eslint --ext ts,tsx tests/withJsExtension",
     "test:withPaths": "eslint --ext ts,tsx tests/withPaths",
     "test:withPathsAndNestedBaseUrl": "eslint --ext ts,tsx tests/withPathsAndNestedBaseUrl",
diff --git a/src/index.ts b/src/index.ts
index 4404230..6ca26a9 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -10,6 +10,7 @@ import {
   ResolverFactory,
 } from 'enhanced-resolve'
 import { createPathsMatcher, getTsconfig } from 'get-tsconfig'
+import type { TsConfigResult } from 'get-tsconfig'
 import isCore from 'is-core-module'
 import isGlob from 'is-glob'
 import { createSyncFn } from 'synckit'
@@ -333,7 +334,15 @@ function initMappers(options: InternalResolverOptions) {
   ]
 
   mappers = projectPaths.map(projectPath => {
-    const tsconfigResult = getTsconfig(projectPath)
+    let tsconfigResult: TsConfigResult | null
+
+    if (isFile(projectPath)) {
+      const { dir, base } = path.parse(projectPath)
+      tsconfigResult = getTsconfig(dir, base)
+    } else {
+      tsconfigResult = getTsconfig(projectPath)
+    }
+
     return tsconfigResult && createPathsMatcher(tsconfigResult)
   })
 
diff --git a/tests/withJsconfig/.eslintrc.cjs b/tests/withJsconfig/.eslintrc.cjs
new file mode 100644
index 0000000..f20d5d2
--- /dev/null
+++ b/tests/withJsconfig/.eslintrc.cjs
@@ -0,0 +1,5 @@
+const path = require('path')
+
+const configPath = path.join(__dirname, 'jsconfig.json')
+
+module.exports = require('../baseEslintConfig.cjs')(configPath)
diff --git a/tests/withJsconfig/importee.js b/tests/withJsconfig/importee.js
new file mode 100644
index 0000000..cb43be0
--- /dev/null
+++ b/tests/withJsconfig/importee.js
@@ -0,0 +1 @@
+export default 'importee'
diff --git a/tests/withJsconfig/index.js b/tests/withJsconfig/index.js
new file mode 100644
index 0000000..7e44c56
--- /dev/null
+++ b/tests/withJsconfig/index.js
@@ -0,0 +1,2 @@
+// import using jsconfig.json path mapping
+import '#/importee'
diff --git a/tests/withJsconfig/jsconfig.json b/tests/withJsconfig/jsconfig.json
new file mode 100644
index 0000000..a06fc56
--- /dev/null
+++ b/tests/withJsconfig/jsconfig.json
@@ -0,0 +1,8 @@
+{
+  "compilerOptions": {
+    "baseUrl": "./",
+    "paths": {
+      "#/*": ["*"]
+    }
+  }
+}