From 3155a4e3353cdb5493eff05af229c3a922b00201 Mon Sep 17 00:00:00 2001
From: Roger Bongers <r.l.bongers@gmail.com>
Date: Mon, 1 Aug 2022 10:13:41 -0400
Subject: [PATCH] Add support for jsconfig.json (#73)

---
 package.json                     |  1 +
 src/index.ts                     | 10 +++++++++-
 tests/withJsconfig/.eslintrc.cjs |  5 +++++
 tests/withJsconfig/importee.js   |  1 +
 tests/withJsconfig/index.js      |  2 ++
 tests/withJsconfig/jsconfig.json |  8 ++++++++
 6 files changed, 26 insertions(+), 1 deletion(-)
 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/package.json b/package.json
index a7c1ee6..0806f33 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..30700df 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -333,7 +333,15 @@ function initMappers(options: InternalResolverOptions) {
   ]
 
   mappers = projectPaths.map(projectPath => {
-    const tsconfigResult = getTsconfig(projectPath)
+    let tsconfigResult
+
+    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": {
+      "#/*": ["*"]
+    }
+  }
+}