fix(no-missing-import): Resolve tsconfig paths relative to the tsconfig (#343)

* test: Add failing test for 314

* fix: Resolve tsconfig paths relative to the tsconfig

Author: scagood

lib/util/import-target.js

@@ -44,13 +44,15 @@ function getTSConfigAliases(context) {
 
     const paths = tsConfig?.config?.compilerOptions?.paths
 
-    if (paths == null) {
+    if (tsConfig?.path == null || paths == null) {
         return
     }
 
     return Object.entries(paths).map(([name, alias]) => ({
         name: removeTrailWildcard(name),
-        alias: removeTrailWildcard(alias),
+        alias: removeTrailWildcard(alias).map(relative =>
+            resolve(tsConfig.path, "..", relative)
+        ),
     }))
 }
 

tests/fixtures/no-missing/issue-314/module/index.ts

@@ -0,0 +1,5 @@
+function x() {
+  return true;
+}
+
+export default x;

tests/fixtures/no-missing/issue-314/src/example.ts

@@ -0,0 +1,13 @@
+{
+    "compilerOptions": {
+        "baseUrl": "./src/",
+        "module": "node16",
+        "target": "es2022",
+        "moduleResolution": "node16",
+        "paths": {
+            "@module": ["./module/index.ts"]
+        },
+        "strict": true
+    },
+    "include": ["src", "module"]
+}

tests/fixtures/no-missing/issue-314/tsconfig.json

@@ -306,6 +306,14 @@ ruleTester.run("no-missing-import", rule, {
             filename: fixture("ts-paths/test.ts"),
             code: "import before from '@wild/where.js';",
         },
+        {
+            // name: "tsconfig - compilerOptions.paths - direct reference",
+            filename: fixture("issue-314/src/example.ts"),
+            code: "import('@module');",
+            languageOptions: {
+                ecmaVersion: "latest",
+            },
+        },
 
         {
             // name: 'Ensure type only packages can be imported',