Merge pull request #2 from frankleng/support_tsc_comments

support comments in tsconfig.json

README.md

@@ -1,7 +1,22 @@
 # esbuild-ts-paths
 Transform TS path alias to absolute paths for esbuild
+###Example
+```javascript
+// tsconfig.json
+
+"compilerOptions": {
+  "outDir": "./dist",
+    "baseUrl": ".",
+    "paths": {
+    "@common/*": ["../common/*"], // asterisks are important
+    "@shared/*": ["./src/shared/*"]
+  }
+}
+
+```
 
 ```javascript
+// esbuild
 const tsPaths = require("esbuild-ts-paths") 
 esbuild.build({
     //...
@@ -12,3 +27,4 @@ esbuild.build({
     ]
 })
 ```
+

index.js

@@ -1,8 +1,18 @@
 const { sync: glob } = require("fast-glob");
 const path = require("path");
+const fs = require('fs');
+
+function stripJsonComments (data) {
+  const re = new RegExp("\/\/(.*)","g");
+  return data.replace(re,'');
+}
+
+module.exports = (relativeTsconfigPath = './tsconfig.json') => {
+  const absTsconfigPath = path.resolve(process.cwd(), relativeTsconfigPath);
+  let tsconfigData = fs.readFileSync(absTsconfigPath, 'utf8');
+  tsconfigData = stripJsonComments(tsconfigData);
+  const {compilerOptions} = JSON.parse(tsconfigData);
 
-module.exports = (tsconfigPath = './tsconfig.json') => {
-  const { compilerOptions } = require(path.resolve(process.cwd(), tsconfigPath));
   const pathKeys = Object.keys(compilerOptions.paths);
   const re = new RegExp(`^(${pathKeys.join("|")})`);
   return {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "esbuild-ts-paths",
-  "version": "1.0.3",
+  "version": "1.0.4",
   "description": "Transform TS path alias to absolute paths for esbuild",
   "main": "index.js",
   "repository": "git@github.com:frankleng/esbuild-ts-paths.git",