feat: dirname and filename support

Author: Novout

scripts/build.js

@@ -9,6 +9,7 @@ const stdlib = require('node-stdlib-browser')
 const importPath = require('./esbuild-import-path')
 const correctSet = require('./esbuild-correct-set')
 const vendorSourceMap = require('./esbuild-vendor-sourcemap')
+const dirnameAndFilenameSupport = require('./esbuild-dirname-and-filename')
 
 const client = () => {
   const make = async (format) => {
@@ -45,6 +46,7 @@ const client = () => {
         importPath,
         correctSet,
         vendorSourceMap,
+        dirnameAndFilenameSupport
       ],
       external: ['fontkit-next'],
     })
@@ -79,6 +81,7 @@ const node = () => {
         importPath,
         correctSet,
         vendorSourceMap,
+        dirnameAndFilenameSupport
       ],
       external: ['fontkit-next', 'pdfkit'], // TODO: Remove external pdfkit
     })

scripts/esbuild-dirname-and-filename.js

@@ -0,0 +1,24 @@
+const fs = require("fs");
+const path = require("path");
+
+const nodeModules = new RegExp(/^(?:.*[\\\/])?node_modules(?:[\\\/].*)?$/);
+
+module.exports = {
+  name: "dirname",
+  setup(build) {
+    build.onLoad({ filter: /.*/ }, ({ path: filePath }) => {
+      if (!filePath.match(nodeModules)) {
+        let contents = fs.readFileSync(filePath, "utf8");
+        const loader = path.extname(filePath).substring(1);
+        const dirname = path.dirname(filePath);
+        contents = contents
+          .replace("__dirname", `"${dirname}"`)
+          .replace("__filename", `"${filePath}"`);
+        return {
+          contents,
+          loader,
+        };
+      }
+    });
+  },
+};