bin/postcss in jekyll-postcss-0.3.0 vs bin/postcss in jekyll-postcss-0.3.1

@@ -1,31 +1,50 @@
 #!/usr/bin/env node
 
-const postcss = require(require.resolve("postcss", {paths: [process.cwd()]}));
+const postcss = require(require.resolve("postcss", { paths: [process.cwd()] }));
 const config = require(`${process.cwd()}/postcss.config.js`);
 const net = require("net");
 
-const server = net.createServer((c) => {
-  c.on('data', (data) => {
+class PostCSS {
+  static process(data, write) {
     postcss(config.plugins)
-      .process(JSON.parse(data).raw_content, {from: "stdin"})
-      .then(result => {
-        const packet = { compiled_css: result.toString() };
-        c.write(`${JSON.stringify(packet)}\n`);
+      .process(JSON.parse(data).raw_content, { from: "stdin" })
+      .then((result) => write(result))
+      .catch((error) => {
+        console.error("PostCSS Error!\n");
+        console.error(error.toString());
+      });
+  }
 
-        return;
-      })
-      .catch(error => {
-        console.log("PostCSS Error!\n");
-        console.log(error.toString());
+  static startServer() {
+    const server = net.createServer((c) => {
+      c.on("data", (data) => {
+        this.process(data, function (result) {
+          const packet = { compiled_css: result.toString() };
+
+          c.write(`${JSON.stringify(packet)}\n`);
+        });
       });
-  });
-});
+    });
 
-server.on('error', (err) => {
-  console.log("PostCSS Server Error!\n");
-  throw err;
-});
+    server.on("error", (err) => {
+      console.error("PostCSS Server Error!\n");
+      throw err;
+    });
 
-server.listen(8124, () => {
-  console.log("PostCSS Server listening on port 8124...");
-});
+    server.listen(8124, () => {
+      console.log("PostCSS Server listening on port 8124...");
+    });
+  }
+}
+
+switch (process.argv[2]) {
+  case "--development":
+    PostCSS.startServer();
+    break;
+  default:
+    PostCSS.process(process.argv[2], function (result) {
+      const packet = { compiled_css: result.toString() };
+
+      process.stdout.write(`${JSON.stringify(packet)}`);
+    });
+}