REFA,CHORE: introducing module bundling

generate_single_file.js

@@ -37,11 +37,13 @@ class OAO {
     }
 }
 
-const copyright_disclaimer = `/*
+const copyright_disclaimer = `
+/**
  * This file is part of the jps-like-websites lib
  * URL: https://git.labos.goip.de/chris/jpc-like-websites
  * @copyright by its creator Christian Martin 
  */ 
+
 `;
 
 let fileOrder = Object.assign(new OAO(), require('./fileOrder.json'));
@@ -118,20 +120,45 @@ function resolveDependencyOrder(oao) {
 }
 
 
-function appendContent(srcFile, targetFile) {
-    return fs.readFile(srcFile, 'utf8')
-        .then(content => {
-            console.log(`Processing '${srcFile}'`);
-            console.log(`           READ: successfully!`)
-            console.log(`           Attepting to append`);
-            return fs.appendFile(targetFile, content);
-        })
-        .then(() => {
-            console.log(`           Append/Write: successfully!`);
-        })
-        .catch(error => {
-            console.error(`Error reading/writing files: ${error.message}`);
-        })
+/**
+ * 
+ * @param {string} srcFile path to src file
+ * @param {string} targetFile path of target file that will contain all scripts
+ */
+async function appendContent(srcFile, targetFile) {
+    try {
+        let content = await fs.readFile(srcFile, 'utf8');
+        console.log(`Processing '${srcFile}'`);
+        console.log(`           READ: successfully!`);
+        console.log(`           Adding Copyright disclaimer!`);
+        console.log(`           Attepting to append to default script variant`);
+
+        content = [
+            ...copyright_disclaimer.split('\r\n'),
+            ...content.split('\r\n')
+        ];
+        await fs.appendFile(targetFile, content.join('\r\n'));
+
+        console.log(`           Adding export to "modulize"!`);
+        /**
+         * Checks weither the given line starts with any of the exportable values.
+         * @param {string} line
+         * @returns {boolean}
+        */
+        const isExpStarter = line => ["function", "const", "let", "class"].some(starter => line.startsWith(starter));
+        console.log(`           Attepting to append to module variant`);
+
+        await fs.appendFile(
+            targetFileModule,
+            content
+                .map(l => (isExpStarter(l) ? "export " : "") + l)
+                .join('\r\n')
+        );
+
+        console.log(`           Append/Write: successfully!`);
+    } catch (error) {
+        console.error(`Error reading/writing files: ${error.message}`);
+    }
 }
 
 
@@ -150,14 +177,16 @@ let orderedJoinList = fileOrder.keys
 
 
 const targetFile = "./jpc-like-websites.js";
+const targetFileModule = "./jpc-like-websites.module.js";
 console.log("(Re-) Creating target file: '" + targetFile + "'");
 
 
 /* EMPTY (create?) TARGET FILE */
-fs.writeFile(targetFile, "", err => { })
+fs.writeFile(targetFile, "", err => { });
+fs.writeFile(targetFileModule, "", err => { });
 
 orderedJoinList
     .reduce((prevPromise, filePath) => prevPromise
-    .then(
-        ()=>appendContent(filePath, targetFile)
-    ), Promise.resolve())
+        .then(
+            () => appendContent(filePath, targetFile)
+        ), Promise.resolve())