spawn handlebars meta patterns if not found

bmuenzenmeyer · bmuenzenmeyer · commit e5e384a4d567 · 2017-09-17T05:07:56.000-05:00
part of pattern-lab/patternlab-node#611
diff --git a/_meta/_00-head.html b/_meta/_00-head.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html class="{{ htmlClass }}">
+  <head>
+    <title>{{ title }}</title>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width" />
+
+    <link rel="stylesheet" href="../../css/style.css?{{ cacheBuster }}" media="all" />
+    <link rel="stylesheet" href="../../css/pattern-scaffolding.css?{{ cacheBuster }}" media="all" />
+
+    <!-- Begin Pattern Lab (Required for Pattern Lab to run properly) -->
+    {{{ patternLabHead }}}
+    <!-- End Pattern Lab -->
+
+  </head>
+  <body class="{{ bodyClass }}">
diff --git a/_meta/_01-foot.html b/_meta/_01-foot.html
@@ -0,0 +1,6 @@
+
+<!--DO NOT REMOVE-->
+{{{ patternLabFoot }}}
+
+</body>
+</html>
diff --git a/lib/engine_underscore.js b/lib/engine_underscore.js
@@ -1,3 +1,5 @@
+"use strict";
+
 /*
  * underscore pattern engine for patternlab-node - v0.15.1 - 2015
  *
@@ -17,8 +19,8 @@
  *
  */
 
-
-"use strict";
+const fs = require('fs-extra');
+const path = require('path');
 
 var _ = require('underscore');
 
@@ -171,7 +173,34 @@ var engine_underscore = {
     var partialID = partialIDWithQuotes.replace(edgeQuotesMatcher, '');
 
     return partialID;
+  },
+
+  spawnFile: function (config, fileName) {
+    const paths = config.paths;
+    const metaFilePath = path.resolve(paths.source.meta, fileName);
+    try {
+      fs.statSync(metaFilePath);
+    } catch (err) {
+
+      //not a file, so spawn it from the included file
+      const localMetaFilePath = path.resolve(__dirname, '_meta/', fileName);
+      const metaFileContent = fs.readFileSync(path.resolve(__dirname, '..', '_meta/', fileName), 'utf8');
+      fs.outputFileSync(metaFilePath, metaFileContent);
+    }
+  },
+
+  /**
+  * Checks to see if the _meta directory has engine-specific head and foot files,
+  * spawning them if not found.
+  *
+  * @param {object} config - the global config object from core, since we won't
+  * assume it's already present
+  */
+  spawnMeta: function (config) {
+    this.spawnFile(config, '_00-head.html');
+    this.spawnFile(config, '_01-foot.html');
   }
+
 };
 
 module.exports = engine_underscore;
diff --git a/package.json b/package.json
@@ -24,7 +24,8 @@
   "author": "Brian Muenzenmeyer & Geoffrey Pursell",
   "license": "MIT",
   "scripts": {
-    "test": "grunt travis --verbose"
+    "test": "grunt travis --verbose",
+    "lint": "eslint **/*.js"
   },
   "engines": {
     "node": ">=4.0"

-Original file line number
+Diff line change
@@ @@ -0,0 +1,6 @@ @@
++
 +<!--DO NOT REMOVE-->
 +{{{ patternLabFoot }}}
++
 +</body>
 +</html>