spawn mustache meta patterns if not found

bmuenzenmeyer · bmuenzenmeyer · commit fc67592d4d0e · 2017-05-16T12:12:38.000-05:00
part of pattern-lab/patternlab-node#611
diff --git a/_meta/_00-head.mustache b/_meta/_00-head.mustache
@@ -0,0 +1,17 @@
+<!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.mustache b/_meta/_01-foot.mustache
@@ -0,0 +1,6 @@
+
+<!--DO NOT REMOVE-->
+{{{ patternLabFoot }}}
+
+</body>
+</html>
diff --git a/lib/engine_mustache.js b/lib/engine_mustache.js
@@ -1,3 +1,5 @@
+"use strict";
+
 /*
  * mustache pattern engine for patternlab-node - v2.X.X - 2016
  *
@@ -17,10 +19,10 @@
  *
  */
 
-"use strict";
-
-var Mustache = require('mustache');
-var utilMustache = require('./util_mustache');
+const fs = require('fs-extra');
+const path = require('path');
+const Mustache = require('mustache');
+const utilMustache = require('./util_mustache');
 
 // This holds the config from from core. The core has to call
 // usePatternLabConfig() at load time for this to be populated, which
@@ -73,6 +75,20 @@ var engine_mustache = {
     return matches;
   },
 
+  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.
@@ -81,7 +97,8 @@ var engine_mustache = {
   * assume it's already present
   */
   spawnMeta: function (config) {
-
+    this.spawnFile(config, '_00-head.mustache');
+    this.spawnFile(config, '_01-foot.mustache');
   },
 
   // find and return any {{> template-name }} within pattern
diff --git a/package.json b/package.json
@@ -4,6 +4,7 @@
   "version": "1.0.2",
   "main": "lib/engine_mustache.js",
   "dependencies": {
+    "fs-extra": "^0.30.0",
     "mustache": "^2.2.0"
   },
   "devDependencies": {
