From bbff7403fbf46f9ad92240ac213df8d30ef31b64 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Thu, 20 Sep 2018 02:56:13 +0200
Subject: update packages

---
 node_modules/handlebars/lib/precompiler.js | 43 +++++++++++++++++++++++-------
 1 file changed, 34 insertions(+), 9 deletions(-)

(limited to 'node_modules/handlebars/lib/precompiler.js')

diff --git a/node_modules/handlebars/lib/precompiler.js b/node_modules/handlebars/lib/precompiler.js
index 6ba3800cb..ab3eb201d 100644
--- a/node_modules/handlebars/lib/precompiler.js
+++ b/node_modules/handlebars/lib/precompiler.js
@@ -4,7 +4,7 @@ import fs from 'fs';
 import * as Handlebars from './handlebars';
 import {basename} from 'path';
 import {SourceMapConsumer, SourceNode} from 'source-map';
-import uglify from 'uglify-js';
+
 
 module.exports.loadTemplates = function(opts, callback) {
   loadStrings(opts, function(err, strings) {
@@ -60,7 +60,7 @@ function loadStrings(opts, callback) {
 
 function loadFiles(opts, callback) {
   // Build file extension pattern
-  let extension = (opts.extension || 'handlebars').replace(/[\\^$*+?.():=!|{}\-\[\]]/g, function(arg) { return '\\' + arg; });
+  let extension = (opts.extension || 'handlebars').replace(/[\\^$*+?.():=!|{}\-[\]]/g, function(arg) { return '\\' + arg; });
   extension = new RegExp('\\.' + extension + '$');
 
   let ret = [],
@@ -235,7 +235,6 @@ module.exports.cli = function(opts) {
     }
   }
 
-
   if (opts.map) {
     output.add('\n//# sourceMappingURL=' + opts.map + '\n');
   }
@@ -244,12 +243,7 @@ module.exports.cli = function(opts) {
   output.map = output.map + '';
 
   if (opts.min) {
-    output = uglify.minify(output.code, {
-      fromString: true,
-
-      outSourceMap: opts.map,
-      inSourceMap: JSON.parse(output.map)
-    });
+    output = minify(output, opts.map);
   }
 
   if (opts.map) {
@@ -271,3 +265,34 @@ function arrayCast(value) {
   }
   return value;
 }
+
+/**
+ * Run uglify to minify the compiled template, if uglify exists in the dependencies.
+ *
+ * We are using `require` instead of `import` here, because es6-modules do not allow
+ * dynamic imports and uglify-js is an optional dependency. Since we are inside NodeJS here, this
+ * should not be a problem.
+ *
+ * @param {string} output the compiled template
+ * @param {string} sourceMapFile the file to write the source map to.
+ */
+function minify(output, sourceMapFile) {
+  try {
+    // Try to resolve uglify-js in order to see if it does exist
+    require.resolve('uglify-js');
+  } catch (e) {
+    if (e.code !== 'MODULE_NOT_FOUND') {
+      // Something else seems to be wrong
+      throw e;
+    }
+    // it does not exist!
+    console.error('Code minimization is disabled due to missing uglify-js dependency');
+    return output;
+  }
+  return require('uglify-js').minify(output.code, {
+    sourceMap: {
+      content: output.map,
+      url: sourceMapFile
+    }
+  });
+}
-- 
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