1 files changed, 155 insertions, 0 deletions
diff --git a/thirdparty/systemjs/lib/meta.js b/thirdparty/systemjs/lib/meta.js
new file mode 100644
index 000000000..24e8b38ce
--- /dev/null
+++ b/thirdparty/systemjs/lib/meta.js
@@ -0,0 +1,155 @@
+/*
+ * Meta Extension
+ *
+ * Sets default metadata on a load record (load.metadata) from
+ * loader.metadata via SystemJS.meta function.
+ *
+ *
+ * Also provides an inline meta syntax for module meta in source.
+ *
+ * Eg:
+ *
+ * loader.meta({
+ *   'my/module': { deps: ['jquery'] }
+ *   'my/*': { format: 'amd' }
+ * });
+ *
+ * Which in turn populates loader.metadata.
+ *
+ * load.metadata.deps and load.metadata.format will then be set
+ * for 'my/module'
+ *
+ * The same meta could be set with a my/module.js file containing:
+ *
+ * my/module.js
+ *   "format amd";
+ *   "deps[] jquery";
+ *   "globals.some value"
+ *   console.log('this is my/module');
+ *
+ * Configuration meta always takes preference to inline meta.
+ *
+ * Multiple matches in wildcards are supported and ammend the meta.
+ *
+ *
+ * The benefits of the function form is that paths are URL-normalized
+ * supporting say
+ *
+ * loader.meta({ './app': { format: 'cjs' } });
+ *
+ * Instead of needing to set against the absolute URL (https://site.com/app.js)
+ *
+ */
+
+(function() {
+
+  hookConstructor(function(constructor) {
+    return function() {
+      this.meta = {};
+      constructor.call(this);
+    };
+  });
+
+  hook('locate', function(locate) {
+    return function(load) {
+      var meta = this.meta;
+      var name = load.name;
+
+      // NB for perf, maybe introduce a fast-path wildcard lookup cache here
+      // which is checked first
+
+      // apply wildcard metas
+      var bestDepth = 0;
+      var wildcardIndex;
+      for (var module in meta) {
+        wildcardIndex = module.indexOf('*');
+        if (wildcardIndex === -1)
+          continue;
+        if (module.substr(0, wildcardIndex) === name.substr(0, wildcardIndex)
+            && module.substr(wildcardIndex + 1) === name.substr(name.length - module.length + wildcardIndex + 1)) {
+          var depth = module.split('/').length;
+          if (depth > bestDepth)
+            bestDepth = depth;
+          extendMeta(load.metadata, meta[module], bestDepth != depth);
+        }
+      }
+
+      // apply exact meta
+      if (meta[name])
+        extendMeta(load.metadata, meta[name]);
+
+      return locate.call(this, load);
+    };
+  });
+
+  // detect any meta header syntax
+  // only set if not already set
+  var metaRegEx = /^(\s*\/\*[^\*]*(\*(?!\/)[^\*]*)*\*\/|\s*\/\/[^\n]*|\s*"[^"]+"\s*;?|\s*'[^']+'\s*;?)+/;
+  var metaPartRegEx = /\/\*[^\*]*(\*(?!\/)[^\*]*)*\*\/|\/\/[^\n]*|"[^"]+"\s*;?|'[^']+'\s*;?/g;
+
+  function setMetaProperty(target, p, value) {
+    var pParts = p.split('.');
+    var curPart;
+    while (pParts.length > 1) {
+      curPart = pParts.shift();
+      target = target[curPart] = target[curPart] || {};
+    }
+    curPart = pParts.shift();
+    if (!(curPart in target))
+      target[curPart] = value;
+  }
+
+  hook('translate', function(translate) {
+    return function(load) {
+      // shortpath for bundled
+      if (load.metadata.format == 'defined') {
+        load.metadata.deps = load.metadata.deps || [];
+        return Promise.resolve(load.source);
+      }
+
+      // NB meta will be post-translate pending transpiler conversion to plugins
+      var meta = load.source.match(metaRegEx);
+      if (meta) {
+        var metaParts = meta[0].match(metaPartRegEx);
+
+        for (var i = 0; i < metaParts.length; i++) {
+          var curPart = metaParts[i];
+          var len = curPart.length;
+
+          var firstChar = curPart.substr(0, 1);
+          if (curPart.substr(len - 1, 1) == ';')
+            len--;
+
+          if (firstChar != '"' && firstChar != "'")
+            continue;
+
+          var metaString = curPart.substr(1, curPart.length - 3);
+          var metaName = metaString.substr(0, metaString.indexOf(' '));
+
+          if (metaName) {
+            var metaValue = metaString.substr(metaName.length + 1, metaString.length - metaName.length - 1);
+
+            if (metaName.substr(metaName.length - 2, 2) == '[]') {
+              metaName = metaName.substr(0, metaName.length - 2);
+              load.metadata[metaName] = load.metadata[metaName] || [];
+              load.metadata[metaName].push(metaValue);
+            }
+            else if (load.metadata[metaName] instanceof Array) {
+              // temporary backwards compat for previous "deps" syntax
+              warn.call(this, 'Module ' + load.name + ' contains deprecated "deps ' + metaValue + '" meta syntax.\nThis should be updated to "deps[] ' + metaValue + '" for pushing to array meta.');
+              load.metadata[metaName].push(metaValue);
+            }
+            else {
+              setMetaProperty(load.metadata, metaName, metaValue);
+            }
+          }
+          else {
+            load.metadata[metaString] = true;
+          }
+        }
+      }
+
+      return translate.apply(this, arguments);
+    };
+  });
+})();