Merge commit '9af485a584e47fd503ed5c62b9f6482574715f1e' as 'thirdparty/systemjs'

1 files changed, 70 insertions, 0 deletions

diff --git a/thirdparty/systemjs/lib/global.js b/thirdparty/systemjs/lib/global.js
new file mode 100644
index 000000000..b86a4d045
--- /dev/null
+++ b/thirdparty/systemjs/lib/global.js
@@ -0,0 +1,70 @@
+/*
+  SystemJS Global Format
+
+  Supports
+    metadata.deps
+    metadata.globals
+    metadata.exports
+
+  Without metadata.exports, detects writes to the global object.
+*/
+var __globalName = typeof self != 'undefined' ? 'self' : 'global';
+
+hook('fetch', function(fetch) {
+  return function(load) {
+    if (load.metadata.exports && !load.metadata.format)
+      load.metadata.format = 'global';
+    return fetch.call(this, load);
+  };
+});
+
+// ideally we could support script loading for globals, but the issue with that is that
+// we can't do it with AMD support side-by-side since AMD support means defining the
+// global define, and global support means not definining it, yet we don't have any hook
+// into the "pre-execution" phase of a script tag being loaded to handle both cases
+hook('instantiate', function(instantiate) {
+  return function(load) {
+    var loader = this;
+
+    if (!load.metadata.format)
+      load.metadata.format = 'global';
+
+    // global is a fallback module format
+    if (load.metadata.format == 'global' && !load.metadata.entry) {
+
+      var entry = createEntry();
+
+      load.metadata.entry = entry;
+
+      entry.deps = [];
+
+      for (var g in load.metadata.globals) {
+        var gl = load.metadata.globals[g];
+        if (gl)
+          entry.deps.push(gl);
+      }
+
+      entry.execute = function(require, exports, module) {
+
+        var globals;
+        if (load.metadata.globals) {
+          globals = {};
+          for (var g in load.metadata.globals)
+            if (load.metadata.globals[g])
+              globals[g] = require(load.metadata.globals[g]);
+        }
+        
+        var exportName = load.metadata.exports;
+
+        if (exportName)
+          load.source += '\n' + __globalName + '["' + exportName + '"] = ' + exportName + ';';
+
+        var retrieveGlobal = loader.get('@@global-helpers').prepareGlobal(module.id, exportName, globals, !!load.metadata.encapsulateGlobal);
+        __exec.call(loader, load);
+
+        return retrieveGlobal();
+      }
+    }
+    return instantiate.call(this, load);
+  };
+});