Remove react and add preact (adobe#13608)

* Add Preact library

* Change react to preact

* Fix problems caused by replacing react with preact

* Add Preact test utils and dependencies

* Change requires from react to preact in FileTreeView-test

* Fix problems caused by replacing react test utils with preact test utils

* Remove react

* Make findRenderedDOMComponentWithTag function as helper function

* Find and Replace react with preact

* Make preact, preact-compat, preact-test-utils as node_modules

* Change preact-compat dependency to point to adobe's fork

.gitignore

@@ -13,6 +13,11 @@ Thumbs.db
 # ignore files copied from node_modules to src/thirdparty
 /src/thirdparty/CodeMirror
 /src/thirdparty/less.min.js
+/src/thirdparty/preact
+/src/thirdparty/preact-compat
+/src/thirdparty/preact-test-utils
+/src/thirdparty/simulate-event
+/src/thirdparty/xtend
 
 # ignore compiled files
 /dist

Gruntfile.js

@@ -141,13 +141,41 @@ module.exports = function (grunt) {
                             'less/dist/less.min.js'
                         ]
                     },
+                    {
+                        expand: true,
+                        flatten: true,
+                        dest: 'src/thirdparty/preact-compat',
+                        cwd: 'src/node_modules/preact-compat',
+                        src: [
+                            'dist/preact-compat.min.js'
+                        ]
+                    },
+                    {
+                        expand: true,
+                        flatten: true,
+                        dest: 'src/thirdparty/simulate-event',
+                        cwd: 'src/node_modules/simulate-event',
+                        src: [
+                            'simulate-event.js'
+                        ]
+                    },
+                    {
+                        expand: true,
+                        flatten: true,
+                        dest: 'src/thirdparty/xtend',
+                        cwd: 'src/node_modules/xtend',
+                        src: [
+                            'mutable.js',
+                            'immutable.js'
+                        ]
+                    },
                     {
                         expand: true,
                         dest: 'src/thirdparty/acorn',
                         cwd: 'src/node_modules/acorn',
                         src: [
                             'dist/{,*/}*'
-                        ]
+                          ]
                     }
                 ]
             }

src/main.js

@@ -29,16 +29,16 @@ require.config({
     paths: {
         "text"              : "thirdparty/text/text",
         "i18n"              : "thirdparty/i18n/i18n",
-        "react"             : "thirdparty/react",
 
         // The file system implementation. Change this value to use different
         // implementations (e.g. cloud-based storage).
-        "fileSystemImpl"    : "filesystem/impls/appshell/AppshellFileSystem"
+        "fileSystemImpl"    : "filesystem/impls/appshell/AppshellFileSystem",
+        "preact-compat"     : "thirdparty/preact-compat/preact-compat.min",
+        "preact"            : "thirdparty/preact/preact"
     },
     map: {
         "*": {
-            "thirdparty/CodeMirror2": "thirdparty/CodeMirror",
-            "thirdparty/react":       "react"
+            "thirdparty/CodeMirror2": "thirdparty/CodeMirror"
         }
     }
 });

src/package.json

@@ -3,6 +3,9 @@
   "dependencies": {
     "acorn": "5.1.1",
     "codemirror": "5.28.0",
-    "less": "2.7.2"
+    "less": "2.7.2",
+    "preact": "8.2.1",
+    "preact-test-utils": "0.1.3",
+    "preact-compat": "adobe/preact-compat"
   }
 }