fix(@angular/cli): remove analytics prompt postinstall script

With this change we remove the postinstall hook that was used to prompt users to confirm if they'd like to share anonymous usage with the Angular team.

This post install hook was used to set the global configuration, which was mainly used for commands that run outside of a workspace such as `ng new`, `ng version` and ng `config`. We now prompt once the users runs the above mentioned commands instead of the post install.

Author: alan-agius4

packages/angular/cli/bin/postinstall/analytics-prompt.js

@@ -11,9 +11,6 @@
     "angular-cli",
     "Angular CLI"
   ],
-  "scripts": {
-    "postinstall": "node ./bin/postinstall/script.js"
-  },
   "repository": {
     "type": "git",
     "url": "https://github.com/angular/angular-cli.git"

packages/angular/cli/bin/postinstall/script.js

@@ -250,26 +250,26 @@ export async function createAnalytics(
   }
 
   let config = globalConfig;
-  // Not disabled globally, check locally.
-  if (workspace) {
-    let localConfig = await getAnalytics('local');
-    if (localConfig === undefined) {
+  // Not disabled globally, check locally or not set globally and command is run outside of workspace example: `ng new`
+  if (workspace || globalConfig === undefined) {
+    const level = workspace ? 'local' : 'global';
+    let localOrGlobalConfig = await getAnalytics(level);
+    if (localOrGlobalConfig === undefined) {
       if (!skipPrompt) {
-        // local is not unset, prompt user.
-
+        // config is unset, prompt user.
         // TODO: This should honor the `no-interactive` option.
         // It is currently not an `ng` option but rather only an option for specific commands.
         // The concept of `ng`-wide options are needed to cleanly handle this.
-        await promptAnalytics(false);
-        localConfig = await getAnalytics('local');
+        await promptAnalytics(!workspace /** global */);
+        localOrGlobalConfig = await getAnalytics(level);
       }
     }
 
-    if (localConfig instanceof analytics.NoopAnalytics) {
-      return localConfig;
-    } else if (localConfig) {
+    if (localOrGlobalConfig instanceof analytics.NoopAnalytics) {
+      return localOrGlobalConfig;
+    } else if (localOrGlobalConfig) {
       // Favor local settings over global when defined.
-      config = localConfig;
+      config = localOrGlobalConfig;
     }
   }