fix(@angular/cli): Fixing set prefix issue (#5301)

packages/@angular/cli/commands/set.ts

@@ -64,7 +64,7 @@ const SetCommand = Command.extend({
         case 'number': value = this.asNumber(rawValue); break;
         case 'string': value = rawValue; break;
 
-        default: value = JSON.parse(rawValue);
+        default: value = parseValue(rawValue, jsonPath);
       }
 
       config.set(jsonPath, value);
@@ -74,4 +74,12 @@ const SetCommand = Command.extend({
   }
 });
 
+function parseValue(rawValue: string, path: string) {
+  try {
+    return JSON.parse(rawValue);
+  } catch (error) {
+    throw new SilentError(`No node found at path ${path}`);
+  }
+}
+
 export default SetCommand;

packages/@ngtools/json-schema/src/schema-class-factory.ts

@@ -51,7 +51,13 @@ function _getSchemaNodeForPath<T>(rootMetaData: SchemaTreeNode<T>,
   let fragments = _parseJsonPath(path);
   // TODO: make this work with union (oneOf) schemas
   return fragments.reduce((md: SchemaTreeNode<any>, current: string) => {
-    return md && md.children && md.children[current];
+    if (md && md.children) {
+      return md.children[current];
+    } else if (md && md.items) {
+      return md.items[parseInt(current, 10)];
+    } else {
+      return md;
+    }
   }, rootMetaData);
 }
 

tests/e2e/tests/commands/get/get.ts

@@ -0,0 +1,13 @@
+import {ng} from '../../../utils/process';
+import {expectToFail} from '../../../utils/utils';
+
+export default function() {
+  return Promise.resolve()
+    .then(() => expectToFail(() => ng('get', 'apps.zzz.prefix')))
+    .then(() => ng('get', 'apps.0.prefix'))
+    .then(({ stdout }) => {
+      if (!stdout.match(/app/)) {
+        throw new Error(`Expected "app", received "${JSON.stringify(stdout)}".`);
+      }
+    });
+}

tests/e2e/tests/commands/set/set.ts

@@ -0,0 +1,14 @@
+import {ng} from '../../../utils/process';
+import {expectToFail} from '../../../utils/utils';
+
+export default function() {
+  return Promise.resolve()
+    .then(() => expectToFail(() => ng('set', 'apps.zzz.prefix')))
+    .then(() => ng('set', 'apps.0.prefix' , 'new-prefix'))
+    .then(() => ng('get', 'apps.0.prefix'))
+    .then(({ stdout }) => {
+      if (!stdout.match(/new-prefix/)) {
+        throw new Error(`Expected "new-prefix", received "${JSON.stringify(stdout)}".`);
+      }
+    });
+}