revert: "fix(@schematics/update): use rc to find and read npm config"

This reverts commit 7662b8d.

Author: hansl

package.json

@@ -113,7 +113,6 @@
     "postcss-url": "^7.3.2",
     "protractor": "~5.4.0",
     "raw-loader": "^0.5.1",
-    "rc": "^1.2.8",
     "rxjs": "^6.0.0",
     "sass-loader": "~6.0.7",
     "semver": "^5.3.0",

packages/schematics/update/package.json

@@ -18,7 +18,6 @@
     "npm-registry-client": "^8.5.1",
     "semver": "^5.3.0",
     "semver-intersect": "^1.1.2",
-    "rc": "^1.2.8",
     "rxjs": "^6.0.0"
   }
 }

packages/schematics/update/update/npm.ts

@@ -6,21 +6,18 @@
  * found in the LICENSE file at https://angular.io/license
  */
 import { logging } from '@angular-devkit/core';
+import { exec } from 'child_process';
 import { readFileSync } from 'fs';
 import { Observable, ReplaySubject, concat, of } from 'rxjs';
 import { concatMap, defaultIfEmpty, filter, first, map, toArray } from 'rxjs/operators';
 import * as url from 'url';
 import { NpmRepositoryPackageJson } from './npm-package-json';
 
 const RegistryClient = require('npm-registry-client');
-const rc = require('rc');
 
 const npmPackageJsonCache = new Map<string, Observable<NpmRepositoryPackageJson>>();
 const npmConfigOptionCache = new Map<string, Observable<string | undefined>>();
 
-
-const npmConfig = rc('npm', {}, {});
-
 function getNpmConfigOption(
   option: string,
   scope?: string,
@@ -46,15 +43,26 @@ function getNpmConfigOption(
 
   const subject = new ReplaySubject<string | undefined>(1);
 
-  const optionValue = npmConfig && npmConfig[fullOption];
-  if (optionValue == undefined || optionValue == null) {
+  try {
+    exec(`npm get ${fullOption}`, (error, data) => {
+      if (error) {
+        subject.next();
+      } else {
+        data = data.trim();
+        if (!data || data === 'undefined' || data === 'null') {
+          subject.next();
+        } else {
+          subject.next(data);
+        }
+      }
+
+      subject.complete();
+    });
+  } catch {
     subject.next();
-  } else {
-    subject.next(optionValue);
+    subject.complete();
   }
 
-  subject.complete();
-
   value = subject.asObservable();
   npmConfigOptionCache.set(fullOption, value);