Remove deprecated @types/pkg-dir and pkg-dir (#438)

* Remove deprecated @types/pkg-dir and update pkg-dir to v4

* Fix build -> Remove pkg-dir as it is not supported for node 6

Author: mayurkale22

packages/opencensus-exporter-zpages/package-lock.json

@@ -46,7 +46,6 @@
     "@types/extend": "^3.0.0",
     "@types/mocha": "^5.2.5",
     "@types/node": "^10.12.12",
-    "@types/pkg-dir": "^2.0.0",
     "axios": "^0.18.0",
     "codecov": "^3.1.0",
     "gts": "^0.9.0",
@@ -59,7 +58,6 @@
   "dependencies": {
     "@opencensus/core": "^0.0.9",
     "ejs": "^2.5.8",
-    "express": "^4.16.3",
-    "pkg-dir": "^3.0.0"
+    "express": "^4.16.3"
   }
 }

packages/opencensus-exporter-zpages/package.json

@@ -15,13 +15,11 @@
  */
 
 import {AggregationType} from '@opencensus/core';
+import * as ejs from 'ejs';
+import * as path from 'path';
 import {StatsParams} from '../../zpages';
 
-const ejs = require('ejs');
-
-import * as pkgDir from 'pkg-dir';
-const templatesDir = `${pkgDir.sync(__dirname)}/templates`;
-
+const templatesDir = path.join(__dirname, '../../../../templates');
 const FIXED_SIZE = 3;
 
 export interface ZMeasureOrders {
@@ -71,8 +69,7 @@ export class RpczPageHandler {
    */
   emitHtml(json: boolean): string {
     /** template HTML */
-    const rpczFile =
-        ejs.fileLoader(`${templatesDir}/rpcz.ejs`, 'utf8').toString();
+    const rpczFile = ejs.fileLoader(`${templatesDir}/rpcz.ejs`).toString();
     /** CSS styles file */
     const stylesFile =
         ejs.fileLoader(`${templatesDir}/styles.min.css`).toString();

packages/opencensus-exporter-zpages/src/zpages-frontend/page-handlers/rpcz.page-handler.ts

@@ -16,10 +16,9 @@
 
 import {AggregationData, AggregationType, TagKey, TagValue, View} from '@opencensus/core';
 import {StatsParams} from '../../zpages';
-
 const ejs = require('ejs');
 
-import * as pkgDir from 'pkg-dir';
+import * as path from 'path';
 
 export interface StatszParams {
   path: string;
@@ -202,7 +201,7 @@ export class StatszPageHandler {
    * file
    */
   private loaderFile(fileName: string): string {
-    const rootDir = `${pkgDir.sync(__dirname)}`;
-    return ejs.fileLoader(`${rootDir}/templates/${fileName}`, 'utf8');
+    const fileDir = path.join(__dirname, '../../../../templates', fileName);
+    return ejs.fileLoader(fileDir, 'utf8');
   }
 }

packages/opencensus-exporter-zpages/src/zpages-frontend/page-handlers/statsz.page-handler.ts

@@ -17,10 +17,10 @@
 import {SamplerBuilder} from '@opencensus/core';
 import * as tracing from '@opencensus/nodejs';
 import * as ejs from 'ejs';
-import * as pkgDir from 'pkg-dir';
+import * as path from 'path';
 
 // The directory to search for templates.
-const templatesDir = `${pkgDir.sync(__dirname)}/templates`;
+const templatesDir = path.join(__dirname, '../../../../templates');
 
 export interface TraceConfigzParams {
   change: string;

packages/opencensus-exporter-zpages/src/zpages-frontend/page-handlers/traceconfigz.page-handler.ts

@@ -16,12 +16,12 @@
 
 import {RootSpan, Span} from '@opencensus/core';
 import * as ejs from 'ejs';
-import * as pkgDir from 'pkg-dir';
+import * as path from 'path';
 
 import {LatencyBucketBoundaries} from '../latency-bucket-boundaries';
 
 // The directory to search for templates.
-const templatesDir = `${pkgDir.sync(__dirname)}/templates`;
+const templatesDir = path.join(__dirname, '../../../../templates');
 
 export type TracezParams = {
   tracename: string; type: string;