refactor: use @pnpm/read-package-json

package.json

@@ -37,11 +37,10 @@
     "@pnpm/logger": "^1.0.0 || ^2.0.0"
   },
   "dependencies": {
+    "@pnpm/read-package-json": "^1.0.0",
     "@pnpm/types": "^1.7.0",
     "npm-lifecycle": "^2.0.1",
-    "path-exists": "^3.0.0",
-    "read-package-json": "^2.0.13",
-    "util.promisify": "^1.0.0"
+    "path-exists": "^3.0.0"
   },
   "devDependencies": {
     "@pnpm/logger": "^2.0.1",

shrinkwrap.yaml

@@ -1,10 +1,9 @@
 dependencies:
   '@pnpm/lifecycle': 'link:../__package_previews__/lifecycle/@pnpm/lifecycle'
+  '@pnpm/read-package-json': 1.0.0
   '@pnpm/types': 1.7.0
   npm-lifecycle: 2.0.3
   path-exists: 3.0.0
-  read-package-json: 2.0.13
-  util.promisify: 1.0.0
 devDependencies:
   '@pnpm/logger': 2.0.1
   '@types/load-json-file': 2.0.7
@@ -44,6 +43,16 @@ packages:
       node: '>=6'
     resolution:
       integrity: sha512-dST450D6Nj9iu0L16wqBv6dEXpbSQ6tyG1G9zSIzzjHqcDdKgdtpNR/0DvxpDEzBPfwGFQ868+o7AFaCuQsyig==
+  /@pnpm/read-package-json/1.0.0:
+    dependencies:
+      '@pnpm/types': 1.7.0
+      read-package-json: 2.0.13
+      util.promisify: 1.0.0
+    dev: false
+    engines:
+      node: '>=6'
+    resolution:
+      integrity: sha512-G2bs2KRL84eJggkUYxDpI8RA0xFKR4tNqvHy6bGF8fDIzNtkp17nOgEMIcA2ShSwUX80gQ8BpBh6ix5KKF46tw==
   /@pnpm/self-installer/2.0.5:
     dev: true
     engines:
@@ -3615,6 +3624,7 @@ shrinkwrapMinorVersion: 8
 shrinkwrapVersion: 3
 specifiers:
   '@pnpm/logger': ^2.0.1
+  '@pnpm/read-package-json': ^1.0.0
   '@pnpm/types': ^1.7.0
   '@types/load-json-file': ^2.0.7
   '@types/node': ^10.0.4
@@ -3627,10 +3637,8 @@ specifiers:
   npm-lifecycle: ^2.0.1
   package-preview: ^1.0.1
   path-exists: ^3.0.0
-  read-package-json: ^2.0.13
   rimraf: ^2.6.2
   tape: ^4.8.0
   ts-node: ^7.0.0
   tslint: ^5.8.0
   typescript: ^2.6.1
-  util.promisify: ^1.0.0

src/index.ts

@@ -1,13 +1,10 @@
+import {fromDir as readPackageJsonFromDir} from '@pnpm/read-package-json'
 import {PackageJson} from '@pnpm/types'
 import lifecycle = require('npm-lifecycle')
 import path = require('path')
 import exists = require('path-exists')
-import readPackageJsonCB = require('read-package-json')
-import promisify = require('util.promisify')
 import {LifecycleLog, lifecycleLogger} from './logger'
 
-const readPackageJson = promisify(readPackageJsonCB)
-
 function noop () {} // tslint:disable-line:no-empty
 
 export {LifecycleLog}
@@ -22,7 +19,7 @@ export async function runPostinstallHooks (
     unsafePerm: boolean,
   },
 ): Promise<boolean> {
-  const pkg = await readPackageJson(path.join(opts.pkgRoot, 'package.json'))
+  const pkg = await readPackageJsonFromDir(opts.pkgRoot)
   const scripts = pkg && pkg.scripts || {}
 
   if (!scripts.install) {