update error message

README.md

@@ -8,7 +8,7 @@ Husky can prevent bad `git commit`, `git push` and more 🐶 _woof!_
 
 **Announcement: Husky v5 has been published, to view v5 docs click [here](https://typicode.github.io/husky).**
 
-**Note for npm 7 users** Currently `INIT_CWD` environment variable is missing in npm v7 and is required for Husky v4 to auto-install (https://github.com/npm/cli/issues/2033). To manually install husky v4, run `npx --no-install husky install .` or upgrade to husky v5.
+**Note for npm v7 users** Currently `INIT_CWD` environment variable is missing in npm v7 and is required for Husky v4 to auto-install (https://github.com/npm/cli/issues/2033). To manually install husky v4, run `INIT_CWD="$(pwd)" npm install husky --save-dev` or upgrade to [husky v5](https://typicode.github.io/husky/#/).
 
 ## Install
 

package.json

@@ -3,7 +3,6 @@
   "version": "4.3.3",
   "description": "Prevents bad commit or push (git hooks, pre-commit/precommit, pre-push/prepush, post-merge/postmerge and all that stuff...)",
   "bin": {
-    "husky": "./husky.js",
     "husky-run": "./bin/run.js",
     "husky-upgrade": "./lib/upgrader/bin.js"
   },
@@ -93,16 +92,8 @@
       "^.+\\.tsx?$": "ts-jest"
     },
     "testRegex": "(/__tests__/.*|(\\.|/)(test|spec))\\.(jsx?|tsx?)$",
-    "testPathIgnorePatterns": [
-      "node_modules",
-      "__env__.ts"
-    ],
-    "moduleFileExtensions": [
-      "ts",
-      "js",
-      "json",
-      "node"
-    ]
+    "testPathIgnorePatterns": ["node_modules", "__env__.ts"],
+    "moduleFileExtensions": ["ts", "js", "json", "node"]
   },
   "collective": {
     "type": "opencollective",

src/installer/bin.ts

@@ -43,7 +43,12 @@ function getInitCwdEnv(): string {
   if (INIT_CWD === undefined) {
     const { name, version } = whichPMRuns()
     throw new Error(
-      `INIT_CWD is not set, please check that your package manager supports it (${name} ${version})`
+      `INIT_CWD is not set, please check that your package manager supports it (${name} ${version})
+
+Alternatively, you could set it manually:
+INIT_CWD="$(pwd)" npm install husky --save-dev
+
+Or upgrade to husky v5`
     )
   }
 
@@ -84,12 +89,8 @@ function run(): void {
       checkGitVersion()
     }
 
-    let cwd = process.argv[3]
-    if (cwd === undefined) {
-      cwd = getInitCwdEnv()
-    }
-
-    const userPkgDir = getUserPkgDir(cwd)
+    const INIT_CWD = getInitCwdEnv()
+    const userPkgDir = getUserPkgDir(INIT_CWD)
     checkGitDirEnv()
     const { absoluteGitCommonDir, relativeUserPkgDir } = getDirs(userPkgDir)