Mac下安裝cordova-hot-code-push-cli失敗，執行命令為：sudo npm i -g cordova-hot-code-push-cli

具體錯誤日誌如下：

npm WARN deprecated [email protected]: This package is no longer supported. It's now a built-in Node module. If you've depended on crypto, you should switch to the one that's built-in.
npm WARN deprecated 
 
[email protected]: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated [email protected]: renamed to d3-queue
/Users/xxx/.npm-global/bin/cordova-hcp -> /Users/shanon/.npm-global/lib/node_modules/cordova-hot-code-push-cli/bin/cordova-hcp

> [email protected]
 
 postinstall /Users/xxx/.npm-global/lib/node_modules/cordova-hot-code-push-cli/node_modules/ngrok
> node ./postinstall.js

ngrok - unpacking binary
ngrok - error unpacking binary { Error: EACCES: permission denied, open '/Users/xxx/.npm-global/lib/node_modules/cordova-hot-code-push-cli/node_modules/ngrok/bin/ngrok'
  errno: -13,
  code: 'EACCES',
  syscall: 'open',
  path: '/Users/shanon/.npm-global/lib/node_modules/cordova-hot-code-push-cli/node_modules/ngrok/bin/ngrok' }
ngrok - install failed, retrying
ngrok - downloading binary https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-darwin-amd64.zip
ngrok - error storing binary to local file { Error: EACCES: permission denied, open '/Users/xxx/.ngrok/aHR0cHM6Ly9iaW4uZXF1aW5veC5pby9jLzRWbUR6QTdpYUhiL25ncm9rLXN0YWJsZS1kYXJ3aW4tYW1kNjQuemlw.zip'
  errno: -13,
  code: 'EACCES',
  syscall: 'open',
  path: '/Users/xxx/.ngrok/aHR0cHM6Ly9iaW4uZXF1aW5veC5pby9jLzRWbUR6QTdpYUhiL25ncm9rLXN0YWJsZS1kYXJ3aW4tYW1kNjQuemlw.zip' }
ngrok - install failed, retrying
ngrok - downloading binary https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-darwin-amd64.zip
ngrok - error storing binary to local file { Error: EACCES: permission denied, open '/Users/xxx/.ngrok/aHR0cHM6Ly9iaW4uZXF1aW5veC5pby9jLzRWbUR6QTdpYUhiL25ncm9rLXN0YWJsZS1kYXJ3aW4tYW1kNjQuemlw.zip'
  errno: -13,
  code: 'EACCES',
  syscall: 'open',
  path: '/Users/shanon/.ngrok/aHR0cHM6Ly9iaW4uZXF1aW5veC5pby9jLzRWbUR6QTdpYUhiL25ncm9rLXN0YWJsZS1kYXJ3aW4tYW1kNjQuemlw.zip' }
ngrok - install failed { Error: EACCES: permission denied, open '/Users/xxx/.ngrok/aHR0cHM6Ly9iaW4uZXF1aW5veC5pby9jLzRWbUR6QTdpYUhiL25ncm9rLXN0YWJsZS1kYXJ3aW4tYW1kNjQuemlw.zip'
  errno: -13,
  code: 'EACCES',
  syscall: 'open',
  path: '/Users/xxx/.ngrok/aHR0cHM6Ly9iaW4uZXF1aW5veC5pby9jLzRWbUR6QTdpYUhiL25ncm9rLXN0YWJsZS1kYXJ3aW4tYW1kNjQuemlw.zip' }
npm WARN 
 
[email protected] requires a peer of [email protected]~1.4.0 but none is installed. You must install peer dependencies yourself.

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] postinstall: `node ./postinstall.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the [email protected] postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/shanon/.npm/_logs/2019-01-08T04_03_05_057Z-debug.log

錯誤提示顯示permission問題，然後安裝ngrok失敗，嘗試各種方式，其實還是許可權不夠的問題，顯示簡介給了許可權也沒用。

最後翻閱各種帖子，我的解決方式如下：

npm config set unsafe-perm=true

執行該語句後，再執行上面的安裝命令，居然成功了。

另外有些情況用如下方式也能解決，此處記錄一下；

sudo npm i -g ngrok --unsafe-perm=true --allow-root