Customize the command used to install CocoaPods

From @NathanWalker on March 19, 2016 23:55

Because some CocoaPods can be finicky at best to get working with {N} plugins, it would probably help to be able to customize or specify a command to run a pod install.
For example, please see this issue:
https://github.com/segment-integrations/analytics-ios-integration-google-analytics/issues/3#issuecomment-164874798

The issue arises from the Segment-GoogleAnalytics pod and the solution posted above involves a custom install of CocoaPods and the usage of bundle exec pod install along with a Gemfile to circumvent the issues.

It would be nice that when running tns emulate ios with CocoaPods involved, a command line argument could be passed to provide a custom pod install command to be able to use this solution.

Working on this {N} plugin for Segment:
https://github.com/NathanWalker/nativescript-segment
Blocked by this at moment.

Copied from original issue: NativeScript/ios-runtime#535

Bắt đầu từ luồng tns emulate ios và lần theo nơi CocoaPods chạy pod install. Xem xét workaround được yêu cầu với bundle exec pod install và Gemfile, sau đó xác định cách cung cấp một lệnh tùy chỉnh. Hoàn tất khi luồng mô phỏng iOS có thể sử dụng lệnh đó cho các dự án cần cài đặt CocoaPods tùy chỉnh.