Gracefully handle missing pages

[vladimyr]

Description

This resolves #247 by listing alternative platforms if target one does not contain requested page ⚡️

Before

$ tldr trap --os=windows
✔ Page not found. Updating cache...
✔ Creating index...
Page not found.
If you want to contribute it, feel free to send a pull request to: https://github.com/tldr-pages/tldr

After

$ tldr trap --os=windows
✔ Page not found. Updating cache...
✔ Creating index...
Page `trap` not found on target platform (windows).

Available on: linux, osx
To view linux version run:
  $ tldr trap --os=linux
To view osx version run:
  $ tldr trap --os=osx

If you want to contribute it, feel free to send a pull request to: https://github.com/tldr-pages/tldr

Checklist

Please review this checklist before submitting a pull request.

• Code compiles correctly
• Created tests, if possible
• All tests passing (npm run test:all)
• Extended the README / documentation, if necessary

[agnivade]

Thanks ! Is it possible to have some tests too ? 😄

[agnivade]

@vladimyr - did you get a chance to look into this ? Should not take much time.

[vladimyr]

Thanks ! Is it possible to have some tests too ?

It certainly is

@vladimyr - did you get a chance to look into this ? Should not take much time.

True that but I'm being swamped lately so it will have to wait until I get some free time 😉

[agnivade]

Fantastic. Thanks for the update.

[agnivade]

ping @vladimyr. It would be good to get this in whenever you get some time.

[agnivade]

Actually, this will be taken care of in my PR for lang support. I will integrate this platform resolution logic in the index.findPlatform function as dictated by the client spec.

I will close this @vladimyr. Sorry about that, and thank you for the contribution !