feat: add y/n dialog before modifying rcfile

[tusharsadhwani]

Resolves #34

[tusharsadhwani]

@pawamoy can you run install.sh manually (download file from github / git clone whatever works) and confirm that it asks for confirmation before modification?

Ensure that .yen/bin isn't already in your rcfile. It should ask for confirmation before adding it in.

[pawamoy]

% sh install.sh 
This script will automatically download and install yen for you.
Getting it from this url: https://github.com/tusharsadhwani/yen/releases/latest/download/yen-rs-x86_64-unknown-linux-musl
The binary will be installed into '/home/pawamoy/.yen/bin'
############################################################################################################################################################################## 100.0%
############################################################################################################################################################################## 100.0%
############################################################################################################################################################################## 100.0%
Install 'yen' in '/home/pawamoy/.zshrc'? [y/n] 
Please restart or source your shell.

🎉

[tusharsadhwani]

Awesome. Simply merging this PR will change the behaviour of the curl command to the new behaviour. So, consider it fixed!

[pawamoy]

Ah you're too fast! I was going to suggest printing a message showing how to "source" yen when the user chooses not to modify the rc file 🙂

Something like:

To enable yen in you shell environment, add this command to the startup script of your choice:

export PATH="${PATH}:/home/pawamoy/.yen/bin"

[tusharsadhwani]

whoops

[tusharsadhwani]

I think it's fine for now as the script does mention where the binary will be put. If you think it needs improvement do send a PR.

[pawamoy]

Yes, I agree, I think it's fine too 🙂