Check for existing README prior to creation

When adding an existing local project, choosing to create a new repository, the UI displays an option to Initialise this repository with a README.

This option was selected by default and in a tired state I selected ‘create’. This completely wiped the README.MD file I had spent an hour writing and there doesn’t seem to be a way of recovering this.

Potential solution

Check for existing README.MD file and prompt user if one exists.

[Daniel-McCarthy]

@msftrncs This is a great point.

I have the a branch ready with the previously suggested changes ready for a pull request. I think the warning should be added at a bare minimum since currently the user is not notified whatsoever.

However, if we want to rethink the solution for this I would love to hear what the team thinks on this. If we wanted a confirm/decline dialog we could also have a setting to disable to the dialog (with the default being the dialog enabled, ideally).

Otherwise, if a ReadMe.md file already exists, does the user really have any benefit to initializing the repository with a new ReadMe? It would be fresh and blank, but it does not seem like a substantial convenience. We could disable the check box if a ReadMe is detected and have a message explaining why so as to avoid confusion.

[Daniel-McCarthy]

@outofambit Great! In regards to checking for multiple possible names, regular expressions would be a great way to check for a match regardless of the capitalization combinations, as well as with/without the inclusion of the .md extension

Otherwise, if we didn’t want to use regular expressions for this, setting the string we are checking .toLowerCase() could limit the need to check for lots of variations and leave it to only readme.md and readme.