bootstrap.py *still* blows away changes to editable git checkouts

[qris]

bootstrap.py *still* blows away changes to editable git checkouts

[foobacca]

I guess this must be due to pip. I agree it's not cool and ideally it would be fixed in pip, but as that's not currently the case we could add some code so that bootstrap could check each checkout in .ve/src/ and if git status --porcelain showed any changes we could check if the user wanted to continue.

Also you title this bug report "still blows away" - was there a previous bug report I missed where we thought it was fixed? Or are you referring to the change where we stopped blowing away the entire virtualenv?

[qris]

When we had the big debate about using git submodule or pip -e, I expressed a preference for using submodules because they wouldn't be blown away automatically.

I think someone said that was impossible at the time, and I should just use pip -e. It's clearly not impossible.