No overwrite option

[manticorp]

Please make an option to not overwrite a file if it exists!

For example:

copy-file --overwrite false src.txt dest.txt

and if dest.txt exists, it will not overwrite it.

Use case is for a post-install script that populates some default files for an application, but don't want to overwrite those files once the end user has already written data to those files.

[dpilafian]

When the --no-overwrite flag is used and the target file already exists, a "skip" message similar to the following will be displayed:

[10:52:42] copy-file build/app.js → dist/app.js (1ms, skip -- target exists)