This pathToClip addin allows you to store the active document's path to the clipboard.
While many editors have this feature built-in, RStudio doesn't (at least not yet).
On OS X and Linux, it uses the clipr package, which in turn relies on either "xclip" or "xsel", small utilities that can be installed in just a few seconds. See here, for Linux distro-specific instructions.
On Windows, no additional software is required.
It can be installed via 'addinslist', or using 'devtools' or 'remotes':
remotes::install_github("dcomtois/pathToClip")As with any other addin, you can assign a keyboard shortcut to it.
I like to use < Ctrl + Alt + C >, since it's easy to remember and it's not pre-assigned (see animated demo if needed).
If you don't like having 3 entries in your Addins menu and need only the platform-specific path separator, install version 0.1.0:
remotes::install_github("dcomtois/pathToClip", ref="0-1-0")