[cmake-developers] [patch] One more pattern for extracting file name from URL

[Ben Boeckel]

On Tue, Jul 05, 2016 at 21:01:36 +0300, Ruslan Baratov wrote:
> Well it's never too late to learn something new. Also `tar` is not 
> widely used on Windows so to write nice code you should convert it to 
> `cmake -E tar`. That the whole point of `cmake -E` feature.
> I don't see the problem here, it was used internally, unpack archive for 
> you and you can do what you want with **unpacked** sources. Anyway you 
> can always force the name with |DOWNLOAD_NAME.|

I'm more considering the case of using the files as they exist on the
disk for other purposes, not necessarily through code (which probably
should be using `cmake -E tar`). For example, I will do:

  - tar xf $tarball.tar.gz
  - cp -a $tarball $tarball.to-patch
  - $edit .to-patch
  - diff -U5 -r $tarball $tarball.to-patch

to create patches for ExternalProject tarballs we use.

--Ben