tree e6c0d0494fe973276f0a22deb6160afa60083376
parent f43a7d76c737c5bb9b903a2b1be5186c081ec21e
author Brad King <brad.king@kitware.com> 1564500362 -0400
committer Brad King <brad.king@kitware.com> 1564500598 -0400

source_group: Fix regression in relative FILES

Fix the check added in commit 8d93815d20 (source_group command ensures
that FILES arguments are actually files, 2019-04-25, v3.15.0-rc1~195^2)
to convert to an absolute path before checking for existence.

Also simplify the conversion to an absolute path.

Fixes: #19454