ROOT: Add Python as a dependency to assure PyROOT bindings are correctly linked.

ROOT currently does not have a :python dependency, which causes ROOT to
link against system python instead of homebrew python.  This commit adds
a :python dependency, which does not affect users who use system python
(since homebrew will still link them to system python), but which does
fix linking for users who use a brewed python.  The logic behind making
this dependency non-optional is:

1) Speaking from first-hand experience, most LHC analyses use PyROOT
more than ROOT's built-in CINT interpreter, so it makes sense to have
this always-on, as users will expect it.
2) For users who don't have a brewed python, this doesn't add any extra
build dependencies.
3) The existing formula is compiled with the --all flag, and has no
option to disable python bindings, so this really doesn't change the
interface to the formula.

Closes #20704.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/Library/Formula/root.rb b/Library/Formula/root.rb
index 7a18c0698..e505c89e5 100644
--- a/Library/Formula/root.rb
+++ b/Library/Formula/root.rb
@@ -8,6 +8,7 @@ class Root < Formula
 
   depends_on 'fftw' => :optional
   depends_on :x11
+  depends_on :python
 
   def install
     #Determine architecture