git-gui: Display message box when we cannot find git in $PATH

If we cannot find the git executable in the user's $PATH then
we cannot function correctly.  Because we need that to get the
version so we can load our library correctly we cannot rely on
the library function "error_popup" here, as this is all running
before the library path has been configured, so error_popup is
not available to us.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
1 file changed
tree: ed79c704093f65532e8126ad65ad23540026de03
  1. lib/
  2. .gitignore
  3. git-gui.sh
  4. GIT-VERSION-GEN
  5. Makefile