[PATCH wayland-build-tools] Add helper script to setup and use an uninstalled environment

[Bryce Harrington]

On Wed, Aug 31, 2016 at 11:17:09PM +0100, Emil Velikov wrote:
> On 31 August 2016 at 19:10, Derek Foreman <derekf at osg.samsung.com> wrote:
> >>> +* Edit a local copy of the script to make $WLD point to the base directory
> >> How about one honours the WLD that's already set since ...
> >
> > It's not already set - the script exports it.  Oh, this seems to be the
> > same variable name used in some of the build instructions at:
> > https://wayland.freedesktop.org/building.html
> >
> > and in weston's releasing.txt.
> >
> > Is that the problem?
> >
> Definitely not a problem, esp. since I've completely misread the help
> text. Hope I'm the only one...
> In general I'm biased towards "the script should just work and if you
> modify it that means there's something wrong" behaviour.

The other wl_* scripts in wayland-build-tools load from a config file.
I'd recommend wl_uninstall follow suit to remain consistent with the
other scripts in the toolset.  I.e.:

  #!/bin/bash

  . $HOME/.config/wayland-build-tools/wl_defines.sh

  if [ ! -e $WLROOT ]; then
      exit 1
  fi

  #...

An example wl_defines.sh is included in the git tree for the user to
(manually) copy to .config/wayland-build-tools.  (As described in step
#2 in the README).  It should work fine unmodified, but the user can
customize their $WLD in that file without needing to edit any of the
actual scripts or set up their environment.

Bryce