Rework the devshell

From: Chris Larson <[email protected]>

- Adds a utility metaclass for maintaining class registries
- Shifts the handling of spawning a terminal into a new 'terminal' python module
- Automatically selects an appropriate terminal based on what you have available on your machine
- Still allows manual selection, but in a more convenient way, and falls back to auto if you select an invalid or unavailable (not installed) terminal
- Improves how we spawn screen:

- Shows a warning when spawning it, so do_devshell doesn't appear to hang
- Spawns a named screen session 'devshell', to avoid confusion when the user already has other screen sessions running

Example usage of the new API for others (e.g. patch resolver) to use:

import oe.terminal
oe.terminal.run(command, terminal_title, d)

Pull URL: git://git.openembedded.org/openembedded-core-contrib
Branch: kergoth/devshell
Browse: http://git.openembedded.org/cgit.cgi/openembedded-core-contrib/log/?h=kergoth/devshell

Thanks,
Chris Larson <[email protected]>
---

Chris Larson (3):
oe.classutils: add module
Rework how the devshell functions
oe.terminal: improve how we spawn screen

 meta/classes/devshell.bbclass |   25 ++------
 meta/conf/bitbake.conf        |    9 +++
 meta/lib/oe/classutils.py     |   45 ++++++++++++++
 meta/lib/oe/terminal.py       |  131 +++++++++++++++++++++++++++++++++++++++++
 4 files changed, 191 insertions(+), 19 deletions(-)
 create mode 100644 meta/lib/oe/classutils.py
 create mode 100644 meta/lib/oe/terminal.py