bitbake: bitbake-setup: rework the settings handling

This is the outcome of various discussions, suggestions and pull
requests on github.

What has specifically changed?

1. The sources for the settings are no longer separated, but are stacked and given priorities,
from highest to lowest:

    a. '--setting section key value' on the command line

    b. a settings file in the top directory

    c. a global settings file in ~/.config/bitbake-setup/ (or in a file pointed to by --global-settings)

Any setting can be in any of these three locations (other than top dir name and prefix which do not
make sense in the settings file in the top directory).

2. A global settings file must contain all of the needed settings, while a settings file
in the top directory can be empty (and this is how they are written out if they do not exist).

Specifically, both dl-dir and registry settings have been relocated to the global file,
and dl-dir defaults to ~/.cache/bitbake-setup/downloads, rather than somewhere in top dir.

3. The file name for both global and top dir settings is now 'settings.conf'.

4. --top-dir-prefix and --top-dir-name options have been removed and superseded by
a generic, universal --setting option.

5. 'install-settings' command has been removed, as it is no longer does anything useful,
and is superseded by the 'setting' command (see below).

'install-global-settings' has been retained, to be able to have a set of global defaults
that can be changed without initializing a build.

6. 'change-setting', 'change-global-setting' and 'install-settings' have all been replaced
by a single 'setting' command that mimics 'git config' in its parameters:

    a. Changing a setting: bitbake-setup setting [--global] default dl-dir /path/to/downloads

    b. Removing a setting: bitbake-setup setting [--global] --unset default dl-dir

(Bitbake rev: dbf593e4f7441e423ce4f2a8c7b0365a1c93bd23)

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions