The list of steps to be executed within a macro is split into setup
commands, main commands and cleanup commands to ensure that new steps
are added to the appropriate place in the execution order by plugins.
By default, the setup and cleanup commands are set to the default list
of steps which the build and shell plugins have in common. It's expected
that most future plugins will also share these common setup and cleanup
steps but we do provide arguments to the Macro initialiser to skip these
if customisation is needed.
Signed-off-by: Paul Barker <pbarker@konsulko.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
The docstrings for the build and shell plugins are extended so that they
clearly describe each plugin and give brief examples of their use.
Also fix a typo in the build command help message.
Signed-off-by: Paul Barker <pbarker@konsulko.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
This change moves all plugin handling code into the kas.plugins module.
New accessor functions `plugins.get(name)` and `plugins.all()` are
provided to wrap the plugins dictionary so that the kas main function
doesn't need to worry about how this is accessed. Plugins are loaded at
runtime rather than at parse time by calling `plugins.load()` which
gives us an improved ability to handle errors.
The `@kasplugin` decorator is removed as it modified and attribute on
the kasplugin function itself when a plugin module was loaded. Importing
a module should not result in changes to a variable in a different
module as it leads to an initialization code flow which is difficult to
reason about. Instead, plugin modules should now list the plugins which
they introduce in a `__KAS_PLUGINS__` list which will be walked at
runtime by `plugins.load()`.
Signed-off-by: Paul Barker <pbarker@konsulko.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
This change groups the plugin modules together under kas.plugins and
moves the @kasplugin decorator to this submodule. This will ensure the
codebase stays organised as more plugins are added.
Signed-off-by: Paul Barker <pbarker@konsulko.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
