Package zeroinstall :: Package injector :: Module driver :: Class Driver

Class Driver

object --+
         |
        Driver

Chooses a set of implementations based on a policy. Typical use:

Create a Driver object, giving it the requirements about the program to be run.
Call solve_with_downloads. If more information is needed, a fetch.Fetcher will be used to download it.
When all downloads are complete, the solver contains the chosen versions.
Use get_uncached_implementations to find where to get these versions and download them using download_uncached_implementations.

Instance Methods

__init__(self, config, requirements)
x.__init__(...) initializes x; see help(type(x)) for signature

source code

[(model.Interface, model.Implementation)]

get_uncached_implementations(self)
List all chosen implementations which aren't yet available locally.

source code

solve_with_downloads(self, force=False, update_local=False)
Run the solver, then download any feeds that are missing or that need to be updated.

source code

solve_and_download_impls(self, refresh=False, select_only=False)
Run solve_with_downloads and then get the selected implementations too.

source code

bool

need_download(self)
Decide whether we need to download anything (but don't do it!)

source code

zeroinstall.support.tasks.Blocker

download_uncached_implementations(self)
Download all implementations chosen by the solver that are missing from the cache.

source code

Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __sizeof__, __str__, __subclasshook__

Instance Variables
solve.Solver	solver solver used to choose a set of implementations
arch.Architecture	target_arch target architecture for binaries (deprecated)
	watchers callbacks to invoke after solving

Properties
Inherited from `object`: `__class__`

Method Details

init(self, config, requirements)
(Constructor)

source code

x.__init__(...) initializes x; see help(type(x)) for signature

Parameters:

config (config.Config) - The configuration settings to use
requirements (requirements.Requirements) - Details about the program we want to run

Overrides: object.__init__

Since: 0.53

solve_with_downloads(self, force=False, update_local=False)

source code

Run the solver, then download any feeds that are missing or that need to be updated. Each time a new feed is imported into the cache, the solver is run again, possibly adding new downloads.

Parameters:

force (bool) - whether to download even if we're already ready to run.
update_local (bool) - fetch PackageKit feeds even if we're ready to run.

Decorators:

@tasks.async

solve_and_download_impls(self, refresh=False, select_only=False)

source code

Run solve_with_downloads and then get the selected implementations too.

Parameters:

select_only (bool)
refresh (bool)

Decorators:

@tasks.async

Raises:

SafeException - if we couldn't select a set of implementations

Since: 0.40

need_download(self)

source code

Decide whether we need to download anything (but don't do it!)

Returns: bool: true if we MUST download something (feeds or implementations)

Class Driver

__init__(self, config, requirements) (Constructor)

solve_with_downloads(self, force=False, update_local=False)

solve_and_download_impls(self, refresh=False, select_only=False)

need_download(self)

init(self, config, requirements)
(Constructor)