Table of Contents

Class Update

Namespace
ZeroInstall.Commands.Basic
Assembly
0install.dll

Check for updates to the program and download them if found.

public class Update : Download
Inheritance
Update
Inherited Members

Constructors

Update(ICommandHandler)

Creates a new update command.

public Update(ICommandHandler handler)

Parameters

handler ICommandHandler

A callback object used when the user needs to be asked questions or informed about download and IO tasks.

Fields

Name

public const string Name = "update"

Field Value

string

Properties

Description

A short description of what this command does.

public override string Description { get; }

Property Value

string

Methods

Execute()

Executes the commands specified by the command-line arguments. Must call Parse(IReadOnlyList<string>) first!

public override ExitCode Execute()

Returns

ExitCode

The exit status code to end the process with.

Remarks

When inheriting this method is usually replaced.

Exceptions

OperationCanceledException

The user canceled the task.

OptionException

The number of arguments passed in on the command-line is incorrect.

WebException

A file could not be downloaded from the internet.

NotSupportedException

A file format, protocol, etc. is unknown or not supported.

IOException

A downloaded file could not be written to the disk or extracted or an external application or file required by the solver could not be accessed.

UnauthorizedAccessException

An operation failed due to insufficient rights.

InvalidDataException

A problem occurred while deserializing an XML file.

SignatureException

The signature data could not be handled for some reason.

FormatException

An URI, local path, version number, etc. is invalid.

DigestMismatchException

An Implementation's Archives don't match the associated ManifestDigest.

SolverException

The ISolver was unable to provide Selections that fulfill the Requirements.

ImplementationNotFoundException

One of the ImplementationBases is not cached yet.

ExecutorException

The IExecutor was unable to process the Selections.

ShowOutput()

Shows a list of changes found by the update process.

protected override ExitCode ShowOutput()

Returns

ExitCode