Command: Event Handlers

Event Handlers Associated With Command (*CmdS)

The standard event handlers are:

• .PreAction(...OnPreInvokeHandler)
• .PostAction(...OnPostInvokeHandler)
• .OnAction(...OnInvokeHandler)
• .OnMatch(...OnCommandMatchedHandler)

They all fits for the lifecycle of a subcmd will be Invoking (OnAction), Before Invoking (PreAction) and After Invoking (PostAction).

In addition, there are more event handlers for loading subcmds or flags at runtime:

• .OnEvalSubcommands(...)
• .OnEvalSubcommandsOnce(...)
• .OnEvalFlags(...)
• .OnEvalFlagsOnce(...)

Besides that, a similar feature is loading alias subcmds from alias section in a config file:

• .OnEvaluateSubCommandsFromConfig("alias")

About these handlers and howto write with its, refer to the source code of jump/to subcommand, and godoc of cmdr.v2.

额外的话题