Onpackage

Onpackage is a term used in software tooling to denote a hook or event that fires when a software package is processed by a package manager or related tooling. In plugin architectures and packaging systems that support event hooks, onpackage allows custom code to run in response to packaging activities such as installation, upgrade, removal, or packaging of artifacts.

Mechanism: The hook is implemented as a registered listener that receives a context object with fields such as packageName, version, action (install, upgrade, remove), source, timestamp, and environment. Implementations vary, but the common pattern is that the listener is invoked as part of the packaging workflow, either synchronously or asynchronously, to perform automated tasks.

Contexts and usage: Onpackage is used by build tools, deployment pipelines, and plugin ecosystems to automate tasks, enforce policies, gather analytics, validate package content, or integrate with external systems such as continuous integration servers, ticketing systems, or artifact repositories.

Example: In a hypothetical plugin API, a listener might be registered as:

plugin.register('onpackage', (ctx) => {

if (ctx.action === 'install') {

log.info(`Installed ${ctx.packageName}@${ctx.version}`);

}

});

This illustrates how the event can be leveraged to respond to specific packaging actions with custom logic.

Variants and naming: Some systems differentiate by prefixing or capitalizing, using onPackage, onpackageStart, onpackageEnd, or onPackageEvent to denote different stages or granularities of the packaging process. See also package manager, hook, and lifecycle script for related concepts.

Notes: The exact semantics of onpackage are not standardized and depend on the specific tool or framework. It represents a general pattern in event-driven plugin architectures related to packaging workflows.