/
observer.go
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/
observer.go
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// Copyright (c) 2020-2021 C4 Project
//
// This file is part of c4t.
// Licenced under the MIT licence; see `LICENSE`.
package builder
import (
"github.com/c4-project/c4t/internal/observing"
)
// Observer is the interface for things that observe a builder.
type Observer interface {
// OnBuild sends a builder observation message.
OnBuild(Message)
}
//go:generate mockery --name=Observer
// Message is the type of builder observation messages.
type Message struct {
observing.Batch
// Manifest carries the name of the subject being (re-)built, if we're on a build-start.
Name string `json:"name,omitempty"`
// Request carries a builder request, if we're on a build-step.
Request *Request `json:"request,omitempty"`
}
// OnBuild sends an OnBuild message to each observer in obs.
func OnBuild(m Message, obs ...Observer) {
for _, o := range obs {
o.OnBuild(m)
}
}
// StartMessage creates an build-start message using manifest m.
func StartMessage(m Manifest) Message {
return Message{Batch: observing.NewBatchStart(m.NReqs), Name: m.Name}
}
// StepMessage creates a build-step message for step i and request r.
func StepMessage(i int, r Request) Message {
return Message{Batch: observing.NewBatchStep(i), Request: &r}
}
// EndMessage creates a build-end message.
func EndMessage() Message {
return Message{Batch: observing.NewBatchEnd()}
}