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package worker
import (
"github.com/containerd/containerd/filters"
"github.com/hashicorp/go-multierror"
"github.com/moby/buildkit/cache"
"github.com/moby/buildkit/client"
"github.com/pkg/errors"
)
// Controller holds worker instances.
// Currently, only local workers are supported.
type Controller struct {
// TODO: define worker interface and support remote ones
workers []Worker
}
func (c *Controller) Close() error {
var rerr error
for _, w := range c.workers {
if err := w.Close(); err != nil {
rerr = multierror.Append(rerr, err)
}
}
return rerr
}
// Add adds a local worker.
// The first worker becomes the default.
//
// Add is not thread-safe.
func (c *Controller) Add(w Worker) error {
c.workers = append(c.workers, w)
return nil
}
// List lists workers
func (c *Controller) List(filterStrings ...string) ([]Worker, error) {
filter, err := filters.ParseAll(filterStrings...)
if err != nil {
return nil, err
}
var workers []Worker
for _, w := range c.workers {
if filter.Match(adaptWorker(w)) {
workers = append(workers, w)
}
}
return workers, nil
}
// GetDefault returns the default local worker
func (c *Controller) GetDefault() (Worker, error) {
if len(c.workers) == 0 {
return nil, errors.Errorf("no default worker")
}
return c.workers[0], nil
}
func (c *Controller) Get(id string) (Worker, error) {
for _, w := range c.workers {
if w.ID() == id {
return w, nil
}
}
return nil, errors.Errorf("worker %s not found", id)
}
// TODO: add Get(Constraint) (*Worker, error)
// WorkerInfos returns slice of WorkerInfo.
// The first item is the default worker.
func (c *Controller) WorkerInfos() []client.WorkerInfo {
out := make([]client.WorkerInfo, 0, len(c.workers))
for _, w := range c.workers {
out = append(out, client.WorkerInfo{
ID: w.ID(),
Labels: w.Labels(),
Platforms: w.Platforms(false),
BuildkitVersion: w.BuildkitVersion(),
})
}
return out
}
func (c *Controller) Infos() Infos {
return &infosController{c: c}
}
type infosController struct {
c *Controller
}
var _ Infos = &infosController{}
func (c *infosController) DefaultCacheManager() (cache.Manager, error) {
w, err := c.c.GetDefault()
if err != nil {
return nil, err
}
return w.CacheManager(), nil
}
func (c *infosController) WorkerInfos() []client.WorkerInfo {
return c.c.WorkerInfos()
}
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