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moby--moby/api/server/router/build/build.go
Sebastiaan van Stijn 2c17e9a333 api: set default "Builder-Version" to "2" (BuildKit) on Linux
Starting with the 22.06 release, buildx is the default client for
docker build, which uses BuildKit as builder.

This patch changes the default builder version as advertised by
the daemon to "2" (BuildKit), so that pre-22.06 CLIs with BuildKit
support (but no buildx installed) also default to using BuildKit
when interacting with a 22.06 (or up) daemon.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2022-08-18 12:18:32 -06:00

62 lines
1.7 KiB
Go

package build // import "github.com/docker/docker/api/server/router/build"
import (
"runtime"
"github.com/docker/docker/api/server/router"
"github.com/docker/docker/api/types"
)
// buildRouter is a router to talk with the build controller
type buildRouter struct {
backend Backend
daemon experimentalProvider
routes []router.Route
features *map[string]bool
}
// NewRouter initializes a new build router
func NewRouter(b Backend, d experimentalProvider, features *map[string]bool) router.Router {
r := &buildRouter{
backend: b,
daemon: d,
features: features,
}
r.initRoutes()
return r
}
// Routes returns the available routers to the build controller
func (r *buildRouter) Routes() []router.Route {
return r.routes
}
func (r *buildRouter) initRoutes() {
r.routes = []router.Route{
router.NewPostRoute("/build", r.postBuild),
router.NewPostRoute("/build/prune", r.postPrune),
router.NewPostRoute("/build/cancel", r.postCancel),
}
}
// BuilderVersion derives the default docker builder version from the config.
//
// The default on Linux is version "2" (BuildKit), but the daemon can be
// configured to recommend version "1" (classic Builder). Windows does not
// yet support BuildKit for native Windows images, and uses "1" (classic builder)
// as a default.
//
// This value is only a recommendation as advertised by the daemon, and it is
// up to the client to choose which builder to use.
func BuilderVersion(features map[string]bool) types.BuilderVersion {
// TODO(thaJeztah) move the default to daemon/config
if runtime.GOOS == "windows" {
return types.BuilderV1
}
bv := types.BuilderBuildKit
if v, ok := features["buildkit"]; ok && !v {
bv = types.BuilderV1
}
return bv
}