commands: add implementations for create, use, rm, stop

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

build/build.go

@@ -40,7 +40,27 @@ type Inputs struct {
 	InStream       io.Reader
 }
 
-func Build(ctx context.Context, drivers []driver.Driver, opt map[string]Options, pw progress.Writer) (map[string]*client.SolveResponse, error) {
+type DriverInfo struct {
+	Driver   driver.Driver
+	Name     string
+	Platform []string // TODO: specs.Platform
+	Err      error
+}
+
+func getFirstDriver(drivers []DriverInfo) (driver.Driver, error) {
+	err := errors.Errorf("no drivers found")
+	for _, di := range drivers {
+		if di.Driver != nil {
+			return di.Driver, nil
+		}
+		if di.Err != nil {
+			err = di.Err
+		}
+	}
+	return nil, err
+}
+
+func Build(ctx context.Context, drivers []DriverInfo, opt map[string]Options, pw progress.Writer) (map[string]*client.SolveResponse, error) {
 	if len(drivers) == 0 {
 		return nil, errors.Errorf("driver required for build")
 	}
@@ -50,7 +70,10 @@ func Build(ctx context.Context, drivers []driver.Driver, opt map[string]Options,
 	}
 
 	pwOld := pw
-	d := drivers[0]
+	d, err := getFirstDriver(drivers)
+	if err != nil {
+		return nil, err
+	}
 	_, isDefaultMobyDriver := d.(interface {
 		IsDefaultMobyDriver()
 	})