bake: allow overriding no-cache and pull per target via --set

Signed-off-by: Tibor Vass <tibor@docker.com>

bake/bake.go

@@ -5,6 +5,7 @@ import (
 	"io/ioutil"
 	"os"
 	"path"
+	"strconv"
 	"strings"
 
 	"github.com/docker/buildx/build"
@@ -185,6 +186,18 @@ func (c Config) setOverrides(overrides []string) error {
 				t.Platforms = append(t.Platforms, parts[1])
 			case "output":
 				t.Outputs = append(t.Outputs, parts[1])
+			case "no-cache":
+				noCache, err := strconv.ParseBool(parts[1])
+				if err != nil {
+					return errors.Errorf("invalid value %s for boolean key no-cache", parts[1])
+				}
+				t.NoCache = noCache
+			case "pull":
+				pull, err := strconv.ParseBool(parts[1])
+				if err != nil {
+					return errors.Errorf("invalid value %s for boolean key pull", parts[1])
+				}
+				t.Pull = pull
 			default:
 				return errors.Errorf("unknown key: %s", keys[1])
 			}
@@ -274,6 +287,8 @@ type Target struct {
 	SSH        []string          `json:"ssh,omitempty" hcl:"ssh,omitempty"`
 	Platforms  []string          `json:"platforms,omitempty" hcl:"platforms,omitempty"`
 	Outputs    []string          `json:"output,omitempty" hcl:"output,omitempty"`
+	Pull       bool              `json:"pull,omitempty": hcl:"pull,omitempty"`
+	NoCache    bool              `json:"no-cache,omitempty": hcl:"no-cache,omitempty"`
 }
 
 func (t *Target) normalize() {