bake: add attests field

Signed-off-by: Justin Chadwell <me@jedevc.com>

bake/bake.go

@@ -417,7 +417,7 @@ func (c Config) newOverrides(v []string) (map[string]map[string]Override, error)
 			o := t[kk[1]]
 
 			switch keys[1] {
-			case "output", "cache-to", "cache-from", "tags", "platform", "secrets", "ssh":
+			case "output", "cache-to", "cache-from", "tags", "platform", "secrets", "ssh", "attest":
 				if len(parts) == 2 {
 					o.ArrValue = append(o.ArrValue, parts[1])
 				}
@@ -558,6 +558,7 @@ type Target struct {
 	// Inherits is the only field that cannot be overridden with --set
 	Inherits []string `json:"inherits,omitempty" hcl:"inherits,optional"`
 
+	Attest           []string          `json:"attest,omitempty" hcl:"attest,optional"`
 	Context          *string           `json:"context,omitempty" hcl:"context,optional"`
 	Contexts         map[string]string `json:"contexts,omitempty" hcl:"contexts,optional"`
 	Dockerfile       *string           `json:"dockerfile,omitempty" hcl:"dockerfile,optional"`
@@ -583,6 +584,7 @@ type Target struct {
 }
 
 func (t *Target) normalize() {
+	t.Attest = removeDupes(t.Attest)
 	t.Tags = removeDupes(t.Tags)
 	t.Secrets = removeDupes(t.Secrets)
 	t.SSH = removeDupes(t.SSH)
@@ -636,6 +638,9 @@ func (t *Target) Merge(t2 *Target) {
 	if t2.Target != nil {
 		t.Target = t2.Target
 	}
+	if t2.Attest != nil { // merge
+		t.Attest = append(t.Attest, t2.Attest...)
+	}
 	if t2.Secrets != nil { // merge
 		t.Secrets = append(t.Secrets, t2.Secrets...)
 	}
@@ -718,6 +723,8 @@ func (t *Target) AddOverrides(overrides map[string]Override) error {
 			t.Platforms = o.ArrValue
 		case "output":
 			t.Outputs = o.ArrValue
+		case "attest":
+			t.Attest = append(t.Attest, o.ArrValue...)
 		case "no-cache":
 			noCache, err := strconv.ParseBool(value)
 			if err != nil {
@@ -971,6 +978,12 @@ func toBuildOpt(t *Target, inp *Input) (*build.Options, error) {
 	}
 	bo.Exports = outputs
 
+	attests, err := buildflags.ParseAttests(t.Attest)
+	if err != nil {
+		return nil, err
+	}
+	bo.Attests = attests
+
 	return bo, nil
 }
 

commands/bake.go

@@ -10,6 +10,7 @@ import (
 	"github.com/docker/buildx/bake"
 	"github.com/docker/buildx/build"
 	"github.com/docker/buildx/builder"
+	"github.com/docker/buildx/util/buildflags"
 	"github.com/docker/buildx/util/confutil"
 	"github.com/docker/buildx/util/dockerutil"
 	"github.com/docker/buildx/util/progress"
@@ -73,6 +74,12 @@ func runBake(dockerCli command.Cli, targets []string, in bakeOptions) (err error
 	if in.pull != nil {
 		overrides = append(overrides, fmt.Sprintf("*.pull=%t", *in.pull))
 	}
+	if in.sbom != "" {
+		overrides = append(overrides, fmt.Sprintf("*.attest=%s", buildflags.CanonicalizeAttest("sbom", in.sbom)))
+	}
+	if in.provenance != "" {
+		overrides = append(overrides, fmt.Sprintf("*.attest=%s", buildflags.CanonicalizeAttest("provenance", in.provenance)))
+	}
 	contextPathHash, _ := os.Getwd()
 
 	ctx2, cancel := context.WithCancel(context.TODO())
@@ -199,6 +206,8 @@ func bakeCmd(dockerCli command.Cli, rootOpts *rootOptions) *cobra.Command {
 	flags.BoolVar(&options.exportLoad, "load", false, `Shorthand for "--set=*.output=type=docker"`)
 	flags.BoolVar(&options.printOnly, "print", false, "Print the options without building")
 	flags.BoolVar(&options.exportPush, "push", false, `Shorthand for "--set=*.output=type=registry"`)
+	flags.StringVar(&options.sbom, "sbom", "", `Shorthand for "--set=*.attest=type=sbom"`)
+	flags.StringVar(&options.provenance, "provenance", "", `Shorthand for "--set=*.attest=type=provenance"`)
 	flags.StringArrayVar(&options.overrides, "set", nil, `Override target value (e.g., "targetpattern.key=value")`)
 
 	commonBuildFlags(&options.commonOptions, flags)

docs/reference/buildx_bake.md

@@ -22,8 +22,10 @@ Build from a file
 | [`--no-cache`](#no-cache) |  |  | Do not use cache when building the image |
 | [`--print`](#print) |  |  | Print the options without building |
 | [`--progress`](#progress) | `string` | `auto` | Set type of progress output (`auto`, `plain`, `tty`). Use plain to show container output |
+| `--provenance` | `string` |  | Shorthand for `--set=*.attest=type=provenance` |
 | [`--pull`](#pull) |  |  | Always attempt to pull all referenced images |
 | `--push` |  |  | Shorthand for `--set=*.output=type=registry` |
+| `--sbom` | `string` |  | Shorthand for `--set=*.attest=type=sbom` |
 | [`--set`](#set) | `stringArray` |  | Override target value (e.g., `targetpattern.key=value`) |