Add a platform.ParseAll helper

Signed-off-by: Jin Dong <djdongjin95@gmail.com>

client.go

@@ -403,13 +403,9 @@ func (c *Client) Fetch(ctx context.Context, ref string, opts ...RemoteOpt) (imag
 		if len(fetchCtx.Platforms) == 0 {
 			fetchCtx.PlatformMatcher = platforms.All
 		} else {
-			var ps []ocispec.Platform
+			ps, err := platforms.ParseAll(fetchCtx.Platforms)
-			for _, s := range fetchCtx.Platforms {
+			if err != nil {
-				p, err := platforms.Parse(s)
+				return images.Image{}, err
-				if err != nil {
-					return images.Image{}, fmt.Errorf("invalid platform %s: %w", s, err)
-				}
-				ps = append(ps, p)
 			}
 
 			fetchCtx.PlatformMatcher = platforms.Any(ps...)
@@ -439,13 +435,9 @@ func (c *Client) Push(ctx context.Context, ref string, desc ocispec.Descriptor,
 	}
 	if pushCtx.PlatformMatcher == nil {
 		if len(pushCtx.Platforms) > 0 {
-			var ps []ocispec.Platform
+			ps, err := platforms.ParseAll(pushCtx.Platforms)
-			for _, platform := range pushCtx.Platforms {
+			if err != nil {
-				p, err := platforms.Parse(platform)
+				return err
-				if err != nil {
-					return fmt.Errorf("invalid platform %s: %w", platform, err)
-				}
-				ps = append(ps, p)
 			}
 			pushCtx.PlatformMatcher = platforms.Any(ps...)
 		} else {

cmd/ctr/commands/images/convert.go

@@ -24,7 +24,6 @@ import (
 	"github.com/containerd/containerd/images/converter"
 	"github.com/containerd/containerd/images/converter/uncompress"
 	"github.com/containerd/containerd/platforms"
-	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
 	"github.com/urfave/cli"
 )
 
@@ -70,13 +69,9 @@ When '--all-platforms' is given all images in a manifest list must be available.
 
 		if !context.Bool("all-platforms") {
 			if pss := context.StringSlice("platform"); len(pss) > 0 {
-				var all []ocispec.Platform
+				all, err := platforms.ParseAll(pss)
-				for _, ps := range pss {
+				if err != nil {
-					p, err := platforms.Parse(ps)
+					return err
-					if err != nil {
-						return fmt.Errorf("invalid platform %q: %w", ps, err)
-					}
-					all = append(all, p)
 				}
 				convertOpts = append(convertOpts, converter.WithPlatform(platforms.Ordered(all...)))
 			} else {

cmd/ctr/commands/images/export.go

@@ -22,7 +22,6 @@ import (
 	"io"
 	"os"
 
-	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
 	"github.com/urfave/cli"
 
 	"github.com/containerd/containerd/cmd/ctr/commands"
@@ -133,13 +132,9 @@ When '--all-platforms' is given all images in a manifest list must be available.
 		}
 
 		if pss := context.StringSlice("platform"); len(pss) > 0 {
-			var all []ocispec.Platform
+			all, err := platforms.ParseAll(pss)
-			for _, ps := range pss {
+			if err != nil {
-				p, err := platforms.Parse(ps)
+				return err
-				if err != nil {
-					return fmt.Errorf("invalid platform %q: %w", ps, err)
-				}
-				all = append(all, p)
 			}
 			exportOpts = append(exportOpts, archive.WithPlatform(platforms.Ordered(all...)))
 		} else {

cmd/ctr/commands/images/pull.go

@@ -101,13 +101,9 @@ command. As part of this process, we do the following:
 
 			var sopts []image.StoreOpt
 			if !context.Bool("all-platforms") {
-				var p []ocispec.Platform
+				p, err := platforms.ParseAll(context.StringSlice("platform"))
-				for _, s := range context.StringSlice("platform") {
+				if err != nil {
-					ps, err := platforms.Parse(s)
+					return err
-					if err != nil {
-						return fmt.Errorf("unable to parse platform %s: %w", s, err)
-					}
-					p = append(p, ps)
 				}
 				if len(p) == 0 {
 					p = append(p, platforms.DefaultSpec())
@@ -168,12 +164,9 @@ command. As part of this process, we do the following:
 				return fmt.Errorf("unable to resolve image platforms: %w", err)
 			}
 		} else {
-			for _, s := range context.StringSlice("platform") {
+			p, err = platforms.ParseAll(context.StringSlice("platform"))
-				ps, err := platforms.Parse(s)
+			if err != nil {
-				if err != nil {
+				return err
-					return fmt.Errorf("unable to parse platform %s: %w", s, err)
-				}
-				p = append(p, ps)
 			}
 		}
 		if len(p) == 0 {

pkg/transfer/local/push.go

@@ -37,13 +37,9 @@ func (ts *localTransferService) push(ctx context.Context, ig transfer.ImageGette
 		// TODO: Platform matching
 		if pushCtx.PlatformMatcher == nil {
 			if len(pushCtx.Platforms) > 0 {
-				var ps []ocispec.Platform
+				ps, err := platforms.ParseAll(pushCtx.Platforms)
-				for _, platform := range pushCtx.Platforms {
+				if err != nil {
-					p, err := platforms.Parse(platform)
+					return err
-					if err != nil {
-						return fmt.Errorf("invalid platform %s: %w", platform, err)
-					}
-					ps = append(ps, p)
 				}
 				pushCtx.PlatformMatcher = platforms.Any(ps...)
 			} else {

platforms/platforms.go

@@ -158,6 +158,19 @@ func (m *matcher) String() string {
 	return Format(m.Platform)
 }
 
+// ParseAll parses a list of platform specifiers into a list of platform.
+func ParseAll(specifiers []string) ([]specs.Platform, error) {
+	platforms := make([]specs.Platform, len(specifiers))
+	for i, s := range specifiers {
+		p, err := Parse(s)
+		if err != nil {
+			return nil, fmt.Errorf("invalid platform %s: %w", s, err)
+		}
+		platforms[i] = p
+	}
+	return platforms, nil
+}
+
 // Parse parses the platform specifier syntax into a platform declaration.
 //
 // Platform specifiers are in the format `<os>|<arch>|<os>/<arch>[/<variant>]`.

runtime/v2/manager.go

@@ -39,7 +39,6 @@ import (
 	"github.com/containerd/containerd/runtime"
 	shimbinary "github.com/containerd/containerd/runtime/v2/shim"
 	"github.com/containerd/containerd/sandbox"
-	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
 )
 
 // Config for the v2 runtime
@@ -63,7 +62,7 @@ func init() {
 		},
 		InitFn: func(ic *plugin.InitContext) (interface{}, error) {
 			config := ic.Config.(*Config)
-			supportedPlatforms, err := parsePlatforms(config.Platforms)
+			supportedPlatforms, err := platforms.ParseAll(config.Platforms)
 			if err != nil {
 				return nil, err
 			}
@@ -387,18 +386,6 @@ func (m *ShimManager) Delete(ctx context.Context, id string) error {
 	return err
 }
 
-func parsePlatforms(platformStr []string) ([]ocispec.Platform, error) {
-	p := make([]ocispec.Platform, len(platformStr))
-	for i, v := range platformStr {
-		parsed, err := platforms.Parse(v)
-		if err != nil {
-			return nil, err
-		}
-		p[i] = parsed
-	}
-	return p, nil
-}
-
 // TaskManager wraps task service client on top of shim manager.
 type TaskManager struct {
 	manager *ShimManager