Re-implement bars when fetching remote OCI images via ggcr

internal/pkg/build/sources/conveyorPacker_oci.go

@@ -128,6 +128,7 @@ type OCIConveyorPacker struct {
 
 // Get downloads container information from the specified source
 func (cp *OCIConveyorPacker) Get(ctx context.Context, b *sytypes.Bundle) (err error) {
+	sylog.Infof("Fetching OCI image...")
 	cp.b = b
 
 	cp.topts = &ociimage.TransportOptions{
@@ -190,11 +191,13 @@ func (cp *OCIConveyorPacker) Get(ctx context.Context, b *sytypes.Bundle) (err er
 
 // Pack puts relevant objects in a Bundle.
 func (cp *OCIConveyorPacker) Pack(ctx context.Context) (*sytypes.Bundle, error) {
+	sylog.Infof("Extracting OCI image...")
 	err := cp.unpackRootfs(ctx)
 	if err != nil {
 		return nil, fmt.Errorf("while unpacking rootfs: %v", err)
 	}
 
+	sylog.Infof("Inserting Apptainer configuration...")
 	err = cp.insertBaseEnv()
 	if err != nil {
 		return nil, fmt.Errorf("while inserting base environment: %v", err)

internal/pkg/client/progress.go

@@ -29,29 +29,22 @@ var defaultOption = []mpb.BarOption{
 	),
 }
 
+var unknownSizeOption = []mpb.BarOption{
+	mpb.PrependDecorators(
+		decor.Current(decor.SizeB1024(0), "%.1f / ???"),
+	),
+	mpb.AppendDecorators(
+		decor.AverageSpeed(decor.SizeB1024(0), " % .1f "),
+	),
+}
+
 func initProgressBar(totalSize int64) (*mpb.Progress, *mpb.Bar) {
 	p := mpb.New()
 
 	if totalSize > 0 {
-		return p, p.AddBar(totalSize,
-			mpb.PrependDecorators(
-				decor.Counters(decor.SizeB1024(0), "%.1f / %.1f"),
-			),
-			mpb.AppendDecorators(
-				decor.Percentage(),
-				decor.AverageSpeed(decor.SizeB1024(0), " % .1f "),
-				decor.AverageETA(decor.ET_STYLE_GO),
-			),
-		)
+		return p, p.AddBar(totalSize, defaultOption...)
 	}
-	return p, p.AddBar(totalSize,
-		mpb.PrependDecorators(
-			decor.Current(decor.SizeB1024(0), "%.1f / ???"),
-		),
-		mpb.AppendDecorators(
-			decor.AverageSpeed(decor.SizeB1024(0), " % .1f "),
-		),
-	)
+	return p, p.AddBar(totalSize, unknownSizeOption...)
 }
 
 // See: https://ixday.github.io/post/golang-cancel-copy/

internal/pkg/client/progress_roundtrip.go

@@ -28,6 +28,15 @@ type RoundTripper struct {
 	sizes []int64
 }
 
+// NewRoundTripper wraps inner (or http.DefaultTransport if inner is nil) with
+// progress bar functionality. A separate bar will be displayed for every GET
+// request that returns a body >64KiB, updated as the response body is read. The
+// caller is responsible for calling rt.ProgressWait / rt.ProgressShutdown when
+// all requests are completed, so that the mpb progress container exits
+// correctly. Note that if requests are made, but the response body is not
+// read, the progress bar will remain 'stuck', preventing rt.ProgressWait
+// from returning. rt.ProgressComplete is provided to override all bars to be
+// 100% complete, to satisfy rt.ProgressWait where appropriate.
 func NewRoundTripper(ctx context.Context, inner http.RoundTripper) *RoundTripper {
 	if inner == nil {
 		inner = http.DefaultTransport

internal/pkg/ociimage/fetch.go

@@ -22,14 +22,15 @@ import (
 	"strings"
 
 	"github.com/apptainer/apptainer/internal/pkg/cache"
+	progressClient "github.com/apptainer/apptainer/internal/pkg/client"
 	"github.com/apptainer/apptainer/pkg/sylog"
 	ggcrv1 "github.com/google/go-containerregistry/pkg/v1"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 )
 
-// CachedImage will ensure that the provided v1.Image is present in the Apptainer
+// cachedImage will ensure that the provided v1.Image is present in the Apptainer
 // OCI cache layout dir, and return a new v1.Image pointing to the cached copy.
-func CachedImage(ctx context.Context, imgCache *cache.Handle, srcImg v1.Image) (v1.Image, error) {
+func cachedImage(ctx context.Context, imgCache *cache.Handle, srcImg v1.Image) (v1.Image, error) {
 	if imgCache == nil || imgCache.IsDisabled() {
 		return nil, fmt.Errorf("undefined image cache")
 	}
@@ -46,10 +47,11 @@ func CachedImage(ctx context.Context, imgCache *cache.Handle, srcImg v1.Image) (
 
 	cachedRef := layoutDir + "@" + digest.String()
 	sylog.Debugf("Caching image to %s", cachedRef)
+	if err := OCISourceSink.WriteImage(srcImg, layoutDir, nil); err != nil {
+		return nil, err
+	}
 
-	OCISourceSink.WriteImage(srcImg, layoutDir)
-
-	return OCISourceSink.Image(ctx, cachedRef, nil)
+	return OCISourceSink.Image(ctx, cachedRef, nil, nil)
 }
 
 // FetchToLayout will fetch the OCI image specified by imageRef to an OCI layout
@@ -87,14 +89,24 @@ func FetchToLayout(ctx context.Context, tOpts *TransportOptions, imgCache *cache
 		return nil, err
 	}
 
-	srcImg, err := srcType.Image(ctx, srcRef, tOpts)
+	rt := progressClient.NewRoundTripper(ctx, nil)
+
+	srcImg, err := srcType.Image(ctx, srcRef, tOpts, rt)
 	if err != nil {
+		rt.ProgressShutdown()
 		return nil, err
 	}
 
 	if imgCache != nil && !imgCache.IsDisabled() {
 		// Ensure the image is cached, and return reference to the cached image.
-		return CachedImage(ctx, imgCache, srcImg)
+		cachedImg, err := cachedImage(ctx, imgCache, srcImg)
+		if err != nil {
+			rt.ProgressShutdown()
+			return nil, err
+		}
+		rt.ProgressComplete()
+		rt.ProgressWait()
+		return cachedImg, nil
 	}
 
 	// No cache - write to layout directory provided
@@ -103,11 +115,14 @@ func FetchToLayout(ctx context.Context, tOpts *TransportOptions, imgCache *cache
 		return nil, err
 	}
 	sylog.Debugf("Copying %q to temporary layout at %q", srcRef, tmpLayout)
-	if err = OCISourceSink.WriteImage(srcImg, tmpLayout); err != nil {
+	if err = OCISourceSink.WriteImage(srcImg, tmpLayout, nil); err != nil {
+		rt.ProgressShutdown()
 		return nil, err
 	}
+	rt.ProgressComplete()
+	rt.ProgressWait()
 
-	return OCISourceSink.Image(ctx, tmpLayout, tOpts)
+	return OCISourceSink.Image(ctx, tmpLayout, tOpts, nil)
 }
 
 // Perform a dumb tar(gz) extraction with no chown, id remapping etc.

internal/pkg/ociimage/sourcesink.go

@@ -14,6 +14,7 @@ import (
 	"fmt"
 	"strings"
 
+	progressClient "github.com/apptainer/apptainer/internal/pkg/client"
 	"github.com/apptainer/apptainer/internal/pkg/util/ociauth"
 	"github.com/apptainer/apptainer/pkg/sylog"
 	"github.com/docker/docker/client"
@@ -36,7 +37,7 @@ const (
 	DaemonSourceSink
 )
 
-func getDockerImage(ctx context.Context, src string, tOpts *TransportOptions) (v1.Image, error) {
+func getDockerImage(ctx context.Context, src string, tOpts *TransportOptions, rt *progressClient.RoundTripper) (v1.Image, error) {
 	var nameOpts []name.Option
 	if tOpts != nil && tOpts.Insecure {
 		nameOpts = append(nameOpts, name.Insecure)
@@ -57,6 +58,10 @@ func getDockerImage(ctx context.Context, src string, tOpts *TransportOptions) (v
 			ociauth.AuthOptn(tOpts.AuthConfig, tOpts.AuthFilePath))
 	}
 
+	if rt != nil {
+		pullOpts = append(pullOpts, remote.WithTransport(rt))
+	}
+
 	return remote.Image(srcRef, pullOpts...)
 }
 
@@ -145,10 +150,10 @@ func (ss SourceSink) Reference(s string, tOpts *TransportOptions) (name.Referenc
 	}
 }
 
-func (ss SourceSink) Image(ctx context.Context, ref string, tOpts *TransportOptions) (v1.Image, error) {
+func (ss SourceSink) Image(ctx context.Context, ref string, tOpts *TransportOptions, rt *progressClient.RoundTripper) (v1.Image, error) {
 	switch ss {
 	case RegistrySourceSink:
-		return getDockerImage(ctx, ref, tOpts)
+		return getDockerImage(ctx, ref, tOpts, rt)
 	case TarballSourceSink:
 		return tarball.ImageFromPath(ref, nil)
 	case OCISourceSink:
@@ -162,7 +167,7 @@ func (ss SourceSink) Image(ctx context.Context, ref string, tOpts *TransportOpti
 	}
 }
 
-func (ss SourceSink) WriteImage(img v1.Image, dstName string) error {
+func (ss SourceSink) WriteImage(img v1.Image, dstName string, tOpts *TransportOptions) error {
 	switch ss {
 	case OCISourceSink:
 		lp, err := layout.FromPath(dstName)
@@ -173,8 +178,32 @@ func (ss SourceSink) WriteImage(img v1.Image, dstName string) error {
 			}
 		}
 		return lp.AppendImage(img)
+
+	case RegistrySourceSink:
+		var nameOpts []name.Option
+		if tOpts != nil && tOpts.Insecure {
+			nameOpts = append(nameOpts, name.Insecure)
+		}
+		dstRef, err := name.ParseReference(dstName, nameOpts...)
+		if err != nil {
+			return err
+		}
+		remoteOpts := []remote.Option{}
+		if tOpts != nil {
+			remoteOpts = append(remoteOpts,
+				remote.WithPlatform(tOpts.Platform),
+				ociauth.AuthOptn(tOpts.AuthConfig, tOpts.AuthFilePath))
+		}
+		return remote.Write(dstRef, img, remoteOpts...)
+
+	case TarballSourceSink:
+		// Only supports writing a single image per tarball.
+		dstRef := name.MustParseReference("image")
+		return tarball.WriteToFile(dstName, dstRef, img)
+
 	case UnknownSourceSink:
 		return errUnsupportedTransport
+
 	default:
 		return errUnsupportedTransport
 	}