Creates Delete Blob Interface (#69)

Author: gbdubs

azure/azblob/azblob.go

@@ -87,6 +87,20 @@ func (c *Client) ReadBlob(ctx context.Context, uri string) (io.ReadCloser, error
 	return resp.Body, nil
 }
 
+func (c *Client) DeleteBlob(ctx context.Context, uri string) error {
+	ctr, blb, ok := blob.SplitURI(Scheme, uri)
+	if !ok {
+		return fmt.Errorf("malformed URI %q is not for Azure", uri)
+	}
+
+	_, err := c.client.DeleteBlob(ctx, ctr, blb, nil)
+	if err != nil {
+		return fmt.Errorf("failed to delete blob: %w", err)
+	}
+
+	return nil
+}
+
 // SignedUploadURL returns a URL that is allowed to upload to the given URI.
 // See https://pkg.go.dev/github.com/Azure/azure-sdk-for-go/sdk/storage/azblob@v1.0.0/sas#example-package-UserDelegationSAS
 func (c *Client) SignedUploadURL(ctx context.Context, uri string) (string, error) {

cmd/server/pactasrv/BUILD.bazel

@@ -8,6 +8,7 @@ go_library(
         "initiative_user_relationship.go",
         "pacta_version.go",
         "pactasrv.go",
+        "parallel.go",
         "portfolio.go",
         "upload.go",
         "user.go",

cmd/server/pactasrv/pactasrv.go

@@ -87,6 +87,7 @@ type Blob interface {
 	SignedUploadURL(ctx context.Context, uri string) (string, error)
 	// For downloading reports
 	SignedDownloadURL(ctx context.Context, uri string) (string, error)
+	DeleteBlob(ctx context.Context, uri string) error
 }
 
 type Server struct {

cmd/server/pactasrv/parallel.go

@@ -0,0 +1,24 @@
+package pactasrv
+
+import (
+	"context"
+	"fmt"
+)
+
+type blobDeleter interface {
+	DeleteBlob(ctx context.Context, uri string) error
+}
+
+func deleteBlobs(ctx context.Context, bd blobDeleter, uris []string) error {
+	// Implement parallel delete if slow - not prematurely optimizing.
+	for i, uri := range uris {
+		if err := bd.DeleteBlob(ctx, uri); err != nil {
+			return fmt.Errorf("deleting blob %d/%d: %w", i, len(uris), err)
+		}
+	}
+	return nil
+}
+
+func (s *Server) deleteBlobs(ctx context.Context, uris []string) error {
+	return deleteBlobs(ctx, s.Blob, uris)
+}