main: add upload support directly to build

This commit adds support to upload the build image directly to
the target cloud. Currently only ami/AWS is supported.

If the cloud specific configuration is given at the commandline
and the image type is a cloud image the cloud upload will happen
automatically (just like with bib). Incomplete upload config is
an error.

cmd/image-builder/upload.go

@@ -0,0 +1,132 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"os"
+
+	"github.com/cheggaaa/pb/v3"
+	"github.com/spf13/cobra"
+
+	"github.com/osbuild/bootc-image-builder/bib/pkg/progress"
+	"github.com/osbuild/images/pkg/cloud"
+	"github.com/osbuild/images/pkg/cloud/awscloud"
+)
+
+type MissingUploadConfigError struct {
+	missing    []string
+	allMissing bool
+}
+
+func (e *MissingUploadConfigError) Error() string {
+	return fmt.Sprintf("missing upload configuration: %q", e.missing)
+}
+
+type UploadTypeUnsupportedError struct {
+	typ string
+}
+
+func (e *UploadTypeUnsupportedError) Error() string {
+	return fmt.Sprintf("unsupported upload type %q", e.typ)
+}
+
+var awscloudNewUploader = awscloud.NewUploader
+
+func uploadImageWithProgress(uploader cloud.Uploader, imagePath string) error {
+	f, err := os.Open(imagePath)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	// setup basic progress
+	st, err := f.Stat()
+	if err != nil {
+		return fmt.Errorf("cannot stat upload: %v", err)
+	}
+	pbar := pb.New64(st.Size())
+	pbar.Set(pb.Bytes, true)
+	pbar.SetWriter(osStdout)
+	r := pbar.NewProxyReader(f)
+	pbar.Start()
+	defer pbar.Finish()
+
+	return uploader.UploadAndRegister(r, osStderr)
+}
+
+func uploaderCheckWithProgress(pbar progress.ProgressBar, uploader cloud.Uploader) error {
+	pr, pw := io.Pipe()
+	defer pw.Close()
+
+	go func() {
+		scanner := bufio.NewScanner(pr)
+		for scanner.Scan() {
+			pbar.SetMessagef("%s", scanner.Text())
+		}
+	}()
+	return uploader.Check(pw)
+}
+
+func uploaderFor(cmd *cobra.Command, typeOrCloud string) (cloud.Uploader, error) {
+	switch typeOrCloud {
+	case "ami", "aws":
+		return uploaderForCmdAWS(cmd)
+	default:
+		return nil, &UploadTypeUnsupportedError{typeOrCloud}
+	}
+
+}
+
+func uploaderForCmdAWS(cmd *cobra.Command) (cloud.Uploader, error) {
+	amiName, err := cmd.Flags().GetString("aws-ami-name")
+	if err != nil {
+		return nil, err
+	}
+	bucketName, err := cmd.Flags().GetString("aws-bucket")
+	if err != nil {
+		return nil, err
+	}
+	region, err := cmd.Flags().GetString("aws-region")
+	if err != nil {
+		return nil, err
+	}
+
+	var missing []string
+	requiredArgs := []string{"aws-ami-name", "aws-bucket", "aws-region"}
+	for _, argName := range requiredArgs {
+		arg, err := cmd.Flags().GetString(argName)
+		if err != nil {
+			return nil, err
+		}
+		if arg == "" {
+			missing = append(missing, fmt.Sprintf("--%s", argName))
+		}
+	}
+	if len(missing) > 0 {
+		return nil, &MissingUploadConfigError{
+			missing:    missing,
+			allMissing: len(missing) == len(requiredArgs),
+		}
+	}
+
+	return awscloudNewUploader(region, bucketName, amiName, nil)
+}
+
+func cmdUpload(cmd *cobra.Command, args []string) error {
+	uploadTo, err := cmd.Flags().GetString("to")
+	if err != nil {
+		return err
+	}
+	if uploadTo == "" {
+		return fmt.Errorf("missing --to parameter, try --to=aws")
+	}
+
+	imagePath := args[0]
+	uploader, err := uploaderFor(cmd, uploadTo)
+	if err != nil {
+		return err
+	}
+
+	return uploadImageWithProgress(uploader, imagePath)
+}