Add support for OCI upload provider

Signed-off-by: Roy Golan <rgolan@redhat.com>

cmd/osbuild-upload-oci/main.go

@@ -0,0 +1,104 @@
+package main
+
+import (
+	"crypto/rand"
+	"fmt"
+	"github.com/osbuild/osbuild-composer/internal/upload/oci"
+	"github.com/spf13/cobra"
+	"io/ioutil"
+	"math"
+	"math/big"
+	"os"
+)
+
+var (
+	tenancy         string
+	region          string
+	userID          string
+	privateKeyFile  string
+	fingerprint     string
+	bucketName      string
+	bucketNamespace string
+	fileName        string
+	objectName      string
+	compartment     string
+)
+
+var uploadCmd = &cobra.Command{
+	Example:      "This tool uses the $HOME/.oci/config file to create the OCI client and can be\noverridden using CLI flags.",
+	SilenceUsage: true,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		uploader, err := uploaderFromConfig()
+		if err != nil {
+			return err
+		}
+
+		file, err := os.Open(fileName)
+		if err != nil {
+			return err
+		}
+		defer file.Close()
+
+		imageID, err := uploader.Upload(objectName, bucketName, bucketNamespace, file, compartment, fileName)
+		if err != nil {
+			return fmt.Errorf("failed to upload the image: %v", err)
+		}
+
+		fmt.Printf("Image %s was uploaded and created successfully\n", imageID)
+		return nil
+	},
+}
+
+func main() {
+	i, _ := rand.Int(rand.Reader, big.NewInt(math.MaxInt64))
+	uploadCmd.Flags().StringVarP(&tenancy, "tenancy", "t", "", "target tenancy")
+	uploadCmd.Flags().StringVarP(&region, "region", "r", "", "target region")
+	uploadCmd.Flags().StringVarP(&userID, "user-id", "u", "", "user OCI ID")
+	uploadCmd.Flags().StringVarP(&bucketName, "bucket-name", "b", "", "target OCI bucket name")
+	uploadCmd.Flags().StringVarP(&bucketNamespace, "bucket-namespace", "", "", "target OCI bucket namespace")
+	uploadCmd.Flags().StringVarP(&fileName, "filename", "f", "", "image file to upload")
+	uploadCmd.Flags().StringVarP(&objectName, "object-name", "o", fmt.Sprintf("osbuild-upload-%v", i), "the target name of the uploaded object in the bucket")
+	uploadCmd.Flags().StringVarP(&privateKeyFile, "private-key", "p", "", "private key for authenticating OCI API requests")
+	uploadCmd.Flags().StringVarP(&fingerprint, "fingerprint", "", "", "the private key's fingerprint")
+	uploadCmd.Flags().StringVarP(&compartment, "compartment-id", "c", "", "the compartment ID of the target image")
+	_ = uploadCmd.MarkFlagRequired("bucket-name")
+	_ = uploadCmd.MarkFlagRequired("bucket-namespace")
+	_ = uploadCmd.MarkFlagRequired("compartment-id")
+	_ = uploadCmd.MarkFlagRequired("filename")
+	if err := uploadCmd.Execute(); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
+
+func uploaderFromConfig() (oci.Uploader, error) {
+	if privateKeyFile != "" {
+		if tenancy == "" || region == "" || userID == "" || fingerprint == "" {
+			return nil, fmt.Errorf("when suppling a private key the following args are mandatory as well:" +
+				" fingerprint, tenancy, region, and user-id")
+		}
+		pk, err := ioutil.ReadFile(privateKeyFile)
+		if err != nil {
+			return nil, fmt.Errorf("failed to read private key file %w", err)
+		}
+		uploader, err := oci.NewClient(
+			&oci.ClientParams{
+				Tenancy:     tenancy,
+				User:        userID,
+				Region:      region,
+				PrivateKey:  string(pk),
+				Fingerprint: fingerprint,
+			})
+		if err != nil {
+			return nil, fmt.Errorf("failed to create an OCI client %w", err)
+		}
+		return uploader, nil
+	}
+
+	fmt.Printf("Creating an uploader from default config\n")
+	uploader, err := oci.NewClient(nil)
+	if err != nil {
+		return nil, err
+	}
+	return uploader, nil
+}