koji: use nvra as the filename for images

We have the same thing for AWS. The AWS target also specifies under what name
should be the image available in EC2.

As requested by Brew maintainers Tomáš Kopeček and Lubomír Sedlář.

cmd/osbuild-worker/main.go

@@ -231,7 +231,7 @@ func RunJob(job worker.Job, store string, kojiServers map[string]koji.GSSAPICred
 				continue
 			}
 
-			hash, filesize, err := k.Upload(f, options.UploadDirectory, options.Filename)
+			hash, filesize, err := k.Upload(f, options.UploadDirectory, options.KojiFilename)
 			if err != nil {
 				r = append(r, err)
 				continue
@@ -274,7 +274,7 @@ func RunJob(job worker.Job, store string, kojiServers map[string]koji.GSSAPICred
 			output := []koji.Image{
 				{
 					BuildRootID:  1,
-					Filename:     options.Filename,
+					Filename:     options.KojiFilename,
 					FileSize:     uint64(filesize),
 					Arch:         common.CurrentArch(),
 					ChecksumType: "md5",

internal/kojiapi/server.go

@@ -8,9 +8,11 @@ import (
 	"log"
 	"net/http"
 	"net/url"
+	"strings"
 
 	"github.com/google/uuid"
 	"github.com/labstack/echo/v4"
+
 	"github.com/osbuild/osbuild-composer/internal/blueprint"
 	"github.com/osbuild/osbuild-composer/internal/common"
 	"github.com/osbuild/osbuild-composer/internal/distro"
@@ -88,6 +90,7 @@ func (h *apiHandlers) PostCompose(ctx echo.Context) error {
 		manifest     distro.Manifest
 		arch         string
 		filename     string
+		kojiFilename string
 	}
 	imageRequests := make([]imageRequest, len(request.ImageRequests))
 
@@ -131,6 +134,17 @@ func (h *apiHandlers) PostCompose(ctx echo.Context) error {
 		imageRequests[i].manifest = manifest
 		imageRequests[i].arch = arch.Name()
 		imageRequests[i].filename = imageType.Filename()
+
+		filename := fmt.Sprintf(
+			"%s-%s-%s.%s%s",
+			request.Name,
+			request.Version,
+			request.Release,
+			ir.Architecture,
+			splitExtension(imageType.Filename()),
+		)
+
+		imageRequests[i].kojiFilename = filename
 	}
 
 	var ir imageRequest
@@ -176,6 +190,7 @@ func (h *apiHandlers) PostCompose(ctx echo.Context) error {
 			Filename:        ir.filename,
 			UploadDirectory: "osbuild-composer-koji-" + uuid.New().String(),
 			Server:          request.Koji.Server,
+			KojiFilename:    ir.kojiFilename,
 		}),
 	})
 	if err != nil {
@@ -189,6 +204,25 @@ func (h *apiHandlers) PostCompose(ctx echo.Context) error {
 	})
 }
 
+// splitExtension returns the extension of the given file. If there's
+// a multipart extension (e.g. file.tar.gz), it returns all parts (e.g.
+// .tar.gz). If there's no extension in the input, it returns an empty
+// string. If the filename starts with dot, the part before the second dot
+// is not considered as an extension.
+func splitExtension(filename string) string {
+	filenameParts := strings.Split(filename, ".")
+
+	if len(filenameParts) > 0 && filenameParts[0] == "" {
+		filenameParts = filenameParts[1:]
+	}
+
+	if len(filenameParts) <= 1 {
+		return ""
+	}
+
+	return "." + strings.Join(filenameParts[1:], ".")
+}
+
 func composeStateToStatus(state common.ComposeState) string {
 	switch state {
 	case common.CFailed:

internal/kojiapi/server_internal_test.go

@@ -0,0 +1,24 @@
+package kojiapi
+
+import (
+	"github.com/stretchr/testify/require"
+	"testing"
+)
+
+func TestSplitExtension(t *testing.T) {
+	tests := []struct {
+		filename  string
+		extension string
+	}{
+		{filename: "image.qcow2", extension: ".qcow2"},
+		{filename: "image.tar.gz", extension: ".tar.gz"},
+		{filename: "", extension: ""},
+		{filename: ".htaccess", extension: ""},
+		{filename: ".weirdfile.txt", extension: ".txt"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.filename, func(t *testing.T) {
+			require.Equal(t, tt.extension, splitExtension(tt.filename))
+		})
+	}
+}

internal/target/koji_target.go

@@ -10,6 +10,7 @@ type KojiTargetOptions struct {
 	Filename        string `json:"filename"`
 	UploadDirectory string `json:"upload_directory"`
 	Server          string `json:"server"`
+	KojiFilename    string `json:"koji_filename"`
 }
 
 func (KojiTargetOptions) isTargetOptions() {}