artifact: improve String() representation

FileArtifact: returns the relative path from the application directory
              to the artifact
DockerArtifact: returns the repository name on String()

app.go

@@ -67,6 +67,7 @@ func (a *App) setS3ArtifactsFromCFG(cfg *cfg.App) error {
 		url := "s3://" + ar.Bucket + "/" + destFile
 
 		a.Artifacts = append(a.Artifacts, &FileArtifact{
+			RelPath:   ar.Path,
 			Path:      path.Join(a.Dir, ar.Path),
 			DestFile:  destFile,
 			UploadURL: url,

artifact.go

@@ -8,6 +8,7 @@ import (
 type Artifact interface {
 	Exists() bool
 	UploadJob() (upload.Job, error)
+	Name() string
 	String() string
 	LocalPath() string
 	UploadDestination() string

dockerartifact.go

@@ -48,16 +48,21 @@ func (d *DockerArtifact) UploadJob() (upload.Job, error) {
 	}, nil
 }
 
-// String returns the string representation of the artifact
+// String returns the absolute path to the ImageID file
 func (d *DockerArtifact) String() string {
-	return d.ImageIDFile
+	return d.LocalPath()
 }
 
 // LocalPath returns the local path to the artifact
 func (d *DockerArtifact) LocalPath() string {
 	return d.ImageIDFile
 }
 
+// Name returns the docker repository name
+func (d *DockerArtifact) Name() string {
+	return d.Repository
+}
+
 // UploadDestination returns the upload destination
 func (d *DockerArtifact) UploadDestination() string {
 	return fmt.Sprintf("docker: %s:%s", d.Repository, d.Tag)

fileartifact.go

@@ -7,6 +7,7 @@ import (
 
 // FileArtifact is a file build artifact
 type FileArtifact struct {
+	RelPath   string
 	Path      string
 	DestFile  string
 	UploadURL string
@@ -19,7 +20,7 @@ func (f *FileArtifact) Exists() bool {
 
 // String returns the String representation
 func (f *FileArtifact) String() string {
-	return f.Path
+	return f.Name()
 }
 
 // UploadJob returns a upload.DockerJob for the artifact
@@ -35,6 +36,11 @@ func (f *FileArtifact) LocalPath() string {
 	return f.Path
 }
 
+// Name returns the path to the artifact relatively to application dir
+func (f *FileArtifact) Name() string {
+	return f.RelPath
+}
+
 // UploadDestination returns the upload destination
 func (f *FileArtifact) UploadDestination() string {
 	return f.UploadURL