cleanups

pipeline/docker/docker.go

@@ -14,7 +14,10 @@ import (
 	"github.com/pkg/errors"
 )
 
-// Pipe for checksums
+// ErrNoDocker is shown when docker cannot be found in $PATH
+var ErrNoDocker = errors.New("docker not present in $PATH")
+
+// Pipe for docker
 type Pipe struct{}
 
 // Description of the pipe
@@ -23,13 +26,17 @@ func (Pipe) Description() string {
 }
 
 // Run the pipe
-func (Pipe) Run(ctx *context.Context) (err error) {
-	if ctx.Config.Dockers[0].Image == "" {
+func (Pipe) Run(ctx *context.Context) error {
+	if len(ctx.Config.Dockers) == 0 || ctx.Config.Dockers[0].Image == "" {
 		return pipeline.Skip("docker section is not configured")
 	}
 	if ctx.Config.Release.Draft {
 		return pipeline.Skip("release is marked as draft")
 	}
+	_, err := exec.LookPath("docker")
+	if err != nil {
+		return ErrNoDocker
+	}
 	for _, docker := range ctx.Config.Dockers {
 		var imagePlatform = docker.Goos + docker.Goarch + docker.Goarm
 		for platform, groups := range ctx.Binaries {

pipeline/pipe.go

@@ -12,6 +12,7 @@ type Pipe interface {
 	Run(ctx *context.Context) error
 }
 
+// IsSkip returns true if the error is an ErrSkip
 func IsSkip(err error) bool {
 	_, ok := err.(ErrSkip)
 	return ok

pipeline/pipe_test.go

@@ -1,6 +1,7 @@
 package pipeline
 
 import (
+	"errors"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -13,3 +14,9 @@ func TestSkipPipe(t *testing.T) {
 	assert.Error(err)
 	assert.Equal(reason, err.Error())
 }
+
+func TestIsSkip(t *testing.T) {
+	var assert = assert.New(t)
+	assert.True(IsSkip(Skip("whatever")))
+	assert.False(IsSkip(errors.New("nope")))
+}