file provisioner: download should create all dirs in the destination path

provisioner/file/provisioner.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"path/filepath"
 	"strings"
 
 	"github.com/mitchellh/packer/common"
@@ -95,12 +96,20 @@ func (p *Provisioner) Provision(ui packer.Ui, comm packer.Communicator) error {
 func (p *Provisioner) ProvisionDownload(ui packer.Ui, comm packer.Communicator) error {
 	for _, src := range p.config.Sources {
 		ui.Say(fmt.Sprintf("Downloading %s => %s", src, p.config.Destination))
-
-		if strings.HasSuffix(p.config.Destination, "/") {
-			err := os.MkdirAll(p.config.Destination, os.FileMode(0755))
+		// ensure destination dir exists.  p.config.Destination may either be a file or a dir.
+		dir := p.config.Destination
+		// if it doesn't end with a /, set dir as the parent dir
+		if !strings.HasSuffix(p.config.Destination, "/") {
+			dir = filepath.Dir(dir)
+		}
+		if dir != "" {
+			err := os.MkdirAll(dir, os.FileMode(0755))
 			if err != nil {
 				return err
 			}
+		}
+		// if the config.Destination was a dir, download the dir
+		if !strings.HasSuffix(p.config.Destination, "/") {
 			return comm.DownloadDir(src, p.config.Destination, nil)
 		}
 

provisioner/file/provisioner_test.go

@@ -1,11 +1,14 @@
 package file
 
 import (
-	"github.com/mitchellh/packer/packer"
+	"fmt"
 	"io/ioutil"
 	"os"
+	"path/filepath"
 	"strings"
 	"testing"
+
+	"github.com/mitchellh/packer/packer"
 )
 
 func testConfig() map[string]interface{} {
@@ -139,3 +142,57 @@ func TestProvisionerProvision_SendsFile(t *testing.T) {
 		t.Fatalf("should upload with source file's data")
 	}
 }
+
+func TestProvisionDownloadMkdirAll(t *testing.T) {
+	tests := []struct {
+		path string
+	}{
+		{"dir"},
+		{"dir/"},
+		{"dir/subdir"},
+		{"dir/subdir/"},
+		{"path/to/dir"},
+		{"path/to/dir/"},
+	}
+	tmpDir, err := ioutil.TempDir("", "packer-file")
+	if err != nil {
+		t.Fatalf("error tempdir: %s", err)
+	}
+	defer os.RemoveAll(tmpDir)
+	tf, err := ioutil.TempFile(tmpDir, "packer")
+	if err != nil {
+		t.Fatalf("error tempfile: %s", err)
+	}
+	fmt.Println(tf.Name())
+	defer os.Remove(tf.Name())
+
+	config := map[string]interface{}{
+		"source": tf.Name(),
+	}
+	var p Provisioner
+	for _, test := range tests {
+		path := filepath.Join(tmpDir, test.path)
+		config["destination"] = filepath.Join(path, "something")
+		if err := p.Prepare(config); err != nil {
+			t.Fatalf("err: %s", err)
+		}
+		ui := &stubUi{}
+		comm := &packer.MockCommunicator{}
+		err = p.ProvisionDownload(ui, comm)
+		if err != nil {
+			t.Fatalf("should successfully provision: %s", err)
+		}
+
+		if !strings.Contains(ui.sayMessages, tf.Name()) {
+			t.Fatalf("should print source filename")
+		}
+
+		if !strings.Contains(ui.sayMessages, "something") {
+			t.Fatalf("should print destination filename")
+		}
+
+		if _, err := os.Stat(path); err != nil {
+			t.Fatalf("stat of download dir should not error: %s", err)
+		}
+	}
+}