communicator/ssh: refactor to upload directories properly

communicator/ssh/communicator.go

@@ -10,6 +10,7 @@ import (
 	"io"
 	"log"
 	"net"
+	"os"
 	"path/filepath"
 )
 
@@ -105,41 +106,29 @@ func (c *comm) Upload(path string, input io.Reader) error {
 	target_dir = filepath.ToSlash(target_dir)
 
 	scpFunc := func(w io.Writer, stdoutR *bufio.Reader) error {
-		// Determine the length of the upload content by copying it
-		// into an in-memory buffer. Note that this means what we upload
-		// must fit into memory.
-		log.Println("Copying input data into in-memory buffer so we can get the length")
-		input_memory := new(bytes.Buffer)
-		if _, err := io.Copy(input_memory, input); err != nil {
-			return err
-		}
-
-		// Start the protocol
-		log.Println("Beginning file upload...")
-		fmt.Fprintln(w, "C0644", input_memory.Len(), target_file)
-		err := checkSCPStatus(stdoutR)
-		if err != nil {
-			return err
-		}
-
-		if _, err := io.Copy(w, input_memory); err != nil {
-			return err
-		}
-
-		fmt.Fprint(w, "\x00")
-		err = checkSCPStatus(stdoutR)
-		if err != nil {
-			return err
-		}
-
-		return nil
+		return scpUploadFile(target_file, input, w, stdoutR)
 	}
 
 	return c.scpSession("scp -vt "+target_dir, scpFunc)
 }
 
 func (c *comm) UploadDir(dst string, src string, excl []string) error {
-	return nil
+	f, err := os.Open(src)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	entries, err := f.Readdir(-1)
+	if err != nil {
+		return err
+	}
+
+	scpFunc := func(w io.Writer, r *bufio.Reader) error {
+		return scpUploadDir(src, entries, w, r)
+	}
+
+	return c.scpSession("scp -rvt "+dst, scpFunc)
 }
 
 func (c *comm) Download(string, io.Writer) error {
@@ -290,3 +279,107 @@ func checkSCPStatus(r *bufio.Reader) error {
 
 	return nil
 }
+
+func scpUploadFile(dst string, src io.Reader, w io.Writer, r *bufio.Reader) error {
+	// Determine the length of the upload content by copying it
+	// into an in-memory buffer. Note that this means what we upload
+	// must fit into memory.
+	log.Println("Copying input data into in-memory buffer so we can get the length")
+	inputBuf := new(bytes.Buffer)
+	if _, err := io.Copy(inputBuf, src); err != nil {
+		return err
+	}
+
+	// Start the protocol
+	log.Println("Beginning file upload...")
+	fmt.Fprintln(w, "C0644", inputBuf.Len(), dst)
+	err := checkSCPStatus(r)
+	if err != nil {
+		return err
+	}
+
+	if _, err := io.Copy(w, inputBuf); err != nil {
+		return err
+	}
+
+	fmt.Fprint(w, "\x00")
+	err = checkSCPStatus(r)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func scpUploadDir(root string, fs []os.FileInfo, w io.Writer, r *bufio.Reader) error {
+	for _, fi := range fs {
+		if !fi.IsDir() {
+			// It is a regular file, just upload it
+			f, err := os.Open(filepath.Join(root, fi.Name()))
+			if err != nil {
+				return err
+			}
+
+			err = func() error {
+				defer f.Close()
+				return scpUploadFile(fi.Name(), f, w, r)
+			}()
+
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+func scpWalkFn(cur string, dst string, src string, w io.Writer, r *bufio.Reader) filepath.WalkFunc {
+	return func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		if path == cur {
+			// Don't upload ourselves
+			return nil
+		}
+
+		// Get the relative path so that we can check excludes and also
+		// so that we can build the full destination path
+		relPath, err := filepath.Rel(src, path)
+		if err != nil {
+			return err
+		}
+
+		// TODO(mitchellh): Check excludes
+		targetPath := filepath.Base(relPath)
+		if info.IsDir() {
+			log.Printf("SCP: starting directory upload: %s", targetPath)
+			fmt.Fprintln(w, "D0755 0", targetPath)
+			err := checkSCPStatus(r)
+			if err != nil {
+				return err
+			}
+
+			err = filepath.Walk(path, scpWalkFn(path, dst, src, w, r))
+			if err != nil {
+				return err
+			}
+
+			fmt.Fprintln(w, "E")
+			return checkSCPStatus(r)
+		}
+
+		// Open the file for uploading
+		f, err := os.Open(path)
+		if err != nil {
+			return err
+		}
+		defer f.Close()
+
+		// Upload the file like any normal SCP operation
+		targetPath = filepath.Base(relPath)
+		return scpUploadFile(targetPath, f, w, r)
+	}
+}