provisioner/file: Initial pass at file provisioner

builtin/provisioners/file/resource_provisioner.go

@@ -1,6 +1,13 @@
 package file
 
 import (
+	"fmt"
+	"log"
+	"os"
+	"time"
+
+	"github.com/hashicorp/terraform/helper/config"
+	helper "github.com/hashicorp/terraform/helper/ssh"
 	"github.com/hashicorp/terraform/terraform"
 )
 
@@ -8,10 +15,102 @@ type ResourceProvisioner struct{}
 
 func (p *ResourceProvisioner) Apply(s *terraform.ResourceState,
 	c *terraform.ResourceConfig) (*terraform.ResourceState, error) {
-	panic("not implemented")
-	return s, nil
+	// Ensure the connection type is SSH
+	if err := helper.VerifySSH(s); err != nil {
+		return s, err
+	}
+
+	// Get the SSH configuration
+	conf, err := helper.ParseSSHConfig(s)
+	if err != nil {
+		return s, err
+	}
+
+	// Get the source and destination
+	sRaw := c.Config["source"]
+	src, ok := sRaw.(string)
+	if !ok {
+		return s, fmt.Errorf("Unsupported 'source' type! Must be string.")
+	}
+
+	dRaw := c.Config["destination"]
+	dst, ok := dRaw.(string)
+	if !ok {
+		return s, fmt.Errorf("Unsupported 'destination' type! Must be string.")
+	}
+	return s, p.copyFiles(conf, src, dst)
 }
 
 func (p *ResourceProvisioner) Validate(c *terraform.ResourceConfig) (ws []string, es []error) {
-	return
+	v := &config.Validator{
+		Required: []string{
+			"source",
+			"destination",
+		},
+	}
+	return v.Validate(c)
+}
+
+// copyFiles is used to copy the files from a source to a destination
+func (p *ResourceProvisioner) copyFiles(conf *helper.SSHConfig, src, dst string) error {
+	// Get the SSH client config
+	config, err := helper.PrepareConfig(conf)
+	if err != nil {
+		return err
+	}
+
+	// Wait and retry until we establish the SSH connection
+	var comm *helper.SSHCommunicator
+	err = retryFunc(conf.TimeoutVal, func() error {
+		host := fmt.Sprintf("%s:%d", conf.Host, conf.Port)
+		comm, err = helper.New(host, config)
+		return err
+	})
+	if err != nil {
+		return err
+	}
+
+	info, err := os.Stat(src)
+	if err != nil {
+		return err
+	}
+
+	// If we're uploading a directory, short circuit and do that
+	if info.IsDir() {
+		if err := comm.UploadDir(dst, src, nil); err != nil {
+			return fmt.Errorf("Upload failed: %v", err)
+		}
+		return nil
+	}
+
+	// We're uploading a file...
+	f, err := os.Open(src)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	err = comm.Upload(dst, f)
+	if err != nil {
+		return fmt.Errorf("Upload failed: %v", err)
+	}
+	return err
+}
+
+// retryFunc is used to retry a function for a given duration
+func retryFunc(timeout time.Duration, f func() error) error {
+	finish := time.After(timeout)
+	for {
+		err := f()
+		if err == nil {
+			return nil
+		}
+		log.Printf("Retryable error: %v", err)
+
+		select {
+		case <-finish:
+			return err
+		case <-time.After(3 * time.Second):
+		}
+	}
 }