Add support for passing encrypted data bag secret to chef-solo

Adds additional option to chef-solo provisioner for an encrypted data bag
secret file.  Local file is copied up and referenced in solo.rb

provisioner/chef-solo/provisioner.go

@@ -18,20 +18,21 @@ import (
 type Config struct {
 	common.PackerConfig `mapstructure:",squash"`
 
-	ChefEnvironment     string   `mapstructure:"chef_environment"`
-	ConfigTemplate      string   `mapstructure:"config_template"`
-	CookbookPaths       []string `mapstructure:"cookbook_paths"`
-	RolesPath           string   `mapstructure:"roles_path"`
-	DataBagsPath        string   `mapstructure:"data_bags_path"`
-	EnvironmentsPath    string   `mapstructure:"environments_path"`
-	ExecuteCommand      string   `mapstructure:"execute_command"`
-	InstallCommand      string   `mapstructure:"install_command"`
-	RemoteCookbookPaths []string `mapstructure:"remote_cookbook_paths"`
-	Json                map[string]interface{}
-	PreventSudo         bool     `mapstructure:"prevent_sudo"`
-	RunList             []string `mapstructure:"run_list"`
-	SkipInstall         bool     `mapstructure:"skip_install"`
-	StagingDir          string   `mapstructure:"staging_directory"`
+	ChefEnvironment        string   `mapstructure:"chef_environment"`
+	ConfigTemplate         string   `mapstructure:"config_template"`
+	CookbookPaths          []string `mapstructure:"cookbook_paths"`
+	RolesPath              string   `mapstructure:"roles_path"`
+	DataBagsPath           string   `mapstructure:"data_bags_path"`
+	EncryptedDataBagSecret string   `mapstructure:"encrypted_data_bag_secret"`
+	EnvironmentsPath       string   `mapstructure:"environments_path"`
+	ExecuteCommand         string   `mapstructure:"execute_command"`
+	InstallCommand         string   `mapstructure:"install_command"`
+	RemoteCookbookPaths    []string `mapstructure:"remote_cookbook_paths"`
+	Json                   map[string]interface{}
+	PreventSudo            bool     `mapstructure:"prevent_sudo"`
+	RunList                []string `mapstructure:"run_list"`
+	SkipInstall            bool     `mapstructure:"skip_install"`
+	StagingDir             string   `mapstructure:"staging_directory"`
 
 	tpl *packer.ConfigTemplate
 }
@@ -41,18 +42,20 @@ type Provisioner struct {
 }
 
 type ConfigTemplate struct {
-	CookbookPaths    string
-	DataBagsPath     string
-	RolesPath        string
-	EnvironmentsPath string
-	ChefEnvironment  string
+	CookbookPaths          string
+	DataBagsPath           string
+	EncryptedDataBagSecret string
+	RolesPath              string
+	EnvironmentsPath       string
+	ChefEnvironment        string
 
 	// Templates don't support boolean statements until Go 1.2. In the
 	// mean time, we do this.
 	// TODO(mitchellh): Remove when Go 1.2 is released
-	HasDataBagsPath     bool
-	HasRolesPath        bool
-	HasEnvironmentsPath bool
+	HasDataBagsPath           bool
+	HasEncryptedDataBagSecret bool
+	HasRolesPath              bool
+	HasEnvironmentsPath       bool
 }
 
 type ExecuteTemplate struct {
@@ -97,12 +100,13 @@ func (p *Provisioner) Prepare(raws ...interface{}) error {
 	errs := common.CheckUnusedConfig(md)
 
 	templates := map[string]*string{
-		"config_template":   &p.config.ConfigTemplate,
-		"data_bags_path":    &p.config.DataBagsPath,
-		"roles_path":        &p.config.RolesPath,
-		"staging_dir":       &p.config.StagingDir,
-		"environments_path": &p.config.EnvironmentsPath,
-		"chef_environment":  &p.config.ChefEnvironment,
+		"config_template":           &p.config.ConfigTemplate,
+		"data_bags_path":            &p.config.DataBagsPath,
+		"encrypted_data_bag_secret": &p.config.EncryptedDataBagSecret,
+		"roles_path":                &p.config.RolesPath,
+		"staging_dir":               &p.config.StagingDir,
+		"environments_path":         &p.config.EnvironmentsPath,
+		"chef_environment":          &p.config.ChefEnvironment,
 	}
 
 	for n, ptr := range templates {
@@ -181,6 +185,15 @@ func (p *Provisioner) Prepare(raws ...interface{}) error {
 		}
 	}
 
+	if p.config.EncryptedDataBagSecret != "" {
+		pFileInfo, err := os.Stat(p.config.EncryptedDataBagSecret)
+
+		if err != nil || pFileInfo.IsDir() {
+			errs = packer.MultiErrorAppend(
+				errs, fmt.Errorf("Bad encrypted data bag secret '%s': %s", p.config.EncryptedDataBagSecret, err))
+		}
+	}
+
 	if p.config.EnvironmentsPath != "" {
 		pFileInfo, err := os.Stat(p.config.EnvironmentsPath)
 
@@ -244,6 +257,14 @@ func (p *Provisioner) Provision(ui packer.Ui, comm packer.Communicator) error {
 		}
 	}
 
+	encryptedDataBagSecret := ""
+	if p.config.EncryptedDataBagSecret != "" {
+		encryptedDataBagSecret = fmt.Sprintf("%s/encrypted_data_bag_secret", p.config.StagingDir)
+		if err := p.uploadFile(ui, comm, encryptedDataBagSecret, p.config.EncryptedDataBagSecret); err != nil {
+			return fmt.Errorf("Error uploading encrypted data bag secret: %s", err)
+		}
+	}
+
 	environmentsPath := ""
 	if p.config.EnvironmentsPath != "" {
 		environmentsPath = fmt.Sprintf("%s/environments", p.config.StagingDir)
@@ -252,7 +273,7 @@ func (p *Provisioner) Provision(ui packer.Ui, comm packer.Communicator) error {
 		}
 	}
 
-	configPath, err := p.createConfig(ui, comm, cookbookPaths, rolesPath, dataBagsPath, environmentsPath, p.config.ChefEnvironment)
+	configPath, err := p.createConfig(ui, comm, cookbookPaths, rolesPath, dataBagsPath, encryptedDataBagSecret, environmentsPath, p.config.ChefEnvironment)
 	if err != nil {
 		return fmt.Errorf("Error creating Chef config file: %s", err)
 	}
@@ -289,7 +310,17 @@ func (p *Provisioner) uploadDirectory(ui packer.Ui, comm packer.Communicator, ds
 	return comm.UploadDir(dst, src, nil)
 }
 
-func (p *Provisioner) createConfig(ui packer.Ui, comm packer.Communicator, localCookbooks []string, rolesPath string, dataBagsPath string, environmentsPath string, chefEnvironment string) (string, error) {
+func (p *Provisioner) uploadFile(ui packer.Ui, comm packer.Communicator, dst string, src string) error {
+	f, err := os.Open(src)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	return comm.Upload(dst, f)
+}
+
+func (p *Provisioner) createConfig(ui packer.Ui, comm packer.Communicator, localCookbooks []string, rolesPath string, dataBagsPath string, encryptedDataBagSecret string, environmentsPath string, chefEnvironment string) (string, error) {
 	ui.Message("Creating configuration file 'solo.rb'")
 
 	cookbook_paths := make([]string, len(p.config.RemoteCookbookPaths)+len(localCookbooks))
@@ -320,14 +351,16 @@ func (p *Provisioner) createConfig(ui packer.Ui, comm packer.Communicator, local
 	}
 
 	configString, err := p.config.tpl.Process(tpl, &ConfigTemplate{
-		CookbookPaths:       strings.Join(cookbook_paths, ","),
-		RolesPath:           rolesPath,
-		DataBagsPath:        dataBagsPath,
-		EnvironmentsPath:    environmentsPath,
-		HasRolesPath:        rolesPath != "",
-		HasDataBagsPath:     dataBagsPath != "",
-		HasEnvironmentsPath: environmentsPath != "",
-		ChefEnvironment:     chefEnvironment,
+		CookbookPaths:             strings.Join(cookbook_paths, ","),
+		RolesPath:                 rolesPath,
+		DataBagsPath:              dataBagsPath,
+		EncryptedDataBagSecret:    encryptedDataBagSecret,
+		EnvironmentsPath:          environmentsPath,
+		HasRolesPath:              rolesPath != "",
+		HasDataBagsPath:           dataBagsPath != "",
+		HasEncryptedDataBagSecret: encryptedDataBagSecret != "",
+		HasEnvironmentsPath:       environmentsPath != "",
+		ChefEnvironment:           chefEnvironment,
 	})
 	if err != nil {
 		return "", err
@@ -485,6 +518,9 @@ role_path		"{{.RolesPath}}"
 {{if .HasDataBagsPath}}
 data_bag_path	"{{.DataBagsPath}}"
 {{end}}
+{{if .HasEncryptedDataBagSecret}}
+encrypted_data_bag_secret "{{.EncryptedDataBagSecret}}"
+{{end}}
 {{if .HasEnvironmentsPath}}
 environments_path "{{.EnvironmentsPath}}"
 chef_environment "{{.ChefEnvironment}}"