2014-07-10 22:30:44 +02:00
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package remoteexec
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import (
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2014-07-12 01:02:51 +02:00
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"fmt"
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"strings"
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2014-07-10 22:30:44 +02:00
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"github.com/hashicorp/terraform/terraform"
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"github.com/mitchellh/mapstructure"
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)
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const (
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// DefaultUser is used if there is no default user given
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DefaultUser = "root"
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// DefaultPort is used if there is no port given
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DefaultPort = 22
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// DefaultScriptPath is used as the path to copy the file to
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// for remote execution if not provided otherwise.
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DefaultScriptPath = "/tmp/script.sh"
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// DefaultTimeout is used if there is no timeout given
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DefaultTimeout = "5m"
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// DefaultShebang is added at the top of the script file
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DefaultShebang = "#!/bin/sh"
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)
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type ResourceProvisioner struct{}
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// SSHConfig is decoded from the ConnInfo of the resource. These
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// are the only keys we look at. If a KeyFile is given, that is used
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// instead of a password.
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type SSHConfig struct {
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User string
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Password string
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KeyFile string `mapstructure:"key_file"`
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Host string
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Port int
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Timeout string
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ScriptPath string `mapstructure:"script_path"`
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}
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func (p *ResourceProvisioner) Apply(s *terraform.ResourceState,
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c *terraform.ResourceConfig) (*terraform.ResourceState, error) {
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// Ensure the connection type is SSH
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if err := p.verifySSH(s); err != nil {
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return s, err
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}
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// Get the SSH configuration
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_, err := p.sshConfig(s)
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if err != nil {
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return s, err
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}
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panic("not implemented")
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return s, nil
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}
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func (p *ResourceProvisioner) Validate(c *terraform.ResourceConfig) (ws []string, es []error) {
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num := 0
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for name := range c.Raw {
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switch name {
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case "scripts":
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fallthrough
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case "script":
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fallthrough
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case "inline":
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num++
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default:
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es = append(es, fmt.Errorf("Unknown configuration '%s'", name))
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}
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}
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if num != 1 {
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es = append(es, fmt.Errorf("Must provide one of 'scripts', 'script' or 'inline' to remote-exec"))
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}
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return
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}
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// verifySSH is used to verify the ConnInfo is usable by remote-exec
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func (p *ResourceProvisioner) verifySSH(s *terraform.ResourceState) error {
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connType := s.ConnInfo.Raw["type"]
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switch connType {
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case "":
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case "ssh":
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default:
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return fmt.Errorf("Connection type '%s' not supported", connType)
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}
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return nil
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}
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// sshConfig is used to convert the ConnInfo of the ResourceState into
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// a SSHConfig struct
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func (p *ResourceProvisioner) sshConfig(s *terraform.ResourceState) (*SSHConfig, error) {
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sshConf := &SSHConfig{}
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decConf := &mapstructure.DecoderConfig{
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WeaklyTypedInput: true,
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Result: sshConf,
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}
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dec, err := mapstructure.NewDecoder(decConf)
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if err != nil {
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return nil, err
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}
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if err := dec.Decode(s.ConnInfo.Raw); err != nil {
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return nil, err
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}
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if sshConf.User == "" {
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sshConf.User = DefaultUser
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}
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if sshConf.Port == 0 {
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sshConf.Port = DefaultPort
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}
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if sshConf.ScriptPath == "" {
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sshConf.ScriptPath = DefaultScriptPath
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}
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if sshConf.Timeout == "" {
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sshConf.Timeout = DefaultTimeout
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}
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return sshConf, nil
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}
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// generateScript takes the configuration and creates a script to be executed
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// from the inline configs
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func (p *ResourceProvisioner) generateScript(c *terraform.ResourceConfig) (string, error) {
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lines := []string{DefaultShebang}
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command, ok := c.Config["inline"]
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if ok {
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switch cmd := command.(type) {
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case string:
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lines = append(lines, cmd)
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case []string:
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lines = append(lines, cmd...)
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case []interface{}:
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for _, l := range cmd {
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lStr, ok := l.(string)
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if ok {
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lines = append(lines, lStr)
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} else {
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return "", fmt.Errorf("Unsupported 'inline' type! Must be string, or list of strings.")
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}
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}
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default:
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return "", fmt.Errorf("Unsupported 'inline' type! Must be string, or list of strings.")
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}
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}
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lines = append(lines, "")
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return strings.Join(lines, "\n"), nil
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}
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