package localexec import ( "fmt" "os/exec" "runtime" "github.com/armon/circbuf" "github.com/hashicorp/terraform/helper/config" "github.com/hashicorp/terraform/terraform" ) const ( // maxBufSize limits how much output we collect from a local // invocation. This is to prevent TF memory usage from growing // to an enormous amount due to a faulty process. maxBufSize = 8 * 1024 ) type ResourceProvisioner struct{} func (p *ResourceProvisioner) Apply( s *terraform.InstanceState, c *terraform.ResourceConfig) error { // Get the command commandRaw, ok := c.Config["command"] if !ok { return fmt.Errorf("local-exec provisioner missing 'command'") } command, ok := commandRaw.(string) if !ok { return fmt.Errorf("local-exec provisioner command must be a string") } // Execute the command using a shell var shell, flag string if runtime.GOOS == "windows" { shell = "cmd" flag = "/C" } else { shell = "/bin/sh" flag = "-c" } // Setup the command cmd := exec.Command(shell, flag, command) output, _ := circbuf.NewBuffer(maxBufSize) cmd.Stderr = output cmd.Stdout = output // Run the command to completion if err := cmd.Run(); err != nil { return fmt.Errorf("Error running command '%s': %v. Output: %s", command, err, output.Bytes()) } return nil } func (p *ResourceProvisioner) Validate(c *terraform.ResourceConfig) ([]string, []error) { validator := config.Validator{ Required: []string{"command"}, } return validator.Validate(c) }