use plan instead of dry-run

DOCS.md

@@ -1,6 +1,6 @@
 Use the Terraform plugin to apply the infrastructure configuration contained within the repository. The following parameters are used to configure this plugin:
 
-* `dry_run` - if true, calculates a plan but does __NOT__ apply it.
+* `plan` - if true, calculates a plan but does __NOT__ apply it.
 * `remote` - contains the configuration for the Terraform remote state tracking.
   * `backend` - the Terraform remote state backend to use.
   * `config` - a map of configuration parameters for the remote state backend. Each value is passed as a `-backend-config=<key>=<value>` option.
@@ -11,7 +11,7 @@ The following is a sample Terraform configuration in your .drone.yml file:
 ```yaml
 deploy:
   terraform:
-    dry_run: false
+    plan: false
     remote:
       backend: S3
       config:

main.go

@@ -11,7 +11,7 @@ import (
 
 type terraform struct {
 	Remote remote            `json:"remote"`
-	DryRun bool              `json:"dry_run"`
+	Plan   bool              `json:"plan"`
 	Vars   map[string]string `json:"vars"`
 }
 
@@ -35,7 +35,7 @@ func main() {
 		commands = append(commands, remoteConfigCommand(remote))
 	}
 	commands = append(commands, planCommand(vargs.Vars))
-	if !vargs.DryRun {
+	if !vargs.Plan {
 		commands = append(commands, applyCommand())
 	}