Merge pull request #2866 from hashicorp/f-autocomplete-agent

Agent command autocompletes to hcl/json files

command/agent/command.go

@@ -27,6 +27,7 @@ import (
 	"github.com/hashicorp/nomad/nomad/structs/config"
 	"github.com/hashicorp/scada-client/scada"
 	"github.com/mitchellh/cli"
+	"github.com/posener/complete"
 )
 
 // gracefulTimeout controls how long we wait before forcefully terminating
@@ -408,6 +409,20 @@ func (c *Command) checkpointResults(results *checkpoint.CheckResponse, err error
 	}
 }
 
+func (c *Command) AutocompleteFlags() complete.Flags {
+	configFilePredictor := complete.PredictOr(
+		complete.PredictFiles("*.json"),
+		complete.PredictFiles("*.hcl"))
+
+	return map[string]complete.Predictor{
+		"-config": configFilePredictor,
+	}
+}
+
+func (c *Command) AutocompleteArgs() complete.Predictor {
+	return nil
+}
+
 func (c *Command) Run(args []string) int {
 	c.Ui = &cli.PrefixedUi{
 		OutputPrefix: "==> ",