command: add primitive run command

command/run.go

@@ -0,0 +1,96 @@
+package command
+
+import (
+	"bytes"
+	"encoding/gob"
+	"fmt"
+	"strings"
+
+	"github.com/hashicorp/nomad/api"
+	"github.com/hashicorp/nomad/jobspec"
+	"github.com/hashicorp/nomad/nomad/structs"
+)
+
+type RunCommand struct {
+	Meta
+}
+
+func (c *RunCommand) Help() string {
+	helpText := `
+Usage: nomad run [options] <file>
+
+  Starts running a new job using the definition located at <file>.
+  This is the main command used to invoke new work in Nomad.
+
+General Options:
+
+  ` + generalOptionsUsage()
+	return strings.TrimSpace(helpText)
+}
+
+func (c *RunCommand) Synopsis() string {
+	return "Run a new job"
+}
+
+func (c *RunCommand) Run(args []string) int {
+	flags := c.Meta.FlagSet("run", FlagSetClient)
+	flags.Usage = func() { c.Ui.Output(c.Help()) }
+	if err := flags.Parse(args); err != nil {
+		return 1
+	}
+
+	// Check that we got exactly one node
+	args = flags.Args()
+	if len(args) != 1 {
+		c.Ui.Error(c.Help())
+		return 1
+	}
+	file := args[0]
+
+	// Parse the job file
+	job, err := jobspec.ParseFile(file)
+	if err != nil {
+		c.Ui.Error(fmt.Sprintf("Error parsing job file %s: %s", file, err))
+		return 1
+	}
+
+	// Convert it to something we can use
+	apiJob, err := convertJob(job)
+	if err != nil {
+		c.Ui.Error(fmt.Sprintf("Error converting job: %s", err))
+		return 1
+	}
+
+	// Get the HTTP client
+	client, err := c.Meta.Client()
+	if err != nil {
+		c.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
+		return 1
+	}
+
+	// Submit the job
+	evalID, _, err := client.Jobs().Register(apiJob, nil)
+	if err != nil {
+		c.Ui.Error(fmt.Sprintf("Error submitting job: %s", err))
+		return 1
+	}
+
+	c.Ui.Info("Job registered successfully!\n")
+	c.Ui.Info("JobID  = " + job.ID)
+	c.Ui.Info("EvalID = " + evalID)
+	return 0
+}
+
+// convertJob is used to take a *structs.Job and convert it to an *api.Job.
+// This function is just a hammer and probably needs to be revisited.
+func convertJob(in *structs.Job) (*api.Job, error) {
+	var apiJob *api.Job
+	buf := new(bytes.Buffer)
+	if err := gob.NewEncoder(buf).Encode(in); err != nil {
+		return nil, err
+	}
+	if err := gob.NewDecoder(buf).Decode(&apiJob); err != nil {
+		return nil, err
+	}
+	return apiJob, nil
+}

command/run_test.go

@@ -0,0 +1,70 @@
+package command
+
+import (
+	"io/ioutil"
+	"os"
+	"strings"
+	"testing"
+
+	"github.com/mitchellh/cli"
+)
+
+func TestRunCommand_Implements(t *testing.T) {
+	var _ cli.Command = &RunCommand{}
+}
+
+func TestRunCommand_Fails(t *testing.T) {
+	ui := new(cli.MockUi)
+	cmd := &RunCommand{Meta: Meta{Ui: ui}}
+
+	// Fails on misuse
+	if code := cmd.Run([]string{"some", "bad", "args"}); code != 1 {
+		t.Fatalf("expected exit code 1, got: %d", code)
+	}
+	if out := ui.ErrorWriter.String(); !strings.Contains(out, cmd.Help()) {
+		t.Fatalf("expected help output, got: %s", out)
+	}
+	ui.ErrorWriter.Reset()
+
+	// Fails when specified file does not exist
+	if code := cmd.Run([]string{"/unicorns/leprechauns"}); code != 1 {
+		t.Fatalf("expect exit 1, got: %d", code)
+	}
+	if out := ui.ErrorWriter.String(); !strings.Contains(out, "Error parsing") {
+		t.Fatalf("expect parsing error, got: %s", out)
+	}
+	ui.ErrorWriter.Reset()
+
+	// Fails on invalid job
+	fh1, err := ioutil.TempFile("", "nomad")
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	defer os.Remove(fh1.Name())
+	if _, err := fh1.WriteString("nope"); err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	if code := cmd.Run([]string{fh1.Name()}); code != 1 {
+		t.Fatalf("expect exit 1, got: %d", code)
+	}
+	if out := ui.ErrorWriter.String(); !strings.Contains(out, "Error parsing") {
+		t.Fatalf("expect parsing error, got: %s", err)
+	}
+	ui.ErrorWriter.Reset()
+
+	// Fails on connection failure
+	fh2, err := ioutil.TempFile("", "nomad")
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	defer os.Remove(fh2.Name())
+	if _, err := fh2.WriteString(`job "hello" {}`); err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	if code := cmd.Run([]string{"-address=nope", fh2.Name()}); code != 1 {
+		t.Fatalf("expected exit code 1, got: %d", code)
+	}
+	if out := ui.ErrorWriter.String(); !strings.Contains(out, "Error submitting job") {
+		t.Fatalf("expected failed query error, got: %s", out)
+	}
+}