command/pull: Adding the pull command
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7febe57ae6
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@ -174,3 +174,24 @@ func testTempDir(t *testing.T) string {
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return d
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}
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// testCwdDir is used to change the current working directory
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// into a test directory that should be remoted after
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func testCwd(t *testing.T) (string, string) {
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tmp, err := ioutil.TempDir("", "remote")
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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cwd, err := os.Getwd()
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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os.Chdir(tmp)
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return tmp, cwd
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}
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// fixDir is used to as a defer to testDir
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func fixDir(tmp, cwd string) {
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os.Chdir(cwd)
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os.RemoveAll(tmp)
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}
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@ -0,0 +1,92 @@
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package command
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import (
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"flag"
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"fmt"
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"strings"
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"github.com/hashicorp/terraform/remote"
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"github.com/hashicorp/terraform/terraform"
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)
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type PullCommand struct {
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Meta
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}
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func (c *PullCommand) Run(args []string) int {
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var remoteConf terraform.RemoteState
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args = c.Meta.process(args, false)
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cmdFlags := flag.NewFlagSet("pull", flag.ContinueOnError)
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cmdFlags.StringVar(&remoteConf.Name, "remote", "", "")
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cmdFlags.StringVar(&remoteConf.Server, "remote-server", "", "")
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cmdFlags.StringVar(&remoteConf.AuthToken, "remote-auth", "", "")
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cmdFlags.Usage = func() { c.Ui.Error(c.Help()) }
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if err := cmdFlags.Parse(args); err != nil {
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return 1
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}
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// Validate the remote configuration if given
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var conf *terraform.RemoteState
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if !remoteConf.Empty() {
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if err := remote.ValidateConfig(&remoteConf); err != nil {
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c.Ui.Error(fmt.Sprintf("%s", err))
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return 1
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}
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conf = &remoteConf
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} else {
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// Recover the local state if any
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local, _, err := remote.ReadLocalState()
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if err != nil {
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c.Ui.Error(fmt.Sprintf("%s", err))
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return 1
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}
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if local == nil || local.Remote == nil {
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c.Ui.Error("No remote state server configured")
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return 1
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}
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conf = local.Remote
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}
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// Attempt the state refresh
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change, err := remote.RefreshState(conf)
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if err != nil {
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c.Ui.Error(fmt.Sprintf(
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"Failed to refresh from remote state: %v", err))
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return 1
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}
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// Use an error exit code if the update was not a success
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if !change.SuccessfulPull() {
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c.Ui.Error(fmt.Sprintf("%s", change))
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return 1
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} else {
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c.Ui.Output(fmt.Sprintf("%s", change))
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}
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return 0
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}
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func (c *PullCommand) Help() string {
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helpText := `
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Usage: terraform pull [options]
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Refreshes the cached state file from the remote server. It can also
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be used to perform the initial clone of the state file and setup the
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remote server configuration to use remote state storage.
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Options:
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-remote=name Name of the state file in the state storage server.
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Optional, default does not use remote storage.
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-remote-auth=token Authentication token for state storage server.
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Optional, defaults to blank.
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-remote-server=url URL of the remote storage server.
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`
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return strings.TrimSpace(helpText)
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}
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func (c *PullCommand) Synopsis() string {
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return "Refreshes the local state copy from the remote server"
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}
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@ -0,0 +1,118 @@
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package command
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import (
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"bytes"
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"crypto/md5"
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"encoding/base64"
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"encoding/json"
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"net/http"
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"net/http/httptest"
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"testing"
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"github.com/hashicorp/terraform/remote"
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"github.com/hashicorp/terraform/terraform"
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"github.com/mitchellh/cli"
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)
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func TestPull_noRemote(t *testing.T) {
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tmp, cwd := testCwd(t)
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defer fixDir(tmp, cwd)
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ui := new(cli.MockUi)
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c := &PullCommand{
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Meta: Meta{
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ContextOpts: testCtxConfig(testProvider()),
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Ui: ui,
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},
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}
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args := []string{}
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if code := c.Run(args); code != 1 {
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t.Fatalf("bad: \n%s", ui.ErrorWriter.String())
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}
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}
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func TestPull_cliRemote(t *testing.T) {
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tmp, cwd := testCwd(t)
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defer fixDir(tmp, cwd)
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s := terraform.NewState()
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remote, srv := testRemoteState(t, s)
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defer srv.Close()
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ui := new(cli.MockUi)
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c := &PullCommand{
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Meta: Meta{
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ContextOpts: testCtxConfig(testProvider()),
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Ui: ui,
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},
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}
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args := []string{"-remote", remote.Name, "-remote-server", remote.Server}
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if code := c.Run(args); code != 0 {
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t.Fatalf("bad: \n%s", ui.ErrorWriter.String())
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}
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}
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func TestPull_localRemote(t *testing.T) {
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tmp, cwd := testCwd(t)
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defer fixDir(tmp, cwd)
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s := terraform.NewState()
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s.Serial = 10
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conf, srv := testRemoteState(t, s)
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s = terraform.NewState()
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s.Serial = 5
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s.Remote = conf
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defer srv.Close()
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// Store the local state
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buf := bytes.NewBuffer(nil)
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terraform.WriteState(s, buf)
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remote.EnsureDirectory()
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remote.Persist(buf)
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ui := new(cli.MockUi)
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c := &PullCommand{
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Meta: Meta{
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ContextOpts: testCtxConfig(testProvider()),
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Ui: ui,
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},
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}
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args := []string{}
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if code := c.Run(args); code != 0 {
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t.Fatalf("bad: \n%s", ui.ErrorWriter.String())
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}
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}
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// testRemoteState is used to make a test HTTP server to
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// return a given state file
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func testRemoteState(t *testing.T, s *terraform.State) (*terraform.RemoteState, *httptest.Server) {
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var b64md5 string
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buf := bytes.NewBuffer(nil)
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if s != nil {
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enc := json.NewEncoder(buf)
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if err := enc.Encode(s); err != nil {
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t.Fatalf("err: %v", err)
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}
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md5 := md5.Sum(buf.Bytes())
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b64md5 = base64.StdEncoding.EncodeToString(md5[:16])
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}
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cb := func(resp http.ResponseWriter, req *http.Request) {
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if s == nil {
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resp.WriteHeader(404)
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return
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}
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resp.Header().Set("Content-MD5", b64md5)
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resp.Write(buf.Bytes())
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}
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srv := httptest.NewServer(http.HandlerFunc(cb))
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remote := &terraform.RemoteState{
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Name: "foo",
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Server: srv.URL,
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}
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return remote, srv
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}
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@ -78,6 +78,12 @@ func init() {
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}, nil
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},
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"pull": func() (cli.Command, error) {
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return &command.PullCommand{
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Meta: meta,
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}, nil
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},
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"refresh": func() (cli.Command, error) {
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return &command.RefreshCommand{
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Meta: meta,
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