update cli library

vendor/github.com/mitchellh/cli/README.md

@@ -3,8 +3,11 @@
 cli is a library for implementing powerful command-line interfaces in Go.
 cli is the library that powers the CLI for
 [Packer](https://github.com/mitchellh/packer),
-[Serf](https://github.com/hashicorp/serf), and
-[Consul](https://github.com/hashicorp/consul).
+[Serf](https://github.com/hashicorp/serf),
+[Consul](https://github.com/hashicorp/consul),
+[Vault](https://github.com/hashicorp/vault),
+[Terraform](https://github.com/hashicorp/terraform), and
+[Nomad](https://github.com/hashicorp/nomad).
 
 ## Features
 

vendor/github.com/mitchellh/cli/cli.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"regexp"
 	"sort"
 	"strings"
 	"sync"
@@ -24,7 +25,7 @@ import (
 //
 //   * We use longest prefix matching to find a matching subcommand. This
 //     means if you register "foo bar" and the user executes "cli foo qux",
-//     the "foo" commmand will be executed with the arg "qux". It is up to
+//     the "foo" command will be executed with the arg "qux". It is up to
 //     you to handle these args. One option is to just return the special
 //     help return code `RunResultHelp` to display help and exit.
 //
@@ -119,7 +120,13 @@ func (c *CLI) Run() (int, error) {
 	// Just show the version and exit if instructed.
 	if c.IsVersion() && c.Version != "" {
 		c.HelpWriter.Write([]byte(c.Version + "\n"))
-		return 1, nil
+		return 0, nil
+	}
+
+	// Just print the help when only '-h' or '--help' is passed.
+	if c.IsHelp() && c.Subcommand() == "" {
+		c.HelpWriter.Write([]byte(c.HelpFunc(c.Commands) + "\n"))
+		return 0, nil
 	}
 
 	// Attempt to get the factory function for creating the command
@@ -132,13 +139,13 @@ func (c *CLI) Run() (int, error) {
 
 	command, err := raw.(CommandFactory)()
 	if err != nil {
-		return 0, err
+		return 1, err
 	}
 
 	// If we've been instructed to just print the help, then print it
 	if c.IsHelp() {
 		c.commandHelp(command)
-		return 1, nil
+		return 0, nil
 	}
 
 	// If there is an invalid flag, then error
@@ -249,7 +256,7 @@ func (c *CLI) init() {
 		c.commandTree.Walk(walkFn)
 
 		// Insert any that we're missing
-		for k, _ := range toInsert {
+		for k := range toInsert {
 			var f CommandFactory = func() (Command, error) {
 				return &MockCommand{
 					HelpText:  "This command is accessed by using one of the subcommands below.",
@@ -294,7 +301,7 @@ func (c *CLI) commandHelp(command Command) {
 		// Get the matching keys
 		subcommands := c.helpCommands(c.Subcommand())
 		keys := make([]string, 0, len(subcommands))
-		for k, _ := range subcommands {
+		for k := range subcommands {
 			keys = append(keys, k)
 		}
 
@@ -311,8 +318,13 @@ func (c *CLI) commandHelp(command Command) {
 
 		// Go through and create their structures
 		subcommandsTpl = make([]map[string]interface{}, 0, len(subcommands))
-		for k, raw := range subcommands {
+		for _, k := range keys {
 			// Get the command
+			raw, ok := subcommands[k]
+			if !ok {
+				c.HelpWriter.Write([]byte(fmt.Sprintf(
+					"Error getting subcommand %q", k)))
+			}
 			sub, err := raw()
 			if err != nil {
 				c.HelpWriter.Write([]byte(fmt.Sprintf(
@@ -382,17 +394,23 @@ func (c *CLI) helpCommands(prefix string) map[string]CommandFactory {
 
 func (c *CLI) processArgs() {
 	for i, arg := range c.Args {
-		if c.subcommand == "" {
-			// Check for version and help flags if not in a subcommand
-			if arg == "-v" || arg == "-version" || arg == "--version" {
-				c.isVersion = true
-				continue
+		if arg == "--" {
+			break
 		}
+
+		// Check for help flags.
 		if arg == "-h" || arg == "-help" || arg == "--help" {
 			c.isHelp = true
 			continue
 		}
 
+		if c.subcommand == "" {
+			// Check for version flags if not in a subcommand.
+			if arg == "-v" || arg == "-version" || arg == "--version" {
+				c.isVersion = true
+				continue
+			}
+
 			if arg != "" && arg[0] == '-' {
 				// Record the arg...
 				c.topFlags = append(c.topFlags, arg)
@@ -400,18 +418,26 @@ func (c *CLI) processArgs() {
 		}
 
 		// If we didn't find a subcommand yet and this is the first non-flag
-		// argument, then this is our subcommand. j
+		// argument, then this is our subcommand.
 		if c.subcommand == "" && arg != "" && arg[0] != '-' {
 			c.subcommand = arg
 			if c.commandNested {
 				// Nested CLI, the subcommand is actually the entire
 				// arg list up to a flag that is still a valid subcommand.
-				k, _, ok := c.commandTree.LongestPrefix(strings.Join(c.Args[i:], " "))
+				searchKey := strings.Join(c.Args[i:], " ")
+				k, _, ok := c.commandTree.LongestPrefix(searchKey)
 				if ok {
+					// k could be a prefix that doesn't contain the full
+					// command such as "foo" instead of "foobar", so we
+					// need to verify that we have an entire key. To do that,
+					// we look for an ending in a space or an end of string.
+					reVerify := regexp.MustCompile(regexp.QuoteMeta(k) + `( |$)`)
+					if reVerify.MatchString(searchKey) {
 						c.subcommand = k
 						i += strings.Count(k, " ")
 					}
 				}
+			}
 
 			// The remaining args the subcommand arguments
 			c.subcommandArgs = c.Args[i+1:]
@@ -434,7 +460,7 @@ const defaultHelpTemplate = `
 {{.Help}}{{if gt (len .Subcommands) 0}}
 
 Subcommands:
-{{ range $value := .Subcommands }}
+{{- range $value := .Subcommands }}
     {{ $value.NameAligned }}    {{ $value.Synopsis }}{{ end }}
-{{ end }}
+{{- end }}
 `

vendor/github.com/mitchellh/cli/help.go

@@ -18,7 +18,7 @@ func BasicHelpFunc(app string) HelpFunc {
 	return func(commands map[string]CommandFactory) string {
 		var buf bytes.Buffer
 		buf.WriteString(fmt.Sprintf(
-			"usage: %s [--version] [--help] <command> [<args>]\n\n",
+			"Usage: %s [--version] [--help] <command> [<args>]\n\n",
 			app))
 		buf.WriteString("Available commands are:\n")
 
@@ -26,7 +26,7 @@ func BasicHelpFunc(app string) HelpFunc {
 		// key length so they can be aligned properly.
 		keys := make([]string, 0, len(commands))
 		maxKeyLen := 0
-		for key, _ := range commands {
+		for key := range commands {
 			if len(key) > maxKeyLen {
 				maxKeyLen = len(key)
 			}

vendor/vendor.json

@@ -596,9 +596,10 @@
 			"revision": "56b76bdf51f7708750eac80fa38b952bb9f32639"
 		},
 		{
-			"checksumSHA1": "WbXdGQiD4hQNID4Xo/RJumaimk0=",
+			"checksumSHA1": "UP+pXl+ic9y6qrpZA5MqDIAuGfw=",
 			"path": "github.com/mitchellh/cli",
-			"revision": "5c87c51cedf76a1737bf5ca3979e8644871598a6"
+			"revision": "ee8578a9c12a5bb9d55303b9665cc448772c81b8",
+			"revisionTime": "2017-03-28T05:23:52Z"
 		},
 		{
 			"checksumSHA1": "mVqDwKcibat0IKAdzAhfGIHPwI8=",