update go-getter

vendor/github.com/hashicorp/go-getter/README.md

@@ -21,8 +21,7 @@ URLs. For example: "github.com/hashicorp/go-getter" would turn into a
 Git URL. Or "./foo" would turn into a file URL. These are extensible.
 
 This library is used by [Terraform](https://terraform.io) for
-downloading modules, [Otto](https://ottoproject.io) for dependencies and
-Appfile imports, and [Nomad](https://nomadproject.io) for downloading
+downloading modules and [Nomad](https://nomadproject.io) for downloading
 binaries.
 
 ## Installation and Usage

vendor/github.com/hashicorp/go-getter/detect_file.go

@@ -32,7 +32,7 @@ func (d *FileDetector) Detect(src, pwd string) (string, bool, error) {
 				return "", true, err
 			}
 			if fi.Mode()&os.ModeSymlink != 0 {
-				pwd, err = os.Readlink(pwd)
+				pwd, err = filepath.EvalSymlinks(pwd)
 				if err != nil {
 					return "", true, err
 				}

vendor/github.com/hashicorp/go-getter/get.go

@@ -18,6 +18,8 @@ import (
 	"os/exec"
 	"regexp"
 	"syscall"
+
+	cleanhttp "github.com/hashicorp/go-cleanhttp"
 )
 
 // Getter defines the interface that schemes must implement to download
@@ -49,8 +51,13 @@ var Getters map[string]Getter
 // syntax is schema::url, example: git::https://foo.com
 var forcedRegexp = regexp.MustCompile(`^([A-Za-z0-9]+)::(.+)$`)
 
+// httpClient is the default client to be used by HttpGetters.
+var httpClient = cleanhttp.DefaultClient()
+
 func init() {
-	httpGetter := &HttpGetter{Netrc: true}
+	httpGetter := &HttpGetter{
+		Netrc: true,
+	}
 
 	Getters = map[string]Getter{
 		"file":  new(FileGetter),

vendor/github.com/hashicorp/go-getter/get_git.go

@@ -180,17 +180,34 @@ func (g *GitGetter) fetchSubmodules(dst, sshKeyFile string) error {
 // setupGitEnv sets up the environment for the given command. This is used to
 // pass configuration data to git and ssh and enables advanced cloning methods.
 func setupGitEnv(cmd *exec.Cmd, sshKeyFile string) {
-	var sshOpts []string
+	const gitSSHCommand = "GIT_SSH_COMMAND="
+	var sshCmd []string
+
+	// If we have an existing GIT_SSH_COMMAND, we need to append our options.
+	// We will also remove our old entry to make sure the behavior is the same
+	// with versions of Go < 1.9.
+	env := os.Environ()
+	for i, v := range env {
+		if strings.HasPrefix(v, gitSSHCommand) {
+			sshCmd = []string{v}
+
+			env[i], env[len(env)-1] = env[len(env)-1], env[i]
+			env = env[:len(env)-1]
+			break
+		}
+	}
+
+	if len(sshCmd) == 0 {
+		sshCmd = []string{gitSSHCommand + "ssh"}
+	}
 
 	if sshKeyFile != "" {
 		// We have an SSH key temp file configured, tell ssh about this.
-		sshOpts = append(sshOpts, "-i", sshKeyFile)
+		sshCmd = append(sshCmd, "-i", sshKeyFile)
 	}
 
-	cmd.Env = append(os.Environ(),
-		// Set the ssh command to use for clones.
-		"GIT_SSH_COMMAND=ssh "+strings.Join(sshOpts, " "),
-	)
+	env = append(env, strings.Join(sshCmd, " "))
+	cmd.Env = env
 }
 
 // checkGitVersion is used to check the version of git installed on the system

vendor/github.com/hashicorp/go-getter/get_http.go

@@ -36,6 +36,10 @@ type HttpGetter struct {
 	// Netrc, if true, will lookup and use auth information found
 	// in the user's netrc file if available.
 	Netrc bool
+
+	// Client is the http.Client to use for Get requests.
+	// This defaults to a cleanhttp.DefaultClient if left unset.
+	Client *http.Client
 }
 
 func (g *HttpGetter) ClientMode(u *url.URL) (ClientMode, error) {
@@ -57,13 +61,17 @@ func (g *HttpGetter) Get(dst string, u *url.URL) error {
 		}
 	}
 
+	if g.Client == nil {
+		g.Client = httpClient
+	}
+
 	// Add terraform-get to the parameter.
 	q := u.Query()
 	q.Add("terraform-get", "1")
 	u.RawQuery = q.Encode()
 
 	// Get the URL
-	resp, err := http.Get(u.String())
+	resp, err := g.Client.Get(u.String())
 	if err != nil {
 		return err
 	}
@@ -105,7 +113,11 @@ func (g *HttpGetter) GetFile(dst string, u *url.URL) error {
 		}
 	}
 
-	resp, err := http.Get(u.String())
+	if g.Client == nil {
+		g.Client = httpClient
+	}
+
+	resp, err := g.Client.Get(u.String())
 	if err != nil {
 		return err
 	}

vendor/vendor.json

@@ -1366,16 +1366,20 @@
 			"revisionTime": "2017-02-11T01:34:15Z"
 		},
 		{
-			"checksumSHA1": "cw5fzHNCbc3zVjNRnP1pm5tt5rk=",
+			"checksumSHA1": "7SY5eTKPGF0BjyByXfKhZAAqnKc=",
 			"path": "github.com/hashicorp/go-getter",
-			"revision": "ee320eed76420de7fa4395de568552c63fe9115e",
-			"revisionTime": "2017-09-05T20:45:58Z"
+			"revision": "56c651a79a6eec93e6ef074fe9e57fefb26b8b85",
+			"revisionTime": "2017-09-14T15:44:44Z",
+			"version": "master",
+			"versionExact": "master"
 		},
 		{
 			"checksumSHA1": "9J+kDr29yDrwsdu2ULzewmqGjpA=",
 			"path": "github.com/hashicorp/go-getter/helper/url",
-			"revision": "6aae8e4e2dee8131187c6a54b52664796e5a02b0",
-			"revisionTime": "2017-07-13T01:23:01Z"
+			"revision": "56c651a79a6eec93e6ef074fe9e57fefb26b8b85",
+			"revisionTime": "2017-09-14T15:44:44Z",
+			"version": "master",
+			"versionExact": "master"
 		},
 		{
 			"checksumSHA1": "miVF4/7JP0lRwZvFJGKwZWk7aAQ=",