1 files changed, 137 insertions, 0 deletions
diff --git a/vendor/github.com/toqueteos/webbrowser/webbrowser.go b/vendor/github.com/toqueteos/webbrowser/webbrowser.go
new file mode 100644
index 0000000000..f4f19b6b3d
--- /dev/null
+++ b/vendor/github.com/toqueteos/webbrowser/webbrowser.go
@@ -0,0 +1,137 @@
+// Package webbrowser provides a simple API for opening web pages on your
+// default browser.
+package webbrowser
+
+import (
+	"errors"
+	"fmt"
+	"net/url"
+	"os"
+	"os/exec"
+	"runtime"
+	"strings"
+)
+
+var (
+	ErrCantOpenBrowser = errors.New("webbrowser: can't open browser")
+	ErrNoCandidates    = errors.New("webbrowser: no browser candidate found for your OS")
+)
+
+// Candidates contains a list of registered `Browser`s that will be tried with Open.
+var Candidates []Browser
+
+type Browser interface {
+	// Command returns a ready to be used Cmd that will open an URL.
+	Command(string) (*exec.Cmd, error)
+	// Open tries to open a URL in your default browser. NOTE: This may cause
+	// your program to hang until the browser process is closed in some OSes,
+	// see https://github.com/toqueteos/webbrowser/issues/4.
+	Open(string) error
+}
+
+// Open tries to open a URL in your default browser ensuring you have a display
+// set up and not running this from SSH. NOTE: This may cause your program to
+// hang until the browser process is closed in some OSes, see
+// https://github.com/toqueteos/webbrowser/issues/4.
+func Open(s string) (err error) {
+	if len(Candidates) == 0 {
+		return ErrNoCandidates
+	}
+
+	// Try to determine if there's a display available (only linux) and we
+	// aren't on a terminal (all but windows).
+	switch runtime.GOOS {
+	case "linux":
+		// No display, no need to open a browser. Lynx users **MAY** have
+		// something to say about this.
+		if os.Getenv("DISPLAY") == "" {
+			return fmt.Errorf("webbrowser: tried to open %q, no screen found", s)
+		}
+		fallthrough
+	case "darwin":
+		// Check SSH env vars.
+		if os.Getenv("SSH_CLIENT") != "" || os.Getenv("SSH_TTY") != "" {
+			return fmt.Errorf("webbrowser: tried to open %q, but you are running a shell session", s)
+		}
+	}
+
+	// Try all candidates
+	for _, candidate := range Candidates {
+		err := candidate.Open(s)
+		if err == nil {
+			return nil
+		}
+	}
+
+	return ErrCantOpenBrowser
+}
+
+func init() {
+	// Register the default Browser for current OS, if it exists.
+	if os, ok := osCommand[runtime.GOOS]; ok {
+		Candidates = append(Candidates, browserCommand{os.cmd, os.args})
+	}
+}
+
+var (
+	osCommand = map[string]*browserCommand{
+		"android": &browserCommand{"xdg-open", nil},
+		"darwin":  &browserCommand{"open", nil},
+		"freebsd": &browserCommand{"xdg-open", nil},
+		"linux":   &browserCommand{"xdg-open", nil},
+		"netbsd":  &browserCommand{"xdg-open", nil},
+		"openbsd": &browserCommand{"xdg-open", nil}, // It may be open instead
+		"windows": &browserCommand{"cmd", []string{"/c", "start"}},
+	}
+	winSchemes = [3]string{"https", "http", "file"}
+)
+
+type browserCommand struct {
+	cmd  string
+	args []string
+}
+
+func (b browserCommand) Command(s string) (*exec.Cmd, error) {
+	u, err := url.Parse(s)
+	if err != nil {
+		return nil, err
+	}
+
+	validUrl := ensureValidURL(u)
+
+	b.args = append(b.args, validUrl)
+
+	return exec.Command(b.cmd, b.args...), nil
+}
+
+func (b browserCommand) Open(s string) error {
+	cmd, err := b.Command(s)
+	if err != nil {
+		return err
+	}
+
+	return cmd.Run()
+}
+
+func ensureScheme(u *url.URL) {
+	for _, s := range winSchemes {
+		if u.Scheme == s {
+			return
+		}
+	}
+	u.Scheme = "http"
+}
+
+func ensureValidURL(u *url.URL) string {
+	// Enforce a scheme (windows requires scheme to be set to work properly).
+	ensureScheme(u)
+	s := u.String()
+
+	// Escape characters not allowed by cmd/bash
+	switch runtime.GOOS {
+	case "windows":
+		s = strings.Replace(s, "&", `^&`, -1)
+	}
+
+	return s
+}