Update Azure SDK and support additional authentication schemes

Microsoft has updated the golang Azure SDK significantly.  Update the
azure storage driver to use the new SDK.  Add support for client
secret and MSI authentication schemes in addition to shared key
authentication.

Implement rootDirectory support for the azure storage driver to mirror
the S3 driver.

Signed-off-by: Kirat Singh <kirat.singh@beacon.io>

Co-authored-by: Cory Snider <corhere@gmail.com>

vendor/github.com/pkg/browser/LICENSE

@@ -0,0 +1,23 @@
+Copyright (c) 2014, Dave Cheney <dave@cheney.net>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/pkg/browser/README.md

@@ -0,0 +1,55 @@
+
+# browser
+    import "github.com/pkg/browser"
+
+Package browser provides helpers to open files, readers, and urls in a browser window.
+
+The choice of which browser is started is entirely client dependant.
+
+
+
+
+
+## Variables
+``` go
+var Stderr io.Writer = os.Stderr
+```
+Stderr is the io.Writer to which executed commands write standard error.
+
+``` go
+var Stdout io.Writer = os.Stdout
+```
+Stdout is the io.Writer to which executed commands write standard output.
+
+
+## func OpenFile
+``` go
+func OpenFile(path string) error
+```
+OpenFile opens new browser window for the file path.
+
+
+## func OpenReader
+``` go
+func OpenReader(r io.Reader) error
+```
+OpenReader consumes the contents of r and presents the
+results in a new browser window.
+
+
+## func OpenURL
+``` go
+func OpenURL(url string) error
+```
+OpenURL opens a new browser window pointing to url.
+
+
+
+
+
+
+
+
+
+- - -
+Generated by [godoc2md](http://godoc.org/github.com/davecheney/godoc2md)

vendor/github.com/pkg/browser/browser.go

@@ -0,0 +1,63 @@
+// Package browser provides helpers to open files, readers, and urls in a browser window.
+//
+// The choice of which browser is started is entirely client dependant.
+package browser
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path/filepath"
+)
+
+// Stdout is the io.Writer to which executed commands write standard output.
+var Stdout io.Writer = os.Stdout
+
+// Stderr is the io.Writer to which executed commands write standard error.
+var Stderr io.Writer = os.Stderr
+
+// OpenFile opens new browser window for the file path.
+func OpenFile(path string) error {
+	path, err := filepath.Abs(path)
+	if err != nil {
+		return err
+	}
+	return OpenURL("file://" + path)
+}
+
+// OpenReader consumes the contents of r and presents the
+// results in a new browser window.
+func OpenReader(r io.Reader) error {
+	f, err := ioutil.TempFile("", "browser")
+	if err != nil {
+		return fmt.Errorf("browser: could not create temporary file: %v", err)
+	}
+	if _, err := io.Copy(f, r); err != nil {
+		f.Close()
+		return fmt.Errorf("browser: caching temporary file failed: %v", err)
+	}
+	if err := f.Close(); err != nil {
+		return fmt.Errorf("browser: caching temporary file failed: %v", err)
+	}
+	oldname := f.Name()
+	newname := oldname + ".html"
+	if err := os.Rename(oldname, newname); err != nil {
+		return fmt.Errorf("browser: renaming temporary file failed: %v", err)
+	}
+	return OpenFile(newname)
+}
+
+// OpenURL opens a new browser window pointing to url.
+func OpenURL(url string) error {
+	return openBrowser(url)
+}
+
+func runCmd(prog string, args ...string) error {
+	cmd := exec.Command(prog, args...)
+	cmd.Stdout = Stdout
+	cmd.Stderr = Stderr
+	setFlags(cmd)
+	return cmd.Run()
+}

vendor/github.com/pkg/browser/browser_darwin.go

@@ -0,0 +1,9 @@
+package browser
+
+import "os/exec"
+
+func openBrowser(url string) error {
+	return runCmd("open", url)
+}
+
+func setFlags(cmd *exec.Cmd) {}

vendor/github.com/pkg/browser/browser_freebsd.go

@@ -0,0 +1,16 @@
+package browser
+
+import (
+	"errors"
+	"os/exec"
+)
+
+func openBrowser(url string) error {
+	err := runCmd("xdg-open", url)
+	if e, ok := err.(*exec.Error); ok && e.Err == exec.ErrNotFound {
+		return errors.New("xdg-open: command not found - install xdg-utils from ports(8)")
+	}
+	return err
+}
+
+func setFlags(cmd *exec.Cmd) {}

vendor/github.com/pkg/browser/browser_linux.go

@@ -0,0 +1,23 @@
+package browser
+
+import (
+	"os/exec"
+	"strings"
+)
+
+func openBrowser(url string) error {
+	providers := []string{"xdg-open", "x-www-browser", "www-browser"}
+
+	// There are multiple possible providers to open a browser on linux
+	// One of them is xdg-open, another is x-www-browser, then there's www-browser, etc.
+	// Look for one that exists and run it
+	for _, provider := range providers {
+		if _, err := exec.LookPath(provider); err == nil {
+			return runCmd(provider, url)
+		}
+	}
+
+	return &exec.Error{Name: strings.Join(providers, ","), Err: exec.ErrNotFound}
+}
+
+func setFlags(cmd *exec.Cmd) {}

vendor/github.com/pkg/browser/browser_openbsd.go

@@ -0,0 +1,16 @@
+package browser
+
+import (
+	"errors"
+	"os/exec"
+)
+
+func openBrowser(url string) error {
+	err := runCmd("xdg-open", url)
+	if e, ok := err.(*exec.Error); ok && e.Err == exec.ErrNotFound {
+		return errors.New("xdg-open: command not found - install xdg-utils from ports(8)")
+	}
+	return err
+}
+
+func setFlags(cmd *exec.Cmd) {}

vendor/github.com/pkg/browser/browser_unsupported.go

@@ -0,0 +1,15 @@
+// +build !linux,!windows,!darwin,!openbsd,!freebsd
+
+package browser
+
+import (
+	"fmt"
+	"os/exec"
+	"runtime"
+)
+
+func openBrowser(url string) error {
+	return fmt.Errorf("openBrowser: unsupported operating system: %v", runtime.GOOS)
+}
+
+func setFlags(cmd *exec.Cmd) {}

vendor/github.com/pkg/browser/browser_windows.go

@@ -0,0 +1,13 @@
+//go:generate mkwinsyscall -output zbrowser_windows.go browser_windows.go
+//sys ShellExecute(hwnd int, verb string, file string, args string, cwd string, showCmd int) (err error) = shell32.ShellExecuteW
+package browser
+
+import "os/exec"
+const SW_SHOWNORMAL = 1
+
+func openBrowser(url string) error {
+   return ShellExecute(0, "", url, "", "", SW_SHOWNORMAL)
+}
+
+func setFlags(cmd *exec.Cmd) {
+}

vendor/github.com/pkg/browser/zbrowser_windows.go

@@ -0,0 +1,76 @@
+// Code generated by 'go generate'; DO NOT EDIT.
+
+package browser
+
+import (
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/sys/windows"
+)
+
+var _ unsafe.Pointer
+
+// Do the interface allocations only once for common
+// Errno values.
+const (
+	errnoERROR_IO_PENDING = 997
+)
+
+var (
+	errERROR_IO_PENDING error = syscall.Errno(errnoERROR_IO_PENDING)
+	errERROR_EINVAL     error = syscall.EINVAL
+)
+
+// errnoErr returns common boxed Errno values, to prevent
+// allocations at runtime.
+func errnoErr(e syscall.Errno) error {
+	switch e {
+	case 0:
+		return errERROR_EINVAL
+	case errnoERROR_IO_PENDING:
+		return errERROR_IO_PENDING
+	}
+	// TODO: add more here, after collecting data on the common
+	// error values see on Windows. (perhaps when running
+	// all.bat?)
+	return e
+}
+
+var (
+	modshell32 = windows.NewLazySystemDLL("shell32.dll")
+
+	procShellExecuteW = modshell32.NewProc("ShellExecuteW")
+)
+
+func ShellExecute(hwnd int, verb string, file string, args string, cwd string, showCmd int) (err error) {
+	var _p0 *uint16
+	_p0, err = syscall.UTF16PtrFromString(verb)
+	if err != nil {
+		return
+	}
+	var _p1 *uint16
+	_p1, err = syscall.UTF16PtrFromString(file)
+	if err != nil {
+		return
+	}
+	var _p2 *uint16
+	_p2, err = syscall.UTF16PtrFromString(args)
+	if err != nil {
+		return
+	}
+	var _p3 *uint16
+	_p3, err = syscall.UTF16PtrFromString(cwd)
+	if err != nil {
+		return
+	}
+	return _ShellExecute(hwnd, _p0, _p1, _p2, _p3, showCmd)
+}
+
+func _ShellExecute(hwnd int, verb *uint16, file *uint16, args *uint16, cwd *uint16, showCmd int) (err error) {
+	r1, _, e1 := syscall.Syscall6(procShellExecuteW.Addr(), 6, uintptr(hwnd), uintptr(unsafe.Pointer(verb)), uintptr(unsafe.Pointer(file)), uintptr(unsafe.Pointer(args)), uintptr(unsafe.Pointer(cwd)), uintptr(showCmd))
+	if r1 == 0 {
+		err = errnoErr(e1)
+	}
+	return
+}