Clean up go.sum by running

builder/xenserver/common/common_config.go

@@ -9,10 +9,13 @@ import (
 	"github.com/hashicorp/packer-plugin-sdk/common"
 	"github.com/hashicorp/packer-plugin-sdk/multistep"
 	"github.com/hashicorp/packer-plugin-sdk/template/interpolate"
+	"github.com/hashicorp/packer-plugin-sdk/bootcommand"
 	xenapi "github.com/terra-farm/go-xen-api-client"
 )
 
 type CommonConfig struct {
+	bootcommand.VNCConfig          `mapstructure:",squash"`
+
 	Username string `mapstructure:"remote_username"`
 	Password string `mapstructure:"remote_password"`
 	HostIp   string `mapstructure:"remote_host"`
@@ -28,7 +31,6 @@ type CommonConfig struct {
 	HostPortMin uint `mapstructure:"host_port_min"`
 	HostPortMax uint `mapstructure:"host_port_max"`
 
-	BootCommand     []string `mapstructure:"boot_command"`
 	ShutdownCommand string   `mapstructure:"shutdown_command"`
 
 	RawBootWait string `mapstructure:"boot_wait"`

builder/xenserver/common/step_type_boot_command.go

@@ -1,8 +1,7 @@
 package common
 
-/* Heavily borrowed from builder/quemu/step_type_boot_command.go */
-
 import (
+	"bufio"
 	"context"
 	"crypto/tls"
 	"fmt"
@@ -10,10 +9,8 @@ import (
 	"log"
 	"net"
 	"strings"
-	"time"
-	"unicode"
-	"unicode/utf8"
 
+	"github.com/hashicorp/packer-plugin-sdk/bootcommand"
 	"github.com/hashicorp/packer-plugin-sdk/multistep"
 	"github.com/hashicorp/packer-plugin-sdk/packer"
 	"github.com/hashicorp/packer-plugin-sdk/template/interpolate"
@@ -105,18 +102,43 @@ func (self *StepTypeBootCommand) Run(ctx context.Context, state multistep.StateB
 		return multistep.ActionHalt
 	}
 
-	buffer := make([]byte, 10000)
-	_, err = tlsConn.Read(buffer)
-	if err != nil && err != io.EOF {
-		err := fmt.Errorf("failed to read vnc session response: %v", err)
-		state.Put("error", err)
-		ui.Error(err.Error())
-		return multistep.ActionHalt
+	// Look for \r\n\r\n sequence. Everything after the HTTP Header is for the vnc client.
+	reader := bufio.NewReader(tlsConn)
+	var httpResp string
+	for {
+		httpResp, err = reader.ReadString('\r')
+		if err != nil {
+			err := fmt.Errorf("failed to start vnc session: %v", err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+
+		// Peek at the next three bytes to see if it contains the remaining \n\r\n
+		var b []byte
+		b, err = reader.Peek(3)
+		if err != nil {
+			e := fmt.Errorf("failed to start vnc session: %v", err)
+			state.Put("error", e)
+			ui.Error(e.Error())
+			return multistep.ActionHalt
+		}
+
+		if b[0] == '\n' && b[1] == '\r' && b[2] == '\n' {
+			if _, err = reader.Discard(3); err != nil {
+				e := fmt.Errorf("failed to start vnc session: %v", err)
+				state.Put("error", e)
+				ui.Error(e.Error())
+				return multistep.ActionHalt
+			}
+
+			break
+		}
 	}
 
-	ui.Say(fmt.Sprintf("Received response: %s", string(buffer)))
+	ui.Say(fmt.Sprintf("Received response: %s", httpResp))
 
-	vncClient, err := vnc.Client(tlsConn, &vnc.ClientConfig{Exclusive: true})
+	vncClient, err := vnc.Client(tlsConn, &vnc.ClientConfig{Exclusive: false})
 
 	if err != nil {
 		err := fmt.Errorf("Error establishing VNC session: %s", err)
@@ -148,23 +170,33 @@ func (self *StepTypeBootCommand) Run(ctx context.Context, state multistep.StateB
 		uint(httpPort),
 	}
 
+	vncDriver := bootcommand.NewVNCDriver(vncClient, config.VNCConfig.BootKeyInterval)
+
 	ui.Say("Typing boot commands over VNC...")
-	for _, command := range config.BootCommand {
 
-		command, err := interpolate.Render(command, &self.Ctx)
-		if err != nil {
-			err := fmt.Errorf("Error preparing boot command: %s", err)
-			state.Put("error", err)
-			ui.Error(err.Error())
-			return multistep.ActionHalt
-		}
+	command, err := interpolate.Render(config.VNCConfig.FlatBootCommand(), &self.Ctx)
 
-		// Check for interrupts
-		if _, ok := state.GetOk(multistep.StateCancelled); ok {
-			return multistep.ActionHalt
-		}
+	if err != nil {
+		err := fmt.Errorf("Error preparing boot command: %s", err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
 
-		vncSendString(vncClient, command)
+	seq, err := bootcommand.GenerateExpressionSequence(command)
+
+	if err != nil {
+		err := fmt.Errorf("Error generating boot command: %s", err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	if err := seq.Do(ctx, vncDriver); err != nil {
+		err := fmt.Errorf("Error running boot command: %s", err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
 	}
 
 	ui.Say("Finished typing.")
@@ -173,100 +205,3 @@ func (self *StepTypeBootCommand) Run(ctx context.Context, state multistep.StateB
 }
 
 func (self *StepTypeBootCommand) Cleanup(multistep.StateBag) {}
-
-// Taken from qemu's builder plugin - not an exported function.
-func vncSendString(c *vnc.ClientConn, original string) {
-	// Scancodes reference: https://github.com/qemu/qemu/blob/master/ui/vnc_keysym.h
-	special := make(map[string]uint32)
-	special["<bs>"] = 0xFF08
-	special["<del>"] = 0xFFFF
-	special["<enter>"] = 0xFF0D
-	special["<esc>"] = 0xFF1B
-	special["<f1>"] = 0xFFBE
-	special["<f2>"] = 0xFFBF
-	special["<f3>"] = 0xFFC0
-	special["<f4>"] = 0xFFC1
-	special["<f5>"] = 0xFFC2
-	special["<f6>"] = 0xFFC3
-	special["<f7>"] = 0xFFC4
-	special["<f8>"] = 0xFFC5
-	special["<f9>"] = 0xFFC6
-	special["<f10>"] = 0xFFC7
-	special["<f11>"] = 0xFFC8
-	special["<f12>"] = 0xFFC9
-	special["<return>"] = 0xFF0D
-	special["<tab>"] = 0xFF09
-	special["<up>"] = 0xFF52
-	special["<down>"] = 0xFF54
-	special["<left>"] = 0xFF51
-	special["<right>"] = 0xFF53
-	special["<spacebar>"] = 0x020
-	special["<insert>"] = 0xFF63
-	special["<home>"] = 0xFF50
-	special["<end>"] = 0xFF57
-	special["<pageUp>"] = 0xFF55
-	special["<pageDown>"] = 0xFF56
-
-	shiftedChars := "~!@#$%^&*()_+{}|:\"<>?"
-
-	// TODO(mitchellh): Ripe for optimizations of some point, perhaps.
-	for len(original) > 0 {
-		var keyCode uint32
-		keyShift := false
-
-		if strings.HasPrefix(original, "<wait>") {
-			log.Printf("Special code '<wait>' found, sleeping one second")
-			time.Sleep(1 * time.Second)
-			original = original[len("<wait>"):]
-			continue
-		}
-
-		if strings.HasPrefix(original, "<wait5>") {
-			log.Printf("Special code '<wait5>' found, sleeping 5 seconds")
-			time.Sleep(5 * time.Second)
-			original = original[len("<wait5>"):]
-			continue
-		}
-
-		if strings.HasPrefix(original, "<wait10>") {
-			log.Printf("Special code '<wait10>' found, sleeping 10 seconds")
-			time.Sleep(10 * time.Second)
-			original = original[len("<wait10>"):]
-			continue
-		}
-
-		for specialCode, specialValue := range special {
-			if strings.HasPrefix(original, specialCode) {
-				log.Printf("Special code '%s' found, replacing with: %d", specialCode, specialValue)
-				keyCode = specialValue
-				original = original[len(specialCode):]
-				break
-			}
-		}
-
-		if keyCode == 0 {
-			r, size := utf8.DecodeRuneInString(original)
-			original = original[size:]
-			keyCode = uint32(r)
-			keyShift = unicode.IsUpper(r) || strings.ContainsRune(shiftedChars, r)
-
-			log.Printf("Sending char '%c', code %d, shift %v", r, keyCode, keyShift)
-		}
-
-		if keyShift {
-			c.KeyEvent(uint32(KeyLeftShift), true)
-		}
-
-		c.KeyEvent(keyCode, true)
-		time.Sleep(time.Second / 10)
-		c.KeyEvent(keyCode, false)
-		time.Sleep(time.Second / 10)
-
-		if keyShift {
-			c.KeyEvent(uint32(KeyLeftShift), false)
-		}
-
-		// no matter what, wait a small period
-		time.Sleep(50 * time.Millisecond)
-	}
-}

go.sum

@@ -159,7 +159,6 @@ github.com/go-resty/resty/v2 v2.1.1-0.20191201195748-d7b97669fe48/go.mod h1:dZGr
 github.com/go-resty/resty/v2 v2.3.0/go.mod h1:UpN9CgLZNsv4e9XG50UU8xdI0F43UQ4HmxLBDwaroHU=
 github.com/go-sql-driver/mysql v1.5.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
 github.com/go-test/deep v1.0.2-0.20181118220953-042da051cf31/go.mod h1:wGDj63lr65AM2AQyKZd/NYHGb0R+1RLqB8NKt3aSFNA=
-github.com/go-test/deep v1.0.3 h1:ZrJSEWsXzPOxaZnFteGEfooLba+ju3FYIbOrS+rQd68=
 github.com/go-test/deep v1.0.3/go.mod h1:wGDj63lr65AM2AQyKZd/NYHGb0R+1RLqB8NKt3aSFNA=
 github.com/gobwas/glob v0.2.3/go.mod h1:d3Ez4x06l9bZtSvzIay5+Yzi0fmZzPgnTbPcKjJAkT8=
 github.com/gofrs/flock v0.7.3 h1:I0EKY9l8HZCXTMYC4F80vwT6KNypV9uYKP3Alm/hjmQ=
@@ -379,12 +378,10 @@ github.com/kr/fs v0.0.0-20131111012553-2788f0dbd169/go.mod h1:glhvuHOU9Hy7/8Pwwd
 github.com/kr/fs v0.1.0 h1:Jskdu9ieNAYnjxsi0LbQp1ulIKZV1LAFgK1tWhpZgl8=
 github.com/kr/fs v0.1.0/go.mod h1:FFnZGqtBN9Gxj7eW1uZ42v5BccTP0vu6NEaFoC2HwRg=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
-github.com/kr/pretty v0.2.0 h1:s5hAObm+yFO5uHYt5dYjxi2rXrsnmRpJx4OYvIWUaQs=
 github.com/kr/pretty v0.2.0/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
-github.com/kylelemons/godebug v0.0.0-20170820004349-d65d576e9348 h1:MtvEpTB6LX3vkb4ax0b5D2DHbNAUsen0Gx5wZoq3lV4=
 github.com/kylelemons/godebug v0.0.0-20170820004349-d65d576e9348/go.mod h1:B69LEHPfb2qLo0BaaOLcbitczOKLWTsrBG9LczfCD4k=
 github.com/linode/linodego v0.14.0/go.mod h1:2ce3S00NrDqJfp4i55ZuSlT0U3cKNELNYACWBPI8Tnw=
 github.com/masterzen/simplexml v0.0.0-20160608183007-4572e39b1ab9/go.mod h1:kCEbxUJlNDEBNbdQMkPSp6yaKcRXVI6f4ddk8Riv4bc=
@@ -591,6 +588,7 @@ golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPI
 golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
 golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
 golang.org/x/mobile v0.0.0-20191130191448-5c0e7e404af8/go.mod h1:p895TfNkDgPEmEQrNiOtIl3j98d/tGU95djDj7NfyjQ=
+golang.org/x/mobile v0.0.0-20201208152944-da85bec010a2 h1:3HADozU50HyrJ2jklLtr3xr0itFkz9u4LxCJhqKVdjI=
 golang.org/x/mobile v0.0.0-20201208152944-da85bec010a2/go.mod h1:skQtrUTUwhdJvXM/2KKJzY8pDgNr9I/FOMqDVRPBUS4=
 golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
 golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=