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driver.go
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driver.go
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package common
import (
"bytes"
"fmt"
"log"
"os/exec"
"regexp"
"runtime"
"strconv"
"strings"
"github.com/mitchellh/multistep"
)
// A driver is able to talk to VMware, control virtual machines, etc.
type Driver interface {
// Clone clones the VMX and the disk to the destination path. The
// destination is a path to the VMX file. The disk will be copied
// to that same directory.
Clone(dst string, src string) error
// CompactDisk compacts a virtual disk.
CompactDisk(string) error
// CreateDisk creates a virtual disk with the given size.
CreateDisk(string, string, string) error
// Checks if the VMX file at the given path is running.
IsRunning(string) (bool, error)
// CommHost returns the host address for the VM that is being
// managed by this driver.
CommHost(multistep.StateBag) (string, error)
// Start starts a VM specified by the path to the VMX given.
Start(string, bool) error
// Stop stops a VM specified by the path to the VMX given.
Stop(string) error
// SuppressMessages modifies the VMX or surrounding directory so that
// VMware doesn't show any annoying messages.
SuppressMessages(string) error
// Get the path to the VMware ISO for the given flavor.
ToolsIsoPath(string) string
// Attach the VMware tools ISO
ToolsInstall() error
// Get the path to the DHCP leases file for the given device.
DhcpLeasesPath(string) string
// Verify checks to make sure that this driver should function
// properly. This should check that all the files it will use
// appear to exist and so on. If everything is okay, this doesn't
// return an error. Otherwise, this returns an error.
Verify() error
}
// NewDriver returns a new driver implementation for this operating
// system, or an error if the driver couldn't be initialized.
func NewDriver(dconfig *DriverConfig, config *SSHConfig) (Driver, error) {
drivers := []Driver{}
switch runtime.GOOS {
case "darwin":
drivers = []Driver{
&Fusion6Driver{
Fusion5Driver: Fusion5Driver{
AppPath: dconfig.FusionAppPath,
SSHConfig: config,
},
},
&Fusion5Driver{
AppPath: dconfig.FusionAppPath,
SSHConfig: config,
},
}
case "linux":
fallthrough
case "windows":
drivers = []Driver{
&Workstation10Driver{
Workstation9Driver: Workstation9Driver{
SSHConfig: config,
},
},
&Workstation9Driver{
SSHConfig: config,
},
&Player6Driver{
Player5Driver: Player5Driver{
SSHConfig: config,
},
},
&Player5Driver{
SSHConfig: config,
},
}
default:
return nil, fmt.Errorf("can't find driver for OS: %s", runtime.GOOS)
}
errs := ""
for _, driver := range drivers {
err := driver.Verify()
if err == nil {
return driver, nil
}
errs += "* " + err.Error() + "\n"
}
return nil, fmt.Errorf(
"Unable to initialize any driver for this platform. The errors\n"+
"from each driver are shown below. Please fix at least one driver\n"+
"to continue:\n%s", errs)
}
func runAndLog(cmd *exec.Cmd) (string, string, error) {
var stdout, stderr bytes.Buffer
log.Printf("Executing: %s %s", cmd.Path, strings.Join(cmd.Args[1:], " "))
cmd.Stdout = &stdout
cmd.Stderr = &stderr
err := cmd.Run()
stdoutString := strings.TrimSpace(stdout.String())
stderrString := strings.TrimSpace(stderr.String())
if _, ok := err.(*exec.ExitError); ok {
message := stderrString
if message == "" {
message = stdoutString
}
err = fmt.Errorf("VMware error: %s", message)
// If "unknown error" is in there, add some additional notes
re := regexp.MustCompile(`(?i)unknown error`)
if re.MatchString(message) {
err = fmt.Errorf(
"%s\n\n%s", err,
"Packer detected a VMware 'Unknown Error'. Unfortunately VMware\n"+
"often has extremely vague error messages such as this and Packer\n"+
"itself can't do much about that. Please check the vmware.log files\n"+
"created by VMware when a VM is started (in the directory of the\n"+
"vmx file), which often contains more detailed error information.")
}
}
log.Printf("stdout: %s", stdoutString)
log.Printf("stderr: %s", stderrString)
// Replace these for Windows, we only want to deal with Unix
// style line endings.
returnStdout := strings.Replace(stdout.String(), "\r\n", "\n", -1)
returnStderr := strings.Replace(stderr.String(), "\r\n", "\n", -1)
return returnStdout, returnStderr, err
}
func normalizeVersion(version string) (string, error) {
i, err := strconv.Atoi(version)
if err != nil {
return "", fmt.Errorf(
"VMware version '%s' is not numeric", version)
}
return fmt.Sprintf("%02d", i), nil
}
func compareVersions(versionFound string, versionWanted string, product string) error {
found, err := normalizeVersion(versionFound)
if err != nil {
return err
}
wanted, err := normalizeVersion(versionWanted)
if err != nil {
return err
}
if found < wanted {
return fmt.Errorf(
"VMware %s version %s, or greater, is required. Found version: %s", product, versionWanted, versionFound)
}
return nil
}