Machine refactor - part 1

the way machine was written was very adjunct and as such is in dire need
of refactoring to better structures and structure methods where
appropriate.  the weekest part is specifically around all the files that
machine requires and how some are just dynamically built on the fly.

this pr defines a new machinefile type which allows us to work with the
file and also takes into account the use of symlinks which are going to
be needed on macos due to its relatively short file length restriction.

also, added unit tests for new methods as well as anywhere else I saw a
need.

Signed-off-by: Brent Baude <bbaude@redhat.com>

1 files changed, 15 insertions, 9 deletions

diff --git a/pkg/machine/qemu/machine.go b/pkg/machine/qemu/machine.go
index f04625781..ac8e7d75c 100644
--- a/pkg/machine/qemu/machine.go
+++ b/pkg/machine/qemu/machine.go
@@ -111,7 +111,7 @@ func (p *Provider) NewMachine(opts machine.InitOptions) (machine.VM, error) {
 		return nil, err
 	}
 	vm.QMPMonitor = monitor
-	cmd = append(cmd, []string{"-qmp", monitor.Network + ":/" + monitor.Address + ",server=on,wait=off"}...)
+	cmd = append(cmd, []string{"-qmp", monitor.Network + ":/" + monitor.Address.GetPath() + ",server=on,wait=off"}...)
 
 	// Add network
 	// Right now the mac address is hardcoded so that the host networking gives it a specific IP address.  This is
@@ -134,7 +134,8 @@ func (p *Provider) NewMachine(opts machine.InitOptions) (machine.VM, error) {
 // LoadByName reads a json file that describes a known qemu vm
 // and returns a vm instance
 func (p *Provider) LoadVMByName(name string) (machine.VM, error) {
-	vm := &MachineVM{UID: -1} // posix reserves -1, so use it to signify undefined
+	vm := &MachineVM{Name: name}
+	vm.HostUser = HostUser{UID: -1} // posix reserves -1, so use it to signify undefined
 	vmConfigDir, err := machine.GetConfDir(vmtype)
 	if err != nil {
 		return nil, err
@@ -176,7 +177,7 @@ func (v *MachineVM) Init(opts machine.InitOptions) (bool, error) {
 	v.Rootful = opts.Rootful
 
 	switch opts.ImagePath {
-	case "testing", "next", "stable", "":
+	case Testing, Next, Stable, "":
 		// Get image as usual
 		v.ImageStream = opts.ImagePath
 		dd, err := machine.NewFcosDownloader(vmtype, v.Name, opts.ImagePath)
@@ -576,12 +577,12 @@ func (v *MachineVM) checkStatus(monitor *qmp.SocketMonitor) (machine.QemuMachine
 func (v *MachineVM) Stop(name string, _ machine.StopOptions) error {
 	var disconnected bool
 	// check if the qmp socket is there. if not, qemu instance is gone
-	if _, err := os.Stat(v.QMPMonitor.Address); os.IsNotExist(err) {
+	if _, err := os.Stat(v.QMPMonitor.Address.GetPath()); os.IsNotExist(err) {
 		// Right now it is NOT an error to stop a stopped machine
 		logrus.Debugf("QMP monitor socket %v does not exist", v.QMPMonitor.Address)
 		return nil
 	}
-	qmpMonitor, err := qmp.NewSocketMonitor(v.QMPMonitor.Network, v.QMPMonitor.Address, v.QMPMonitor.Timeout)
+	qmpMonitor, err := qmp.NewSocketMonitor(v.QMPMonitor.Network, v.QMPMonitor.Address.GetPath(), v.QMPMonitor.Timeout)
 	if err != nil {
 		return err
 	}
@@ -684,20 +685,25 @@ func NewQMPMonitor(network, name string, timeout time.Duration) (Monitor, error)
 	if timeout == 0 {
 		timeout = defaultQMPTimeout
 	}
+	address, err := NewMachineFile(filepath.Join(rtDir, "qmp+"+name+".sock"), nil)
+	if err != nil {
+		return Monitor{}, err
+	}
 	monitor := Monitor{
 		Network: network,
-		Address: filepath.Join(rtDir, "qmp_"+name+".sock"),
+		Address: *address,
 		Timeout: timeout,
 	}
 	return monitor, nil
 }
 
+// Remove deletes all the files associated with a machine including ssh keys, the image itself
 func (v *MachineVM) Remove(name string, opts machine.RemoveOptions) (string, func() error, error) {
 	var (
 		files []string
 	)
 
-	// cannot remove a running vm
+	// cannot remove a running vm unless --force is used
 	running, err := v.isRunning()
 	if err != nil {
 		return "", nil, err
@@ -768,11 +774,11 @@ func (v *MachineVM) Remove(name string, opts machine.RemoveOptions) (string, fun
 
 func (v *MachineVM) isRunning() (bool, error) {
 	// Check if qmp socket path exists
-	if _, err := os.Stat(v.QMPMonitor.Address); os.IsNotExist(err) {
+	if _, err := os.Stat(v.QMPMonitor.Address.GetPath()); os.IsNotExist(err) {
 		return false, nil
 	}
 	// Check if we can dial it
-	monitor, err := qmp.NewSocketMonitor(v.QMPMonitor.Network, v.QMPMonitor.Address, v.QMPMonitor.Timeout)
+	monitor, err := qmp.NewSocketMonitor(v.QMPMonitor.Network, v.QMPMonitor.Address.GetPath(), v.QMPMonitor.Timeout)
 	if err != nil {
 		// FIXME: this error should probably be returned
 		return false, nil // nolint: nilerr