Add podman machine list

podman machine list lists all virtual machines & indicates the default VM
connection, if it exists. it also can take a --format flag arg as a go
template.

[NO TESTS NEEDED]

Signed-off-by: Ashley Cui <acui@redhat.com>

2 files changed, 61 insertions, 0 deletions

diff --git a/pkg/machine/config.go b/pkg/machine/config.go
index 273deca00..554ea7c97 100644
--- a/pkg/machine/config.go
+++ b/pkg/machine/config.go
@@ -5,6 +5,7 @@ import (
 	"net/url"
 	"os"
 	"path/filepath"
+	"time"
 
 	"github.com/containers/storage/pkg/homedir"
 	"github.com/pkg/errors"
@@ -44,6 +45,16 @@ type Download struct {
 	VMName                string
 }
 
+type ListOptions struct{}
+
+type ListResponse struct {
+	Name      string
+	CreatedAt time.Time
+	LastUp    time.Time
+	Running   bool
+	VMType    string
+}
+
 type SSHOptions struct {
 	Execute bool
 	Args    []string
diff --git a/pkg/machine/qemu/machine.go b/pkg/machine/qemu/machine.go
index 652a077cc..58486fc73 100644
--- a/pkg/machine/qemu/machine.go
+++ b/pkg/machine/qemu/machine.go
@@ -10,6 +10,7 @@ import (
 	"os/exec"
 	"path/filepath"
 	"strconv"
+	"strings"
 	"time"
 
 	"github.com/containers/podman/v3/pkg/machine"
@@ -426,3 +427,52 @@ func getDiskSize(path string) (uint64, error) {
 	}
 	return tmpInfo.VirtualSize, nil
 }
+
+// List lists all vm's that use qemu virtualization
+func List(opts machine.ListOptions) ([]*machine.ListResponse, error) {
+	vmConfigDir, err := machine.GetConfDir(vmtype)
+	if err != nil {
+		return nil, err
+	}
+
+	var listed []*machine.ListResponse
+
+	if err = filepath.Walk(vmConfigDir, func(path string, info os.FileInfo, err error) error {
+		vm := new(MachineVM)
+		if strings.HasSuffix(info.Name(), ".json") {
+			fullPath := filepath.Join(vmConfigDir, info.Name())
+			b, err := ioutil.ReadFile(fullPath)
+			if err != nil {
+				return err
+			}
+			err = json.Unmarshal(b, vm)
+			if err != nil {
+				return err
+			}
+			listEntry := new(machine.ListResponse)
+
+			listEntry.Name = vm.Name
+			listEntry.VMType = "qemu"
+			fi, err := os.Stat(fullPath)
+			if err != nil {
+				return err
+			}
+			listEntry.CreatedAt = fi.ModTime()
+
+			fi, err = os.Stat(vm.ImagePath)
+			if err != nil {
+				return err
+			}
+			listEntry.LastUp = fi.ModTime()
+			if vm.isRunning() {
+				listEntry.Running = true
+			}
+
+			listed = append(listed, listEntry)
+		}
+		return nil
+	}); err != nil {
+		return nil, err
+	}
+	return listed, err
+}