3 files changed, 231 insertions, 0 deletions
diff --git a/cmd/podman/registry/config.go b/cmd/podman/registry/config.go
new file mode 100644
index 000000000..358f9172e
--- /dev/null
+++ b/cmd/podman/registry/config.go
@@ -0,0 +1,106 @@
+package registry
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+
+	"github.com/containers/common/pkg/config"
+	"github.com/containers/libpod/pkg/domain/entities"
+	"github.com/containers/libpod/pkg/rootless"
+	"github.com/containers/libpod/pkg/util"
+	"github.com/pkg/errors"
+)
+
+const (
+	ParentNSRequired = "ParentNSRequired"
+)
+
+var (
+	PodmanOptions entities.PodmanConfig
+)
+
+// NewPodmanConfig creates a PodmanConfig from the environment
+func NewPodmanConfig() entities.PodmanConfig {
+	if err := setXdgDirs(); err != nil {
+		fmt.Fprintf(os.Stderr, err.Error())
+		os.Exit(1)
+	}
+
+	var mode entities.EngineMode
+	switch runtime.GOOS {
+	case "darwin":
+		fallthrough
+	case "windows":
+		mode = entities.TunnelMode
+	case "linux":
+		mode = entities.ABIMode
+	default:
+		fmt.Fprintf(os.Stderr, "%s is not a supported OS", runtime.GOOS)
+		os.Exit(1)
+	}
+
+	// cobra.Execute() may not be called yet, so we peek at os.Args.
+	for _, v := range os.Args {
+		// Prefix checking works because of how default EngineMode's
+		// have been defined.
+		if strings.HasPrefix(v, "--remote") {
+			mode = entities.TunnelMode
+		}
+	}
+
+	// FIXME: for rootless, add flag to get the path to override configuration
+	cfg, err := config.NewConfig("")
+	if err != nil {
+		fmt.Fprint(os.Stderr, "Failed to obtain podman configuration: "+err.Error())
+		os.Exit(1)
+	}
+
+	cfg.Network.NetworkConfigDir = cfg.Network.CNIPluginDirs[0]
+	if rootless.IsRootless() {
+		cfg.Network.NetworkConfigDir = ""
+	}
+
+	return entities.PodmanConfig{Config: cfg, EngineMode: mode}
+}
+
+// SetXdgDirs ensures the XDG_RUNTIME_DIR env and XDG_CONFIG_HOME variables are set.
+// containers/image uses XDG_RUNTIME_DIR to locate the auth file, XDG_CONFIG_HOME is
+// use for the libpod.conf configuration file.
+func setXdgDirs() error {
+	if !rootless.IsRootless() {
+		return nil
+	}
+
+	// Setup XDG_RUNTIME_DIR
+	if _, found := os.LookupEnv("XDG_RUNTIME_DIR"); !found {
+		dir, err := util.GetRuntimeDir()
+		if err != nil {
+			return err
+		}
+		if err := os.Setenv("XDG_RUNTIME_DIR", dir); err != nil {
+			return errors.Wrapf(err, "cannot set XDG_RUNTIME_DIR="+dir)
+		}
+	}
+
+	if _, found := os.LookupEnv("DBUS_SESSION_BUS_ADDRESS"); !found {
+		sessionAddr := filepath.Join(os.Getenv("XDG_RUNTIME_DIR"), "bus")
+		if _, err := os.Stat(sessionAddr); err == nil {
+			os.Setenv("DBUS_SESSION_BUS_ADDRESS", "unix:path="+sessionAddr)
+		}
+	}
+
+	// Setup XDG_CONFIG_HOME
+	if _, found := os.LookupEnv("XDG_CONFIG_HOME"); !found {
+		cfgHomeDir, err := util.GetRootlessConfigHomeDir()
+		if err != nil {
+			return err
+		}
+		if err := os.Setenv("XDG_CONFIG_HOME", cfgHomeDir); err != nil {
+			return errors.Wrapf(err, "cannot set XDG_CONFIG_HOME="+cfgHomeDir)
+		}
+	}
+	return nil
+}
diff --git a/cmd/podman/registry/registry.go b/cmd/podman/registry/registry.go
new file mode 100644
index 000000000..1c5e5d21b
--- /dev/null
+++ b/cmd/podman/registry/registry.go
@@ -0,0 +1,116 @@
+package registry
+
+import (
+	"context"
+
+	"github.com/containers/libpod/pkg/domain/entities"
+	"github.com/containers/libpod/pkg/domain/infra"
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+)
+
+// DefaultAPIAddress is the default address of the REST socket
+const DefaultAPIAddress = "unix:/run/podman/podman.sock"
+
+// DefaultVarlinkAddress is the default address of the varlink socket
+const DefaultVarlinkAddress = "unix:/run/podman/io.podman"
+
+type CliCommand struct {
+	Mode    []entities.EngineMode
+	Command *cobra.Command
+	Parent  *cobra.Command
+}
+
+const ExecErrorCodeGeneric = 125
+
+var (
+	cliCtx          context.Context
+	containerEngine entities.ContainerEngine
+	exitCode        = ExecErrorCodeGeneric
+	imageEngine     entities.ImageEngine
+
+	// Commands holds the cobra.Commands to present to the user, including
+	// parent if not a child of "root"
+	Commands []CliCommand
+)
+
+func SetExitCode(code int) {
+	exitCode = code
+}
+
+func GetExitCode() int {
+	return exitCode
+}
+
+func ImageEngine() entities.ImageEngine {
+	return imageEngine
+}
+
+// NewImageEngine is a wrapper for building an ImageEngine to be used for PreRunE functions
+func NewImageEngine(cmd *cobra.Command, args []string) (entities.ImageEngine, error) {
+	if imageEngine == nil {
+		PodmanOptions.FlagSet = cmd.Flags()
+		engine, err := infra.NewImageEngine(PodmanOptions)
+		if err != nil {
+			return nil, err
+		}
+		imageEngine = engine
+	}
+	return imageEngine, nil
+}
+
+func ContainerEngine() entities.ContainerEngine {
+	return containerEngine
+}
+
+// NewContainerEngine is a wrapper for building an ContainerEngine to be used for PreRunE functions
+func NewContainerEngine(cmd *cobra.Command, args []string) (entities.ContainerEngine, error) {
+	if containerEngine == nil {
+		PodmanOptions.FlagSet = cmd.Flags()
+		engine, err := infra.NewContainerEngine(PodmanOptions)
+		if err != nil {
+			return nil, err
+		}
+		containerEngine = engine
+	}
+	return containerEngine, nil
+}
+
+func SubCommandExists(cmd *cobra.Command, args []string) error {
+	if len(args) > 0 {
+		return errors.Errorf("unrecognized command `%[1]s %[2]s`\nTry '%[1]s --help' for more information.", cmd.CommandPath(), args[0])
+	}
+	return errors.Errorf("missing command '%[1]s COMMAND'\nTry '%[1]s --help' for more information.", cmd.CommandPath())
+}
+
+// IdOrLatestArgs used to validate a nameOrId was provided or the "--latest" flag
+func IdOrLatestArgs(cmd *cobra.Command, args []string) error {
+	if len(args) > 1 || (len(args) == 0 && !cmd.Flag("latest").Changed) {
+		return errors.New(`command requires a name, id  or the "--latest" flag`)
+	}
+	return nil
+}
+
+type PodmanOptionsKey struct{}
+
+func Context() context.Context {
+	if cliCtx == nil {
+		cliCtx = ContextWithOptions(context.Background())
+	}
+	return cliCtx
+}
+
+func ContextWithOptions(ctx context.Context) context.Context {
+	cliCtx = context.WithValue(ctx, PodmanOptionsKey{}, PodmanOptions)
+	return cliCtx
+}
+
+// GetContextWithOptions deprecated, use  NewContextWithOptions()
+func GetContextWithOptions() context.Context {
+	return ContextWithOptions(context.Background())
+}
+
+// GetContext deprecated, use  Context()
+func GetContext() context.Context {
+	return Context()
+}
diff --git a/cmd/podman/registry/remote.go b/cmd/podman/registry/remote.go
new file mode 100644
index 000000000..5378701e7
--- /dev/null
+++ b/cmd/podman/registry/remote.go
@@ -0,0 +1,9 @@
+package registry
+
+import (
+	"github.com/containers/libpod/pkg/domain/entities"
+)
+
+func IsRemote() bool {
+	return PodmanOptions.EngineMode == entities.TunnelMode
+}