auto-update

Add the `podman auto-update` command. There have been no tests in v1, so
there are no in v2 either ... for now :)

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

5 files changed, 79 insertions, 0 deletions

diff --git a/cmd/podman/auto-update.go b/cmd/podman/auto-update.go
new file mode 100644
index 000000000..758cbbc6f
--- /dev/null
+++ b/cmd/podman/auto-update.go
@@ -0,0 +1,46 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/containers/libpod/cmd/podman/registry"
+	"github.com/containers/libpod/pkg/domain/entities"
+	"github.com/containers/libpod/pkg/errorhandling"
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+)
+
+var (
+	autoUpdateDescription = `Auto update containers according to their auto-update policy.
+
+  Auto-update policies are specified with the "io.containers.autoupdate" label.
+  Note that this command is experimental.`
+	autoUpdateCommand = &cobra.Command{
+		Use:     "auto-update [flags]",
+		Short:   "Auto update containers according to their auto-update policy",
+		Long:    autoUpdateDescription,
+		RunE:    autoUpdate,
+		Example: `podman auto-update`,
+	}
+)
+
+func init() {
+	registry.Commands = append(registry.Commands, registry.CliCommand{
+		Mode:    []entities.EngineMode{entities.ABIMode},
+		Command: autoUpdateCommand,
+	})
+}
+
+func autoUpdate(cmd *cobra.Command, args []string) error {
+	if len(args) > 0 {
+		// Backwards compat. System tests expext this error string.
+		return errors.Errorf("`%s` takes no arguments", cmd.CommandPath())
+	}
+	report, failures := registry.ContainerEngine().AutoUpdate(registry.GetContext())
+	if report != nil {
+		for _, unit := range report.Units {
+			fmt.Println(unit)
+		}
+	}
+	return errorhandling.JoinErrors(failures)
+}
diff --git a/pkg/domain/entities/auto-update.go b/pkg/domain/entities/auto-update.go
new file mode 100644
index 000000000..aef8fc46b
--- /dev/null
+++ b/pkg/domain/entities/auto-update.go
@@ -0,0 +1,7 @@
+package entities
+
+// AutoUpdateReport contains the results from running auto-update.
+type AutoUpdateReport struct {
+	// Units - the restarted systemd units during auto-update.
+	Units []string
+}
diff --git a/pkg/domain/entities/engine_container.go b/pkg/domain/entities/engine_container.go
index 1bfac4514..33dbe5120 100644
--- a/pkg/domain/entities/engine_container.go
+++ b/pkg/domain/entities/engine_container.go
@@ -10,6 +10,7 @@ import (
 )
 
 type ContainerEngine interface {
+	AutoUpdate(ctx context.Context) (*AutoUpdateReport, []error)
 	Config(ctx context.Context) (*config.Config, error)
 	ContainerAttach(ctx context.Context, nameOrId string, options AttachOptions) error
 	ContainerCheckpoint(ctx context.Context, namesOrIds []string, options CheckpointOptions) ([]*CheckpointReport, error)
diff --git a/pkg/domain/infra/abi/auto-update.go b/pkg/domain/infra/abi/auto-update.go
new file mode 100644
index 000000000..aa20664b4
--- /dev/null
+++ b/pkg/domain/infra/abi/auto-update.go
@@ -0,0 +1,13 @@
+package abi
+
+import (
+	"context"
+
+	"github.com/containers/libpod/pkg/autoupdate"
+	"github.com/containers/libpod/pkg/domain/entities"
+)
+
+func (ic *ContainerEngine) AutoUpdate(ctx context.Context) (*entities.AutoUpdateReport, []error) {
+	units, failures := autoupdate.AutoUpdate(ic.Libpod)
+	return &entities.AutoUpdateReport{Units: units}, failures
+}
diff --git a/pkg/domain/infra/tunnel/auto-update.go b/pkg/domain/infra/tunnel/auto-update.go
new file mode 100644
index 000000000..fac033050
--- /dev/null
+++ b/pkg/domain/infra/tunnel/auto-update.go
@@ -0,0 +1,12 @@
+package tunnel
+
+import (
+	"context"
+
+	"github.com/containers/libpod/pkg/domain/entities"
+	"github.com/pkg/errors"
+)
+
+func (ic *ContainerEngine) AutoUpdate(ctx context.Context) (*entities.AutoUpdateReport, []error) {
+	return nil, []error{errors.New("not implemented")}
+}