Add basic structure of podman init command

As part of this, rework the number of workers used by various
Podman tasks to match original behavior - need an explicit
fallthrough in the switch statement for that block to work as
expected.

Also, trivial change to Podman cleanup to work on initialized
containers - we need to reset to a different state after cleaning
up the OCI runtime.

Signed-off-by: Matthew Heon <matthew.heon@pm.me>

3 files changed, 74 insertions, 0 deletions

diff --git a/pkg/adapter/containers.go b/pkg/adapter/containers.go
index 9ec897a60..8be4d9d31 100644
--- a/pkg/adapter/containers.go
+++ b/pkg/adapter/containers.go
@@ -133,6 +133,43 @@ func (r *LocalRuntime) KillContainers(ctx context.Context, cli *cliconfig.KillVa
 	return pool.Run()
 }
 
+// InitContainers initializes container(s) based on CLI inputs.
+// Returns list of successful id(s), map of failed id(s) to errors, or a general
+// error not from the container.
+func (r *LocalRuntime) InitContainers(ctx context.Context, cli *cliconfig.InitValues) ([]string, map[string]error, error) {
+	maxWorkers := shared.DefaultPoolSize("init")
+	if cli.GlobalIsSet("max-workers") {
+		maxWorkers = cli.GlobalFlags.MaxWorks
+	}
+	logrus.Debugf("Setting maximum init workers to %d", maxWorkers)
+
+	ctrs, err := shortcuts.GetContainersByContext(cli.All, cli.Latest, cli.InputArgs, r.Runtime)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	pool := shared.NewPool("init", maxWorkers, len(ctrs))
+	for _, c := range ctrs {
+		ctr := c
+
+		pool.Add(shared.Job{
+			ctr.ID(),
+			func() error {
+				err := ctr.Init(ctx)
+				if err != nil {
+					// If we're initializing all containers, ignore invalid state errors
+					if cli.All && errors.Cause(err) == libpod.ErrCtrStateInvalid {
+						return nil
+					}
+					return err
+				}
+				return nil
+			},
+		})
+	}
+	return pool.Run()
+}
+
 // RemoveContainers removes container(s) based on CLI inputs.
 func (r *LocalRuntime) RemoveContainers(ctx context.Context, cli *cliconfig.RmValues) ([]string, map[string]error, error) {
 	var (
diff --git a/pkg/adapter/containers_remote.go b/pkg/adapter/containers_remote.go
index a3a48a564..268ac09e8 100644
--- a/pkg/adapter/containers_remote.go
+++ b/pkg/adapter/containers_remote.go
@@ -234,6 +234,31 @@ func (r *LocalRuntime) StopContainers(ctx context.Context, cli *cliconfig.StopVa
 	return ok, failures, nil
 }
 
+// InitContainers initializes container(s) based on Varlink.
+// It returns a list of successful ID(s), a map of failed container ID to error,
+// or an error if a more general error occurred.
+func (r *LocalRuntime) InitContainers(ctx context.Context, cli *cliconfig.InitValues) ([]string, map[string]error, error) {
+	var (
+		ok       = []string{}
+		failures = map[string]error{}
+	)
+
+	ids, err := iopodman.GetContainersByContext().Call(r.Conn, cli.All, cli.Latest, cli.InputArgs)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	for _, id := range ids {
+		initialized, err := iopodman.InitContainer().Call(r.Conn, id)
+		if err != nil {
+			failures[id] = err
+		} else {
+			ok = append(ok, initialized)
+		}
+	}
+	return ok, failures, nil
+}
+
 // KillContainers sends signal to container(s) based on varlink.
 // Returns list of successful id(s), map of failed id(s) + error, or error not from container
 func (r *LocalRuntime) KillContainers(ctx context.Context, cli *cliconfig.KillValues, signal syscall.Signal) ([]string, map[string]error, error) {
diff --git a/pkg/varlinkapi/containers.go b/pkg/varlinkapi/containers.go
index 872c7bc26..861e3210b 100644
--- a/pkg/varlinkapi/containers.go
+++ b/pkg/varlinkapi/containers.go
@@ -365,6 +365,18 @@ func (i *LibpodAPI) StartContainer(call iopodman.VarlinkCall, name string) error
 	return call.ReplyStartContainer(ctr.ID())
 }
 
+// InitContainer initializes the container given by Varlink.
+func (i *LibpodAPI) InitContainer(call iopodman.VarlinkCall, name string) error {
+	ctr, err := i.Runtime.LookupContainer(name)
+	if err != nil {
+		return call.ReplyContainerNotFound(name, err.Error())
+	}
+	if err := ctr.Init(getContext()); err != nil {
+		return call.ReplyErrorOccurred(err.Error())
+	}
+	return call.ReplyInitContainer(ctr.ID())
+}
+
 // StopContainer ...
 func (i *LibpodAPI) StopContainer(call iopodman.VarlinkCall, name string, timeout int64) error {
 	ctr, err := i.Runtime.LookupContainer(name)