Remove ulele/deepcopier in favor of JSON deep copy

We have a very high performance JSON library that doesn't need to
perform code generation. Let's use it instead of our questionably
performant, reflection-dependent deep copy library.

Most changes because some functions can now return errors.

Also converts cmd/podman to use jsoniter, instead of pkg/json,
for increased performance.

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

4 files changed, 24 insertions, 9 deletions

diff --git a/pkg/adapter/pods_remote.go b/pkg/adapter/pods_remote.go
index ef8de90a6..4a32607a2 100644
--- a/pkg/adapter/pods_remote.go
+++ b/pkg/adapter/pods_remote.go
@@ -14,7 +14,6 @@ import (
 	"github.com/containers/libpod/libpod"
 	"github.com/containers/libpod/pkg/varlinkapi"
 	"github.com/pkg/errors"
-	"github.com/ulule/deepcopier"
 )
 
 // Pod ...
@@ -99,7 +98,9 @@ func (r *LocalRuntime) LookupPod(nameOrID string) (*Pod, error) {
 // the data of a remotepod data struct
 func (p *Pod) Inspect() (*libpod.PodInspect, error) {
 	config := new(libpod.PodConfig)
-	deepcopier.Copy(p.remotepod.config).To(config)
+	if err := libpod.JSONDeepCopy(p.remotepod.config, config); err != nil {
+		return nil, err
+	}
 	inspectData := libpod.PodInspect{
 		Config:     config,
 		State:      p.remotepod.state,
diff --git a/pkg/spec/createconfig.go b/pkg/spec/createconfig.go
index 79a318771..07ae633d1 100644
--- a/pkg/spec/createconfig.go
+++ b/pkg/spec/createconfig.go
@@ -346,8 +346,11 @@ func (c *CreateConfig) GetTmpfsMounts() []spec.Mount {
 	return m
 }
 
-func (c *CreateConfig) createExitCommand() []string {
-	config := c.Runtime.GetConfig()
+func (c *CreateConfig) createExitCommand() ([]string, error) {
+	config, err := c.Runtime.GetConfig()
+	if err != nil {
+		return nil, err
+	}
 
 	cmd, _ := os.Executable()
 	command := []string{cmd,
@@ -372,7 +375,7 @@ func (c *CreateConfig) createExitCommand() []string {
 		command = append(command, "--rm")
 	}
 
-	return command
+	return command, nil
 }
 
 // GetContainerCreateOptions takes a CreateConfig and returns a slice of CtrCreateOptions
@@ -567,7 +570,11 @@ func (c *CreateConfig) GetContainerCreateOptions(runtime *libpod.Runtime, pod *l
 	}
 
 	// Always use a cleanup process to clean up Podman after termination
-	options = append(options, libpod.WithExitCommand(c.createExitCommand()))
+	exitCmd, err := c.createExitCommand()
+	if err != nil {
+		return nil, err
+	}
+	options = append(options, libpod.WithExitCommand(exitCmd))
 
 	if c.HealthCheck != nil {
 		options = append(options, libpod.WithHealthCheck(c.HealthCheck))
diff --git a/pkg/varlinkapi/containers_create.go b/pkg/varlinkapi/containers_create.go
index 6b53b22c6..8990ac001 100644
--- a/pkg/varlinkapi/containers_create.go
+++ b/pkg/varlinkapi/containers_create.go
@@ -22,7 +22,10 @@ import (
 
 // CreateContainer ...
 func (i *LibpodAPI) CreateContainer(call iopodman.VarlinkCall, config iopodman.Create) error {
-	rtc := i.Runtime.GetConfig()
+	rtc, err := i.Runtime.GetConfig()
+	if err != nil {
+		return call.ReplyErrorOccurred(err.Error())
+	}
 	ctx := getContext()
 
 	newImage, err := i.Runtime.ImageRuntime().New(ctx, config.Image, rtc.SignaturePolicyPath, "", os.Stderr, nil, image.SigningOptions{}, false, nil)
diff --git a/pkg/varlinkapi/images.go b/pkg/varlinkapi/images.go
index 210f139ce..23ea24a7a 100644
--- a/pkg/varlinkapi/images.go
+++ b/pkg/varlinkapi/images.go
@@ -514,7 +514,11 @@ func (i *LibpodAPI) Commit(call iopodman.VarlinkCall, name, imageName string, ch
 	if err != nil {
 		return call.ReplyContainerNotFound(name, err.Error())
 	}
-	sc := image.GetSystemContext(i.Runtime.GetConfig().SignaturePolicyPath, "", false)
+	rtc, err := i.Runtime.GetConfig()
+	if err != nil {
+		return call.ReplyErrorOccurred(err.Error())
+	}
+	sc := image.GetSystemContext(rtc.SignaturePolicyPath, "", false)
 	var mimeType string
 	switch manifestType {
 	case "oci", "": //nolint
@@ -525,7 +529,7 @@ func (i *LibpodAPI) Commit(call iopodman.VarlinkCall, name, imageName string, ch
 		return call.ReplyErrorOccurred(fmt.Sprintf("unrecognized image format %q", manifestType))
 	}
 	coptions := buildah.CommitOptions{
-		SignaturePolicyPath:   i.Runtime.GetConfig().SignaturePolicyPath,
+		SignaturePolicyPath:   rtc.SignaturePolicyPath,
 		ReportWriter:          nil,
 		SystemContext:         sc,
 		PreferredManifestType: mimeType,