Refactor handler packages

To help with packaging, the handlers in pkg/api/handlers are now found
in pkg/api/handler/compat.

Signed-off-by: Jhon Honce <jhonce@redhat.com>

pkg/api/handlers/compat/version.go

@@ -0,0 +1,69 @@
+package compat
+
+import (
+	"fmt"
+	"net/http"
+	goRuntime "runtime"
+	"time"
+
+	"github.com/containers/libpod/libpod"
+	"github.com/containers/libpod/libpod/define"
+	"github.com/containers/libpod/pkg/api/handlers"
+	"github.com/containers/libpod/pkg/api/handlers/utils"
+	docker "github.com/docker/docker/api/types"
+	"github.com/pkg/errors"
+)
+
+func VersionHandler(w http.ResponseWriter, r *http.Request) {
+	// 200 ok
+	// 500 internal
+	runtime := r.Context().Value("runtime").(*libpod.Runtime)
+
+	versionInfo, err := define.GetVersion()
+	if err != nil {
+		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, err)
+		return
+	}
+
+	infoData, err := runtime.Info()
+	if err != nil {
+		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrapf(err, "Failed to obtain system memory info"))
+		return
+	}
+	hostInfo := infoData[0].Data
+
+	components := []docker.ComponentVersion{{
+		Name:    "Podman Engine",
+		Version: versionInfo.Version,
+		Details: map[string]string{
+			"APIVersion":    handlers.DefaultApiVersion,
+			"Arch":          goRuntime.GOARCH,
+			"BuildTime":     time.Unix(versionInfo.Built, 0).Format(time.RFC3339),
+			"Experimental":  "true",
+			"GitCommit":     versionInfo.GitCommit,
+			"GoVersion":     versionInfo.GoVersion,
+			"KernelVersion": hostInfo["kernel"].(string),
+			"MinAPIVersion": handlers.MinimalApiVersion,
+			"Os":            goRuntime.GOOS,
+		},
+	}}
+
+	utils.WriteResponse(w, http.StatusOK, handlers.Version{Version: docker.Version{
+		Platform: struct {
+			Name string
+		}{
+			Name: fmt.Sprintf("%s/%s/%s", goRuntime.GOOS, goRuntime.GOARCH, hostInfo["Distribution"].(map[string]interface{})["distribution"].(string)),
+		},
+		APIVersion:    components[0].Details["APIVersion"],
+		Arch:          components[0].Details["Arch"],
+		BuildTime:     components[0].Details["BuildTime"],
+		Components:    components,
+		Experimental:  true,
+		GitCommit:     components[0].Details["GitCommit"],
+		GoVersion:     components[0].Details["GoVersion"],
+		KernelVersion: components[0].Details["KernelVersion"],
+		MinAPIVersion: components[0].Details["MinAPIVersion"],
+		Os:            components[0].Details["Os"],
+		Version:       components[0].Version,
+	}})
+}