Convert install script to go

Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au>

init/sysinit.go

@@ -1,6 +1,7 @@
 package init
 
 import (
+	"fmt"
 	"os"
 	"path"
 	"syscall"
@@ -13,6 +14,7 @@ import (
 	"github.com/rancher/os/config"
 	"github.com/rancher/os/docker"
 	"github.com/rancher/os/log"
+	"github.com/rancher/os/util"
 )
 
 const (
@@ -96,11 +98,37 @@ func loadImages(cfg *config.CloudConfig) (*config.CloudConfig, error) {
 func SysInit() error {
 	cfg := config.LoadConfig()
 
+	f, err := os.Create("/log")
+	if err != nil {
+		log.Errorf("Failed to make /log file %s", err)
+	}
+	defer f.Close()
+	log.Infof("----------------------------------SVEN--------------------------------------------------")
+	if isInitrd() {
+		log.Infof("-----trying /dev/sr0-------------")
+		// loading from ramdisk/iso, so mount /dev/cdrom (or whatever it is) and see if theres a rancheros dir
+		err := util.Mount("/dev/sr0", "/mnt", "iso9660", "-r")
+		if err != nil {
+			fmt.Fprintf(f, "Failed to mount /dev/sr0: %s", err)
+			log.Debugf("Failed to mount /dev/sr0: %s", err)
+		} else {
+			if err := control.PreloadImages(docker.NewSystemClient, "/mnt/rancheros"); err != nil {
+				fmt.Fprintf(f, "Failed to preload ISO System Docker images: %v", err)
+				log.Errorf("Failed to preload ISO System Docker images: %v", err)
+			} else {
+				fmt.Fprintf(f, "preloaded ISO images")
+				log.Infof("preloaded ISO images")
+			}
+		}
+	}
+	log.Infof("----------------------------------NEVS--------------------------------------------------")
+	f.Sync()
+
 	if err := control.PreloadImages(docker.NewSystemClient, systemImagesPreloadDirectory); err != nil {
 		log.Errorf("Failed to preload System Docker images: %v", err)
 	}
 
-	_, err := config.ChainCfgFuncs(cfg,
+	_, err = config.ChainCfgFuncs(cfg,
 		loadImages,
 		func(cfg *config.CloudConfig) (*config.CloudConfig, error) {
 			p, err := compose.GetProject(cfg, false, true)