chore: d2vm/run: cleanup unused code, add source reference

Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>

cmd/d2vm/run/README.md

@@ -0,0 +1 @@
+Shamelessly taken from [linuxkit](https://github.com/linuxkit/linuxkit/tree/master/src/cmd/linuxkit)

cmd/d2vm/run/metadata.go

@@ -1,77 +0,0 @@
-package run
-
-import (
-	"fmt"
-	"os"
-	"path/filepath"
-
-	"github.com/rn/iso9660wrap"
-	log "github.com/sirupsen/logrus"
-)
-
-// WriteMetadataISO writes a metadata ISO file in a format usable by pkg/metadata
-func WriteMetadataISO(path string, content []byte) error {
-	outfh, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY, 0644)
-	if err != nil {
-		return err
-	}
-	defer outfh.Close()
-
-	return iso9660wrap.WriteBuffer(outfh, content, "config")
-}
-
-func metadataCreateUsage() {
-	invoked := filepath.Base(os.Args[0])
-	fmt.Printf("USAGE: %s metadata create [file.iso] [metadata]\n\n", invoked)
-
-	fmt.Printf("'file.iso' is the file to create.\n")
-	fmt.Printf("'metadata' will be written to '/config' in the ISO.\n")
-	fmt.Printf("This is compatible with the d2vm/metadata package\n")
-}
-
-func metadataCreate(args []string) {
-	if len(args) != 2 {
-		metadataCreateUsage()
-		os.Exit(1)
-	}
-	switch args[0] {
-	case "help", "-h", "-help", "--help":
-		metadataCreateUsage()
-		os.Exit(0)
-	}
-
-	isoImage := args[0]
-	metadata := args[1]
-
-	if err := WriteMetadataISO(isoImage, []byte(metadata)); err != nil {
-		log.Fatal("Failed to write user data ISO: ", err)
-	}
-}
-
-func metadataUsage() {
-	invoked := filepath.Base(os.Args[0])
-	fmt.Printf("USAGE: %s metadata COMMAND [options]\n\n", invoked)
-	fmt.Printf("Commands:\n")
-	fmt.Printf("  create      Create a metadata ISO\n")
-}
-
-func metadata(args []string) {
-	if len(args) < 1 {
-		metadataUsage()
-		os.Exit(1)
-	}
-	switch args[0] {
-	case "help", "-h", "-help", "--help":
-		metadataUsage()
-		os.Exit(0)
-	}
-
-	switch args[0] {
-	case "create":
-		metadataCreate(args[1:])
-	default:
-		fmt.Printf("%q is not a valid metadata command.\n\n", args[0])
-		metadataUsage()
-		os.Exit(1)
-	}
-}

cmd/d2vm/run/util.go

@@ -17,9 +17,7 @@ package run
 import (
 	"bufio"
 	"fmt"
-	"io/ioutil"
 	"os"
-	"path/filepath"
 	"strconv"
 	"strings"
 )
@@ -276,30 +274,3 @@ func NewPublishedPort(publish string) (PublishedPort, error) {
 	p.Protocol = protocol
 	return p, nil
 }
-
-// CreateMetadataISO writes the provided meta data to an iso file in the given state directory
-func CreateMetadataISO(state, data string, dataPath string) ([]string, error) {
-	var d []byte
-
-	// if we have neither data nor dataPath, nothing to return
-	switch {
-	case data != "" && dataPath != "":
-		return nil, fmt.Errorf("Cannot specify options for both data and dataPath")
-	case data == "" && dataPath == "":
-		return []string{}, nil
-	case data != "":
-		d = []byte(data)
-	case dataPath != "":
-		var err error
-		d, err = ioutil.ReadFile(dataPath)
-		if err != nil {
-			return nil, fmt.Errorf("Cannot read user data from path %s: %v", dataPath, err)
-		}
-	}
-
-	isoPath := filepath.Join(state, "data.iso")
-	if err := WriteMetadataISO(isoPath, d); err != nil {
-		return nil, fmt.Errorf("Cannot write user data ISO: %v", err)
-	}
-	return []string{isoPath}, nil
-}