Merging encode and decode to single minio-demo binary

cmd/minio-demo/encode.go

@@ -0,0 +1,68 @@
+package main
+
+import (
+	"io/ioutil"
+	"log"
+	"os"
+	"strconv"
+	"strings"
+
+	"github.com/codegangsta/cli"
+	"github.com/minio-io/minio/pkgs/erasure"
+)
+
+func encode(c *cli.Context) {
+	// check if minio-encode called without parameters
+	if len(c.Args()) != 1 {
+		cli.ShowCommandHelp(c, "encode")
+		return
+	}
+
+	// get input path
+	inputFilePath := c.Args().Get(0)
+
+	// get output path
+	outputFilePath := inputFilePath
+	if c.String("output") != "" {
+		outputFilePath = c.String("output")
+	}
+
+	protectionLevel := c.String("protection-level")
+	protectionLevelSplit := strings.Split(protectionLevel, ",")
+	if len(protectionLevelSplit) != 2 {
+		log.Fatal("Malformed input for protection-level")
+	}
+
+	k, err := strconv.Atoi(protectionLevelSplit[0])
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	m, err := strconv.Atoi(protectionLevelSplit[1])
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// get file
+	inputFile, err := os.Open(inputFilePath)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// read file
+	input, err := ioutil.ReadAll(inputFile)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// set up encoder
+	erasureParameters, _ := erasure.ParseEncoderParams(k, m, erasure.CAUCHY)
+	// encode data
+	encodedData, length := erasure.Encode(input, erasureParameters)
+
+	// write encoded data out
+	for key, data := range encodedData {
+		ioutil.WriteFile(outputFilePath+"."+strconv.Itoa(key), data, 0600)
+	}
+	ioutil.WriteFile(outputFilePath+".length", []byte(strconv.Itoa(length)), 0600)
+}