start handling stupid Windows

Signed-off-by: Jeff Carr <jcarr@wit.com>

md5sum.go

@@ -0,0 +1,35 @@
+package shell
+
+import "crypto/md5"
+import "encoding/hex"
+import "log"
+import "io"
+import "os"
+
+func hash_file_md5(filePath string) (string, error) {
+	var returnMD5String string
+	file, err := os.Open(filePath)
+	if err != nil {
+		return returnMD5String, err
+	}
+	defer file.Close()
+	hash := md5.New()
+	if _, err := io.Copy(hash, file); err != nil {
+		return returnMD5String, err
+	}
+	hashInBytes := hash.Sum(nil)[:16]
+	returnMD5String = hex.EncodeToString(hashInBytes)
+	return returnMD5String, nil
+
+}
+
+// hash thyself:  hash_file_md5(os.Args[0])
+func Md5sum(filename string) string {
+	hash, err := hash_file_md5(filename)
+	if err == nil {
+		log.Println("shell.Md5sum() hash =", hash)
+		return hash
+	}
+	log.Println("shell.Md5sum() failed")
+	return ""
+}

shell.go

@@ -13,7 +13,9 @@ import "io"
 import "github.com/davecgh/go-spew/spew"
 import "github.com/svent/go-nbreader"
 
+// import "log"
 import log "github.com/sirupsen/logrus"
+// TODO this journalhook to be cross platform
 // import "github.com/wercker/journalhook"
 
 // TODO: look at https://github.com/go-cmd/cmd/issues/20

windowsWrapper.go

@@ -0,0 +1,10 @@
+package shell
+
+import "runtime"
+
+func Execname(filename string) string {
+	if runtime.GOOS == "windows" {
+		return filename + ".exe"
+	}
+	return filename
+}