Refactor the car platform driver

Various cleanups of the CAR platform driver

1) Consolidate functions in one place
2) Remove the unused hash.go code.  Future hashing will be done outside
   of the platform drivers based on the cds.CodePackage
3) Remove the HTTP transport support.  This makes little sense for .car
   deployment and was a carryover from the golang driver.

Change-Id: I18166525f93c7e52967ec2e31f232649c688aede
Signed-off-by: Greg Haskins <[email protected]>

Author: ghaskins

core/chaincode/platforms/car/hash.go

@@ -17,6 +17,12 @@ limitations under the License.
 package car
 
 import (
+	"archive/tar"
+	"fmt"
+	"io/ioutil"
+	"strings"
+
+	cutil "github.com/hyperledger/fabric/core/container/util"
 	pb "github.com/hyperledger/fabric/protos/peer"
 )
 
@@ -30,3 +36,31 @@ type Platform struct {
 func (carPlatform *Platform) ValidateSpec(spec *pb.ChaincodeSpec) error {
 	return nil
 }
+
+func (carPlatform *Platform) GetDeploymentPayload(spec *pb.ChaincodeSpec) ([]byte, error) {
+
+	return ioutil.ReadFile(spec.ChaincodeID.Path)
+}
+
+func (carPlatform *Platform) GenerateDockerBuild(cds *pb.ChaincodeDeploymentSpec, tw *tar.Writer) (string, error) {
+
+	var buf []string
+	var err error
+
+	spec := cds.ChaincodeSpec
+
+	//let the executable's name be chaincode ID's name
+	buf = append(buf, cutil.GetDockerfileFromConfig("chaincode.car.Dockerfile"))
+	buf = append(buf, "COPY codepackage.car /tmp/codepackage.car")
+	// invoking directly for maximum JRE compatiblity
+	buf = append(buf, fmt.Sprintf("RUN java -jar /usr/local/bin/chaintool buildcar /tmp/codepackage.car -o $GOPATH/bin/%s && rm /tmp/codepackage.car", spec.ChaincodeID.Name))
+
+	dockerFileContents := strings.Join(buf, "\n")
+
+	err = cutil.WriteBytesToPackage("codepackage.car", cds.CodePackage, tw)
+	if err != nil {
+		return "", err
+	}
+
+	return dockerFileContents, nil
+}