[FAB-4590] Auto-vendor all deps properly

It was noted that the auto-vendoring mechanism introduced
in CR 6991 was failing to vendor dependencies properly.

Investigating, it was root-caused that we were only auto-
vendoring transitive dependencies, not direct imports.

This patch corrects this by merging the direct imports
into our dependency tree.  Fix was verified by adding
the unit-test, verifying that it fails, and subsequently
verifying that it passes after the fix was applied.

Credit to Rahul Hegde <rhegde@cls-bank.com> for finding the
issue and proposing the proper fix that inspired this patch.

Fixes FAB-4590

Change-Id: Ie0631ac1033c3f427ea42c43eccf76a0f7390320
Signed-off-by: Greg Haskins <gregory.haskins@gmail.com>

core/chaincode/platforms/golang/platform.go

@@ -239,18 +239,29 @@ func (goPlatform *Platform) GetDeploymentPayload(spec *pb.ChaincodeSpec) ([]byte
 	})
 
 	// --------------------------------------------------------------------------------------
-	// Assemble the fully resolved list of transitive dependencies from the imports that remain
+	// Assemble the fully resolved list of direct and transitive dependencies based on the
+	// imports that remain after filtering
 	// --------------------------------------------------------------------------------------
 	deps := make(map[string]bool)
 
 	for _, pkg := range imports {
-		_deps, err := listDeps(env, pkg)
+		// ------------------------------------------------------------------------------
+		// Resolve direct import's transitives
+		// ------------------------------------------------------------------------------
+		transitives, err := listDeps(env, pkg)
 		if err != nil {
 			return nil, fmt.Errorf("Error obtaining dependencies for %s: %s", pkg, err)
 		}
 
-		// Merge with our top list
-		for _, dep := range _deps {
+		// ------------------------------------------------------------------------------
+		// Merge all results with our top list
+		// ------------------------------------------------------------------------------
+
+		// Merge direct dependency...
+		deps[pkg] = true
+
+		// .. and then all transitives
+		for _, dep := range transitives {
 			deps[dep] = true
 		}
 	}

core/chaincode/platforms/golang/platform_test.go

@@ -260,6 +260,7 @@ func TestGenerateDockerBuild(t *testing.T) {
 	specs = append(specs, spec{CCName: "NoCode", Path: "path/to/nowhere", File: "/bin/warez", Mode: 0100400, SuccessExpected: false})
 	specs = append(specs, spec{CCName: "invalidhttp", Path: "https://not/a/valid/path", File: "/src/github.com/hyperledger/fabric/examples/chaincode/go/map/map.go", Mode: 0100400, SuccessExpected: false, RealGen: true})
 	specs = append(specs, spec{CCName: "map", Path: "github.com/hyperledger/fabric/examples/chaincode/go/map", File: "/src/github.com/hyperledger/fabric/examples/chaincode/go/map/map.go", Mode: 0100400, SuccessExpected: true, RealGen: true})
+	specs = append(specs, spec{CCName: "AutoVendor", Path: "github.com/hyperledger/fabric/test/chaincodes/AutoVendor/chaincode", File: "/src/github.com/hyperledger/fabric/test/chaincodes/AutoVendor/chaincode/main.go", Mode: 0100400, SuccessExpected: true, RealGen: true})
 	specs = append(specs, spec{CCName: "mapBadPath", Path: "github.com/hyperledger/fabric/examples/chaincode/go/map", File: "/src/github.com/hyperledger/fabric/examples/bad/path/to/map.go", Mode: 0100400, SuccessExpected: false})
 	specs = append(specs, spec{CCName: "mapBadMode", Path: "github.com/hyperledger/fabric/examples/chaincode/go/map", File: "/src/github.com/hyperledger/fabric/examples/chaincode/go/map/map.go", Mode: 0100555, SuccessExpected: false})
 

test/chaincodes/AutoVendor/chaincode/main.go

@@ -0,0 +1,43 @@
+/*
+ * Copyright Greg Haskins All Rights Reserved
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The purpose of this test code is to prove that the system properly packages
+ * up dependencies.  We therefore synthesize the scenario where a chaincode
+ * imports non-standard dependencies both directly and indirectly and then
+ * expect a unit-test to verify that the package includes everything needed
+ * and ultimately builds properly.
+ *
+ */
+
+package main
+
+import (
+	"fmt"
+
+	"github.com/hyperledger/fabric/core/chaincode/shim"
+	pb "github.com/hyperledger/fabric/protos/peer"
+	"github.com/hyperledger/fabric/test/chaincodes/AutoVendor/directdep"
+)
+
+// SimpleChaincode example simple Chaincode implementation
+type SimpleChaincode struct {
+}
+
+func (t *SimpleChaincode) Init(stub shim.ChaincodeStubInterface) pb.Response {
+	return shim.Error("NOT IMPL")
+}
+
+func (t *SimpleChaincode) Invoke(stub shim.ChaincodeStubInterface) pb.Response {
+	return shim.Error("NOT IMPL")
+}
+
+func main() {
+	directdep.PointlessFunction()
+
+	err := shim.Start(new(SimpleChaincode))
+	if err != nil {
+		fmt.Printf("Error starting Simple chaincode: %s", err)
+	}
+}

test/chaincodes/AutoVendor/directdep/core.go

@@ -0,0 +1,17 @@
+/*
+ * Copyright Greg Haskins All Rights Reserved
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * See github.com/hyperledger/fabric/test/chaincodes/AutoVendor/chaincode/main.go for details
+ */
+package directdep
+
+import (
+	"github.com/hyperledger/fabric/test/chaincodes/AutoVendor/indirectdep"
+)
+
+func PointlessFunction() {
+	// delegate to our indirect dependency
+	indirectdep.PointlessFunction()
+}

test/chaincodes/AutoVendor/indirectdep/core.go

@@ -0,0 +1,14 @@
+/*
+ * Copyright Greg Haskins All Rights Reserved
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * See github.com/hyperledger/fabric/test/chaincodes/AutoVendor/chaincode/main.go for details
+ */
+package indirectdep
+
+import "fmt"
+
+func PointlessFunction() {
+	fmt.Printf("Successfully invoked pointless function\n")
+}