Add suggestion to error message

cmd/truss/main.go

@@ -227,7 +227,7 @@ func parseServiceDefinition(cfg *truss.Config) (deftree.Deftree, *svcdef.Svcdef,
 	// Create the svcdef
 	sd, err := svcdef.New(pbgoFiles, pbFiles)
 	if err != nil {
-		return nil, nil, errors.Wrapf(err, "failed to create service definition")
+		return nil, nil, errors.Wrapf(err, "failed to create service definition; did you pass ALL the protobuf files to truss?")
 	}
 
 	// Create the Deftree

svcdef/consolidate_http_test.go

@@ -84,7 +84,7 @@ service Map {
   }
 }`
 	// From code, build our SvcDef
-	sd, err := New([]io.Reader{strings.NewReader(goCode)}, []io.Reader{strings.NewReader(protoCode)})
+	sd, err := New(map[string]io.Reader{"/tmp/notreal": strings.NewReader(goCode)}, map[string]io.Reader{"/tmp/alsonotreal": strings.NewReader(protoCode)})
 	if err != nil {
 		t.Fatal(err)
 	}

svcdef/svcdef_test.go

@@ -17,7 +17,7 @@ func TestSvcdef(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	sd, err := New([]io.Reader{gf}, []io.Reader{pf})
+	sd, err := New(map[string]io.Reader{"./test-go.txt": gf}, map[string]io.Reader{"./test-proto.txt": pf})
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -46,7 +46,7 @@ type NestedTypeRequest struct {
 	B []*NestedMessageB
 	C EnumType
 }`
-	sd, err := New([]io.Reader{strings.NewReader(caseCode)}, nil)
+	sd, err := New(map[string]io.Reader{"/tmp/notreal": strings.NewReader(caseCode)}, nil)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -109,7 +109,7 @@ type MsgWithMap struct {
 	Beta map[int64]*NestedMessageC
 }
 `
-	sd, err := New([]io.Reader{strings.NewReader(caseCode)}, nil)
+	sd, err := New(map[string]io.Reader{"/tmp/notreal": strings.NewReader(caseCode)}, nil)
 	if err != nil {
 		t.Fatal(err)
 	}