fix golint issues, else blocks (#457)

tools/goctl/util/ctx/context.go

@@ -7,21 +7,19 @@ import (
 	"github.com/tal-tech/go-zero/tools/goctl/rpc/execx"
 )
 
-var moduleCheckErr = errors.New("the work directory must be found in the go mod or the $GOPATH")
+var errModuleCheck = errors.New("the work directory must be found in the go mod or the $GOPATH")
 
-type (
-	ProjectContext struct {
-		WorkDir string
-		// Name is the root name of the project
-		// eg: go-zero、greet
-		Name string
-		// Path identifies which module a project belongs to, which is module value if it's a go mod project,
-		// or else it is the root name of the project, eg: github.com/tal-tech/go-zero、greet
-		Path string
-		// Dir is the path of the project, eg: /Users/keson/goland/go/go-zero、/Users/keson/go/src/greet
-		Dir string
-	}
-)
+type ProjectContext struct {
+	WorkDir string
+	// Name is the root name of the project
+	// eg: go-zero、greet
+	Name string
+	// Path identifies which module a project belongs to, which is module value if it's a go mod project,
+	// or else it is the root name of the project, eg: github.com/tal-tech/go-zero、greet
+	Path string
+	// Dir is the path of the project, eg: /Users/keson/goland/go/go-zero、/Users/keson/go/src/greet
+	Dir string
+}
 
 // Prepare checks the project which module belongs to,and returns the path and module.
 // workDir parameter is the directory of the source of generating code,

tools/goctl/util/ctx/gopath.go

@@ -25,7 +25,7 @@ func projectFromGoPath(workDir string) (*ProjectContext, error) {
 	goPath := buildContext.GOPATH
 	goSrc := filepath.Join(goPath, "src")
 	if !util.FileExists(goSrc) {
-		return nil, moduleCheckErr
+		return nil, errModuleCheck
 	}
 
 	wd, err := filepath.Abs(workDir)
@@ -34,7 +34,7 @@ func projectFromGoPath(workDir string) (*ProjectContext, error) {
 	}
 
 	if !strings.HasPrefix(wd, goSrc) {
-		return nil, moduleCheckErr
+		return nil, errModuleCheck
 	}
 
 	projectName := strings.TrimPrefix(wd, goSrc+string(filepath.Separator))