scripts: add --go-ldflags argument to operator-sdk build command

CHANGELOG.md

@@ -10,6 +10,7 @@
 - Scaffold a `pkg/apis/<group>/group.go` package file to avoid `go/build` errors when running Kubernetes code generators. ([#1401](https://github.com/operator-framework/operator-sdk/pull/1401))
 - Adds a new extra variable containing the unmodified CR spec for ansible based operators. [#1563](https://github.com/operator-framework/operator-sdk/pull/1563)
 - New flag `--repo` for subcommands [`new`](https://github.com/operator-framework/operator-sdk/blob/master/doc/sdk-cli-reference.md#new) and [`migrate`](https://github.com/operator-framework/operator-sdk/blob/master/doc/sdk-cli-reference.md#migrate) specifies the repository path to be used in Go source files generated by the SDK. This flag can only be used with [Go modules](https://github.com/golang/go/wiki/Modules). ([#1475](https://github.com/operator-framework/operator-sdk/pull/1475))
+- Adds `--go-build-args` flag to `operator-sdk build` for providing additional Go build arguments. ([#1582](https://github.com/operator-framework/operator-sdk/pull/1582))
 
 ### Changed
 

cmd/operator-sdk/build/cmd.go

@@ -32,6 +32,7 @@ import (
 var (
 	imageBuildArgs string
 	imageBuilder   string
+	goBuildArgs    string
 )
 
 func NewCmd() *cobra.Command {
@@ -54,6 +55,7 @@ For example:
 	}
 	buildCmd.Flags().StringVar(&imageBuildArgs, "image-build-args", "", "Extra image build arguments as one string such as \"--build-arg https_proxy=$https_proxy\"")
 	buildCmd.Flags().StringVar(&imageBuilder, "image-builder", "docker", "Tool to build OCI images. One of: [docker, podman, buildah]")
+	buildCmd.Flags().StringVar(&goBuildArgs, "go-build-args", "", "Extra Go build arguments as one string such as \"-ldflags -X=main.xyz=abc\"")
 	return buildCmd
 }
 
@@ -99,10 +101,17 @@ func buildFunc(cmd *cobra.Command, args []string) error {
 	// Don't need to build Go code if a non-Go Operator.
 	if projutil.IsOperatorGo() {
 		trimPath := fmt.Sprintf("all=-trimpath=%s", filepath.Dir(absProjectPath))
+		args := []string{"-gcflags", trimPath, "-asmflags", trimPath}
+
+		if goBuildArgs != "" {
+			splitArgs := strings.Fields(goBuildArgs)
+			args = append(args, splitArgs...)
+		}
+
 		opts := projutil.GoCmdOptions{
 			BinName:     filepath.Join(absProjectPath, scaffold.BuildBinDir, projectName),
 			PackagePath: path.Join(projutil.GetGoPkg(), filepath.ToSlash(scaffold.ManagerDir)),
-			Args:        []string{"-gcflags", trimPath, "-asmflags", trimPath},
+			Args:        args,
 			Env:         goBuildEnv,
 			GoMod:       projutil.IsDepManagerGoMod(),
 		}

doc/sdk-cli-reference.md

@@ -19,6 +19,7 @@ Usage:
 
 * `--image-build-args` string - extra, optional image build arguments as one string such as `"--build-arg https_proxy=$https_proxy"` (default "")
 * `--image-builder` string - tool to build OCI images. One of: `[docker, podman, buildah]` (default "docker")
+* `--go-build-args` string - extra Go build arguments as one string such as `"-ldflags -X=main.xyz=abc"`
 * `-h, --help` - help for build
 
 ### Use