Check error return for MarkFlagRequired

cargo/jam/commands/pack.go

@@ -36,8 +36,14 @@ func pack() *cobra.Command {
 	cmd.Flags().BoolVar(&flags.offline, "offline", false, "enable offline caching of dependencies")
 	cmd.Flags().StringVar(&flags.stack, "stack", "", "restricts dependencies to given stack")
 
-	cmd.MarkFlagRequired("buildpack")
-	cmd.MarkFlagRequired("version")
+	err := cmd.MarkFlagRequired("buildpack")
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Unable to mark buildpack flag as required")
+	}
+	err = cmd.MarkFlagRequired("version")
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Unable to mark version flag as required")
+	}
 	return cmd
 }
 

cargo/jam/commands/summarize.go

@@ -24,7 +24,10 @@ func summarize() *cobra.Command {
 	cmd.Flags().StringVar(&flags.buildpackTarballPath, "buildpack", "", "path to a buildpackage tarball (required)")
 	cmd.Flags().StringVar(&flags.format, "format", "markdown", "format of output options are (markdown, json)")
 
-	cmd.MarkFlagRequired("buildpack")
+	err := cmd.MarkFlagRequired("buildpack")
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Unable to mark buildpack flag as required")
+	}
 	return cmd
 }
 

cargo/jam/commands/update_builder.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"github.com/paketo-buildpacks/packit/cargo/jam/internal"
 	"github.com/spf13/cobra"
+	"os"
 )
 
 type updateBuilderFlags struct {
@@ -23,7 +24,10 @@ func updateBuilder() *cobra.Command {
 	cmd.Flags().StringVar(&flags.builderFile, "builder-file", "", "path to the builder.toml file (required)")
 	cmd.Flags().StringVar(&flags.lifecycleURI, "lifecycle-uri", "index.docker.io/buildpacksio/lifecycle", "URI for lifecycle image (optional: default=index.docker.io/buildpacksio/lifecycle)")
 
-	cmd.MarkFlagRequired("builder-file")
+	err := cmd.MarkFlagRequired("builder-file")
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Unable to mark builder-file flag as required")
+	}
 	return cmd
 }
 

cargo/jam/commands/update_buildpack.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"github.com/paketo-buildpacks/packit/cargo/jam/internal"
 	"github.com/spf13/cobra"
+	"os"
 )
 
 type updateBuildpackFlags struct {
@@ -23,8 +24,14 @@ func updateBuildpack() *cobra.Command {
 	cmd.Flags().StringVar(&flags.buildpackFile, "buildpack-file", "", "path to the buildpack.toml file (required)")
 	cmd.Flags().StringVar(&flags.packageFile, "package-file", "", "path to the package.toml file (required)")
 
-	cmd.MarkFlagRequired("buildpack-file")
-	cmd.MarkFlagRequired("package-file")
+	err := cmd.MarkFlagRequired("buildpack-file")
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Unable to mark buildpack-file flag as required")
+	}
+	err = cmd.MarkFlagRequired("package-file")
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Unable to mark package-file flag as required")
+	}
 	return cmd
 }