Cleanup some dryrun details

Adds a launch.json configuration for running/debugging the cli. Also
more correctly silences the usage doc: if inputs are incorrect, it is
helpful to print the doc.

Signed-off-by: Justin Kulikauskas <[email protected]>

Author: JustinKuli

.vscode/launch.json

@@ -94,6 +94,20 @@
                 "MANAGED_CONFIG": "${userHome}/git/governance-policy-framework/kubeconfig_managed",
                 "KUBECONFIG": "${userHome}/git/governance-policy-framework/kubeconfig_managed",
             }
+        },
+        // Set inputs in the args section.
+        {
+            "name": "Launch dryrun (instructions in launch.json)",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "${workspaceFolder}/cmd/dryrun/main.go",
+            "console": "integratedTerminal",
+            "args": [
+                "-p",
+                "${workspaceFolder}/pkg/dryrun/testdata/test_basic_noncompliant/policy.yaml",
+                "${workspaceFolder}/pkg/dryrun/testdata/test_basic_noncompliant/input_1.yaml",
+            ]
         }
     ]
 }

cmd/dryrun/main.go

@@ -3,7 +3,6 @@
 package main
 
 import (
-	"errors"
 	"os"
 
 	"open-cluster-management.io/config-policy-controller/pkg/dryrun"
@@ -12,10 +11,6 @@ import (
 func main() {
 	err := dryrun.Execute()
 	if err != nil {
-		if errors.Is(err, dryrun.ErrNonCompliant) {
-			os.Exit(2)
-		}
-
 		os.Exit(1)
 	}
 }

pkg/dryrun/cmd.go

@@ -89,8 +89,7 @@ func (d *DryRunner) GetCmd() *cobra.Command {
 		RunE: mappings.GenerateMappings,
 	})
 
-	cmd.SetOut(os.Stdout)   // sets default output to stdout, otherwise it is stderr
-	cmd.SilenceUsage = true // otherwise all errors will be followed by the usage doc
+	cmd.SetOut(os.Stdout) // sets default output to stdout, otherwise it is stderr
 
 	return cmd
 }

pkg/dryrun/dryrun.go

@@ -44,6 +44,10 @@ import (
 )
 
 func (d *DryRunner) dryRun(cmd *cobra.Command, args []string) error {
+	// The "usage" output will still be emitted if a required flag is missing,
+	// or if an unknown flag was passed.
+	cmd.SilenceUsage = true
+
 	cfgPolicy, err := d.readPolicy(cmd)
 	if err != nil {
 		return fmt.Errorf("unable to read input policy: %w", err)