package-type-check: add empty package check

Add new check to check if a package is empty.

We have similar pipelines copied into the melange repos.

Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero@chainguard.dev>

Author: aborrero

package-type-check/main.go

@@ -13,7 +13,7 @@ func main() {
 	var rootCmd = &cobra.Command{
 		Use:   "package-type-check",
 		Short: "A tool to check and verify the type of package in Wolfi",
-		Long:  `This tool is used in wolfi melange test configuration to verify the kind of packages: : docs, meta, static, virtual, and by-product packages.`,
+		Long:  `This tool is used in wolfi melange test configuration to verify the kind of packages: : docs, meta, static, virtual, empty, and by-product packages.`,
 		Run: func(cmd *cobra.Command, args []string) {
 			// Default help message if no command is provided
 			cmd.Help()
@@ -22,14 +22,14 @@ func main() {
 	}
 
 	// Add all subcommands
-	// TODO: Add other commands for static, byproduct
 	rootCmd.AddCommand(CheckDocsCommand())
 	rootCmd.AddCommand(CheckMetaCommand())
 	rootCmd.AddCommand(CheckVirtualCommand())
 	rootCmd.AddCommand(CheckStaticCommand())
 	rootCmd.AddCommand(CheckByProductCommand())
 	rootCmd.AddCommand(CheckDevCommand())
 	rootCmd.AddCommand(CheckDebugCommand())
+	rootCmd.AddCommand(CheckEmptyCommand())
 
 	if err := rootCmd.Execute(); err != nil {
 		fmt.Println(err)
@@ -129,3 +129,14 @@ func CheckDebugCommand() *cobra.Command {
 		},
 	}
 }
+
+func CheckEmptyCommand() *cobra.Command {
+	return &cobra.Command{
+		Use:   "empty <PACKAGE>",
+		Short: "Check and verify the package is an empty package",
+		Args:  cobra.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return checkers.CheckEmptyPackage(args[0])
+		},
+	}
+}

package-type-check/pkg/checkers/empty.go

@@ -0,0 +1,30 @@
+package checkers
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/chainguard-dev/cg-tw/package-type-check/pkg/utils"
+)
+
+func CheckEmptyPackage(pkg string) error {
+	fmt.Printf("Checking if package %s is an empty package\n", pkg)
+
+	empty, err := utils.IsEmptyPackage(pkg)
+	if err != nil {
+		return err
+	}
+
+	if !empty {
+		files, err := utils.GetPackageFiles(pkg)
+		if err != nil {
+			return err
+		}
+		fileList := strings.Join(files, "\n  ")
+		return fmt.Errorf("FAIL: Package [%s] is not empty: %s", pkg, fileList)
+	}
+
+	fmt.Printf("PASS: Package [%s] is empty", pkg)
+
+    return nil
+}

pipelines/test/tw/emptypackage.yaml

@@ -0,0 +1,10 @@
+name: Empty Package Check
+
+needs:
+  packages:
+    - package-type-check
+
+pipeline:
+  - name: Check if the package is an Empty Package
+    runs: |
+      package-type-check empty "${{context.name}}"