feat: add go ecosystem support to generate lockfile (Fixes #28)

cmd/go.go

@@ -0,0 +1,94 @@
+/*
+
+Copyright (c) nexB Inc. and others. All rights reserved.
+ScanCode is a trademark of nexB Inc.
+SPDX-License-Identifier: Apache-2.0
+See http://www.apache.org/licenses/LICENSE-2.0 for the license text.
+See https://github.com/aboutcode-org/dependency-inspector for support or download.
+See https://aboutcode.org for more information about nexB OSS projects.
+
+*/
+
+package cmd
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+
+	"github.com/aboutcode-org/dependency-inspector/internal"
+	"github.com/spf13/cobra"
+)
+
+func goCmd() *cobra.Command {
+	forced := false
+
+	goCmd := &cobra.Command{
+		Use:   "go [path]",
+		Short: "Generate lockfile for go project",
+		Long: `Create lockfile (go.list.json) for Go project if it doesn't exist in the specified [path].
+If no path is provided, the command defaults to the current directory.`,
+		Args: cobra.MaximumNArgs(1),
+		Run: func(cmd *cobra.Command, args []string) {
+			path := "."
+			if len(args) > 0 {
+				path = args[0]
+			}
+
+			absPath, err := filepath.Abs(path)
+			if err != nil {
+				fmt.Fprintln(os.Stderr, "Error: Failed to retrieve absolute path: ", err)
+				return
+			}
+
+			outputFileName := "go.list.json"
+			outputPath := filepath.Join(absPath, outputFileName)
+
+			if !forced {
+				if internal.DoesFileExists(outputPath) {
+					return
+				}
+			}
+
+			fmt.Printf("Generating lockfile at '%s' using '[go list -m -json all]'\n", absPath)
+
+			// #nosec G204
+			command := exec.Command("go", "list", "-m", "-json", "all")
+			command.Dir = absPath
+			command.Stderr = os.Stderr
+
+			out, err := command.Output()
+			if err != nil {
+				fmt.Fprintln(os.Stderr, "Error: Failed to execute go list command: ", err)
+				return
+			}
+
+			// Parse NDJSON to valid JSON Array
+			// 'go list -m -json all' outputs objects separated by newline, e.g.:
+			// { ... }
+			// { ... }
+			strOut := strings.TrimSpace(string(out))
+			if strOut == "" {
+				strOut = "[]"
+			} else {
+				// Replace "}\n{" with "},{"
+				strOut = strings.ReplaceAll(strOut, "}\n{", "},{")
+				strOut = "[" + strOut + "]"
+			}
+
+			err = os.WriteFile(outputPath, []byte(strOut), 0644)
+			if err != nil {
+				fmt.Fprintln(os.Stderr, "Error: failed to write output file: ", err)
+				os.Exit(1)
+			}
+
+			fmt.Println("Lock file generated successfully.")
+		},
+	}
+
+	goCmd.Flags().BoolVarP(&forced, "force", "f", false, "Generate lockfile forcibly, ignoring existing lockfiles")
+
+	return goCmd
+}

cmd/root.go

@@ -26,6 +26,7 @@ var ecosystems = []func() *cobra.Command{
 	cocoapodsCmd,
 	pypiCmd,
 	nugetCmd,
+	goCmd,
 }
 
 func rootCmd() *cobra.Command {