Go: Add methods to GoModule for the tidy and vendor commands

These ensure that the module path is used automatically

go/extractor/cli/go-autobuilder/go-autobuilder.go

@@ -168,7 +168,7 @@ func tryUpdateGoModAndGoSum(workspace project.GoWorkspace) {
 			beforeGoSumFileInfo, beforeGoSumErr := os.Stat(goSumPath)
 
 			// run `go mod tidy -e`
-			cmd := toolchain.TidyModule(goModDir)
+			cmd := goMod.Tidy()
 			res := util.RunCmd(cmd)
 
 			if !res {
@@ -428,7 +428,7 @@ func installDependencies(workspace project.GoWorkspace) {
 			path := filepath.Dir(module.Path)
 
 			if util.DirExists(filepath.Join(path, "vendor")) {
-				vendor := toolchain.VendorModule(path)
+				vendor := module.Vendor()
 				log.Printf("Synchronizing vendor file using `go mod vendor` in %s.\n", path)
 				util.RunCmd(vendor)
 			}

go/extractor/project/project.go

@@ -3,6 +3,7 @@ package project
 import (
 	"log"
 	"os"
+	"os/exec"
 	"path/filepath"
 	"regexp"
 	"slices"
@@ -48,6 +49,16 @@ func (module *GoModule) RequiredGoVersion() util.SemVer {
 	}
 }
 
+// Runs `go mod tidy` for this module.
+func (module *GoModule) Tidy() *exec.Cmd {
+	return toolchain.TidyModule(filepath.Dir(module.Path))
+}
+
+// Runs `go mod vendor -e` for this module.
+func (module *GoModule) Vendor() *exec.Cmd {
+	return toolchain.VendorModule(filepath.Dir(module.Path))
+}
+
 // Represents information about a Go project workspace: this may either be a folder containing
 // a `go.work` file or a collection of `go.mod` files.
 type GoWorkspace struct {