refactor: use grignotin

go.mod

@@ -3,6 +3,7 @@ module github.com/ldez/gomoddirectives
 go 1.22.0
 
 require (
+	github.com/ldez/grignotin v0.6.0
 	github.com/stretchr/testify v1.10.0
 	golang.org/x/mod v0.22.0
 	golang.org/x/tools v0.27.0

go.sum

@@ -1,5 +1,7 @@
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/ldez/grignotin v0.6.0 h1:i++3002hxD5TpVto0iLjLrfz1V+yEJ+BBk4glb3aqC8=
+github.com/ldez/grignotin v0.6.0/go.mod h1:uaVTr0SoZ1KBii33c47O1M8Jp3OP3YDwhZCmzT9GHEk=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=

gomoddirectives.go

@@ -6,6 +6,7 @@ import (
 	"go/token"
 	"strings"
 
+	"github.com/ldez/grignotin/gomod"
 	"golang.org/x/mod/modfile"
 	"golang.org/x/tools/go/analysis"
 )
@@ -49,7 +50,7 @@ type Options struct {
 
 // AnalyzePass analyzes a pass.
 func AnalyzePass(pass *analysis.Pass, opts Options) ([]Result, error) {
-	info, err := getModuleInfo()
+	info, err := gomod.GetModuleInfo()
 	if err != nil {
 		return nil, fmt.Errorf("get information about modules: %w", err)
 	}

module.go

@@ -61,38 +61,3 @@ func parseGoMod(goMod string) (*modfile.File, error) {
 
 	return modfile.Parse("go.mod", raw, nil)
 }
-
-func getModuleInfo() ([]modInfo, error) {
-	// https://github.com/golang/go/issues/44753#issuecomment-790089020
-	cmd := exec.Command("go", "list", "-m", "-json")
-
-	out, err := cmd.Output()
-	if err != nil {
-		return nil, fmt.Errorf("command go list: %w: %s", err, string(out))
-	}
-
-	var infos []modInfo
-
-	for dec := json.NewDecoder(bytes.NewBuffer(out)); dec.More(); {
-		var v modInfo
-		if err := dec.Decode(&v); err != nil {
-			return nil, fmt.Errorf("unmarshaling error: %w: %s", err, string(out))
-		}
-
-		if v.GoMod == "" {
-			return nil, errors.New("working directory is not part of a module")
-		}
-
-		if !v.Main || v.Dir == "" {
-			continue
-		}
-
-		infos = append(infos, v)
-	}
-
-	if len(infos) == 0 {
-		return nil, errors.New("go.mod file not found")
-	}
-
-	return infos, nil
-}