feat: new approach

go.mod

@@ -4,13 +4,12 @@ go 1.22.0
 
 require (
 	github.com/ettle/strcase v0.2.0
-	github.com/golangci/modinfo v0.3.2
-	github.com/hashicorp/go-immutable-radix/v2 v2.0.0
+	github.com/hashicorp/go-immutable-radix/v2 v2.1.0
 	golang.org/x/tools v0.27.0
 )
 
 require (
-	github.com/hashicorp/golang-lru/v2 v2.0.0 // indirect
+	github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
 	golang.org/x/mod v0.22.0 // indirect
 	golang.org/x/sync v0.9.0 // indirect
 )

go.sum

@@ -1,21 +1,13 @@
-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/ettle/strcase v0.2.0 h1:fGNiVF21fHXpX1niBgk0aROov1LagYsOwV/xqKDKR/Q=
 github.com/ettle/strcase v0.2.0/go.mod h1:DajmHElDSaX76ITe3/VHVyMin4LWSJN5Z909Wp+ED1A=
-github.com/golangci/modinfo v0.3.2 h1:vtlDk+LU5eIpeg3Ljf/YawlDsB/RunSWYfv/b93thgs=
-github.com/golangci/modinfo v0.3.2/go.mod h1:AMKyptKcDrNIz9z/KJyED82pJAboTub2Vgt9vwxZhGE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-github.com/hashicorp/go-immutable-radix/v2 v2.0.0 h1:nq9lQ5I71Heg2lRb2/+szuIWKY3Y73d8YKyXyN91WzU=
-github.com/hashicorp/go-immutable-radix/v2 v2.0.0/go.mod h1:hgdqLXA4f6NIjRVisM1TJ9aOJVNRqKZj+xDGF6m7PBw=
+github.com/hashicorp/go-immutable-radix/v2 v2.1.0 h1:CUW5RYIcysz+D3B+l1mDeXrQ7fUvGGCwJfdASSzbrfo=
+github.com/hashicorp/go-immutable-radix/v2 v2.1.0/go.mod h1:hgdqLXA4f6NIjRVisM1TJ9aOJVNRqKZj+xDGF6m7PBw=
 github.com/hashicorp/go-uuid v1.0.3 h1:2gKiV6YVmrJ1i2CKKa9obLvRieoRGviZFL26PcT/Co8=
 github.com/hashicorp/go-uuid v1.0.3/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/bN7x4byOro=
-github.com/hashicorp/golang-lru/v2 v2.0.0 h1:Lf+9eD8m5pncvHAOCQj49GSN6aQI8XGfI5OpXNkoWaA=
-github.com/hashicorp/golang-lru/v2 v2.0.0/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyfM2/ZepoAG6RGpeM=
-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 v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/hashicorp/golang-lru/v2 v2.0.7 h1:a+bsQ5rvGLjzHuww6tVxozPZFVghXaHOwFs4luLUK2k=
+github.com/hashicorp/golang-lru/v2 v2.0.7/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyfM2/ZepoAG6RGpeM=
 golang.org/x/exp v0.0.0-20221215174704-0915cd710c24 h1:6w3iSY8IIkp5OQtbYj8NeuKG1jS9d+kYaubXqsoOiQ8=
 golang.org/x/exp v0.0.0-20221215174704-0915cd710c24/go.mod h1:CxIveKay+FTh1D0yPZemJVgC/95VzuuOLq5Qi4xnoYc=
 golang.org/x/mod v0.22.0 h1:D4nJWe9zXqHOmWqj4VMOJhvzj7bEZg4wEYa759z1pH4=
@@ -24,5 +16,3 @@ golang.org/x/sync v0.9.0 h1:fEo0HyrW1GIgZdpbhCRO0PkJajUS5H9IFUztCgEo2jQ=
 golang.org/x/sync v0.9.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/tools v0.27.0 h1:qEKojBykQkQ4EynWy4S8Weg69NumxKdn40Fce3uc/8o=
 golang.org/x/tools v0.27.0/go.mod h1:sUi0ZgbwW9ZPAq26Ekut+weQPR5eIM6GQLQ1Yjm1H0Q=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

tagliatelle.go

@@ -12,7 +12,6 @@ import (
 	"strings"
 
 	"github.com/ettle/strcase"
-	"github.com/golangci/modinfo"
 	iradix "github.com/hashicorp/go-immutable-radix/v2"
 	"golang.org/x/tools/go/analysis"
 	"golang.org/x/tools/go/analysis/passes/inspect"
@@ -53,17 +52,11 @@ func New(config Config) *analysis.Analyzer {
 		},
 		Requires: []*analysis.Analyzer{
 			inspect.Analyzer,
-			modinfo.Analyzer,
 		},
 	}
 }
 
 func run(pass *analysis.Pass, config Config) (interface{}, error) {
-	info, err := modinfo.FindModuleFromPass(pass)
-	if err != nil {
-		return nil, err
-	}
-
 	isp, ok := pass.ResultOf[inspect.Analyzer].(*inspector.Inspector)
 	if !ok {
 		return nil, errors.New("missing inspect analyser")
@@ -73,7 +66,7 @@ func run(pass *analysis.Pass, config Config) (interface{}, error) {
 		(*ast.StructType)(nil),
 	}
 
-	r := createRadixTree(config, info)
+	r := createRadixTree(config, pass.Module.Path)
 
 	isp.Preorder(nodeFilter, func(n ast.Node) {
 		node, ok := n.(*ast.StructType)
@@ -259,7 +252,7 @@ func toHeader(s string) string {
 	return strcase.ToCase(s, strcase.TitleCase, '-')
 }
 
-func createRadixTree(config Config, info modinfo.ModInfo) *iradix.Tree[Base] {
+func createRadixTree(config Config, modPath string) *iradix.Tree[Base] {
 	r := iradix.New[Base]()
 
 	defaultRule := Base{
@@ -284,7 +277,7 @@ func createRadixTree(config Config, info modinfo.ModInfo) *iradix.Tree[Base] {
 			c.Rules[k] = v
 		}
 
-		r, _, _ = r.Insert([]byte(path.Join(info.Path, override.Package)), c)
+		r, _, _ = r.Insert([]byte(path.Join(modPath, override.Package)), c)
 	}
 
 	return r

tagliatelle_test.go

@@ -22,8 +22,8 @@ func TestAnalyzer(t *testing.T) {
 	}{
 		{
 			desc:     "simple",
-			dir:      "example.com/one",
-			patterns: []string{"example.com/one"},
+			dir:      "one",
+			patterns: []string{"example.com/fake/one"},
 			cfg: tagliatelle.Config{
 				Base: tagliatelle.Base{
 					Rules: map[string]string{
@@ -43,8 +43,8 @@ func TestAnalyzer(t *testing.T) {
 		},
 		{
 			desc:     "with non-applicable overrides",
-			dir:      "example.com/one",
-			patterns: []string{"example.com/one/..."},
+			dir:      "one",
+			patterns: []string{"example.com/fake/one/..."},
 			cfg: tagliatelle.Config{
 				Base: tagliatelle.Base{
 					Rules: map[string]string{
@@ -76,8 +76,8 @@ func TestAnalyzer(t *testing.T) {
 		},
 		{
 			desc:     "with applicable overrides",
-			dir:      "example.com/two",
-			patterns: []string{"example.com/two/..."},
+			dir:      "two",
+			patterns: []string{"example.com/fake/two/..."},
 			cfg: tagliatelle.Config{
 				Base: tagliatelle.Base{
 					Rules: map[string]string{
@@ -109,8 +109,8 @@ func TestAnalyzer(t *testing.T) {
 		},
 		{
 			desc:     "ignore",
-			dir:      "example.com/three",
-			patterns: []string{"example.com/three/..."},
+			dir:      "three",
+			patterns: []string{"example.com/fake/three/..."},
 			cfg: tagliatelle.Config{
 				Base: tagliatelle.Base{
 					Rules: map[string]string{
@@ -138,6 +138,8 @@ func TestAnalyzer(t *testing.T) {
 		},
 	}
 
+	os.Setenv("GOPROXY", "off")
+
 	for _, test := range testCases {
 		t.Run(test.desc, func(t *testing.T) {
 			runWithSuggestedFixes(t, tagliatelle.New(test.cfg), test.dir, test.patterns...)
@@ -155,12 +157,16 @@ func runWithSuggestedFixes(t *testing.T, a *analysis.Analyzer, dir string, patte
 
 	defer func() { _ = os.Chdir(wd) }()
 
-	testdata := analysistest.TestData()
+	tempDir := t.TempDir()
+
+	// Needs to be run outside testdata.
+	err = os.CopyFS(tempDir, os.DirFS(filepath.Join(analysistest.TestData(), "src", "example.com")))
 
 	// NOTE: analysistest does not yet support modules;
 	// see https://github.com/golang/go/issues/37054 for details.
 
-	err = os.Chdir(filepath.Join(testdata, "src", filepath.FromSlash(dir)))
+	srcPath := filepath.Join(tempDir, filepath.FromSlash(dir))
+	err = os.Chdir(srcPath)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -171,5 +177,5 @@ func runWithSuggestedFixes(t *testing.T, a *analysis.Analyzer, dir string, patte
 		t.Fatal(err)
 	}
 
-	return analysistest.RunWithSuggestedFixes(t, testdata, a, patterns...)
+	return analysistest.Run(t, srcPath, a, patterns...)
 }

testdata/src/example.com/one/go.mod

@@ -1,3 +1,3 @@
-module example.com/one
+module example.com/fake/one
 
-go 1.19
+go 1.22.0

testdata/src/example.com/three/go.mod

@@ -1,3 +1,3 @@
-module example.com/three
+module example.com/fake/three
 
-go 1.19
+go 1.22.0

testdata/src/example.com/two/go.mod

@@ -1,3 +1,3 @@
-module example.com/two
+module example.com/fake/two
 
-go 1.19
+go 1.22.0