From c7d7f10bdff703e4a3c0414e8a33d4e45c91eb35 Mon Sep 17 00:00:00 2001 From: Dmitry Vyukov Date: Sat, 4 Jul 2020 11:12:55 +0200 Subject: go.mod: vendor golangci-lint --- .../golangci/check/cmd/structcheck/structcheck.go | 193 +++++++++++++++++++++ 1 file changed, 193 insertions(+) create mode 100644 vendor/github.com/golangci/check/cmd/structcheck/structcheck.go (limited to 'vendor/github.com/golangci/check/cmd/structcheck') diff --git a/vendor/github.com/golangci/check/cmd/structcheck/structcheck.go b/vendor/github.com/golangci/check/cmd/structcheck/structcheck.go new file mode 100644 index 000000000..5dc5f8380 --- /dev/null +++ b/vendor/github.com/golangci/check/cmd/structcheck/structcheck.go @@ -0,0 +1,193 @@ +// structcheck +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program. If not, see . + +package structcheck + +import ( + "flag" + "fmt" + "go/ast" + "go/token" + "go/types" + + "golang.org/x/tools/go/loader" +) + +var ( + assignmentsOnly = flag.Bool("structcheck.a", false, "Count assignments only") + loadTestFiles = flag.Bool("structcheck.t", false, "Load test files too") + buildTags = flag.String("structcheck.tags", "", "Build tags") +) + +type visitor struct { + prog *loader.Program + pkg *loader.PackageInfo + m map[types.Type]map[string]int + skip map[types.Type]struct{} +} + +func (v *visitor) decl(t types.Type, fieldName string) { + if _, ok := v.m[t]; !ok { + v.m[t] = make(map[string]int) + } + if _, ok := v.m[t][fieldName]; !ok { + v.m[t][fieldName] = 0 + } +} + +func (v *visitor) assignment(t types.Type, fieldName string) { + if _, ok := v.m[t]; !ok { + v.m[t] = make(map[string]int) + } + if _, ok := v.m[t][fieldName]; ok { + v.m[t][fieldName]++ + } else { + v.m[t][fieldName] = 1 + } +} + +func (v *visitor) typeSpec(node *ast.TypeSpec) { + if strukt, ok := node.Type.(*ast.StructType); ok { + t := v.pkg.Info.Defs[node.Name].Type() + for _, f := range strukt.Fields.List { + if len(f.Names) > 0 { + fieldName := f.Names[0].Name + v.decl(t, fieldName) + } + } + } +} + +func (v *visitor) typeAndFieldName(expr *ast.SelectorExpr) (types.Type, string, bool) { + selection := v.pkg.Info.Selections[expr] + if selection == nil { + return nil, "", false + } + recv := selection.Recv() + if ptr, ok := recv.(*types.Pointer); ok { + recv = ptr.Elem() + } + return recv, selection.Obj().Name(), true +} + +func (v *visitor) assignStmt(node *ast.AssignStmt) { + for _, lhs := range node.Lhs { + var selector *ast.SelectorExpr + switch expr := lhs.(type) { + case *ast.SelectorExpr: + selector = expr + case *ast.IndexExpr: + if expr, ok := expr.X.(*ast.SelectorExpr); ok { + selector = expr + } + } + if selector != nil { + if t, fn, ok := v.typeAndFieldName(selector); ok { + v.assignment(t, fn) + } + } + } +} + +func (v *visitor) compositeLiteral(node *ast.CompositeLit) { + t := v.pkg.Info.Types[node.Type].Type + for _, expr := range node.Elts { + if kv, ok := expr.(*ast.KeyValueExpr); ok { + if ident, ok := kv.Key.(*ast.Ident); ok { + v.assignment(t, ident.Name) + } + } else { + // Struct literal with positional values. + // All the fields are assigned. + v.skip[t] = struct{}{} + break + } + } +} + +func (v *visitor) Visit(node ast.Node) ast.Visitor { + switch node := node.(type) { + case *ast.TypeSpec: + v.typeSpec(node) + + case *ast.AssignStmt: + if *assignmentsOnly { + v.assignStmt(node) + } + + case *ast.SelectorExpr: + if !*assignmentsOnly { + if t, fn, ok := v.typeAndFieldName(node); ok { + v.assignment(t, fn) + } + } + + case *ast.CompositeLit: + v.compositeLiteral(node) + } + + return v +} + +type Issue struct { + Pos token.Position + Type string + FieldName string +} + +func Run(program *loader.Program, reportExported bool) []Issue { + var issues []Issue + for _, pkg := range program.InitialPackages() { + visitor := &visitor{ + m: make(map[types.Type]map[string]int), + skip: make(map[types.Type]struct{}), + prog: program, + pkg: pkg, + } + for _, f := range pkg.Files { + ast.Walk(visitor, f) + } + + for t := range visitor.m { + if _, skip := visitor.skip[t]; skip { + continue + } + for fieldName, v := range visitor.m[t] { + if !reportExported && ast.IsExported(fieldName) { + continue + } + if v == 0 { + field, _, _ := types.LookupFieldOrMethod(t, false, pkg.Pkg, fieldName) + if field == nil { + fmt.Printf("%s: unknown field or method: %s.%s\n", pkg.Pkg.Path(), t, fieldName) + continue + } + if fieldName == "XMLName" { + if named, ok := field.Type().(*types.Named); ok && named.Obj().Pkg().Path() == "encoding/xml" { + continue + } + } + pos := program.Fset.Position(field.Pos()) + issues = append(issues, Issue{ + Pos: pos, + Type: types.TypeString(t, nil), + FieldName: fieldName, + }) + } + } + } + } + + return issues +} -- cgit mrf-deployment