|
| 1 | +package main |
| 2 | + |
| 3 | +import ( |
| 4 | + "bytes" |
| 5 | + "flag" |
| 6 | + "fmt" |
| 7 | + "go/ast" |
| 8 | + "go/parser" |
| 9 | + "go/token" |
| 10 | + "io/fs" |
| 11 | + "os" |
| 12 | + "path/filepath" |
| 13 | + |
| 14 | + "github.com/ydb-platform/ydb-go-sdk/v3/internal/cmd/gstack/utils" |
| 15 | +) |
| 16 | + |
| 17 | +func usage() { |
| 18 | + fmt.Fprintf(os.Stderr, "usage: gstack [path]\n") |
| 19 | + flag.PrintDefaults() |
| 20 | +} |
| 21 | + |
| 22 | +func getCallExpressionsFromExpr(expr ast.Expr) (listOfCalls []*ast.CallExpr) { |
| 23 | + switch expr := expr.(type) { |
| 24 | + case *ast.SelectorExpr: |
| 25 | + listOfCalls = getCallExpressionsFromExpr(expr.X) |
| 26 | + case *ast.IndexExpr: |
| 27 | + listOfCalls = getCallExpressionsFromExpr(expr.X) |
| 28 | + case *ast.StarExpr: |
| 29 | + listOfCalls = getCallExpressionsFromExpr(expr.X) |
| 30 | + case *ast.BinaryExpr: |
| 31 | + listOfCalls = getCallExpressionsFromExpr(expr.X) |
| 32 | + listOfCalls = append(listOfCalls, getCallExpressionsFromExpr(expr.Y)...) |
| 33 | + case *ast.CallExpr: |
| 34 | + listOfCalls = append(listOfCalls, expr) |
| 35 | + listOfCalls = append(listOfCalls, getCallExpressionsFromExpr(expr.Fun)...) |
| 36 | + for _, arg := range expr.Args { |
| 37 | + listOfCalls = append(listOfCalls, getCallExpressionsFromExpr(arg)...) |
| 38 | + } |
| 39 | + case *ast.CompositeLit: |
| 40 | + for _, elt := range expr.Elts { |
| 41 | + listOfCalls = append(listOfCalls, getCallExpressionsFromExpr(elt)...) |
| 42 | + } |
| 43 | + case *ast.UnaryExpr: |
| 44 | + listOfCalls = append(listOfCalls, getCallExpressionsFromExpr(expr.X)...) |
| 45 | + case *ast.KeyValueExpr: |
| 46 | + listOfCalls = append(listOfCalls, getCallExpressionsFromExpr(expr.Value)...) |
| 47 | + case *ast.FuncLit: |
| 48 | + listOfCalls = append(listOfCalls, getListOfCallExpressionsFromBlockStmt(expr.Body)...) |
| 49 | + } |
| 50 | + |
| 51 | + return listOfCalls |
| 52 | +} |
| 53 | + |
| 54 | +func getExprFromDeclStmt(statement *ast.DeclStmt) (listOfExpressions []ast.Expr) { |
| 55 | + decl, ok := statement.Decl.(*ast.GenDecl) |
| 56 | + if !ok { |
| 57 | + return listOfExpressions |
| 58 | + } |
| 59 | + for _, spec := range decl.Specs { |
| 60 | + if spec, ok := spec.(*ast.ValueSpec); ok { |
| 61 | + listOfExpressions = append(listOfExpressions, spec.Values...) |
| 62 | + } |
| 63 | + } |
| 64 | + |
| 65 | + return listOfExpressions |
| 66 | +} |
| 67 | + |
| 68 | +func getCallExpressionsFromStmt(statement ast.Stmt) (listOfCallExpressions []*ast.CallExpr) { |
| 69 | + var body *ast.BlockStmt |
| 70 | + var listOfExpressions []ast.Expr |
| 71 | + switch stmt := statement.(type) { |
| 72 | + case *ast.IfStmt: |
| 73 | + body = stmt.Body |
| 74 | + case *ast.SwitchStmt: |
| 75 | + body = stmt.Body |
| 76 | + case *ast.TypeSwitchStmt: |
| 77 | + body = stmt.Body |
| 78 | + case *ast.SelectStmt: |
| 79 | + body = stmt.Body |
| 80 | + case *ast.ForStmt: |
| 81 | + body = stmt.Body |
| 82 | + case *ast.RangeStmt: |
| 83 | + body = stmt.Body |
| 84 | + case *ast.DeclStmt: |
| 85 | + listOfExpressions = append(listOfExpressions, getExprFromDeclStmt(stmt)...) |
| 86 | + for _, expr := range listOfExpressions { |
| 87 | + listOfCallExpressions = append(listOfCallExpressions, getCallExpressionsFromExpr(expr)...) |
| 88 | + } |
| 89 | + case *ast.CommClause: |
| 90 | + stmts := stmt.Body |
| 91 | + for _, stmt := range stmts { |
| 92 | + listOfCallExpressions = append(listOfCallExpressions, getCallExpressionsFromStmt(stmt)...) |
| 93 | + } |
| 94 | + case *ast.ExprStmt: |
| 95 | + listOfCallExpressions = append(listOfCallExpressions, getCallExpressionsFromExpr(stmt.X)...) |
| 96 | + } |
| 97 | + if body != nil { |
| 98 | + listOfCallExpressions = append( |
| 99 | + listOfCallExpressions, |
| 100 | + getListOfCallExpressionsFromBlockStmt(body)..., |
| 101 | + ) |
| 102 | + } |
| 103 | + |
| 104 | + return listOfCallExpressions |
| 105 | +} |
| 106 | + |
| 107 | +func getListOfCallExpressionsFromBlockStmt(block *ast.BlockStmt) (listOfCallExpressions []*ast.CallExpr) { |
| 108 | + for _, statement := range block.List { |
| 109 | + switch expr := statement.(type) { |
| 110 | + case *ast.ExprStmt: |
| 111 | + listOfCallExpressions = append(listOfCallExpressions, getCallExpressionsFromExpr(expr.X)...) |
| 112 | + case *ast.ReturnStmt: |
| 113 | + for _, result := range expr.Results { |
| 114 | + listOfCallExpressions = append(listOfCallExpressions, getCallExpressionsFromExpr(result)...) |
| 115 | + } |
| 116 | + case *ast.AssignStmt: |
| 117 | + for _, rh := range expr.Rhs { |
| 118 | + listOfCallExpressions = append(listOfCallExpressions, getCallExpressionsFromExpr(rh)...) |
| 119 | + } |
| 120 | + default: |
| 121 | + listOfCallExpressions = append(listOfCallExpressions, getCallExpressionsFromStmt(statement)...) |
| 122 | + } |
| 123 | + } |
| 124 | + |
| 125 | + return listOfCallExpressions |
| 126 | +} |
| 127 | + |
| 128 | +func format(src []byte, path string, fset *token.FileSet, file *ast.File) ([]byte, error) { |
| 129 | + var listOfArgs []utils.FunctionIDArg |
| 130 | + for _, f := range file.Decls { |
| 131 | + var listOfCalls []*ast.CallExpr |
| 132 | + fn, ok := f.(*ast.FuncDecl) |
| 133 | + if !ok { |
| 134 | + continue |
| 135 | + } |
| 136 | + listOfCalls = getListOfCallExpressionsFromBlockStmt(fn.Body) |
| 137 | + for _, call := range listOfCalls { |
| 138 | + if function, ok := call.Fun.(*ast.SelectorExpr); ok && function.Sel.Name == "FunctionID" { |
| 139 | + pack, ok := function.X.(*ast.Ident) |
| 140 | + if !ok { |
| 141 | + continue |
| 142 | + } |
| 143 | + if pack.Name == "stack" && len(call.Args) == 1 { |
| 144 | + listOfArgs = append(listOfArgs, utils.FunctionIDArg{ |
| 145 | + FuncDecl: fn, |
| 146 | + ArgPos: call.Args[0].Pos(), |
| 147 | + ArgEnd: call.Args[0].End(), |
| 148 | + }) |
| 149 | + } |
| 150 | + } |
| 151 | + } |
| 152 | + } |
| 153 | + if len(listOfArgs) != 0 { |
| 154 | + fixed, err := utils.FixSource(fset, path, src, listOfArgs) |
| 155 | + if err != nil { |
| 156 | + return nil, err |
| 157 | + } |
| 158 | + |
| 159 | + return fixed, nil |
| 160 | + } |
| 161 | + |
| 162 | + return src, nil |
| 163 | +} |
| 164 | + |
| 165 | +func processFile(src []byte, path string, fset *token.FileSet, file *ast.File, info os.FileInfo) error { |
| 166 | + formatted, err := format(src, path, fset, file) |
| 167 | + if err != nil { |
| 168 | + return err |
| 169 | + } |
| 170 | + if !bytes.Equal(src, formatted) { |
| 171 | + err = utils.WriteFile(path, formatted, info.Mode().Perm()) |
| 172 | + if err != nil { |
| 173 | + return err |
| 174 | + } |
| 175 | + } |
| 176 | + |
| 177 | + return nil |
| 178 | +} |
| 179 | + |
| 180 | +func main() { |
| 181 | + flag.Usage = usage |
| 182 | + flag.Parse() |
| 183 | + args := flag.Args() |
| 184 | + |
| 185 | + if len(args) != 1 { |
| 186 | + flag.Usage() |
| 187 | + |
| 188 | + return |
| 189 | + } |
| 190 | + _, err := os.Stat(args[0]) |
| 191 | + if err != nil { |
| 192 | + panic(err) |
| 193 | + } |
| 194 | + |
| 195 | + fileSystem := os.DirFS(args[0]) |
| 196 | + |
| 197 | + err = fs.WalkDir(fileSystem, ".", func(path string, d fs.DirEntry, err error) error { |
| 198 | + fset := token.NewFileSet() |
| 199 | + if err != nil { |
| 200 | + return err |
| 201 | + } |
| 202 | + if d.IsDir() { |
| 203 | + return nil |
| 204 | + } |
| 205 | + if filepath.Ext(path) == ".go" { |
| 206 | + info, err := os.Stat(path) |
| 207 | + if err != nil { |
| 208 | + return err |
| 209 | + } |
| 210 | + src, err := utils.ReadFile(path, info) |
| 211 | + if err != nil { |
| 212 | + return err |
| 213 | + } |
| 214 | + file, err := parser.ParseFile(fset, path, nil, 0) |
| 215 | + if err != nil { |
| 216 | + return err |
| 217 | + } |
| 218 | + |
| 219 | + return processFile(src, path, fset, file, info) |
| 220 | + } |
| 221 | + |
| 222 | + return nil |
| 223 | + }) |
| 224 | + if err != nil { |
| 225 | + panic(err) |
| 226 | + } |
| 227 | +} |
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