1 files changed, 0 insertions, 274 deletions
diff --git a/tools/go_generics/generics.go b/tools/go_generics/generics.go
deleted file mode 100644
index ca414d8cb..000000000
--- a/tools/go_generics/generics.go
+++ /dev/null
@@ -1,274 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// go_generics reads a Go source file and writes a new version of that file with
-// a few transformations applied to each. Namely:
-//
-// 1. Global types can be explicitly renamed with the -t option. For example,
-//    if -t=A=B is passed in, all references to A will be replaced with
-//    references to B; a function declaration like:
-//
-//    func f(arg *A)
-//
-//    would be renamed to:
-//
-//    func f(arg *B)
-//
-// 2. Global type definitions and their method sets will be removed when they're
-//    being renamed with -t. For example, if -t=A=B is passed in, the following
-//    definition and methods that existed in the input file wouldn't exist at
-//    all in the output file:
-//
-//    type A struct{}
-//
-//    func (*A) f() {}
-//
-// 3. All global types, variables, constants and functions (not methods) are
-//    prefixed and suffixed based on the option -prefix and -suffix arguments.
-//    For example, if -suffix=A is passed in, the following globals:
-//
-//    func f()
-//    type t struct{}
-//
-//    would be renamed to:
-//
-//    func fA()
-//    type tA struct{}
-//
-//    Some special tags are also modified. For example:
-//
-//    "state:.(t)"
-//
-//    would become:
-//
-//    "state:.(tA)"
-//
-// 4. The package is renamed to the value via the -p argument.
-// 5. Value of constants can be modified with -c argument.
-//
-// Note that not just the top-level declarations are renamed, all references to
-// them are also properly renamed as well, taking into account visibility rules
-// and shadowing. For example, if -suffix=A is passed in, the following:
-//
-// var b = 100
-//
-// func f() {
-//   g(b)
-//   b := 0
-//   g(b)
-// }
-//
-// Would be replaced with:
-//
-// var bA = 100
-//
-// func f() {
-//   g(bA)
-//   b := 0
-//   g(b)
-// }
-//
-// Note that the second call to g() kept "b" as an argument because it refers to
-// the local variable "b".
-//
-// Unfortunately, go_generics does not handle anonymous fields with renamed types.
-package main
-
-import (
-	"bytes"
-	"flag"
-	"fmt"
-	"go/ast"
-	"go/format"
-	"go/parser"
-	"go/token"
-	"io/ioutil"
-	"os"
-	"regexp"
-	"strings"
-
-	"gvisor.googlesource.com/gvisor/tools/go_generics/globals"
-)
-
-var (
-	input       = flag.String("i", "", "input `file`")
-	output      = flag.String("o", "", "output `file`")
-	suffix      = flag.String("suffix", "", "`suffix` to add to each global symbol")
-	prefix      = flag.String("prefix", "", "`prefix` to add to each global symbol")
-	packageName = flag.String("p", "main", "output package `name`")
-	printAST    = flag.Bool("ast", false, "prints the AST")
-	types       = make(mapValue)
-	consts      = make(mapValue)
-	imports     = make(mapValue)
-)
-
-// mapValue implements flag.Value. We use a mapValue flag instead of a regular
-// string flag when we want to allow more than one instance of the flag. For
-// example, we allow several "-t A=B" arguments, and will rename them all.
-type mapValue map[string]string
-
-func (m mapValue) String() string {
-	var b bytes.Buffer
-	first := true
-	for k, v := range m {
-		if !first {
-			b.WriteRune(',')
-		} else {
-			first = false
-		}
-		b.WriteString(k)
-		b.WriteRune('=')
-		b.WriteString(v)
-	}
-	return b.String()
-}
-
-func (m mapValue) Set(s string) error {
-	sep := strings.Index(s, "=")
-	if sep == -1 {
-		return fmt.Errorf("missing '=' from '%s'", s)
-	}
-
-	m[s[:sep]] = s[sep+1:]
-
-	return nil
-}
-
-// stateTagRegexp matches against the 'typed' state tags.
-var stateTagRegexp = regexp.MustCompile(`^(.*[^a-z0-9_])state:"\.\(([^\)]*)\)"(.*)$`)
-
-var identifierRegexp = regexp.MustCompile(`^(.*[^a-zA-Z_])([a-zA-Z_][a-zA-Z0-9_]*)(.*)$`)
-
-func main() {
-	flag.Usage = func() {
-		fmt.Fprintf(os.Stderr, "Usage: %s [options]\n", os.Args[0])
-		flag.PrintDefaults()
-	}
-
-	flag.Var(types, "t", "rename type A to B when `A=B` is passed in. Multiple such mappings are allowed.")
-	flag.Var(consts, "c", "reassign constant A to value B when `A=B` is passed in. Multiple such mappings are allowed.")
-	flag.Var(imports, "import", "specifies the import libraries to use when types are not local. `name=path` specifies that 'name', used in types as name.type, refers to the package living in 'path'.")
-	flag.Parse()
-
-	if *input == "" || *output == "" {
-		flag.Usage()
-		os.Exit(1)
-	}
-
-	// Parse the input file.
-	fset := token.NewFileSet()
-	f, err := parser.ParseFile(fset, *input, nil, parser.ParseComments|parser.DeclarationErrors|parser.SpuriousErrors)
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "%v\n", err)
-		os.Exit(1)
-	}
-
-	// Print the AST if requested.
-	if *printAST {
-		ast.Print(fset, f)
-	}
-
-	cmap := ast.NewCommentMap(fset, f, f.Comments)
-
-	// Update imports based on what's used in types and consts.
-	maps := []mapValue{types, consts}
-	importDecl, err := updateImports(maps, imports)
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "%v\n", err)
-		os.Exit(1)
-	}
-	types = maps[0]
-	consts = maps[1]
-
-	// Reassign all specified constants.
-	for _, decl := range f.Decls {
-		d, ok := decl.(*ast.GenDecl)
-		if !ok || d.Tok != token.CONST {
-			continue
-		}
-
-		for _, gs := range d.Specs {
-			s := gs.(*ast.ValueSpec)
-			for i, id := range s.Names {
-				if n, ok := consts[id.Name]; ok {
-					s.Values[i] = &ast.BasicLit{Value: n}
-				}
-			}
-		}
-	}
-
-	// Go through all globals and their uses in the AST and rename the types
-	// with explicitly provided names, and rename all types, variables,
-	// consts and functions with the provided prefix and suffix.
-	globals.Visit(fset, f, func(ident *ast.Ident, kind globals.SymKind) {
-		if n, ok := types[ident.Name]; ok && kind == globals.KindType {
-			ident.Name = n
-		} else {
-			switch kind {
-			case globals.KindType, globals.KindVar, globals.KindConst, globals.KindFunction:
-				ident.Name = *prefix + ident.Name + *suffix
-			case globals.KindTag:
-				// Modify the state tag appropriately.
-				if m := stateTagRegexp.FindStringSubmatch(ident.Name); m != nil {
-					if t := identifierRegexp.FindStringSubmatch(m[2]); t != nil {
-						ident.Name = m[1] + `state:".(` + t[1] + *prefix + t[2] + *suffix + t[3] + `)"` + m[3]
-					}
-				}
-			}
-		}
-	})
-
-	// Remove the definition of all types that are being remapped.
-	set := make(typeSet)
-	for _, v := range types {
-		set[v] = struct{}{}
-	}
-	removeTypes(set, f)
-
-	// Add the new imports, if any, to the top.
-	if importDecl != nil {
-		newDecls := make([]ast.Decl, 0, len(f.Decls)+1)
-		newDecls = append(newDecls, importDecl)
-		newDecls = append(newDecls, f.Decls...)
-		f.Decls = newDecls
-	}
-
-	// Update comments to remove the ones potentially associated with the
-	// type T that we removed.
-	f.Comments = cmap.Filter(f).Comments()
-
-	// If there are file (package) comments, delete them.
-	if f.Doc != nil {
-		for i, cg := range f.Comments {
-			if cg == f.Doc {
-				f.Comments = append(f.Comments[:i], f.Comments[i+1:]...)
-				break
-			}
-		}
-	}
-
-	// Write the output file.
-	f.Name.Name = *packageName
-
-	var buf bytes.Buffer
-	if err := format.Node(&buf, fset, f); err != nil {
-		fmt.Fprintf(os.Stderr, "%v\n", err)
-		os.Exit(1)
-	}
-
-	if err := ioutil.WriteFile(*output, buf.Bytes(), 0644); err != nil {
-		fmt.Fprintf(os.Stderr, "%v\n", err)
-		os.Exit(1)
-	}
-}