func main() {
var buf bytes.Buffer
outf := func(format string, args ...interface{}) {
fmt.Fprintf(&buf, format, args...)
}
outf("// AUTO-GENERATED BY mkstdlib.go\n\n")
outf("package imports\n")
outf("var stdlib = map[string]string{\n")
f := io.MultiReader(
mustOpen(api("go1.txt")),
mustOpen(api("go1.1.txt")),
mustOpen(api("go1.2.txt")),
mustOpen(api("go1.3.txt")),
mustOpen(api("go1.4.txt")),
mustOpen(api("go1.5.txt")),
)
sc := bufio.NewScanner(f)
fullImport := map[string]string{} // "zip.NewReader" => "archive/zip"
ambiguous := map[string]bool{}
var keys []string
for sc.Scan() {
l := sc.Text()
has := func(v string) bool { return strings.Contains(l, v) }
if has("struct, ") || has("interface, ") || has(", method (") {
continue
}
if m := sym.FindStringSubmatch(l); m != nil {
full := m[1]
key := path.Base(full) + "." + m[2]
if exist, ok := fullImport[key]; ok {
if exist != full {
ambiguous[key] = true
}
} else {
fullImport[key] = full
keys = append(keys, key)
}
}
}
if err := sc.Err(); err != nil {
log.Fatal(err)
}
sort.Strings(keys)
for _, key := range keys {
if ambiguous[key] {
outf("\t// %q is ambiguous\n", key)
} else {
outf("\t%q: %q,\n", key, fullImport[key])
}
}
outf("}\n")
fmtbuf, err := format.Source(buf.Bytes())
if err != nil {
log.Fatal(err)
}
os.Stdout.Write(fmtbuf)
}
func handleMsg(msg msgType) {
c := msg.c
if c == nil {
log.Println("c shouldn't be nil")
return
}
switch msg.Type {
case "format":
resp := &msgType{
Type: "format",
}
func() {
defer func() {
if r := recover(); r != nil {
value := fmt.Sprintln(r)
stack := make([]byte, 99999)
runtime.Stack(stack, false)
value += string(stack)
resp.Value = value
}
}()
formatted, err := format.Source([]byte(msg.Value.(string)))
if err == nil {
resp.Value = string(formatted)
}
}()
c.WriteJSON(resp)
case "translate":
resp := &msgType{
Type: "translate",
}
func() {
defer func() {
if r := recover(); r != nil {
value := fmt.Sprintln(r)
stack := make([]byte, 99999)
runtime.Stack(stack, false)
value += string(stack)
resp.Value = value
}
}()
w := &bytes.Buffer{}
errs := sgo.TranslateFile(func() (io.Writer, error) { return w, nil }, strings.NewReader(msg.Value.(string)), "name")
if errs != nil {
var errMsgs []string
for _, err := range errs {
if errs, ok := err.(scanner.ErrorList); ok {
for _, err := range errs {
errMsgs = append(errMsgs, err.Error())
}
} else {
errMsgs = append(errMsgs, err.Error())
}
}
resp.Value = strings.Join(errMsgs, "\n")
} else {
resp.Value = w.String()
}
}()
c.WriteJSON(resp)
case "execute":
resp := &msgType{
Type: "execute",
}
body := url.Values{}
body.Add("version", "2")
var errs []error
w := &bytes.Buffer{}
func() {
defer func() {
if r := recover(); r != nil {
value := fmt.Sprintln(r)
stack := make([]byte, 99999)
runtime.Stack(stack, false)
value += string(stack)
errs = append(errs, errors.New(value))
}
}()
errs = sgo.TranslateFile(func() (io.Writer, error) { return w, nil }, strings.NewReader(msg.Value.(string)), "name")
}()
if errs != nil {
var errMsgs []string
for _, err := range errs {
if errs, ok := err.(scanner.ErrorList); ok {
for _, err := range errs {
errMsgs = append(errMsgs, err.Error())
}
} else {
errMsgs = append(errMsgs, err.Error())
}
}
resp.Value = strings.Join(errMsgs, "\n")
} else {
body.Add("body", w.String())
postResp, err := http.PostForm("https://play.golang.org/compile", body)
if err != nil {
resp.Value = err.Error()
} else {
var v interface{}
err := json.NewDecoder(postResp.Body).Decode(&v)
postResp.Body.Close()
if err != nil {
resp.Value = err.Error()
} else {
resp.Value = v
}
}
}
c.WriteJSON(resp)
}
}
// Process formats and adjusts imports for the provided file.
// If opt is nil the defaults are used.
//
// Note that filename's directory influences which imports can be chosen,
// so it is important that filename be accurate.
// To process data ``as if'' it were in filename, pass the data as a non-nil src.
func Process(filename string, src []byte, opt *Options) ([]byte, error) {
if opt == nil {
opt = &Options{Comments: true, TabIndent: true, TabWidth: 8}
}
fileSet := token.NewFileSet()
file, adjust, err := parse(fileSet, filename, src, opt)
if err != nil {
return nil, err
}
if !opt.FormatOnly {
_, err = fixImports(fileSet, file, filename)
if err != nil {
return nil, err
}
}
sortImports(fileSet, file)
imps := astutil.Imports(fileSet, file)
var spacesBefore []string // import paths we need spaces before
for _, impSection := range imps {
// Within each block of contiguous imports, see if any
// import lines are in different group numbers. If so,
// we'll need to put a space between them so it's
// compatible with gofmt.
lastGroup := -1
for _, importSpec := range impSection {
importPath, _ := strconv.Unquote(importSpec.Path.Value)
groupNum := importGroup(importPath)
if groupNum != lastGroup && lastGroup != -1 {
spacesBefore = append(spacesBefore, importPath)
}
lastGroup = groupNum
}
}
printerMode := printer.UseSpaces
if opt.TabIndent {
printerMode |= printer.TabIndent
}
printConfig := &printer.Config{Mode: printerMode, Tabwidth: opt.TabWidth}
var buf bytes.Buffer
err = printConfig.Fprint(&buf, fileSet, file)
if err != nil {
return nil, err
}
out := buf.Bytes()
if adjust != nil {
out = adjust(src, out)
}
if len(spacesBefore) > 0 {
out = addImportSpaces(bytes.NewReader(out), spacesBefore)
}
out, err = format.Source(out)
if err != nil {
return nil, err
}
return out, nil
}
func main() {
// Don't use GOPATH.
ctx := build.Default
ctx.GOPATH = ""
// Populate pkgIndex global from GOROOT.
for _, path := range ctx.SrcDirs() {
f, err := os.Open(path)
if err != nil {
log.Print(err)
continue
}
children, err := f.Readdir(-1)
f.Close()
if err != nil {
log.Print(err)
continue
}
for _, child := range children {
if child.IsDir() {
loadPkg(path, child.Name())
}
}
}
// Populate exports global.
for _, ps := range pkgIndex {
for _, p := range ps {
e := loadExports(p.dir)
if e != nil {
exports[p.dir] = e
}
}
}
// Construct source file.
var buf bytes.Buffer
fmt.Fprint(&buf, pkgIndexHead)
fmt.Fprintf(&buf, "var pkgIndexMaster = %#v\n", pkgIndex)
fmt.Fprintf(&buf, "var exportsMaster = %#v\n", exports)
src := buf.Bytes()
// Replace main.pkg type name with pkg.
src = bytes.Replace(src, []byte("main.pkg"), []byte("pkg"), -1)
// Replace actual GOROOT with "/go".
src = bytes.Replace(src, []byte(ctx.GOROOT), []byte("/go"), -1)
// Add some line wrapping.
src = bytes.Replace(src, []byte("}, "), []byte("},\n"), -1)
src = bytes.Replace(src, []byte("true, "), []byte("true,\n"), -1)
var err error
src, err = format.Source(src)
if err != nil {
log.Fatal(err)
}
// Write out source file.
err = ioutil.WriteFile("pkgindex.go", src, 0644)
if err != nil {
log.Fatal(err)
}
}