Пример #1
0
// Flattens a main file with rewritten dependencies.
func flatten(pkg string, main []byte, deps [][]byte, remDead bool) ([]byte, error) {
	buffer := new(bytes.Buffer)

	// Dump all code pieces into a buffer
	fmt.Fprintf(buffer, "package %s\n\n", pkg)
	fmt.Fprintf(buffer, "%s\n\n", main)
	for _, dep := range deps {
		fmt.Fprintf(buffer, "%s\n\n", dep)
	}
	// Format the blob to Go standards and add imports
	blob, err := imports.Process("", buffer.Bytes(), nil)
	if err != nil {
		return nil, err
	}
	// Shake all dependencies, format and goimport again
	if remDead {
		if blob, err = shake(blob); err != nil {
			return nil, err
		}
		if blob, err = imports.Process("", blob, nil); err != nil {
			return nil, err
		}
	}
	return blob, nil
}
Пример #2
0
func main() {
	file := os.Args[1]
	if !strings.HasSuffix(file, ".go") || strings.HasSuffix(file, "_test.go") {
		log.Fatal("arg must be go file, not test")
	}

	in, err := Parse(file)
	if err != nil {
		log.Fatal(err)
	}
	var buf bytes.Buffer
	tmpl.Execute(&buf, in)
	src, err := imports.Process("", buf.Bytes(), nil)
	if err != nil {
		log.Fatalf("%s\nfailed to gofmt generated code: %v", src, err)
	}
	file = strings.TrimSuffix(file, ".go") + "_test.go"
	out, err := os.OpenFile(file, os.O_CREATE|os.O_EXCL|os.O_WRONLY, 0644)
	if err != nil {
		log.Fatal(err)
	}
	defer out.Close()
	if _, err := out.Write(src); err != nil {
		log.Fatal(err)
	}
}
Пример #3
0
func goimports(src []byte) (string, string) {
	out, err := imports.Process("", src, nil)
	if err != nil {
		return "", fmt.Sprintf("%v", err)
	}
	return string(out), ""
}
Пример #4
0
Файл: impl.go Проект: rhysd/impl
// findInterface returns the import path and identifier of an interface.
// For example, given "http.ResponseWriter", findInterface returns
// "net/http", "ResponseWriter".
func findInterface(iface string) (path string, id string, err error) {
	if len(strings.Fields(iface)) != 1 {
		return "", "", fmt.Errorf("couldn't parse interface: %s", iface)
	}

	// Let goimports do the heavy lifting.
	src := []byte("package hack\n" + "var i " + iface)
	imp, err := imports.Process("", src, nil)
	if err != nil {
		return "", "", fmt.Errorf("couldn't parse interface: %s", iface)
	}

	// imp should now contain an appropriate import.
	// Parse out the import and the identifier.
	fset := token.NewFileSet()
	f, err := parser.ParseFile(fset, "", imp, 0)
	if err != nil {
		panic(err)
	}
	if len(f.Imports) == 0 {
		return "", "", fmt.Errorf("unrecognized interface: %s", iface)
	}
	raw := f.Imports[0].Path.Value   // "io"
	path, err = strconv.Unquote(raw) // io
	if err != nil {
		panic(err)
	}
	decl := f.Decls[1].(*ast.GenDecl)      // var i io.Reader
	spec := decl.Specs[0].(*ast.ValueSpec) // i io.Reader
	sel := spec.Type.(*ast.SelectorExpr)   // io.Reader
	id = sel.Sel.Name                      // Reader
	return path, id, nil
}
Пример #5
0
func main() {
	iface := "http.Handler"
	src := "package hack; var i " + iface // HL
	fmt.Println(src, "\n---")

	imp, _ := imports.Process("", []byte(src), nil) // HL
	// ignoring errors throughout this presentation
	fmt.Println(string(imp))
}
Пример #6
0
Файл: app.go Проект: ngaut/gen
// WriteAll writes the generated code for all Types and TypeWriters in the App to respective files.
func (a *app) WriteAll() error {
	// TypeWriters which will write for each type; use string as key because Type is not comparable
	var writersByType = make(map[string][]TypeWriter)

	// validate them all (don't fail halfway)
	for _, t := range a.Types {
		for _, tw := range a.TypeWriters {
			write, err := tw.Validate(t)
			if err != nil {
				return err
			}
			if write {
				writersByType[t.String()] = append(writersByType[t.String()], tw)
			}
		}
	}

	// one buffer for each file, keyed by file name
	buffers := make(map[string]*bytes.Buffer)

	// write the generated code for each Type & TypeWriter into memory
	for _, t := range a.Types {
		for _, tw := range writersByType[t.String()] {
			var b bytes.Buffer
			write(&b, a, t, tw)
			// will append _test to file name if the source type is in a _test.go file
			f := strings.ToLower(fmt.Sprintf("%s_%s%s.go", t.Name, tw.Name(), t.test))
			buffers[f] = &b
		}
	}

	// validate generated ast's before committing to files
	for f, b := range buffers {
		if _, err := parser.ParseFile(token.NewFileSet(), f, b.String(), 0); err != nil {
			// TODO: prompt to write (ignored) _file on error? parsing errors are meaningless without.
			return err
		}
	}

	// format, remove unused imports, and commit to files
	for f, b := range buffers {
		src, err := imports.Process(f, b.Bytes(), nil)

		// shouldn't be an error if the ast parsing above succeeded
		if err != nil {
			return err
		}

		if err := writeFile(f, src); err != nil {
			return err
		}
	}

	return nil
}
Пример #7
0
func processFile(filename string, in io.Reader, out io.Writer, stdin bool) error {
	opt := options
	if stdin {
		nopt := *options
		nopt.Fragment = true
		opt = &nopt
	}

	if in == nil {
		f, err := os.Open(filename)
		if err != nil {
			return err
		}
		defer f.Close()
		in = f
	}

	src, err := ioutil.ReadAll(in)
	if err != nil {
		return err
	}

	res, err := imports.Process(filename, src, opt)
	if err != nil {
		return err
	}

	if !bytes.Equal(src, res) {
		// formatting has changed
		if *list {
			fmt.Fprintln(out, filename)
		}
		if *write {
			err = ioutil.WriteFile(filename, res, 0)
			if err != nil {
				return err
			}
		}
		if *doDiff {
			data, err := diff(src, res)
			if err != nil {
				return fmt.Errorf("computing diff: %s", err)
			}
			fmt.Printf("diff %s gofmt/%s\n", filename, filename)
			out.Write(data)
		}
	}

	if !*list && !*write && !*doDiff {
		_, err = out.Write(res)
	}

	return err
}
Пример #8
0
func generateFile(h *HitType) {

	code := &bytes.Buffer{}
	codeTemplate.Execute(code, h)

	newCode, err := imports.Process("prog.go", code.Bytes(), &imports.Options{
		AllErrors: true,
		TabWidth:  4,
		Comments:  true,
	})
	if err != nil {
		displayErr(code.String(), err)
	}

	fname := "type-" + h.Name + ".go"
	f, err := os.Create(fname)
	defer f.Close()
	if err != nil {
		log.Fatal(err)
	}
	f.Write(newCode)
	log.Println("generated " + fname)
}