Added func getControllerInfo

autorouter.go

@@ -0,0 +1,282 @@
+// Copyright 2013 Bee 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.
+
+package main
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"go/ast"
+	gobuild "go/build"
+	"go/doc"
+	"go/parser"
+	"go/token"
+	"io"
+	"io/ioutil"
+	"os"
+	"path"
+	"runtime"
+	"strings"
+	"time"
+)
+
+var cmdRouter = &Command{
+	UsageLine: "router",
+	Short:     "auto-generate routers for the app controllers",
+	Long: `
+  
+`,
+}
+
+func init() {
+	cmdRouter.Run = autoRouter
+}
+
+func autoRouter(cmd *Command, args []string) {
+	fmt.Println("[INFO] Starting auto-generating routers...")
+}
+
+// getControllerInfo returns controllers that embeded "beego.controller"
+// and their methods of package in given path.
+func getControllerInfo(path string) (map[string][]string, error) {
+	now := time.Now()
+	path = strings.TrimSuffix(path, "/")
+	dir, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+
+	fis, err := dir.Readdir(0)
+	if err != nil {
+		return nil, err
+	}
+
+	files := make([]*source, 0, len(fis))
+	for _, fi := range fis {
+		// Only load go files.
+		if strings.HasSuffix(fi.Name(), ".go") {
+			f, err := os.Open(path + "/" + fi.Name())
+			if err != nil {
+				return nil, err
+			}
+
+			p := make([]byte, fi.Size())
+			_, err = f.Read(p)
+			if err != nil {
+				return nil, err
+			}
+
+			f.Close()
+			files = append(files, &source{
+				name: path + "/" + fi.Name(),
+				data: p,
+			})
+		}
+	}
+
+	rw := &routerWalker{
+		pdoc: &Package{
+			ImportPath: path,
+		},
+	}
+
+	cm := make(map[string][]string)
+	pdoc, err := rw.build(files)
+	for _, t := range pdoc.Types {
+		// Check if embeded "beego.Controller".
+		if strings.Index(t.Decl, "beego.Controller") > -1 {
+			for _, f := range t.Methods {
+				cm[t.Name] = append(cm[t.Name], f.Name)
+			}
+		}
+	}
+	fmt.Println(time.Since(now))
+	return cm, nil
+}
+
+// A source describles a source code file.
+type source struct {
+	name string
+	data []byte
+}
+
+func (s *source) Name() string       { return s.name }
+func (s *source) Size() int64        { return int64(len(s.data)) }
+func (s *source) Mode() os.FileMode  { return 0 }
+func (s *source) ModTime() time.Time { return time.Time{} }
+func (s *source) IsDir() bool        { return false }
+func (s *source) Sys() interface{}   { return nil }
+
+// A routerWalker holds the state used when building the documentation.
+type routerWalker struct {
+	pdoc *Package
+	srcs map[string]*source // Source files.
+	fset *token.FileSet
+	buf  []byte // scratch space for printNode method.
+}
+
+// Package represents full information and documentation for a package.
+type Package struct {
+	ImportPath string
+
+	// Top-level declarations.
+	Types []*Type
+}
+
+// Type represents structs and interfaces.
+type Type struct {
+	Name    string // Type name.
+	Decl    string
+	Methods []*Func // Exported methods.
+}
+
+// Func represents functions
+type Func struct {
+	Name string
+}
+
+// build generates data from source files.
+func (w *routerWalker) build(srcs []*source) (*Package, error) {
+	// Add source files to walker, I skipped references here.
+	w.srcs = make(map[string]*source)
+	for _, src := range srcs {
+		w.srcs[src.name] = src
+	}
+
+	w.fset = token.NewFileSet()
+
+	// Find the package and associated files.
+	ctxt := gobuild.Context{
+		GOOS:          runtime.GOOS,
+		GOARCH:        runtime.GOARCH,
+		CgoEnabled:    true,
+		JoinPath:      path.Join,
+		IsAbsPath:     path.IsAbs,
+		SplitPathList: func(list string) []string { return strings.Split(list, ":") },
+		IsDir:         func(path string) bool { panic("unexpected") },
+		HasSubdir:     func(root, dir string) (rel string, ok bool) { panic("unexpected") },
+		ReadDir:       func(dir string) (fi []os.FileInfo, err error) { return w.readDir(dir) },
+		OpenFile:      func(path string) (r io.ReadCloser, err error) { return w.openFile(path) },
+		Compiler:      "gc",
+	}
+
+	bpkg, err := ctxt.ImportDir(w.pdoc.ImportPath, 0)
+	// Continue if there are no Go source files; we still want the directory info.
+	_, nogo := err.(*gobuild.NoGoError)
+	if err != nil {
+		if nogo {
+			err = nil
+		} else {
+			return nil, errors.New("routerWalker.build -> " + err.Error())
+		}
+	}
+
+	// Parse the Go files
+	files := make(map[string]*ast.File)
+	for _, name := range append(bpkg.GoFiles, bpkg.CgoFiles...) {
+		file, err := parser.ParseFile(w.fset, name, w.srcs[name].data, parser.ParseComments)
+		if err != nil {
+			return nil, errors.New("routerWalker.build -> parse go files: " + err.Error())
+		}
+		files[name] = file
+	}
+
+	apkg, _ := ast.NewPackage(w.fset, files, simpleImporter, nil)
+
+	mode := doc.Mode(0)
+	if w.pdoc.ImportPath == "builtin" {
+		mode |= doc.AllDecls
+	}
+
+	pdoc := doc.New(apkg, w.pdoc.ImportPath, mode)
+
+	w.pdoc.Types = w.types(pdoc.Types)
+
+	return w.pdoc, err
+}
+
+func (w *routerWalker) funcs(fdocs []*doc.Func) []*Func {
+	var result []*Func
+	for _, d := range fdocs {
+		result = append(result, &Func{
+			Name: d.Name,
+		})
+	}
+	return result
+}
+
+func (w *routerWalker) types(tdocs []*doc.Type) []*Type {
+	var result []*Type
+	for _, d := range tdocs {
+		result = append(result, &Type{
+			Decl:    w.printDecl(d.Decl),
+			Name:    d.Name,
+			Methods: w.funcs(d.Methods),
+		})
+	}
+	return result
+}
+
+func (w *routerWalker) printDecl(decl ast.Node) string {
+	var d Code
+	d, w.buf = printDecl(decl, w.fset, w.buf)
+	return d.Text
+}
+
+func (w *routerWalker) readDir(dir string) ([]os.FileInfo, error) {
+	if dir != w.pdoc.ImportPath {
+		panic("unexpected")
+	}
+	fis := make([]os.FileInfo, 0, len(w.srcs))
+	for _, src := range w.srcs {
+		fis = append(fis, src)
+	}
+	return fis, nil
+}
+
+func (w *routerWalker) openFile(path string) (io.ReadCloser, error) {
+	if strings.HasPrefix(path, w.pdoc.ImportPath+"/") {
+		if src, ok := w.srcs[path[len(w.pdoc.ImportPath)+1:]]; ok {
+			return ioutil.NopCloser(bytes.NewReader(src.data)), nil
+		}
+	}
+	panic("unexpected")
+}
+
+func simpleImporter(imports map[string]*ast.Object, path string) (*ast.Object, error) {
+	pkg := imports[path]
+	if pkg == nil {
+		// Guess the package name without importing it. Start with the last
+		// element of the path.
+		name := path[strings.LastIndex(path, "/")+1:]
+
+		// Trim commonly used prefixes and suffixes containing illegal name
+		// runes.
+		name = strings.TrimSuffix(name, ".go")
+		name = strings.TrimSuffix(name, "-go")
+		name = strings.TrimPrefix(name, "go.")
+		name = strings.TrimPrefix(name, "go-")
+		name = strings.TrimPrefix(name, "biogo.")
+
+		// It's also common for the last element of the path to contain an
+		// extra "go" prefix, but not always. TODO: examine unresolved ids to
+		// detect when trimming the "go" prefix is appropriate.
+
+		pkg = ast.NewObj(ast.Pkg, name)
+		pkg.Data = ast.NewScope(nil)
+		imports[path] = pkg
+	}
+	return pkg, nil
+}