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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// This file contains support functions for parsing .go files.
// Similar functionality is found in package go/parser but the
// functions here operate using godoc's file system fs instead
// of calling the OS's file operations directly.
package main
import (
"go/ast"
"go/parser"
"go/token"
"os"
"path/filepath"
)
func parseFiles(fset *token.FileSet, filenames []string) (pkgs map[string]*ast.Package, first os.Error) {
pkgs = make(map[string]*ast.Package)
for _, filename := range filenames {
src, err := fs.ReadFile(filename)
if err != nil {
if first == nil {
first = err
}
continue
}
file, err := parser.ParseFile(fset, filename, src, parser.ParseComments)
if err != nil {
if first == nil {
first = err
}
continue
}
name := file.Name.Name
pkg, found := pkgs[name]
if !found {
// TODO(gri) Use NewPackage here; reconsider ParseFiles API.
pkg = &ast.Package{name, nil, nil, make(map[string]*ast.File)}
pkgs[name] = pkg
}
pkg.Files[filename] = file
}
return
}
func parseDir(fset *token.FileSet, path string, filter func(FileInfo) bool) (map[string]*ast.Package, os.Error) {
list, err := fs.ReadDir(path)
if err != nil {
return nil, err
}
filenames := make([]string, len(list))
i := 0
for _, d := range list {
if filter == nil || filter(d) {
filenames[i] = filepath.Join(path, d.Name())
i++
}
}
filenames = filenames[0:i]
return parseFiles(fset, filenames)
}
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