remove assumption that all files belonging to a package are in the same directory:

- adjust ast.Package node and doc.PackageDoc correspondingly
- introduce parser.ParseFiles

R=rsc
CC=golang-dev
https://golang.org/cl/207087

src/pkg/exp/parser/interface.go

@@ -183,11 +183,12 @@ func ParsePackage(path string, filter func(*os.Dir) bool, mode uint) (*ast.Packa
 	for i := 0; i < len(list); i++ {
 		entry := &list[i]
 		if filter == nil || filter(entry) {
-			src, err := ParsePkgFile(name, pathutil.Join(path, entry.Name), mode)
+			filename := pathutil.Join(path, entry.Name)
+			src, err := ParsePkgFile(name, filename, mode)
 			if err != nil {
 				return nil, err
 			}
-			files[entry.Name] = src
+			files[filename] = src
 			if name == "" {
 				name = src.Name.Name()
 			}
@@ -198,5 +199,5 @@ func ParsePackage(path string, filter func(*os.Dir) bool, mode uint) (*ast.Packa
 		return nil, os.NewError(path + ": no package found")
 	}
 
-	return &ast.Package{name, path, nil, files}, nil
+	return &ast.Package{name, nil, files}, nil
 }

src/pkg/go/ast/ast.go

@@ -722,7 +722,6 @@ type File struct {
 //
 type Package struct {
 	Name  string           // package name
-	Path  string           // package path
 	Scope *Scope           // package scope
-	Files map[string]*File // path-relative filenames
+	Files map[string]*File // Go source files by filename
 }

src/pkg/go/doc/doc.go

@@ -293,7 +293,7 @@ func NewFileDoc(file *ast.File) *PackageDoc {
 	var r docReader
 	r.init(file.Name.Name())
 	r.addFile(file)
-	return r.newDoc("", "", nil)
+	return r.newDoc("", nil)
 }
 
 
@@ -307,7 +307,7 @@ func NewPackageDoc(pkg *ast.Package, importpath string) *PackageDoc {
 		filenames[i] = filename
 		i++
 	}
-	return r.newDoc(importpath, pkg.Path, filenames)
+	return r.newDoc(importpath, filenames)
 }
 
 
@@ -511,7 +511,6 @@ func makeBugDocs(v *vector.Vector) []string {
 type PackageDoc struct {
 	PackageName string
 	ImportPath  string
-	FilePath    string
 	Filenames   []string
 	Doc         string
 	Consts      []*ValueDoc
@@ -524,11 +523,10 @@ type PackageDoc struct {
 
 // newDoc returns the accumulated documentation for the package.
 //
-func (doc *docReader) newDoc(importpath, filepath string, filenames []string) *PackageDoc {
+func (doc *docReader) newDoc(importpath string, filenames []string) *PackageDoc {
 	p := new(PackageDoc)
 	p.PackageName = doc.pkgName
 	p.ImportPath = importpath
-	p.FilePath = filepath
 	sort.SortStrings(filenames)
 	p.Filenames = filenames
 	p.Doc = CommentText(doc.doc)

src/pkg/go/parser/interface.go

@@ -143,6 +143,35 @@ func ParseFile(filename string, src interface{}, scope *ast.Scope, mode uint) (*
 }
 
 
+// ParseFiles calls ParseFile for each file in the filenames list and returns
+// a map of package name -> package AST with all the packages found. The mode
+// bits are passed to ParseFile unchanged.
+//
+// Files with parse errors are ignored. In this case the map of packages may
+// be incomplete (missing packages and/or incomplete packages) and the last
+// error encountered is returned.
+//
+func ParseFiles(filenames []string, scope *ast.Scope, mode uint) (map[string]*ast.Package, os.Error) {
+	pkgs := make(map[string]*ast.Package)
+	var err os.Error
+	for _, filename := range filenames {
+		var src *ast.File
+		src, err = ParseFile(filename, nil, scope, mode)
+		if err == nil {
+			name := src.Name.Name()
+			pkg, found := pkgs[name]
+			if !found {
+				pkg = &ast.Package{name, scope, make(map[string]*ast.File)}
+				pkgs[name] = pkg
+			}
+			pkg.Files[filename] = src
+		}
+	}
+
+	return pkgs, err
+}
+
+
 // ParseDir calls ParseFile for the files in the directory specified by path and
 // returns a map of package name -> package AST with all the packages found. If
 // filter != nil, only the files with os.Dir entries passing through the filter
@@ -164,24 +193,17 @@ func ParseDir(path string, filter func(*os.Dir) bool, mode uint) (map[string]*as
 		return nil, err
 	}
 
-	var scope *ast.Scope = nil // for now tracking of declarations is disabled
-	pkgs := make(map[string]*ast.Package)
+	filenames := make([]string, len(list))
+	n := 0
 	for i := 0; i < len(list); i++ {
-		entry := &list[i]
-		if filter == nil || filter(entry) {
-			src, err := ParseFile(pathutil.Join(path, entry.Name), nil, scope, mode)
-			if err != nil {
-				return pkgs, err
-			}
-			name := src.Name.Name()
-			pkg, found := pkgs[name]
-			if !found {
-				pkg = &ast.Package{name, path, scope, make(map[string]*ast.File)}
-				pkgs[name] = pkg
-			}
-			pkg.Files[entry.Name] = src
+		d := &list[i]
+		if filter == nil || filter(d) {
+			filenames[n] = pathutil.Join(path, d.Name)
+			n++
 		}
 	}
+	filenames = filenames[0:n]
 
-	return pkgs, nil
+	var scope *ast.Scope = nil // for now tracking of declarations is disabled
+	return ParseFiles(filenames, scope, mode)
 }