Esempio n. 1
0
// contents reads and returns the content of the named file
// (from the virtual file system, so for example /doc refers to $GOROOT/doc).
func (c *Corpus) contents(name string) string {
	file, err := vfs.ReadFile(c.fs, name)
	if err != nil {
		log.Panic(err)
	}
	return string(file)
}
Esempio n. 2
0
func (c *Corpus) parseFile(fset *token.FileSet, filename string, mode parser.Mode) (*ast.File, error) {
	src, err := vfs.ReadFile(c.fs, filename)
	if err != nil {
		return nil, err
	}

	// Temporary ad-hoc fix for issue 5247.
	// TODO(gri) Remove this in favor of a better fix, eventually (see issue 7702).
	replaceLinePrefixCommentsWithBlankLine(src)

	return parser.ParseFile(fset, filename, src, mode)
}
Esempio n. 3
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func (p *Presentation) ServeHTMLDoc(w http.ResponseWriter, r *http.Request, abspath, relpath string) {
	// get HTML body contents
	src, err := vfs.ReadFile(p.Corpus.fs, abspath)
	if err != nil {
		log.Printf("ReadFile: %s", err)
		p.ServeError(w, r, relpath, err)
		return
	}

	// if it begins with "<!DOCTYPE " assume it is standalone
	// html that doesn't need the template wrapping.
	if bytes.HasPrefix(src, doctype) {
		w.Write(src)
		return
	}

	// if it begins with a JSON blob, read in the metadata.
	meta, src, err := extractMetadata(src)
	if err != nil {
		log.Printf("decoding metadata %s: %v", relpath, err)
	}

	// evaluate as template if indicated
	if meta.Template {
		tmpl, err := template.New("main").Funcs(p.TemplateFuncs()).Parse(string(src))
		if err != nil {
			log.Printf("parsing template %s: %v", relpath, err)
			p.ServeError(w, r, relpath, err)
			return
		}
		var buf bytes.Buffer
		if err := tmpl.Execute(&buf, nil); err != nil {
			log.Printf("executing template %s: %v", relpath, err)
			p.ServeError(w, r, relpath, err)
			return
		}
		src = buf.Bytes()
	}

	// if it's the language spec, add tags to EBNF productions
	if strings.HasSuffix(abspath, "go_spec.html") {
		var buf bytes.Buffer
		Linkify(&buf, src)
		src = buf.Bytes()
	}

	p.ServePage(w, Page{
		Title:    meta.Title,
		Subtitle: meta.Subtitle,
		Body:     src,
	})
}
Esempio n. 4
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func (p *Presentation) serveTextFile(w http.ResponseWriter, r *http.Request, abspath, relpath, title string) {
	src, err := vfs.ReadFile(p.Corpus.fs, abspath)
	if err != nil {
		log.Printf("ReadFile: %s", err)
		p.ServeError(w, r, relpath, err)
		return
	}

	if r.FormValue("m") == "text" {
		p.ServeText(w, src)
		return
	}

	h := r.FormValue("h")
	s := RangeSelection(r.FormValue("s"))

	var buf bytes.Buffer
	if pathpkg.Ext(abspath) == ".go" {
		// Find markup links for this file (e.g. "/src/fmt/print.go").
		fi := p.Corpus.Analysis.FileInfo(abspath)
		buf.WriteString("<script type='text/javascript'>document.ANALYSIS_DATA = ")
		buf.Write(marshalJSON(fi.Data))
		buf.WriteString(";</script>\n")

		if status := p.Corpus.Analysis.Status(); status != "" {
			buf.WriteString("<a href='/lib/godoc/analysis/help.html'>Static analysis features</a> ")
			// TODO(adonovan): show analysis status at per-file granularity.
			fmt.Fprintf(&buf, "<span style='color: grey'>[%s]</span><br/>", htmlpkg.EscapeString(status))
		}

		buf.WriteString("<pre>")
		formatGoSource(&buf, src, fi.Links, h, s)
		buf.WriteString("</pre>")
	} else {
		buf.WriteString("<pre>")
		FormatText(&buf, src, 1, false, h, s)
		buf.WriteString("</pre>")
	}
	fmt.Fprintf(&buf, `<p><a href="/%s?m=text">View as plain text</a></p>`, htmlpkg.EscapeString(relpath))

	p.ServePage(w, Page{
		Title:    title + " " + relpath,
		Tabtitle: relpath,
		Body:     buf.Bytes(),
	})
}
Esempio n. 5
0
// UpdateMetadata scans $GOROOT/doc for HTML files, reads their metadata,
// and updates the DocMetadata map.
func (c *Corpus) updateMetadata() {
	metadata := make(map[string]*Metadata)
	var scan func(string) // scan is recursive
	scan = func(dir string) {
		fis, err := c.fs.ReadDir(dir)
		if err != nil {
			log.Println("updateMetadata:", err)
			return
		}
		for _, fi := range fis {
			name := pathpkg.Join(dir, fi.Name())
			if fi.IsDir() {
				scan(name) // recurse
				continue
			}
			if !strings.HasSuffix(name, ".html") {
				continue
			}
			// Extract metadata from the file.
			b, err := vfs.ReadFile(c.fs, name)
			if err != nil {
				log.Printf("updateMetadata %s: %v", name, err)
				continue
			}
			meta, _, err := extractMetadata(b)
			if err != nil {
				log.Printf("updateMetadata: %s: %v", name, err)
				continue
			}
			// Store relative filesystem path in Metadata.
			meta.filePath = name
			if meta.Path == "" {
				// If no Path, canonical path is actual path.
				meta.Path = meta.filePath
			}
			// Store under both paths.
			metadata[meta.Path] = &meta
			metadata[meta.filePath] = &meta
		}
	}
	scan("/doc")
	c.docMetadata.Set(metadata)
}
Esempio n. 6
0
// getPageInfo returns the PageInfo for a package directory abspath. If the
// parameter genAST is set, an AST containing only the package exports is
// computed (PageInfo.PAst), otherwise package documentation (PageInfo.Doc)
// is extracted from the AST. If there is no corresponding package in the
// directory, PageInfo.PAst and PageInfo.PDoc are nil. If there are no sub-
// directories, PageInfo.Dirs is nil. If an error occurred, PageInfo.Err is
// set to the respective error but the error is not logged.
//
func (h *handlerServer) GetPageInfo(abspath, relpath string, mode PageInfoMode) *PageInfo {
	info := &PageInfo{Dirname: abspath}

	// Restrict to the package files that would be used when building
	// the package on this system.  This makes sure that if there are
	// separate implementations for, say, Windows vs Unix, we don't
	// jumble them all together.
	// Note: Uses current binary's GOOS/GOARCH.
	// To use different pair, such as if we allowed the user to choose,
	// set ctxt.GOOS and ctxt.GOARCH before calling ctxt.ImportDir.
	ctxt := build.Default
	ctxt.IsAbsPath = pathpkg.IsAbs
	ctxt.ReadDir = func(dir string) ([]os.FileInfo, error) {
		f, err := h.c.fs.ReadDir(filepath.ToSlash(dir))
		filtered := make([]os.FileInfo, 0, len(f))
		for _, i := range f {
			if mode&NoFiltering != 0 || i.Name() != "internal" {
				filtered = append(filtered, i)
			}
		}
		return filtered, err
	}
	ctxt.OpenFile = func(name string) (r io.ReadCloser, err error) {
		data, err := vfs.ReadFile(h.c.fs, filepath.ToSlash(name))
		if err != nil {
			return nil, err
		}
		return ioutil.NopCloser(bytes.NewReader(data)), nil
	}

	pkginfo, err := ctxt.ImportDir(abspath, 0)
	// continue if there are no Go source files; we still want the directory info
	if _, nogo := err.(*build.NoGoError); err != nil && !nogo {
		info.Err = err
		return info
	}

	// collect package files
	pkgname := pkginfo.Name
	pkgfiles := append(pkginfo.GoFiles, pkginfo.CgoFiles...)
	if len(pkgfiles) == 0 {
		// Commands written in C have no .go files in the build.
		// Instead, documentation may be found in an ignored file.
		// The file may be ignored via an explicit +build ignore
		// constraint (recommended), or by defining the package
		// documentation (historic).
		pkgname = "main" // assume package main since pkginfo.Name == ""
		pkgfiles = pkginfo.IgnoredGoFiles
	}

	// get package information, if any
	if len(pkgfiles) > 0 {
		// build package AST
		fset := token.NewFileSet()
		files, err := h.c.parseFiles(fset, relpath, abspath, pkgfiles)
		if err != nil {
			info.Err = err
			return info
		}

		// ignore any errors - they are due to unresolved identifiers
		pkg, _ := ast.NewPackage(fset, files, poorMansImporter, nil)

		// extract package documentation
		info.FSet = fset
		if mode&ShowSource == 0 {
			// show extracted documentation
			var m doc.Mode
			if mode&NoFiltering != 0 {
				m |= doc.AllDecls
			}
			if mode&AllMethods != 0 {
				m |= doc.AllMethods
			}
			info.PDoc = doc.New(pkg, pathpkg.Clean(relpath), m) // no trailing '/' in importpath
			if mode&NoTypeAssoc != 0 {
				for _, t := range info.PDoc.Types {
					info.PDoc.Consts = append(info.PDoc.Consts, t.Consts...)
					info.PDoc.Vars = append(info.PDoc.Vars, t.Vars...)
					info.PDoc.Funcs = append(info.PDoc.Funcs, t.Funcs...)
					t.Consts = nil
					t.Vars = nil
					t.Funcs = nil
				}
				// for now we cannot easily sort consts and vars since
				// go/doc.Value doesn't export the order information
				sort.Sort(funcsByName(info.PDoc.Funcs))
			}

			// collect examples
			testfiles := append(pkginfo.TestGoFiles, pkginfo.XTestGoFiles...)
			files, err = h.c.parseFiles(fset, relpath, abspath, testfiles)
			if err != nil {
				log.Println("parsing examples:", err)
			}
			info.Examples = collectExamples(h.c, pkg, files)

			// collect any notes that we want to show
			if info.PDoc.Notes != nil {
				// could regexp.Compile only once per godoc, but probably not worth it
				if rx := h.p.NotesRx; rx != nil {
					for m, n := range info.PDoc.Notes {
						if rx.MatchString(m) {
							if info.Notes == nil {
								info.Notes = make(map[string][]*doc.Note)
							}
							info.Notes[m] = n
						}
					}
				}
			}

		} else {
			// show source code
			// TODO(gri) Consider eliminating export filtering in this mode,
			//           or perhaps eliminating the mode altogether.
			if mode&NoFiltering == 0 {
				packageExports(fset, pkg)
			}
			info.PAst = files
		}
		info.IsMain = pkgname == "main"
	}

	// get directory information, if any
	var dir *Directory
	var timestamp time.Time
	if tree, ts := h.c.fsTree.Get(); tree != nil && tree.(*Directory) != nil {
		// directory tree is present; lookup respective directory
		// (may still fail if the file system was updated and the
		// new directory tree has not yet been computed)
		dir = tree.(*Directory).lookup(abspath)
		timestamp = ts
	}
	if dir == nil {
		// no directory tree present (too early after startup or
		// command-line mode); compute one level for this page
		// note: cannot use path filter here because in general
		//       it doesn't contain the FSTree path
		dir = h.c.newDirectory(abspath, 1)
		timestamp = time.Now()
	}
	info.Dirs = dir.listing(true, func(path string) bool { return h.includePath(path, mode) })
	info.DirTime = timestamp
	info.DirFlat = mode&FlatDir != 0

	return info
}