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https://github.com/golang/go
synced 2024-11-22 00:14:42 -07:00
godoc: report error for directories with multiple packages
Fixes #3922. R=rsc, adg CC=golang-dev https://golang.org/cl/6453094
This commit is contained in:
Robert Griesemer
parent
f087764abc
commit
f597fa67c1
@ -21,9 +21,6 @@
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{{if $.Examples}}
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<dd><a href="#pkg-examples">Examples</a></dd>
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{{end}}
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{{if $.PList}}
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<dd><a href="#pkg-other-packages">Other packages</a></dd>
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{{end}}
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{{if $.Dirs}}
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<dd><a href="#pkg-subdirectories">Subdirectories</a></dd>
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{{end}}
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@ -167,16 +164,6 @@
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<pre>{{node_html . $.FSet}}</pre>
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{{end}}
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{{with .PList}}
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<h2 id="pkg-other-packages">Other packages</h2>
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<p>
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{{/* PList entries are strings - no need for FSet */}}
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{{range .}}
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<a href="?p={{urlquery .}}">{{html .}}</a><br />
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{{end}}
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</p>
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{{end}}
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{{with .Dirs}}
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{{/* DirList entries are numbers and strings - no need for FSet */}}
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{{if $.PDoc}}
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@ -65,15 +65,6 @@ BUGS
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---------------------------------------
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*/}}{{with .PList}}
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OTHER PACKAGES
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{{range .}}
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{{.}}{{end}}
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{{end}}{{/*
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---------------------------------------
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*/}}{{with .Dirs}}
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SUBDIRECTORIES
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{{if $.DirFlat}}{{range .List}}{{if .HasPkg}}
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@ -810,7 +810,6 @@ func remoteSearchURL(query string, html bool) string {
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type PageInfo struct {
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Dirname string // directory containing the package
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PList []string // list of package names found
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FSet *token.FileSet // corresponding file set
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PAst *ast.File // nil if no single AST with package exports
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PDoc *doc.Package // nil if no single package documentation
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@ -876,27 +875,24 @@ func packageExports(fset *token.FileSet, pkg *ast.Package) {
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// directories, PageInfo.Dirs is nil. If a directory read error occurred,
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// PageInfo.Err is set to the respective error but the error is not logged.
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//
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func (h *docServer) getPageInfo(abspath, relpath, pkgname string, mode PageInfoMode) PageInfo {
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func (h *docServer) getPageInfo(abspath, relpath string, mode PageInfoMode) PageInfo {
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var pkgFiles []string
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// If we're showing the default package, restrict to the ones
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// Restrict to the package files
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// that would be used when building the package on this
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// system. This makes sure that if there are separate
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// implementations for, say, Windows vs Unix, we don't
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// jumble them all together.
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if pkgname == "" {
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// Note: Uses current binary's GOOS/GOARCH.
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// To use different pair, such as if we allowed the user
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// to choose, set ctxt.GOOS and ctxt.GOARCH before
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// calling ctxt.ScanDir.
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ctxt := build.Default
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ctxt.IsAbsPath = pathpkg.IsAbs
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ctxt.ReadDir = fsReadDir
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ctxt.OpenFile = fsOpenFile
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dir, err := ctxt.ImportDir(abspath, 0)
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if err == nil {
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pkgFiles = append(dir.GoFiles, dir.CgoFiles...)
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}
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// Note: Uses current binary's GOOS/GOARCH.
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// To use different pair, such as if we allowed the user
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// to choose, set ctxt.GOOS and ctxt.GOARCH before
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// calling ctxt.ScanDir.
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ctxt := build.Default
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ctxt.IsAbsPath = pathpkg.IsAbs
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ctxt.ReadDir = fsReadDir
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ctxt.OpenFile = fsOpenFile
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if dir, err := ctxt.ImportDir(abspath, 0); err == nil {
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pkgFiles = append(dir.GoFiles, dir.CgoFiles...)
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}
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// filter function to select the desired .go files
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@ -917,15 +913,12 @@ func (h *docServer) getPageInfo(abspath, relpath, pkgname string, mode PageInfoM
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// get package ASTs
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fset := token.NewFileSet()
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pkgs, err := parseDir(fset, abspath, filter)
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if err != nil && pkgs == nil {
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// only report directory read errors, ignore parse errors
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// (may be able to extract partial package information)
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if err != nil {
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return PageInfo{Dirname: abspath, Err: err}
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}
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// select package
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var pkg *ast.Package // selected package
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var plist []string // list of other package (names), if any
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if len(pkgs) == 1 {
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// Exactly one package - select it.
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for _, p := range pkgs {
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@ -933,49 +926,18 @@ func (h *docServer) getPageInfo(abspath, relpath, pkgname string, mode PageInfoM
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}
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} else if len(pkgs) > 1 {
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// Multiple packages - select the best matching package: The
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// 1st choice is the package with pkgname, the 2nd choice is
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// the package with dirname, and the 3rd choice is a package
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// that is not called "main" if there is exactly one such
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// package. Otherwise, don't select a package.
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dirpath, dirname := pathpkg.Split(abspath)
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// If the dirname is "go" we might be in a sub-directory for
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// .go files - use the outer directory name instead for better
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// results.
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if dirname == "go" {
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_, dirname = pathpkg.Split(pathpkg.Clean(dirpath))
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}
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var choice3 *ast.Package
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loop:
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// More than one package - report an error.
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var buf bytes.Buffer
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for _, p := range pkgs {
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switch {
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case p.Name == pkgname:
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pkg = p
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break loop // 1st choice; we are done
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case p.Name == dirname:
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pkg = p // 2nd choice
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case p.Name != "main":
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choice3 = p
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if buf.Len() > 0 {
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fmt.Fprintf(&buf, ", ")
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}
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fmt.Fprintf(&buf, p.Name)
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}
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if pkg == nil && len(pkgs) == 2 {
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pkg = choice3
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return PageInfo{
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Dirname: abspath,
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Err: fmt.Errorf("%s contains more than one package: %s", abspath, buf.Bytes()),
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}
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// Compute the list of other packages
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// (excluding the selected package, if any).
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plist = make([]string, len(pkgs))
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i := 0
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for name := range pkgs {
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if pkg == nil || name != pkg.Name {
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plist[i] = name
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i++
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}
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}
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plist = plist[0:i]
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sort.Strings(plist)
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}
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// get examples from *_test.go files
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@ -1041,7 +1003,6 @@ func (h *docServer) getPageInfo(abspath, relpath, pkgname string, mode PageInfoM
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return PageInfo{
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Dirname: abspath,
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PList: plist,
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FSet: fset,
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PAst: past,
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PDoc: pdoc,
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@ -1065,7 +1026,7 @@ func (h *docServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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if relpath == builtinPkgPath {
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mode = noFiltering
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}
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info := h.getPageInfo(abspath, relpath, r.FormValue("p"), mode)
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info := h.getPageInfo(abspath, relpath, mode)
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if info.Err != nil {
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log.Print(info.Err)
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serveError(w, r, relpath, info.Err)
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@ -373,13 +373,11 @@ func main() {
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}
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mode |= showSource
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}
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// TODO(gri): Provide a mechanism (flag?) to select a package
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// if there are multiple packages in a directory.
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// first, try as package unless forced as command
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var info PageInfo
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if !forceCmd {
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info = pkgHandler.getPageInfo(abspath, relpath, "", mode)
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info = pkgHandler.getPageInfo(abspath, relpath, mode)
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}
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// second, try as command unless the path is absolute
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@ -387,7 +385,7 @@ func main() {
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var cinfo PageInfo
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if !filepath.IsAbs(path) {
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abspath = pathpkg.Join(cmdHandler.fsRoot, path)
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cinfo = cmdHandler.getPageInfo(abspath, relpath, "", mode)
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cinfo = cmdHandler.getPageInfo(abspath, relpath, mode)
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}
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// determine what to use
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