tools: Index | Files | Directories

package godoc

import ""

Package godoc is a work-in-progress (2013-07-17) package to begin splitting up the godoc binary into multiple pieces.

This package comment will evolve over time as this package splits into smaller pieces.


Package Files

corpus.go dirtrees.go format.go godoc.go index.go linkify.go meta.go page.go parser.go pres.go search.go server.go snippet.go spec.go spot.go tab.go template.go versions.go


var ErrFileIndexVersion = errors.New("file index version out of date")

func FormatSelections Uses

func FormatSelections(w io.Writer, text []byte, lw LinkWriter, links Selection, sw SegmentWriter, selections ...Selection)

FormatSelections takes a text and writes it to w using link and segment writers lw and sw as follows: lw is invoked for consecutive segment starts and ends as specified through the links selection, and sw is invoked for consecutive segments of text overlapped by the same selections as specified by selections. The link writer lw may be nil, in which case the links Selection is ignored.

func FormatText Uses

func FormatText(w io.Writer, text []byte, line int, goSource bool, pattern string, selection Selection)

FormatText HTML-escapes text and writes it to w. Consecutive text segments are wrapped in HTML spans (with tags as defined by startTags and endTag) as follows:

- if line >= 0, line number (ln) spans are inserted before each line,
  starting with the value of line
- if the text is Go source, comments get the "comment" span class
- each occurrence of the regular expression pattern gets the "highlight"
  span class
- text segments covered by selection get the "selection" span class

Comments, highlights, and selections may overlap arbitrarily; the respective HTML span classes are specified in the startTags variable.

func Linkify Uses

func Linkify(out io.Writer, src []byte)

func LinkifyText Uses

func LinkifyText(w io.Writer, text []byte, n ast.Node)

LinkifyText HTML-escapes source text and writes it to w. Identifiers that are in a "use" position (i.e., that are not being declared), are wrapped with HTML links pointing to the respective declaration, if possible. Comments are formatted the same way as with FormatText.

type AltWords Uses

type AltWords struct {
    Canon string   // canonical word spelling (all lowercase)
    Alts  []string // alternative spelling for the same word

An AltWords describes a list of alternative spellings for a canonical (all lowercase) spelling of a word.

type Corpus Uses

type Corpus struct {

    // Verbose logging.
    Verbose bool

    // IndexEnabled controls whether indexing is enabled.
    IndexEnabled bool

    // IndexFiles specifies a glob pattern specifying index files.
    // If not empty, the index is read from these files in sorted
    // order.
    IndexFiles string

    // IndexThrottle specifies the indexing throttle value
    // between 0.0 and 1.0. At 0.0, the indexer always sleeps.
    // At 1.0, the indexer never sleeps. Because 0.0 is useless
    // and redundant with setting IndexEnabled to false, the
    // zero value for IndexThrottle means 0.9.
    IndexThrottle float64

    // IndexInterval specifies the time to sleep between reindexing
    // all the sources.
    // If zero, a default is used. If negative, the index is only
    // built once.
    IndexInterval time.Duration

    // IndexDocs enables indexing of Go documentation.
    // This will produce search results for exported types, functions,
    // methods, variables, and constants, and will link to the godoc
    // documentation for those identifiers.
    IndexDocs bool

    // IndexGoCode enables indexing of Go source code.
    // This will produce search results for internal and external identifiers
    // and will link to both declarations and uses of those identifiers in
    // source code.
    IndexGoCode bool

    // IndexFullText enables full-text indexing.
    // This will provide search results for any matching text in any file that
    // is indexed, including non-Go files (see whitelisted in index.go).
    // Regexp searching is supported via full-text indexing.
    IndexFullText bool

    // MaxResults optionally specifies the maximum results for indexing.
    MaxResults int

    // SummarizePackage optionally specifies a function to
    // summarize a package. It exists as an optimization to
    // avoid reading files to parse package comments.
    // If SummarizePackage returns false for ok, the caller
    // ignores all return values and parses the files in the package
    // as if SummarizePackage were nil.
    // If showList is false, the package is hidden from the
    // package listing.
    SummarizePackage func(pkg string) (summary string, showList, ok bool)

    // IndexDirectory optionally specifies a function to determine
    // whether the provided directory should be indexed.  The dir
    // will be of the form "/src/cmd/6a", "/doc/play",
    // "/src/io", etc.
    // If nil, all directories are indexed if indexing is enabled.
    IndexDirectory func(dir string) bool

    // Analysis is the result of type and pointer analysis.
    Analysis analysis.Result
    // contains filtered or unexported fields

A Corpus holds all the state related to serving and indexing a collection of Go code.

Construct a new Corpus with NewCorpus, then modify options, then call its Init method.

func NewCorpus Uses

func NewCorpus(fs vfs.FileSystem) *Corpus

NewCorpus returns a new Corpus from a filesystem. The returned corpus has all indexing enabled and MaxResults set to 1000. Change or set any options on Corpus before calling the Corpus.Init method.

func (*Corpus) CurrentIndex Uses

func (c *Corpus) CurrentIndex() (*Index, time.Time)

func (*Corpus) FSModifiedTime Uses

func (c *Corpus) FSModifiedTime() time.Time

func (*Corpus) Init Uses

func (c *Corpus) Init() error

Init initializes Corpus, once options on Corpus are set. It must be called before any subsequent method calls.

func (*Corpus) InitVersionInfo Uses

func (c *Corpus) InitVersionInfo()

InitVersionInfo parses the $GOROOT/api/go*.txt API definition files to discover which API features were added in which Go releases.

func (*Corpus) Lookup Uses

func (c *Corpus) Lookup(query string) SearchResult

func (*Corpus) MetadataFor Uses

func (c *Corpus) MetadataFor(relpath string) *Metadata

MetadataFor returns the *Metadata for a given relative path or nil if none exists.

func (*Corpus) NewIndex Uses

func (c *Corpus) NewIndex() *Index

NewIndex creates a new index for the .go files provided by the corpus.

func (*Corpus) ReadIndexFrom Uses

func (c *Corpus) ReadIndexFrom(r io.Reader) error

ReadIndexFrom sets the current index from the serialized version found in r.

func (*Corpus) RunIndexer Uses

func (c *Corpus) RunIndexer()

RunIndexer runs forever, indexing.

func (*Corpus) UpdateIndex Uses

func (c *Corpus) UpdateIndex()

type DirEntry Uses

type DirEntry struct {
    Depth    int          // >= 0
    Height   int          // = DirList.MaxHeight - Depth, > 0
    Path     string       // directory path; includes Name, relative to DirList root
    Name     string       // directory name
    HasPkg   bool         // true if the directory contains at least one package
    Synopsis string       // package documentation, if any
    RootType vfs.RootType // root type of the filesystem containing the direntry

DirEntry describes a directory entry. The Depth and Height values are useful for presenting an entry in an indented fashion.

type DirList Uses

type DirList struct {
    MaxHeight int // directory tree height, > 0
    List      []DirEntry

type Directory Uses

type Directory struct {
    Depth    int
    Path     string       // directory path; includes Name
    Name     string       // directory name
    HasPkg   bool         // true if the directory contains at least one package
    Synopsis string       // package documentation, if any
    RootType vfs.RootType // root type of the filesystem containing the directory
    Dirs     []*Directory // subdirectories

type File Uses

type File struct {
    Name string // directory-local file name
    Pak  *Pak   // the package to which the file belongs

A File describes a Go file.

func (*File) Path Uses

func (f *File) Path() string

Path returns the file path of f.

type FileLines Uses

type FileLines struct {
    Filename string
    Lines    []int

A FileLines value specifies a file and line numbers within that file.

type FileRun Uses

type FileRun struct {
    File   *File
    Groups []KindRun

A FileRun is a list of KindRuns belonging to the same file.

type HitList Uses

type HitList []*PakRun

A HitList describes a list of PakRuns.

type Ident Uses

type Ident struct {
    Path    string // e.g. "net/http"
    Package string // e.g. "http"
    Name    string // e.g. "NewRequest"
    Doc     string // e.g. "NewRequest returns a new Request..."

Ident stores information about external identifiers in order to create links to package documentation.

type Index Uses

type Index struct {
    // contains filtered or unexported fields

func (*Index) CompatibleWith Uses

func (x *Index) CompatibleWith(c *Corpus) bool

CompatibleWith reports whether the Index x is compatible with the corpus indexing options set in c.

func (*Index) Exports Uses

func (x *Index) Exports() map[string]map[string]SpotKind

Exports returns a map from full package path to exported symbol name to its type.

func (*Index) Idents Uses

func (x *Index) Idents() map[SpotKind]map[string][]Ident

Idents returns a map from identifier type to exported symbol name to the list of identifiers matching that name.

func (*Index) ImportCount Uses

func (x *Index) ImportCount() map[string]int

ImportCount returns a map from import paths to how many times they were seen.

func (*Index) Lookup Uses

func (x *Index) Lookup(query string) (*SearchResult, error)

For a given query, which is either a single identifier or a qualified identifier, Lookup returns a SearchResult containing packages, a LookupResult, a list of alternative spellings, and identifiers, if any. Any and all results may be nil. If the query syntax is wrong, an error is reported.

func (*Index) LookupRegexp Uses

func (x *Index) LookupRegexp(r *regexp.Regexp, n int) (found int, result []FileLines)

LookupRegexp returns the number of matches and the matches where a regular expression r is found in the full text index. At most n matches are returned (thus found <= n).

func (*Index) PackagePath Uses

func (x *Index) PackagePath() map[string]map[string]bool

PackagePath returns a map from short package name to a set of full package path names that use that short package name.

func (*Index) ReadFrom Uses

func (x *Index) ReadFrom(r io.Reader) (n int64, err error)

ReadFrom reads the index from r into x; x must not be nil. If r does not also implement io.ByteReader, it will be wrapped in a bufio.Reader. If the index is from an old version, the error is ErrFileIndexVersion.

func (*Index) Snippet Uses

func (x *Index) Snippet(i int) *Snippet

func (*Index) Stats Uses

func (x *Index) Stats() Statistics

Stats returns index statistics.

func (*Index) WriteTo Uses

func (x *Index) WriteTo(w io.Writer) (n int64, err error)

WriteTo writes the index x to w.

type IndexResult Uses

type IndexResult struct {
    Decls  RunList // package-level declarations (with snippets)
    Others RunList // all other occurrences

type Indexer Uses

type Indexer struct {
    // contains filtered or unexported fields

An Indexer maintains the data structures and provides the machinery for indexing .go files under a file tree. It implements the path.Visitor interface for walking file trees, and the ast.Visitor interface for walking Go ASTs.

func (*Indexer) Visit Uses

func (x *Indexer) Visit(node ast.Node) ast.Visitor

type KindRun Uses

type KindRun []SpotInfo

A KindRun is a run of SpotInfos of the same kind in a given file. The kind (3 bits) is stored in each SpotInfo element; to find the kind of a KindRun, look at any of its elements.

func (KindRun) Len Uses

func (k KindRun) Len() int

KindRuns are sorted by line number or index. Since the isIndex bit is always the same for all infos in one list we can compare lori's.

func (KindRun) Less Uses

func (k KindRun) Less(i, j int) bool

func (KindRun) Swap Uses

func (k KindRun) Swap(i, j int)

type LinkWriter Uses

type LinkWriter func(w io.Writer, offs int, start bool)

A LinkWriter writes some start or end "tag" to w for the text offset offs. It is called by FormatSelections at the start or end of each link segment.

type LookupResult Uses

type LookupResult struct {
    Decls  HitList // package-level declarations (with snippets)
    Others HitList // all other occurrences

type Metadata Uses

type Metadata struct {
    Title    string
    Subtitle string
    Template bool   // execute as template
    Path     string // canonical path for this page
    // contains filtered or unexported fields

TODO(adg): why are some exported and some aren't? -brad

func (*Metadata) FilePath Uses

func (m *Metadata) FilePath() string

type Page Uses

type Page struct {
    Title    string
    Tabtitle string
    Subtitle string
    SrcPath  string
    Query    string
    Body     []byte
    GoogleCN bool // page is being served from
    TreeView bool // page needs to contain treeview related js and css

    // filled in by ServePage
    SearchBox       bool
    Playground      bool
    Version         string
    GoogleAnalytics string

Page describes the contents of the top-level godoc webpage.

type PageInfo Uses

type PageInfo struct {
    Dirname  string // directory containing the package
    Err      error  // error or nil
    GoogleCN bool   // page is being served from

    Mode PageInfoMode // display metadata from query string

    // package info
    FSet       *token.FileSet         // nil if no package documentation
    PDoc       *doc.Package           // nil if no package documentation
    Examples   []*doc.Example         // nil if no example code
    Notes      map[string][]*doc.Note // nil if no package Notes
    PAst       map[string]*ast.File   // nil if no AST with package exports
    IsMain     bool                   // true for package main
    IsFiltered bool                   // true if results were filtered

    // analysis info
    TypeInfoIndex  map[string]int  // index of JSON datum for type T (if -analysis=type)
    AnalysisData   htmltemplate.JS // array of TypeInfoJSON values
    CallGraph      htmltemplate.JS // array of PCGNodeJSON values    (if -analysis=pointer)
    CallGraphIndex map[string]int  // maps func name to index in CallGraph

    // directory info
    Dirs    *DirList  // nil if no directory information
    DirTime time.Time // directory time stamp
    DirFlat bool      // if set, show directory in a flat (non-indented) manner

func (*PageInfo) IsEmpty Uses

func (info *PageInfo) IsEmpty() bool

type PageInfoMode Uses

type PageInfoMode uint
const (
    PageInfoModeQueryString = "m" // query string where PageInfoMode is stored

    NoFiltering PageInfoMode = 1 << iota // do not filter exports
    AllMethods                           // show all embedded methods
    ShowSource                           // show source code, do not extract documentation
    FlatDir                              // show directory in a flat (non-indented) manner
    NoTypeAssoc                          // don't associate consts, vars, and factory functions with types (not exposed via ?m= query parameter, used for package builtin, see issue 6645)

type Pak Uses

type Pak struct {
    Path string // path of directory containing the package
    Name string // package name as declared by package clause

A Pak describes a Go package.

type PakRun Uses

type PakRun struct {
    Pak   *Pak
    Files []*FileRun

A PakRun describes a run of *FileRuns of a package.

func (*PakRun) Len Uses

func (p *PakRun) Len() int

Sorting support for files within a PakRun.

func (*PakRun) Less Uses

func (p *PakRun) Less(i, j int) bool

func (*PakRun) Swap Uses

func (p *PakRun) Swap(i, j int)

type Presentation Uses

type Presentation struct {
    Corpus *Corpus

    SearchDescXML *template.Template // If not nil, register a /opensearch.xml handler with this template.

    // TabWidth optionally specifies the tab width.
    TabWidth int

    ShowTimestamps bool
    ShowPlayground bool
    DeclLinks      bool

    // NotesRx optionally specifies a regexp to match
    // notes to render in the output.
    NotesRx *regexp.Regexp

    // AdjustPageInfoMode optionally specifies a function to
    // modify the PageInfoMode of a request. The default chosen
    // value is provided.
    AdjustPageInfoMode func(req *http.Request, mode PageInfoMode) PageInfoMode

    // URLForSrc optionally specifies a function that takes a source file and
    // returns a URL for it.
    // The source file argument has the form /src/<path>/<filename>.
    URLForSrc func(src string) string

    // URLForSrcPos optionally specifies a function to create a URL given a
    // source file, a line from the source file (1-based), and low & high offset
    // positions (0-based, bytes from beginning of file). Ideally, the returned
    // URL will be for the specified line of the file, while the high & low
    // positions will be used to highlight a section of the file.
    // The source file argument has the form /src/<path>/<filename>.
    URLForSrcPos func(src string, line, low, high int) string

    // URLForSrcQuery optionally specifies a function to create a URL given a
    // source file, a query string, and a line from the source file (1-based).
    // The source file argument has the form /src/<path>/<filename>.
    // The query argument will be escaped for the purposes of embedding in a URL
    // query parameter.
    // Ideally, the returned URL will be for the specified line of the file with
    // the query string highlighted.
    URLForSrcQuery func(src, query string, line int) string

    // SearchResults optionally specifies a list of functions returning an HTML
    // body for displaying search results.
    SearchResults []SearchResultFunc

    // GoogleAnalytics optionally adds Google Analytics via the provided
    // tracking ID to each page.
    GoogleAnalytics string
    // contains filtered or unexported fields

Presentation generates output from a corpus.

func NewPresentation Uses

func NewPresentation(c *Corpus) *Presentation

NewPresentation returns a new Presentation from a corpus. It sets SearchResults to: [SearchResultDoc SearchResultCode SearchResultTxt].

func (*Presentation) CmdFSRoot Uses

func (p *Presentation) CmdFSRoot() string

func (*Presentation) FileServer Uses

func (p *Presentation) FileServer() http.Handler

func (*Presentation) FuncMap Uses

func (p *Presentation) FuncMap() template.FuncMap

FuncMap defines template functions used in godoc templates.

Convention: template function names ending in "_html" or "_url" produce

HTML- or URL-escaped strings; all other function results may
require explicit escaping in the template.

func (*Presentation) GetCmdPageInfo Uses

func (p *Presentation) GetCmdPageInfo(abspath, relpath string, mode PageInfoMode) *PageInfo

TODO(bradfitz): move this to be a method on Corpus. Just moving code around for now, but this doesn't feel right.

func (*Presentation) GetPageInfoMode Uses

func (p *Presentation) GetPageInfoMode(r *http.Request) PageInfoMode

GetPageInfoMode computes the PageInfoMode flags by analyzing the request URL form value "m". It is value is a comma-separated list of mode names as defined by modeNames (e.g.: m=src,text).

func (*Presentation) GetPkgPageInfo Uses

func (p *Presentation) GetPkgPageInfo(abspath, relpath string, mode PageInfoMode) *PageInfo

TODO(bradfitz): move this to be a method on Corpus. Just moving code around for now, but this doesn't feel right.

func (*Presentation) HandleSearch Uses

func (p *Presentation) HandleSearch(w http.ResponseWriter, r *http.Request)

HandleSearch obtains results for the requested search and returns a page to display them.

func (*Presentation) NewSnippet Uses

func (p *Presentation) NewSnippet(fset *token.FileSet, decl ast.Decl, id *ast.Ident) *Snippet

NewSnippet creates a text snippet from a declaration decl containing an identifier id. Parts of the declaration not containing the identifier may be removed for a more compact snippet.

func (*Presentation) PkgFSRoot Uses

func (p *Presentation) PkgFSRoot() string

func (*Presentation) SearchResultCode Uses

func (p *Presentation) SearchResultCode(result SearchResult) []byte

SearchResultCode optionally specifies a function returning an HTML body displaying search results matching source code.

func (*Presentation) SearchResultDoc Uses

func (p *Presentation) SearchResultDoc(result SearchResult) []byte

SearchResultDoc optionally specifies a function returning an HTML body displaying search results matching godoc documentation.

func (*Presentation) SearchResultTxt Uses

func (p *Presentation) SearchResultTxt(result SearchResult) []byte

SearchResultTxt optionally specifies a function returning an HTML body displaying search results of textual matches.

func (*Presentation) ServeError Uses

func (p *Presentation) ServeError(w http.ResponseWriter, r *http.Request, relpath string, err error)

func (*Presentation) ServeFile Uses

func (p *Presentation) ServeFile(w http.ResponseWriter, r *http.Request)

func (*Presentation) ServeHTMLDoc Uses

func (p *Presentation) ServeHTMLDoc(w http.ResponseWriter, r *http.Request, abspath, relpath string)

func (*Presentation) ServeHTTP Uses

func (p *Presentation) ServeHTTP(w http.ResponseWriter, r *http.Request)

func (*Presentation) ServePage Uses

func (p *Presentation) ServePage(w http.ResponseWriter, page Page)

func (*Presentation) ServeText Uses

func (p *Presentation) ServeText(w http.ResponseWriter, text []byte)

func (*Presentation) TemplateFuncs Uses

func (p *Presentation) TemplateFuncs() template.FuncMap

func (*Presentation) WriteNode Uses

func (p *Presentation) WriteNode(w io.Writer, fset *token.FileSet, x interface{})

WriteNode writes x to w. TODO(bgarcia) Is this method needed? It's just a wrapper for p.writeNode.

type RunList Uses

type RunList []interface{}

A RunList is a list of entries that can be sorted according to some criteria. A RunList may be compressed by grouping "runs" of entries which are equal (according to the sort criteria) into a new RunList of runs. For instance, a RunList containing pairs (x, y) may be compressed into a RunList containing pair runs (x, {y}) where each run consists of a list of y's with the same x.

type SearchResult Uses

type SearchResult struct {
    Query string
    Alert string // error or warning message

    // identifier matches
    Pak HitList       // packages matching Query
    Hit *LookupResult // identifier matches of Query
    Alt *AltWords     // alternative identifiers to look for

    // textual matches
    Found    int         // number of textual occurrences found
    Textual  []FileLines // textual matches of Query
    Complete bool        // true if all textual occurrences of Query are reported
    Idents   map[SpotKind][]Ident

type SearchResultFunc Uses

type SearchResultFunc func(p *Presentation, result SearchResult) []byte

SearchResultFunc functions return an HTML body for displaying search results.

type Segment Uses

type Segment struct {
    // contains filtered or unexported fields

A Segment describes a text segment [start, end). The zero value of a Segment is a ready-to-use empty segment.

type SegmentWriter Uses

type SegmentWriter func(w io.Writer, text []byte, selections int)

A SegmentWriter formats a text according to selections and writes it to w. The selections parameter is a bit set indicating which selections provided to FormatSelections overlap with the text segment: If the n'th bit is set in selections, the n'th selection provided to FormatSelections is overlapping with the text.

type Selection Uses

type Selection func() Segment

A Selection is an "iterator" function returning a text segment. Repeated calls to a selection return consecutive, non-overlapping, non-empty segments, followed by an infinite sequence of empty segments. The first empty segment marks the end of the selection.

func RangeSelection Uses

func RangeSelection(str string) Selection

RangeSelection computes the Selection for a text range described by the argument str; the range description must match the selRx regular expression.

type Snippet Uses

type Snippet struct {
    Line int
    Text string // HTML-escaped

func NewSnippet Uses

func NewSnippet(fset *token.FileSet, decl ast.Decl, id *ast.Ident) *Snippet

NewSnippet creates a text snippet from a declaration decl containing an identifier id. Parts of the declaration not containing the identifier may be removed for a more compact snippet.

type Spot Uses

type Spot struct {
    File *File
    Info SpotInfo

A Spot describes a single occurrence of a word.

type SpotInfo Uses

type SpotInfo uint32

A SpotInfo value describes a particular identifier spot in a given file; It encodes three values: the SpotKind (declaration or use), a line or snippet index "lori", and whether it's a line or index.

The following encoding is used:

bits    32   4    1       0
value    [lori|kind|isIndex]

func (SpotInfo) IsIndex Uses

func (x SpotInfo) IsIndex() bool

func (SpotInfo) Kind Uses

func (x SpotInfo) Kind() SpotKind

func (SpotInfo) Lori Uses

func (x SpotInfo) Lori() int

type SpotKind Uses

type SpotKind uint32

SpotKind describes whether an identifier is declared (and what kind of declaration) or used.

const (
    PackageClause SpotKind = iota

func (SpotKind) Name Uses

func (x SpotKind) Name() string

type Statistics Uses

type Statistics struct {
    Bytes int // total size of indexed source files
    Files int // number of indexed source files
    Lines int // number of lines (all files)
    Words int // number of different identifiers
    Spots int // number of identifier occurrences

Statistics provides statistics information for an index.


analysisPackage analysis performs type and pointer analysis and generates mark-up for the Go source view.
golangorgenvPackage golangorgenv provides environment information for programs running at and its subdomains.
redirectPackage redirect provides hooks to register HTTP handlers that redirect old godoc paths to their new equivalents and assist in accessing the issue tracker, wiki, code review system, etc.
staticPackage static exports a map of static file content that supports the godoc user interface.
utilPackage util contains utility types and functions for godoc.
vfsPackage vfs defines types for abstract file system access and provides an implementation accessing the file system of the underlying OS.
vfs/gatefsPackage gatefs provides an implementation of the FileSystem interface that wraps another FileSystem and limits its concurrency.
vfs/httpfsPackage httpfs implements http.FileSystem using a godoc vfs.FileSystem.
vfs/mapfsPackage mapfs file provides an implementation of the FileSystem interface based on the contents of a map[string]string.
vfs/zipfsPackage zipfs file provides an implementation of the FileSystem interface based on the contents of a .zip file.

Package godoc imports 40 packages (graph) and is imported by 30 packages. Updated 2020-11-23. Refresh now. Tools for package owners.

The go get command cannot install this package because of the following issues: