Fix relative links in README markdown fails to resolve

Changes

1 changed files (+50/-8)

• routes/routes.go
  • @@ -1,11 +1,13 @@
    package routes import ( + "bytes" "compress/gzip" "fmt" "html/template" "log" "net/http" + "net/url" "os" "path/filepath" "sort"
  • @@ -115,6 +117,13 @@ log.Println(err)
    return } + mainBranch, err := gr.FindMainBranch(d.c.Repo.MainBranch) + if err != nil { + d.Write500(w) + log.Println(err) + return + } + var readmeContent template.HTML for _, readme := range d.c.Repo.Readme { ext := filepath.Ext(readme)
  • @@ -122,8 +131,48 @@ content, _ := gr.FileContent(readme)
    if len(content) > 0 { switch ext { case ".md", ".mkd", ".markdown": + parser := blackfriday.New(blackfriday.WithExtensions(blackfriday.CommonExtensions)) + tree := parser.Parse([]byte(content)) + tree.Walk(func(node *blackfriday.Node, entering bool) blackfriday.WalkStatus { + if !entering { + return blackfriday.GoToNext + } + + if node.Type == blackfriday.Link { + href := string(node.LinkData.Destination) + parsedURL, err := url.Parse(href) + if err == nil && parsedURL.Host != "" { + // Full URL, skip. + return blackfriday.GoToNext + } + + if strings.IndexByte(href, '/') == 0 { + // Repository index page is the "root" for repository's README file. + href = "." + href + } + + if strings.LastIndexByte(href, '/') == len(href)-1 { + node.LinkData.Destination = fmt.Appendf([]byte{}, "/%s/tree/%s/%s", name, mainBranch, href) + node.LinkData.Destination = node.LinkData.Destination[:len(node.LinkData.Destination)-1] + } else { + node.LinkData.Destination = fmt.Appendf([]byte{}, "/%s/blob/%s/%s", name, mainBranch, href) + } + + } + + return blackfriday.GoToNext + }) + + var writer bytes.Buffer + renderer := blackfriday.NewHTMLRenderer(blackfriday.HTMLRendererParameters{}) + renderer.RenderHeader(&writer, tree) + tree.Walk(func(node *blackfriday.Node, entering bool) blackfriday.WalkStatus { + return renderer.RenderNode(&writer, node, entering) + }) + renderer.RenderFooter(&writer, tree) + unsafe := blackfriday.Run( - []byte(content), + writer.Bytes(), blackfriday.WithExtensions(blackfriday.CommonExtensions), ) html := bluemonday.UGCPolicy().SanitizeBytes(unsafe)
  • @@ -140,13 +189,6 @@ }
    if readmeContent == "" { log.Printf("no readme found for %s", name) - } - - mainBranch, err := gr.FindMainBranch(d.c.Repo.MainBranch) - if err != nil { - d.Write500(w) - log.Println(err) - return } tpath := filepath.Join(d.c.Dirs.Templates, "*")