devtools/hackdoc/markdown.go

package main

import (
	"fmt"
	"html/template"
	"net/http"
	"strings"

	"code.hackerspace.pl/hscloud/devtools/hackdoc/config"
	"code.hackerspace.pl/hscloud/devtools/hackdoc/source"

	"github.com/golang/glog"
	"gopkg.in/russross/blackfriday.v2"
)

func (s *service) handleMarkdown(w http.ResponseWriter, r *http.Request, src source.Source, branch, path string, cfg *config.Config) {
	data, err := src.ReadFile(path)
	if err != nil {
		glog.Errorf("ReadFile(%q): %w", err)
		handle500(w, r)
		return
	}

	rendered := blackfriday.Run([]byte(data))

	logRequest(w, r, "serving markdown at %s, cfg %+v", path, cfg)

	// TODO(q3k): allow markdown files to override which template to load
	tmpl, ok := cfg.Templates["default"]
	if !ok {
		glog.Errorf("No default template found for %s", path)
		// TODO(q3k): implement fallback template
		w.Write(rendered)
		return
	}

	vars := map[string]interface{}{
		"Rendered":    template.HTML(rendered),
		"Title":       path,
		"Path":        path,
		"PathInDepot": strings.TrimPrefix(path, "//"),
		"HackdocURL":  flagHackdocURL,
		"GitwebURL":   fmt.Sprintf(flagGitwebURLPattern, flagGitwebDefaultBranch, strings.TrimPrefix(path, "//")),
	}
	err = tmpl.Execute(w, vars)
	if err != nil {
		glog.Errorf("Could not execute template for %s: %v", err)
	}
}