forked from gitea/gitea
114 lines
3.0 KiB
Go
114 lines
3.0 KiB
Go
// Copyright 2017 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package external
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import (
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"os/exec"
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"runtime"
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"strings"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/markup"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/util"
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)
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// RegisterRenderers registers all supported third part renderers according settings
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func RegisterRenderers() {
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for _, renderer := range setting.ExternalMarkupRenderers {
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if renderer.Enabled && renderer.Command != "" && len(renderer.FileExtensions) > 0 {
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markup.RegisterRenderer(&Renderer{renderer})
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}
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}
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}
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// Renderer implements markup.Renderer for external tools
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type Renderer struct {
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*setting.MarkupRenderer
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}
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// Name returns the external tool name
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func (p *Renderer) Name() string {
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return p.MarkupName
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}
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// NeedPostProcess implements markup.Renderer
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func (p *Renderer) NeedPostProcess() bool {
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return p.MarkupRenderer.NeedPostProcess
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}
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// Extensions returns the supported extensions of the tool
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func (p *Renderer) Extensions() []string {
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return p.FileExtensions
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}
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// SanitizerRules implements markup.Renderer
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func (p *Renderer) SanitizerRules() []setting.MarkupSanitizerRule {
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return p.MarkupSanitizerRules
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}
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func envMark(envName string) string {
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if runtime.GOOS == "windows" {
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return "%" + envName + "%"
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}
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return "$" + envName
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}
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// Render renders the data of the document to HTML via the external tool.
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func (p *Renderer) Render(ctx *markup.RenderContext, input io.Reader, output io.Writer) error {
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var (
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urlRawPrefix = strings.Replace(ctx.URLPrefix, "/src/", "/raw/", 1)
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command = strings.NewReplacer(envMark("GITEA_PREFIX_SRC"), ctx.URLPrefix,
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envMark("GITEA_PREFIX_RAW"), urlRawPrefix).Replace(p.Command)
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commands = strings.Fields(command)
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args = commands[1:]
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)
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if p.IsInputFile {
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// write to temp file
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f, err := ioutil.TempFile("", "gitea_input")
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if err != nil {
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return fmt.Errorf("%s create temp file when rendering %s failed: %v", p.Name(), p.Command, err)
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}
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tmpPath := f.Name()
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defer func() {
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if err := util.Remove(tmpPath); err != nil {
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log.Warn("Unable to remove temporary file: %s: Error: %v", tmpPath, err)
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}
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}()
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_, err = io.Copy(f, input)
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if err != nil {
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f.Close()
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return fmt.Errorf("%s write data to temp file when rendering %s failed: %v", p.Name(), p.Command, err)
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}
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err = f.Close()
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if err != nil {
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return fmt.Errorf("%s close temp file when rendering %s failed: %v", p.Name(), p.Command, err)
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}
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args = append(args, f.Name())
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}
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cmd := exec.Command(commands[0], args...)
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cmd.Env = append(
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os.Environ(),
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"GITEA_PREFIX_SRC="+ctx.URLPrefix,
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"GITEA_PREFIX_RAW="+urlRawPrefix,
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)
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if !p.IsInputFile {
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cmd.Stdin = input
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}
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cmd.Stdout = output
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if err := cmd.Run(); err != nil {
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return fmt.Errorf("%s render run command %s %v failed: %v", p.Name(), commands[0], args, err)
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}
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return nil
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}
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