mirror of
https://github.com/go-gitea/gitea.git
synced 2025-10-27 01:24:54 +01:00
135 lines
3.7 KiB
Go
135 lines
3.7 KiB
Go
// Copyright 2017 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package external
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import (
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"bytes"
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"fmt"
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"io"
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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/markup"
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"code.gitea.io/gitea/modules/process"
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"code.gitea.io/gitea/modules/setting"
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"github.com/kballard/go-shellquote"
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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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var (
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_ markup.PostProcessRenderer = (*Renderer)(nil)
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_ markup.ExternalRenderer = (*Renderer)(nil)
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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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// SanitizerDisabled disabled sanitize if return true
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func (p *Renderer) SanitizerDisabled() bool {
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return p.RenderContentMode == setting.RenderContentModeNoSanitizer || p.RenderContentMode == setting.RenderContentModeIframe
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}
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// DisplayInIFrame represents whether render the content with an iframe
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func (p *Renderer) DisplayInIFrame() bool {
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return p.RenderContentMode == setting.RenderContentModeIframe
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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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baseLinkSrc := ctx.RenderHelper.ResolveLink("", markup.LinkTypeDefault)
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baseLinkRaw := ctx.RenderHelper.ResolveLink("", markup.LinkTypeRaw)
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command := strings.NewReplacer(
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envMark("GITEA_PREFIX_SRC"), baseLinkSrc,
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envMark("GITEA_PREFIX_RAW"), baseLinkRaw,
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).Replace(p.Command)
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commands, err := shellquote.Split(command)
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if err != nil || len(commands) == 0 {
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return fmt.Errorf("%s invalid command %q: %w", p.Name(), p.Command, err)
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}
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args := commands[1:]
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if p.IsInputFile {
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// write to temp file
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f, cleanup, err := setting.AppDataTempDir("git-repo-content").CreateTempFileRandom("gitea_input")
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if err != nil {
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return fmt.Errorf("%s create temp file when rendering %s failed: %w", p.Name(), p.Command, err)
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}
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defer cleanup()
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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: %w", 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: %w", 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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processCtx, _, finished := process.GetManager().AddContext(ctx, fmt.Sprintf("Render [%s] for %s", commands[0], baseLinkSrc))
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defer finished()
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cmd := exec.CommandContext(processCtx, commands[0], args...)
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cmd.Env = append(
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os.Environ(),
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"GITEA_PREFIX_SRC="+baseLinkSrc,
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"GITEA_PREFIX_RAW="+baseLinkRaw,
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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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var stderr bytes.Buffer
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cmd.Stdout = output
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cmd.Stderr = &stderr
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process.SetSysProcAttribute(cmd)
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if err := cmd.Run(); err != nil {
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return fmt.Errorf("%s render run command %s %v failed: %w\nStderr: %s", p.Name(), commands[0], args, err, stderr.String())
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}
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return nil
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}
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