Drop "unrolled/render" package (#23965)

None of the features of `unrolled/render` package is used. 

The Golang builtin "html/template" just works well. Then we can improve
our HTML render to resolve the "$.root.locale.Tr" problem as much as
possible.

Next step: we can have a template render pool (by Clone), then we can
inject global functions with dynamic context to every `Execute` calls.
Then we can use `{{Locale.Tr ....}}` directly in all templates , no need
to pass the `$.root.locale` again and again.

build/generate-go-licenses.go

@@ -7,9 +7,10 @@ package main
 
 import (
 	"encoding/json"
+	"fmt"
 	"io/fs"
 	"os"
-	goPath "path"
+	"path"
 	"path/filepath"
 	"regexp"
 	"sort"
@@ -27,9 +28,14 @@ type LicenseEntry struct {
 }
 
 func main() {
+	if len(os.Args) != 3 {
+		fmt.Println("usage: go run generate-go-licenses.go <base-dir> <out-json-file>")
+		os.Exit(1)
+	}
+
 	base, out := os.Args[1], os.Args[2]
 
-	paths := []string{}
+	var paths []string
 	err := filepath.WalkDir(base, func(path string, entry fs.DirEntry, err error) error {
 		if err != nil {
 			return err
@@ -46,28 +52,27 @@ func main() {
 
 	sort.Strings(paths)
 
-	entries := []LicenseEntry{}
-	for _, path := range paths {
-		path := filepath.ToSlash(path)
-
-		licenseText, err := os.ReadFile(path)
+	var entries []LicenseEntry
+	for _, filePath := range paths {
+		licenseText, err := os.ReadFile(filePath)
 		if err != nil {
 			panic(err)
 		}
 
-		path = strings.Replace(path, base+"/", "", 1)
-		name := goPath.Dir(path)
+		pkgPath := filepath.ToSlash(filePath)
+		pkgPath = strings.TrimPrefix(pkgPath, base+"/")
+		pkgName := path.Dir(pkgPath)
 
 		// There might be a bug somewhere in go-licenses that sometimes interprets the
 		// root package as "." and sometimes as "code.gitea.io/gitea". Workaround by
 		// removing both of them for the sake of stable output.
-		if name == "." || name == "code.gitea.io/gitea" {
+		if pkgName == "." || pkgName == "code.gitea.io/gitea" {
 			continue
 		}
 
 		entries = append(entries, LicenseEntry{
-			Name:        name,
-			Path:        path,
+			Name:        pkgName,
+			Path:        pkgPath,
 			LicenseText: string(licenseText),
 		})
 	}

go.mod

@@ -96,7 +96,6 @@ require (
 	github.com/stretchr/testify v1.8.1
 	github.com/syndtr/goleveldb v1.0.0
 	github.com/tstranex/u2f v1.0.0
-	github.com/unrolled/render v1.5.0
 	github.com/urfave/cli v1.22.12
 	github.com/xanzy/go-gitlab v0.80.2
 	github.com/xeipuuv/gojsonschema v1.2.0

go.sum

@@ -1182,8 +1182,6 @@ github.com/ulikunitz/xz v0.5.11/go.mod h1:nbz6k7qbPmH4IRqmfOplQw/tblSgqTqBwxkY0o
 github.com/unknwon/com v0.0.0-20190804042917-757f69c95f3e/go.mod h1:tOOxU81rwgoCLoOVVPHb6T/wt8HZygqH5id+GNnlCXM=
 github.com/unknwon/com v1.0.1 h1:3d1LTxD+Lnf3soQiD4Cp/0BRB+Rsa/+RTvz8GMMzIXs=
 github.com/unknwon/com v1.0.1/go.mod h1:tOOxU81rwgoCLoOVVPHb6T/wt8HZygqH5id+GNnlCXM=
-github.com/unrolled/render v1.5.0 h1:uNTHMvVoI9pyyXfgoDHHycIqFONNY2p4eQR9ty+NsxM=
-github.com/unrolled/render v1.5.0/go.mod h1:eLTosBkQqEPEk7pRfkCRApXd++lm++nCsVlFOHpeedw=
 github.com/urfave/cli v1.20.0/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijbERA=
 github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
 github.com/urfave/cli v1.22.12 h1:igJgVw1JdKH+trcLWLeLwZjU9fEfPesQ+9/e4MQ44S8=

modules/context/context.go

@@ -42,14 +42,13 @@ import (
 	"gitea.com/go-chi/session"
 	chi "github.com/go-chi/chi/v5"
 	"github.com/minio/sha256-simd"
-	"github.com/unrolled/render"
 	"golang.org/x/crypto/pbkdf2"
 )
 
 // Render represents a template render
 type Render interface {
 	TemplateLookup(tmpl string) *template.Template
-	HTML(w io.Writer, status int, name string, binding interface{}, htmlOpt ...render.HTMLOptions) error
+	HTML(w io.Writer, status int, name string, data interface{}) error
 }
 
 // Context represents context of a request.

modules/templates/htmlrenderer.go

@@ -7,15 +7,18 @@ import (
 	"bytes"
 	"context"
 	"fmt"
+	"html/template"
+	"io"
+	"net/http"
+	"path/filepath"
 	"regexp"
 	"strconv"
 	"strings"
+	"sync/atomic"
 
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/watcher"
-
-	"github.com/unrolled/render"
 )
 
 var (
@@ -27,15 +30,51 @@ var (
 	expectedEndError = regexp.MustCompile(`^template: (.*):([0-9]+): expected end; found (.*)`)
 )
 
+type HTMLRender struct {
+	templates atomic.Pointer[template.Template]
+}
+
+func (h *HTMLRender) HTML(w io.Writer, status int, name string, data interface{}) error {
+	if respWriter, ok := w.(http.ResponseWriter); ok {
+		if respWriter.Header().Get("Content-Type") == "" {
+			respWriter.Header().Set("Content-Type", "text/html; charset=utf-8")
+		}
+		respWriter.WriteHeader(status)
+	}
+	return h.templates.Load().ExecuteTemplate(w, name, data)
+}
+
+func (h *HTMLRender) TemplateLookup(t string) *template.Template {
+	return h.templates.Load().Lookup(t)
+}
+
+func (h *HTMLRender) CompileTemplates() error {
+	dirPrefix := "templates/"
+	tmpls := template.New("")
+	for _, path := range GetTemplateAssetNames() {
+		name := path[len(dirPrefix):]
+		name = strings.TrimSuffix(name, ".tmpl")
+		tmpl := tmpls.New(filepath.ToSlash(name))
+		for _, fm := range NewFuncMap() {
+			tmpl.Funcs(fm)
+		}
+		buf, err := GetAsset(path)
+		if err != nil {
+			return err
+		}
+		if _, err = tmpl.Parse(string(buf)); err != nil {
+			return err
+		}
+	}
+	h.templates.Store(tmpls)
+	return nil
+}
+
 // HTMLRenderer returns the current html renderer for the context or creates and stores one within the context for future use
-func HTMLRenderer(ctx context.Context) (context.Context, *render.Render) {
-	rendererInterface := ctx.Value(rendererKey)
-	if rendererInterface != nil {
-		renderer, ok := rendererInterface.(*render.Render)
-		if ok {
+func HTMLRenderer(ctx context.Context) (context.Context, *HTMLRender) {
+	if renderer, ok := ctx.Value(rendererKey).(*HTMLRender); ok {
 		return ctx, renderer
 	}
-	}
 
 	rendererType := "static"
 	if !setting.IsProd {
@@ -43,53 +82,24 @@ func HTMLRenderer(ctx context.Context) (context.Context, *render.Render) {
 	}
 	log.Log(1, log.DEBUG, "Creating "+rendererType+" HTML Renderer")
 
-	compilingTemplates := true
-	defer func() {
-		if !compilingTemplates {
-			return
-		}
-
-		panicked := recover()
-		if panicked == nil {
-			return
-		}
-
-		// OK try to handle the panic...
-		err, ok := panicked.(error)
-		if ok {
-			handlePanicError(err)
+	renderer := &HTMLRender{}
+	if err := renderer.CompileTemplates(); err != nil {
+		handleFatalError(err)
 	}
-		log.Fatal("PANIC: Unable to compile templates!\n%v\n\nStacktrace:\n%s", panicked, log.Stack(2))
-	}()
-
-	renderer := render.New(render.Options{
-		Extensions:                []string{".tmpl"},
-		Directory:                 "templates",
-		Funcs:                     NewFuncMap(),
-		Asset:                     GetAsset,
-		AssetNames:                GetTemplateAssetNames,
-		UseMutexLock:              !setting.IsProd,
-		IsDevelopment:             false,
-		DisableHTTPErrorRendering: true,
-	})
-	compilingTemplates = false
 	if !setting.IsProd {
 		watcher.CreateWatcher(ctx, "HTML Templates", &watcher.CreateWatcherOpts{
 			PathsCallback: walkTemplateFiles,
 			BetweenCallback: func() {
-				defer func() {
-					if err := recover(); err != nil {
-						log.Error("PANIC: %v\n%s", err, log.Stack(2))
+				if err := renderer.CompileTemplates(); err != nil {
+					log.Error("Template error: %v\n%s", err, log.Stack(2))
 				}
-				}()
-				renderer.CompileTemplates()
 			},
 		})
 	}
 	return context.WithValue(ctx, rendererKey, renderer), renderer
 }
 
-func handlePanicError(err error) {
+func handleFatalError(err error) {
 	wrapFatal(handleNotDefinedPanicError(err))
 	wrapFatal(handleUnexpected(err))
 	wrapFatal(handleExpectedEnd(err))

modules/test/context_tests.go

@@ -22,7 +22,6 @@ import (
 
 	chi "github.com/go-chi/chi/v5"
 	"github.com/stretchr/testify/assert"
-	"github.com/unrolled/render"
 )
 
 // MockContext mock context for unit tests
@@ -138,7 +137,7 @@ func (tr *mockRender) TemplateLookup(tmpl string) *template.Template {
 	return nil
 }
 
-func (tr *mockRender) HTML(w io.Writer, status int, _ string, _ interface{}, _ ...render.HTMLOptions) error {
+func (tr *mockRender) HTML(w io.Writer, status int, _ string, _ interface{}) error {
 	if resp, ok := w.(http.ResponseWriter); ok {
 		resp.WriteHeader(status)
 	}

services/auth/sspi_windows.go

@@ -23,7 +23,6 @@ import (
 
 	gouuid "github.com/google/uuid"
 	"github.com/quasoft/websspi"
-	"github.com/unrolled/render"
 )
 
 const (
@@ -48,7 +47,7 @@ var (
 // On successful authentication returns a valid user object.
 // Returns nil if authentication fails.
 type SSPI struct {
-	rnd *render.Render
+	rnd *templates.HTMLRender
 }
 
 // Init creates a new global websspi.Authenticator object

tests/integration/markup_external_test.go

@@ -27,7 +27,7 @@ func TestExternalMarkupRenderer(t *testing.T) {
 	const repoURL = "user30/renderer"
 	req := NewRequest(t, "GET", repoURL+"/src/branch/master/README.html")
 	resp := MakeRequest(t, req, http.StatusOK)
-	assert.EqualValues(t, "text/html; charset=UTF-8", resp.Header()["Content-Type"][0])
+	assert.EqualValues(t, "text/html; charset=utf-8", resp.Header()["Content-Type"][0])
 
 	bs, err := io.ReadAll(resp.Body)
 	assert.NoError(t, err)