Make wiki pages visit fast (#32732) (#32745)

Backport #32732 by @lunny

Fix #20156

We reuse the code from the repository code view instead of the current
code.
Previously it took `5653ms` for
https://gitea.com/henri/wiki/wiki/?action=_pages in my local machine,
now it's about `300ms` .

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

routers/web/repo/wiki.go

@@ -6,6 +6,7 @@ package repo
 
 import (
 	"bytes"
+	gocontext "context"
 	"fmt"
 	"io"
 	"net/http"
@@ -651,22 +652,32 @@ func WikiPages(ctx *context.Context) {
 		return
 	}
 
-	entries, err := commit.ListEntries()
+	treePath := "" // To support list sub folders' pages in the future
+	tree, err := commit.SubTree(treePath)
+	if err != nil {
+		ctx.ServerError("SubTree", err)
+		return
+	}
+
+	allEntries, err := tree.ListEntries()
 	if err != nil {
 		ctx.ServerError("ListEntries", err)
 		return
 	}
-	pages := make([]PageMeta, 0, len(entries))
-	for _, entry := range entries {
-		if !entry.IsRegular() {
-			continue
-		}
-		c, err := wikiRepo.GetCommitByPath(entry.Name())
+	allEntries.CustomSort(base.NaturalSortLess)
+
+	entries, _, err := allEntries.GetCommitsInfo(gocontext.Context(ctx), commit, treePath)
 	if err != nil {
-			ctx.ServerError("GetCommit", err)
+		ctx.ServerError("GetCommitsInfo", err)
 		return
 	}
-		wikiName, err := wiki_service.GitPathToWebPath(entry.Name())
+
+	pages := make([]PageMeta, 0, len(entries))
+	for _, entry := range entries {
+		if !entry.Entry.IsRegular() {
+			continue
+		}
+		wikiName, err := wiki_service.GitPathToWebPath(entry.Entry.Name())
 		if err != nil {
 			if repo_model.IsErrWikiInvalidFileName(err) {
 				continue
@@ -678,8 +689,8 @@ func WikiPages(ctx *context.Context) {
 		pages = append(pages, PageMeta{
 			Name:         displayName,
 			SubURL:       wiki_service.WebPathToURLPath(wikiName),
-			GitEntryName: entry.Name(),
-			UpdatedUnix:  timeutil.TimeStamp(c.Author.When.Unix()),
+			GitEntryName: entry.Entry.Name(),
+			UpdatedUnix:  timeutil.TimeStamp(entry.Commit.Author.When.Unix()),
 		})
 	}
 	ctx.Data["Pages"] = pages

tests/integration/wiki_test.go

@@ -6,15 +6,18 @@ package integration
 import (
 	"context"
 	"fmt"
+	"net/http"
 	"net/url"
 	"os"
 	"path/filepath"
+	"strings"
 	"testing"
 
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/util"
 	"code.gitea.io/gitea/tests"
 
+	"github.com/PuerkitoBio/goquery"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -50,3 +53,23 @@ func TestRepoCloneWiki(t *testing.T) {
 		})
 	})
 }
+
+func Test_RepoWikiPages(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+
+	url := "/user2/repo1/wiki/?action=_pages"
+	req := NewRequest(t, "GET", url)
+	resp := MakeRequest(t, req, http.StatusOK)
+
+	doc := NewHTMLParser(t, resp.Body)
+	expectedPagePaths := []string{
+		"Home", "Page-With-Image", "Page-With-Spaced-Name", "Unescaped-File",
+	}
+	doc.Find("tr").Each(func(i int, s *goquery.Selection) {
+		firstAnchor := s.Find("a").First()
+		href, _ := firstAnchor.Attr("href")
+		pagePath := strings.TrimPrefix(href, "/user2/repo1/wiki/")
+
+		assert.EqualValues(t, expectedPagePaths[i], pagePath)
+	})
+}