add org readme to search with priority

This adds org-mode readmes to the extensions that are prioritized when
searching for readme. Org-mode readmes come after markdown readmes in
terms of priority and before txt readmes.

Closes #4073

routers/web/repo/view.go

@@ -75,12 +75,13 @@ const (
 //	entries == ctx.Repo.Commit.SubTree(ctx.Repo.TreePath).ListEntries()
 //
 // FIXME: There has to be a more efficient way of doing this
-func findReadmeFileInEntries(ctx *context.Context, entries []*git.TreeEntry, tryWellKnownDirs bool) (string, *git.TreeEntry, error) {
+func FindReadmeFileInEntries(ctx *context.Context, entries []*git.TreeEntry, tryWellKnownDirs bool) (string, *git.TreeEntry, error) {
 	// Create a list of extensions in priority order
 	// 1. Markdown files - with and without localisation - e.g. README.en-us.md or README.md
-	// 2. Txt files - e.g. README.txt
+	// 2. Org-Mode files - with and without localisation - e.g. README.en-us.org or README.org
-	// 3. No extension - e.g. README
+	// 3. Txt files - e.g. README.txt
-	exts := append(localizedExtensions(".md", ctx.Locale.Language()), ".txt", "") // sorted by priority
+	// 4. No extension - e.g. README
+	exts := append(append(localizedExtensions(".md", ctx.Locale.Language()), localizedExtensions(".org", ctx.Locale.Language())...), ".txt", "") // sorted by priority
 	extCount := len(exts)
 	readmeFiles := make([]*git.TreeEntry, extCount+1)
 
@@ -151,7 +152,7 @@ func findReadmeFileInEntries(ctx *context.Context, entries []*git.TreeEntry, try
 				return "", nil, err
 			}
 
-			subfolder, readmeFile, err := findReadmeFileInEntries(ctx, childEntries, false)
+			subfolder, readmeFile, err := FindReadmeFileInEntries(ctx, childEntries, false)
 			if err != nil && !git.IsErrNotExist(err) {
 				return "", nil, err
 			}
@@ -175,7 +176,7 @@ func renderDirectory(ctx *context.Context) {
 		ctx.Data["Title"] = ctx.Tr("repo.file.title", ctx.Repo.Repository.Name+"/"+ctx.Repo.TreePath, ctx.Repo.RefName)
 	}
 
-	subfolder, readmeFile, err := findReadmeFileInEntries(ctx, entries, true)
+	subfolder, readmeFile, err := FindReadmeFileInEntries(ctx, entries, true)
 	if err != nil {
 		ctx.ServerError("findReadmeFileInEntries", err)
 		return

tests/integration/repo_view_test.go

@@ -0,0 +1,154 @@
+// Copyright 2024 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package integration
+
+import (
+	"fmt"
+	"net/url"
+	"strings"
+	"testing"
+
+	unit_model "code.gitea.io/gitea/models/unit"
+	"code.gitea.io/gitea/models/unittest"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/routers/web/repo"
+	"code.gitea.io/gitea/services/context"
+	"code.gitea.io/gitea/services/contexttest"
+	files_service "code.gitea.io/gitea/services/repository/files"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func createRepoAndGetContext(t *testing.T, files []string, deleteMdReadme bool) (*context.Context, func()) {
+	t.Helper()
+
+	user := unittest.AssertExistsAndLoadBean(t, &user_model.User{Name: "user1"})
+
+	size := len(files)
+	if deleteMdReadme {
+		size++
+	}
+	changeFiles := make([]*files_service.ChangeRepoFile, size)
+	for i, e := range files {
+		changeFiles[i] = &files_service.ChangeRepoFile{
+			Operation:     "create",
+			TreePath:      e,
+			ContentReader: strings.NewReader("test"),
+		}
+	}
+	if deleteMdReadme {
+		changeFiles[len(files)] = &files_service.ChangeRepoFile{
+			Operation: "delete",
+			TreePath:  "README.md",
+		}
+	}
+
+	// README.md is already added by auto init
+	repo, _, f := CreateDeclarativeRepo(t, user, "readmetest", []unit_model.Type{unit_model.TypeCode}, nil, changeFiles)
+
+	ctx, _ := contexttest.MockContext(t, "user1/readmetest")
+	ctx.SetParams(":id", fmt.Sprint(repo.ID))
+	contexttest.LoadRepo(t, ctx, repo.ID)
+	contexttest.LoadRepoCommit(t, ctx)
+	return ctx, f
+}
+
+func TestRepoView_FindReadme(t *testing.T) {
+	t.Run("PrioOneLocalizedMdReadme", func(t *testing.T) {
+		onGiteaRun(t, func(t *testing.T, u *url.URL) {
+			ctx, f := createRepoAndGetContext(t, []string{"README.en.md", "README.en.org", "README.org", "README.txt", "README.tex"}, false)
+			defer f()
+
+			tree, _ := ctx.Repo.Commit.SubTree(ctx.Repo.TreePath)
+			entries, _ := tree.ListEntries()
+			_, file, _ := repo.FindReadmeFileInEntries(ctx, entries, false)
+
+			assert.Equal(t, "README.en.md", file.Name())
+		})
+	})
+	t.Run("PrioTwoMdReadme", func(t *testing.T) {
+		onGiteaRun(t, func(t *testing.T, u *url.URL) {
+			ctx, f := createRepoAndGetContext(t, []string{"README.en.org", "README.org", "README.txt", "README.tex"}, false)
+			defer f()
+
+			tree, _ := ctx.Repo.Commit.SubTree(ctx.Repo.TreePath)
+			entries, _ := tree.ListEntries()
+			_, file, _ := repo.FindReadmeFileInEntries(ctx, entries, false)
+
+			assert.Equal(t, "README.md", file.Name())
+		})
+	})
+	t.Run("PrioThreeLocalizedOrgReadme", func(t *testing.T) {
+		onGiteaRun(t, func(t *testing.T, u *url.URL) {
+			ctx, f := createRepoAndGetContext(t, []string{"README.en.org", "README.org", "README.txt", "README.tex"}, true)
+			defer f()
+
+			tree, _ := ctx.Repo.Commit.SubTree(ctx.Repo.TreePath)
+			entries, _ := tree.ListEntries()
+			_, file, _ := repo.FindReadmeFileInEntries(ctx, entries, false)
+
+			assert.Equal(t, "README.en.org", file.Name())
+		})
+	})
+	t.Run("PrioFourOrgReadme", func(t *testing.T) {
+		onGiteaRun(t, func(t *testing.T, u *url.URL) {
+			ctx, f := createRepoAndGetContext(t, []string{"README.org", "README.txt", "README.tex"}, true)
+			defer f()
+
+			tree, _ := ctx.Repo.Commit.SubTree(ctx.Repo.TreePath)
+			entries, _ := tree.ListEntries()
+			_, file, _ := repo.FindReadmeFileInEntries(ctx, entries, false)
+
+			assert.Equal(t, "README.org", file.Name())
+		})
+	})
+	t.Run("PrioFiveTxtReadme", func(t *testing.T) {
+		onGiteaRun(t, func(t *testing.T, u *url.URL) {
+			ctx, f := createRepoAndGetContext(t, []string{"README.txt", "README", "README.tex"}, true)
+			defer f()
+
+			tree, _ := ctx.Repo.Commit.SubTree(ctx.Repo.TreePath)
+			entries, _ := tree.ListEntries()
+			_, file, _ := repo.FindReadmeFileInEntries(ctx, entries, false)
+
+			assert.Equal(t, "README.txt", file.Name())
+		})
+	})
+	t.Run("PrioSixWithoutExtensionReadme", func(t *testing.T) {
+		onGiteaRun(t, func(t *testing.T, u *url.URL) {
+			ctx, f := createRepoAndGetContext(t, []string{"README", "README.tex"}, true)
+			defer f()
+
+			tree, _ := ctx.Repo.Commit.SubTree(ctx.Repo.TreePath)
+			entries, _ := tree.ListEntries()
+			_, file, _ := repo.FindReadmeFileInEntries(ctx, entries, false)
+
+			assert.Equal(t, "README", file.Name())
+		})
+	})
+	t.Run("PrioSevenAnyReadme", func(t *testing.T) {
+		onGiteaRun(t, func(t *testing.T, u *url.URL) {
+			ctx, f := createRepoAndGetContext(t, []string{"README.tex"}, true)
+			defer f()
+
+			tree, _ := ctx.Repo.Commit.SubTree(ctx.Repo.TreePath)
+			entries, _ := tree.ListEntries()
+			_, file, _ := repo.FindReadmeFileInEntries(ctx, entries, false)
+
+			assert.Equal(t, "README.tex", file.Name())
+		})
+	})
+	t.Run("DoNotPickReadmeIfNonPresent", func(t *testing.T) {
+		onGiteaRun(t, func(t *testing.T, u *url.URL) {
+			ctx, f := createRepoAndGetContext(t, []string{}, true)
+			defer f()
+
+			tree, _ := ctx.Repo.Commit.SubTree(ctx.Repo.TreePath)
+			entries, _ := tree.ListEntries()
+			_, file, _ := repo.FindReadmeFileInEntries(ctx, entries, false)
+
+			assert.Nil(t, file)
+		})
+	})
+}