Refactor issue template parsing and fix API endpoint

routers/api/v1/api.go

@@ -811,7 +811,7 @@ func individualPermsChecker(ctx *context.APIContext) {
 // check for and warn against deprecated authentication options
 func checkDeprecatedAuthMethods(ctx *context.APIContext) {
 	if ctx.FormString("token") != "" || ctx.FormString("access_token") != "" {
-		ctx.Resp.Header().Set("Warning", "token and access_token API authentication is deprecated and will be removed in gitea 1.23. Please use AuthorizationHeaderToken instead. Existing queries will continue to work but without authorization.")
+		ctx.Resp.Header().Set("X-Gitea-Warning", "token and access_token API authentication is deprecated and will be removed in gitea 1.23. Please use AuthorizationHeaderToken instead. Existing queries will continue to work but without authorization.")
 	}
 }
 

routers/api/v1/repo/repo.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"net/http"
 	"slices"
+	"strconv"
 	"strings"
 	"time"
 
@@ -1161,12 +1162,11 @@ func GetIssueTemplates(ctx *context.APIContext) {
 	//     "$ref": "#/responses/IssueTemplates"
 	//   "404":
 	//     "$ref": "#/responses/notFound"
-	ret, err := issue.GetTemplatesFromDefaultBranch(ctx.Repo.Repository, ctx.Repo.GitRepo)
-	if err != nil {
-		ctx.Error(http.StatusInternalServerError, "GetTemplatesFromDefaultBranch", err)
-		return
+	ret := issue.ParseTemplatesFromDefaultBranch(ctx.Repo.Repository, ctx.Repo.GitRepo)
+	if cnt := len(ret.TemplateErrors); cnt != 0 {
+		ctx.Resp.Header().Add("X-Gitea-Warning", "error occurs when parsing issue template: count="+strconv.Itoa(cnt))
 	}
-	ctx.JSON(http.StatusOK, ret)
+	ctx.JSON(http.StatusOK, ret.IssueTemplates)
 }
 
 // GetIssueConfig returns the issue config for a repo

routers/web/repo/issue.go

@@ -993,17 +993,17 @@ func NewIssue(ctx *context.Context) {
 	}
 	ctx.Data["Tags"] = tags
 
-	_, templateErrs := issue_service.GetTemplatesFromDefaultBranch(ctx.Repo.Repository, ctx.Repo.GitRepo)
+	ret := issue_service.ParseTemplatesFromDefaultBranch(ctx.Repo.Repository, ctx.Repo.GitRepo)
 	templateLoaded, errs := setTemplateIfExists(ctx, issueTemplateKey, IssueTemplateCandidates)
 	for k, v := range errs {
-		templateErrs[k] = v
+		ret.TemplateErrors[k] = v
 	}
 	if ctx.Written() {
 		return
 	}
 
-	if len(templateErrs) > 0 {
-		ctx.Flash.Warning(renderErrorOfTemplates(ctx, templateErrs), true)
+	if len(ret.TemplateErrors) > 0 {
+		ctx.Flash.Warning(renderErrorOfTemplates(ctx, ret.TemplateErrors), true)
 	}
 
 	ctx.Data["HasIssuesOrPullsWritePermission"] = ctx.Repo.CanWrite(unit.TypeIssues)
@@ -1046,11 +1046,11 @@ func NewIssueChooseTemplate(ctx *context.Context) {
 	ctx.Data["Title"] = ctx.Tr("repo.issues.new")
 	ctx.Data["PageIsIssueList"] = true
 
-	issueTemplates, errs := issue_service.GetTemplatesFromDefaultBranch(ctx.Repo.Repository, ctx.Repo.GitRepo)
-	ctx.Data["IssueTemplates"] = issueTemplates
+	ret := issue_service.ParseTemplatesFromDefaultBranch(ctx.Repo.Repository, ctx.Repo.GitRepo)
+	ctx.Data["IssueTemplates"] = ret.IssueTemplates
 
-	if len(errs) > 0 {
-		ctx.Flash.Warning(renderErrorOfTemplates(ctx, errs), true)
+	if len(ret.TemplateErrors) > 0 {
+		ctx.Flash.Warning(renderErrorOfTemplates(ctx, ret.TemplateErrors), true)
 	}
 
 	if !issue_service.HasTemplatesOrContactLinks(ctx.Repo.Repository, ctx.Repo.GitRepo) {

routers/web/repo/milestone.go

@@ -294,8 +294,8 @@ func MilestoneIssuesAndPulls(ctx *context.Context) {
 
 	issues(ctx, milestoneID, projectID, util.OptionalBoolNone)
 
-	ret, _ := issue.GetTemplatesFromDefaultBranch(ctx.Repo.Repository, ctx.Repo.GitRepo)
-	ctx.Data["NewIssueChooseTemplate"] = len(ret) > 0
+	ret := issue.ParseTemplatesFromDefaultBranch(ctx.Repo.Repository, ctx.Repo.GitRepo)
+	ctx.Data["NewIssueChooseTemplate"] = len(ret.IssueTemplates) > 0
 
 	ctx.Data["CanWriteIssues"] = ctx.Repo.CanWriteIssuesOrPulls(false)
 	ctx.Data["CanWritePulls"] = ctx.Repo.CanWriteIssuesOrPulls(true)

services/issue/template.go

@@ -109,21 +109,23 @@ func IsTemplateConfig(path string) bool {
 	return false
 }
 
-// GetTemplatesFromDefaultBranch checks for issue templates in the repo's default branch,
-// returns valid templates and the errors of invalid template files.
-func GetTemplatesFromDefaultBranch(repo *repo.Repository, gitRepo *git.Repository) ([]*api.IssueTemplate, map[string]error) {
-	var issueTemplates []*api.IssueTemplate
-
+// ParseTemplatesFromDefaultBranch parses the issue templates in the repo's default branch,
+// returns valid templates and the errors of invalid template files (the errors map is guaranteed to be non-nil).
+func ParseTemplatesFromDefaultBranch(repo *repo.Repository, gitRepo *git.Repository) (ret struct {
+	IssueTemplates []*api.IssueTemplate
+	TemplateErrors map[string]error
+},
+) {
+	ret.TemplateErrors = map[string]error{}
 	if repo.IsEmpty {
-		return issueTemplates, nil
+		return ret
 	}
 
 	commit, err := gitRepo.GetBranchCommit(repo.DefaultBranch)
 	if err != nil {
-		return issueTemplates, nil
+		return ret
 	}
 
-	invalidFiles := map[string]error{}
 	for _, dirName := range templateDirCandidates {
 		tree, err := commit.SubTree(dirName)
 		if err != nil {
@@ -133,24 +135,24 @@ func GetTemplatesFromDefaultBranch(repo *repo.Repository, gitRepo *git.Repositor
 		entries, err := tree.ListEntries()
 		if err != nil {
 			log.Debug("list entries in %s: %v", dirName, err)
-			return issueTemplates, nil
+			return ret
 		}
 		for _, entry := range entries {
 			if !template.CouldBe(entry.Name()) {
 				continue
 			}
 			fullName := path.Join(dirName, entry.Name())
 			if it, err := template.UnmarshalFromEntry(entry, dirName); err != nil {
-				invalidFiles[fullName] = err
+				ret.TemplateErrors[fullName] = err
 			} else {
 				if !strings.HasPrefix(it.Ref, "refs/") { // Assume that the ref intended is always a branch - for tags users should use refs/tags/<ref>
 					it.Ref = git.BranchPrefix + it.Ref
 				}
-				issueTemplates = append(issueTemplates, it)
+				ret.IssueTemplates = append(ret.IssueTemplates, it)
 			}
 		}
 	}
-	return issueTemplates, invalidFiles
+	return ret
 }
 
 // GetTemplateConfigFromDefaultBranch returns the issue config for this repo.
@@ -179,8 +181,8 @@ func GetTemplateConfigFromDefaultBranch(repo *repo.Repository, gitRepo *git.Repo
 }
 
 func HasTemplatesOrContactLinks(repo *repo.Repository, gitRepo *git.Repository) bool {
-	ret, _ := GetTemplatesFromDefaultBranch(repo, gitRepo)
-	if len(ret) > 0 {
+	ret := ParseTemplatesFromDefaultBranch(repo, gitRepo)
+	if len(ret.IssueTemplates) > 0 {
 		return true
 	}
 

tests/integration/api_issue_templates_test.go

@@ -0,0 +1,55 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package integration
+
+import (
+	"net/http"
+	"net/url"
+	"testing"
+
+	repo_model "code.gitea.io/gitea/models/repo"
+	"code.gitea.io/gitea/models/unittest"
+	user_model "code.gitea.io/gitea/models/user"
+	api "code.gitea.io/gitea/modules/structs"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAPIIssueTemplateList(t *testing.T) {
+	onGiteaRun(t, func(*testing.T, *url.URL) {
+		var issueTemplates []*api.IssueTemplate
+
+		user := unittest.AssertExistsAndLoadBean(t, &user_model.User{Name: "user2"})
+		repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: "user2", Name: "repo1"})
+
+		// no issue template
+		req := NewRequest(t, "GET", "/api/v1/repos/user2/repo1/issue_templates")
+		resp := MakeRequest(t, req, http.StatusOK)
+		issueTemplates = nil
+		DecodeJSON(t, resp, &issueTemplates)
+		assert.Empty(t, issueTemplates)
+
+		// one correct issue template and some incorrect issue templates
+		err := createOrReplaceFileInBranch(user, repo, ".gitea/ISSUE_TEMPLATE/tmpl-ok.md", repo.DefaultBranch, `----
+name: foo
+about: bar
+----
+`)
+		assert.NoError(t, err)
+
+		err = createOrReplaceFileInBranch(user, repo, ".gitea/ISSUE_TEMPLATE/tmpl-err1.yml", repo.DefaultBranch, `name: '`)
+		assert.NoError(t, err)
+
+		err = createOrReplaceFileInBranch(user, repo, ".gitea/ISSUE_TEMPLATE/tmpl-err2.yml", repo.DefaultBranch, `other: `)
+		assert.NoError(t, err)
+
+		req = NewRequest(t, "GET", "/api/v1/repos/user2/repo1/issue_templates")
+		resp = MakeRequest(t, req, http.StatusOK)
+		issueTemplates = nil
+		DecodeJSON(t, resp, &issueTemplates)
+		assert.Len(t, issueTemplates, 1)
+		assert.Equal(t, "foo", issueTemplates[0].Name)
+		assert.Equal(t, "error occurs when parsing issue template: count=2", resp.Header().Get("X-Gitea-Warning"))
+	})
+}