Fix some slice append usages (#26778) (#26798)

Backport #26778 by @harryzcy

Co-authored-by: Chongyi Zheng <git@zcy.dev>
Co-authored-by: delvh <dev.lh@web.de>

modules/setting/service.go

@@ -221,7 +221,7 @@ func loadServiceFrom(rootCfg ConfigProvider) {
 	Service.UserDeleteWithCommentsMaxTime = sec.Key("USER_DELETE_WITH_COMMENTS_MAX_TIME").MustDuration(0)
 	sec.Key("VALID_SITE_URL_SCHEMES").MustString("http,https")
 	Service.ValidSiteURLSchemes = sec.Key("VALID_SITE_URL_SCHEMES").Strings(",")
-	schemes := make([]string, len(Service.ValidSiteURLSchemes))
+	schemes := make([]string, 0, len(Service.ValidSiteURLSchemes))
 	for _, scheme := range Service.ValidSiteURLSchemes {
 		scheme = strings.ToLower(strings.TrimSpace(scheme))
 		if scheme != "" {

routers/api/v1/repo/pull.go

@@ -326,11 +326,9 @@ func CreatePullRequest(ctx *context.APIContext) {
 			return
 		}
 
-		labelIDs = make([]int64, len(form.Labels))
-		orgLabelIDs := make([]int64, len(form.Labels))
-
-		for i := range labels {
-			labelIDs[i] = labels[i].ID
+		labelIDs = make([]int64, 0, len(labels))
+		for _, label := range labels {
+			labelIDs = append(labelIDs, label.ID)
 		}
 
 		if ctx.Repo.Owner.IsOrganization() {
@@ -340,12 +338,12 @@ func CreatePullRequest(ctx *context.APIContext) {
 				return
 			}
 
-			for i := range orgLabels {
-				orgLabelIDs[i] = orgLabels[i].ID
+			orgLabelIDs := make([]int64, 0, len(orgLabels))
+			for _, orgLabel := range orgLabels {
+				orgLabelIDs = append(orgLabelIDs, orgLabel.ID)
 			}
+			labelIDs = append(labelIDs, orgLabelIDs...)
 		}
-
-		labelIDs = append(labelIDs, orgLabelIDs...)
 	}
 
 	if form.Milestone > 0 {

services/repository/files/temp_repo.go

@@ -114,12 +114,12 @@ func (t *TemporaryUploadRepository) LsFiles(filenames ...string) ([]string, erro
 		return nil, err
 	}
 
-	filelist := make([]string, len(filenames))
+	fileList := make([]string, 0, len(filenames))
 	for _, line := range bytes.Split(stdOut.Bytes(), []byte{'\000'}) {
-		filelist = append(filelist, string(line))
+		fileList = append(fileList, string(line))
 	}
 
-	return filelist, nil
+	return fileList, nil
 }
 
 // RemoveFilesFromIndex removes the given files from the index