Fix to close opened io resources as soon as not needed (#8839)

* Fix to close opened io resources as soon as not needed

* Remove unneeded err checks

modules/migrations/gitea.go

@@ -252,6 +252,7 @@ func (g *GiteaLocalUploader) CreateReleases(releases ...*base.Release) error {
 			}
 
 			// download attachment
+			err = func() error {
 				resp, err := http.Get(asset.URL)
 				if err != nil {
 					return err
@@ -269,10 +270,12 @@ func (g *GiteaLocalUploader) CreateReleases(releases ...*base.Release) error {
 				}
 				defer fw.Close()
 
-			if _, err := io.Copy(fw, resp.Body); err != nil {
+				_, err = io.Copy(fw, resp.Body)
+				return err
+			}()
+			if err != nil {
 				return err
 			}
-
 			rel.Attachments = append(rel.Attachments, &attach)
 		}
 
@@ -468,21 +471,24 @@ func (g *GiteaLocalUploader) newPullRequest(pr *base.PullRequest) (*models.PullR
 	}
 
 	// download patch file
+	err := func() error {
 		resp, err := http.Get(pr.PatchURL)
 		if err != nil {
-		return nil, err
+			return err
 		}
 		defer resp.Body.Close()
 		pullDir := filepath.Join(g.repo.RepoPath(), "pulls")
 		if err = os.MkdirAll(pullDir, os.ModePerm); err != nil {
-		return nil, err
+			return err
 		}
 		f, err := os.Create(filepath.Join(pullDir, fmt.Sprintf("%d.patch", pr.Number)))
 		if err != nil {
-		return nil, err
+			return err
 		}
 		defer f.Close()
 		_, err = io.Copy(f, resp.Body)
+		return err
+	}()
 	if err != nil {
 		return nil, err
 	}
@@ -496,8 +502,8 @@ func (g *GiteaLocalUploader) newPullRequest(pr *base.PullRequest) (*models.PullR
 	if err != nil {
 		return nil, err
 	}
-	defer p.Close()
 	_, err = p.WriteString(pr.Head.SHA)
+	p.Close()
 	if err != nil {
 		return nil, err
 	}
@@ -531,8 +537,8 @@ func (g *GiteaLocalUploader) newPullRequest(pr *base.PullRequest) (*models.PullR
 					if err != nil {
 						return nil, err
 					}
-					defer b.Close()
 					_, err = b.WriteString(pr.Head.SHA)
+					b.Close()
 					if err != nil {
 						return nil, err
 					}