Add gitea provider

backend/app/gitprovider/github.go

@@ -1,11 +1,9 @@
 package gitprovider
 
 import (
-	"archive/zip"
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/fs"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -149,97 +147,3 @@ func downloadAndExtract(repoOwner, repoName, branch, pat, destDir string) error
 	}
 	return nil
 }
-
-// unzip extracts the zip at src into the dest directory,
-// guarding against zip-slip path traversal attacks.
-func unzip(src, dest string) error {
-	r, err := zip.OpenReader(src)
-	if err != nil {
-		return err
-	}
-	defer r.Close()
-
-	destClean := filepath.Clean(dest) + string(os.PathSeparator)
-
-	for _, f := range r.File {
-		target := filepath.Join(dest, filepath.Clean("/"+f.Name))
-		if !strings.HasPrefix(target, destClean) {
-			return fmt.Errorf("zip slip attempt: %q resolves outside destination", f.Name)
-		}
-
-		if f.FileInfo().IsDir() {
-			if err = os.MkdirAll(target, f.Mode()); err != nil {
-				return err
-			}
-			continue
-		}
-
-		if err = os.MkdirAll(filepath.Dir(target), 0o755); err != nil {
-			return err
-		}
-
-		if err = writeZipEntry(f, target); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-func writeZipEntry(f *zip.File, target string) error {
-	rc, err := f.Open()
-	if err != nil {
-		return err
-	}
-	defer rc.Close()
-
-	out, err := os.OpenFile(target, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
-	if err != nil {
-		return err
-	}
-	defer out.Close()
-
-	_, err = io.Copy(out, rc)
-	return err
-}
-
-// copyDir recursively copies src to dst, preserving file modes.
-// Used as a cross-device fallback when os.Rename fails.
-func copyDir(src, dst string) error {
-	return filepath.WalkDir(src, func(path string, d fs.DirEntry, err error) error {
-		if err != nil {
-			return err
-		}
-		rel, err := filepath.Rel(src, path)
-		if err != nil {
-			return err
-		}
-		target := filepath.Join(dst, rel)
-
-		if d.IsDir() {
-			return os.MkdirAll(target, 0o755)
-		}
-
-		info, err := d.Info()
-		if err != nil {
-			return err
-		}
-		return copyFile(path, target, info.Mode())
-	})
-}
-
-func copyFile(src, dst string, mode fs.FileMode) error {
-	in, err := os.Open(src)
-	if err != nil {
-		return err
-	}
-	defer in.Close()
-
-	out, err := os.OpenFile(dst, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, mode)
-	if err != nil {
-		return err
-	}
-	defer out.Close()
-
-	_, err = io.Copy(out, in)
-	return err
-}