Function copyFile

server/server.go:1154–1181

(srcPath, dstPath string, mode os.FileMode)

		}
		dstPath := filepath.Join(dstRoot, rel)

		info, err := os.Lstat(path)
		if err != nil {
			return err
		}
		if walkInfo != nil {
			info = walkInfo
		}
		if info.IsDir() {
			return os.MkdirAll(dstPath, 0o750)
		}
		if info.Mode()&os.ModeSymlink != 0 {
			return nil
		}
		if err := os.MkdirAll(filepath.Dir(dstPath), 0o750); err != nil {
			return err
		}
		if _, err := os.Stat(dstPath); err == nil {
			if !shouldRefreshBundledExtension(path) {
				return nil
			}
		} else if !errors.Is(err, os.ErrNotExist) {
			return err
		}

		return copyFile(path, dstPath, info.Mode().Perm())
	})
}

// shouldRefreshBundledExtension returns true for bundled extensions whose
// on-disk copy in DataDir/extensions/v<ver>/<platform>/ must be overwritten