Fix extracting of several archives.

- Archive already existing must not stop download of other archives.
- Use copytree instead of rename to use second archive as patch on existing
  directory. (No need to remove tmpdir, as it is a temporary directory)

kiwixbuild/utils.py

@@ -275,7 +275,19 @@ def extract_archive(archive_path, dest_dir, topdir=None, name=None):
                         perm = (member.external_attr >> 16) & 0x1FF
                         os.chmod(pj(tmpdir, getname(member)), perm)
                 name = name or topdir
-                os.rename(pj(tmpdir, topdir), pj(dest_dir, name))
+                shutil.copytree(
+                    pj(tmpdir, topdir),
+                    pj(dest_dir, name),
+                    symlinks=True,
+                    dirs_exist_ok=True,
+                )
+                # Be sure that all directory in tmpdir are writable to allow correct suppersion of it
+                for root, dirs, _files in os.walk(tmpdir):
+                    for d in dirs:
+                        os.chmod(
+                            pj(root, d), stat.S_IWRITE | stat.S_IREAD | stat.S_IEXEC
+                        )
+
         else:
             if name:
                 dest_dir = pj(dest_dir, name)