[builder][server] restore compatibility with python 3.7

1 files changed, 8 insertions, 7 deletions

diff --git a/src/hydrilla/builder/local_apt.py b/src/hydrilla/builder/local_apt.py
index 925fd61..385a533 100644
--- a/src/hydrilla/builder/local_apt.py
+++ b/src/hydrilla/builder/local_apt.py
@@ -143,7 +143,7 @@ class SourcesList:
     """Representation of apt's sources.list contents."""
     def __init__(
             self,
-            list:     list[str]       = [],
+            list:     t.List[str]     = [],
             codename: t.Optional[str] = None
     ) -> None:
         """Initialize this SourcesList."""
@@ -187,7 +187,7 @@ pkgCacheGen::Essential "none";
 Dir::Etc::Trusted "{directory}/etc/trusted.gpg";
 '''
 
-def apt_keyring(keys: list[str]) -> bytes:
+def apt_keyring(keys: t.List[str]) -> bytes:
     """
     Download the requested keys if necessary and export them as a keyring
     suitable for passing to APT.
@@ -234,7 +234,8 @@ def cache_apt_root(apt_root: Path, destination_zip: Path) -> None:
         if temporary_zip_path is not None and temporary_zip_path.exists():
             temporary_zip_path.unlink()
 
-def setup_local_apt(directory: Path, list: SourcesList, keys: list[str]) -> Apt:
+def setup_local_apt(directory: Path, list: SourcesList, keys: t.List[str]) \
+    -> Apt:
     """
     Create files and directories necessary for running APT without root rights
     inside 'directory'.
@@ -282,7 +283,7 @@ def setup_local_apt(directory: Path, list: SourcesList, keys: list[str]) -> Apt:
     return apt
 
 @contextmanager
-def local_apt(list: SourcesList, keys: list[str]) -> t.Iterator[Apt]:
+def local_apt(list: SourcesList, keys: t.List[str]) -> t.Iterator[Apt]:
     """
     Create a temporary directory with proper local APT configuration in it.
     Yield an Apt object that can be used to issue apt-get commands.
@@ -296,11 +297,11 @@ def local_apt(list: SourcesList, keys: list[str]) -> t.Iterator[Apt]:
 
 def download_apt_packages(
         list:            SourcesList,
-        keys:            list[str],
-        packages:        list[str],
+        keys:            t.List[str],
+        packages:        t.List[str],
         destination_dir: Path,
         with_deps:       bool
-) -> list[str]:
+) -> t.List[str]:
     """
     Set up a local APT, update it using the specified sources.list configuration
     and use it to download the specified packages.