Eliminate package install during fx workspace import

openfl/interface/workspace.py

@@ -10,10 +10,7 @@
 import sys
 import tempfile
 from hashlib import sha256
-from os import chdir
-from os.path import basename, isfile
 from pathlib import Path
-from shutil import copyfile, copytree, ignore_patterns, unpack_archive
 from subprocess import check_call  # nosec
 from sys import executable
 from typing import Tuple, Union
@@ -71,7 +68,7 @@ def create_dirs(prefix):
     (prefix / "save").mkdir(parents=True, exist_ok=True)  # model weight saves / initialization
     (prefix / "src").mkdir(parents=True, exist_ok=True)  # model code
 
-    copyfile(WORKSPACE / "workspace" / ".workspace", prefix / ".workspace")
+    shutil.copyfile(WORKSPACE / "workspace" / ".workspace", prefix / ".workspace")
 
 
 def create_temp(prefix, template):
@@ -84,11 +81,11 @@ def create_temp(prefix, template):
 
     echo("Creating Workspace Templates")
 
-    copytree(
+    shutil.copytree(
         src=WORKSPACE / template,
         dst=prefix,
         dirs_exist_ok=True,
-        ignore=ignore_patterns("__pycache__"),
+        ignore=shutil.ignore_patterns("__pycache__"),
     )  # from template workspace
 
 
@@ -140,7 +137,7 @@ def create(prefix, template):
 
     requirements_filename = "requirements.txt"
 
-    if isfile(f"{str(prefix)}/{requirements_filename}"):
+    if os.path.isfile(f"{str(prefix)}/{requirements_filename}"):
         check_call(
             [
                 executable,
@@ -172,37 +169,14 @@ def create(prefix, template):
 @option(
     "--archive",
     required=True,
-    help="Zip file containing workspace to import",
+    help="Path to workspace archive.",
     type=ClickPath(exists=True),
 )
 def import_(archive):
-    """Import federated learning workspace.
-
-    Args:
-        archive: The archive file containing the workspace to import.
-    """
-
-    archive = Path(archive).absolute()
-
-    dir_path = basename(archive).split(".")[0]
-    unpack_archive(archive, extract_dir=dir_path)
-    chdir(dir_path)
-
-    requirements_filename = "requirements.txt"
-
-    if isfile(requirements_filename):
-        check_call(
-            [executable, "-m", "pip", "install", "--upgrade", "pip"],
-            shell=False,
-        )
-        check_call(
-            [executable, "-m", "pip", "install", "-r", "requirements.txt"],
-            shell=False,
-        )
-    else:
-        echo("No " + requirements_filename + " file found.")
-
-    echo(f"Workspace {archive} has been imported.")
+    """Import a federated learning workspace generated by `fx workspace export`."""
+    dir_path = os.path.basename(os.path.abspath(archive)).split(".")[0]
+    shutil.unpack_archive(archive, extract_dir=dir_path)
+    echo(f"Imported workspace `{archive}`.")
     echo("You may need to copy your PKI certificates to join the federation.")