Added copy_file function

Signed-off-by: Victor Moene <victor.moene@northern.tech>

cf_remote/commands.py

@@ -1,6 +1,5 @@
 from datetime import datetime
 import os
-import shutil
 import sys
 import time
 from multiprocessing.dummy import Pool
@@ -23,6 +22,7 @@
     cf_remote_packages_dir,
 )
 from cf_remote.utils import (
+    copy_file,
     mkdir,
     save_file,
     strip_user,
@@ -308,11 +308,7 @@ def _iterate_over_packages(tags=None, version=None, edition=None, download=False
 
                     filename = os.path.basename(artifact.url)
                     output_path = os.path.join(output_dir, filename)
-                    tmp_filename = '.{}.tmp'.format(filename)
-                    tmp_output_path = os.path.join(output_dir, tmp_filename)
-
-                    shutil.copyfile(package_path, tmp_output_path) 
-                    os.rename(tmp_output_path, output_path)
+                    copy_file(package_path, output_path)
             else:
                 print(artifact.url)
     return 0

cf_remote/utils.py

@@ -1,4 +1,5 @@
 import os
+import shutil
 import sys
 import re
 import json
@@ -202,3 +203,13 @@ def whoami():
 def print_progress_dot(*args):
     print(".", end="")
     sys.stdout.flush()  # STDOUT is line-buffered
+
+def copy_file(input_path, output_path) :
+    filename = os.path.basename(input_path)
+    output_dir = os.path.dirname(output_path)
+
+    tmp_filename = '.{}.tmp'.format(filename)
+    tmp_output_path = os.path.join(output_dir, tmp_filename)
+
+    shutil.copyfile(input_path, tmp_output_path) 
+    os.rename(tmp_output_path, output_path)