allow pre file install check script to be as python version agnostic … (

#2612) (#2614)

* allow pre file install check script to be as python version agnostic as possible.

CHANGES.md

@@ -10,6 +10,15 @@ updated. Only the first match gets replaced, so it's fine to leave the old
 ones in. -->
 --------------------------------------------------------------------------------
 
+## 2.0.1 (<span actions:bind='release-date'>Released 2022-07-28</span>)
+
+### Fixes
+
+[#2612](https://github.com/metomi/rose/pull/2612) - Allows the pre
+remote install checks to use any Python version >= 2.7.
+
+--------------------------------------------------------------------------------
+
 ## 2.0.0 (<span actions:bind='release-date'>Released 2022-07-28</span>)
 
 For use with Cylc, see [Cylc-Rose](https://github.com/cylc/cylc-rose).

metomi/rose/loc_handlers/rsync.py

@@ -61,7 +61,7 @@ def parse(self, loc, _):
         # Attempt to obtain the checksum(s) via "ssh"
         host, path = loc.name.split(":", 1)
         cmd = self.manager.popen.get_cmd(
-            "ssh", host, "python3", "-", path, loc.TYPE_BLOB, loc.TYPE_TREE
+            "ssh", host, "python", "-", path, loc.TYPE_BLOB, loc.TYPE_TREE
         )
         with open(rsync_remote_check_file, 'r') as stdin:
             out = self.manager.popen(*cmd, stdin=stdin)[0]

metomi/rose/loc_handlers/rsync_remote_check.py

@@ -25,20 +25,27 @@
 Warning:
     This script will not necessarily be run in the Rose Python environment.
     It should not have any dependencies outside of the stdlib and should be
-    compatible with as wide a range of Python3 versions as possible.
+    compatible with as wide a range of Python versions as possible.
 
 """
+from __future__ import print_function
 import os
 import sys
 
 
 def main(path, str_blob, str_tree):
     """Check file exists and print some info:
 
-    1. Octal protection bits.
-    2. Last modified time.
-    3. Filesize.
-    4. Path, which has been checked.
+    Args:
+        path (str): Path to a file or directory.
+        str_blob: return this string if path is a file. Default='blob'
+        str_tree: return this string if path is a directory. Default='tree'
+
+    Prints:
+        1. Access Mode information.
+        2. Last modified time.
+        3. Filesize.
+        4. Path, which has been checked.
     """
     if os.path.isdir(path):
         print(str_tree)