string folding / unfolding [question]

[jabbalaci]

I found this project because I needed string folding / unfolding, i.e. convert "node[1-3]" to a list of strings (["node1", "node2", "node3"]) and vice versa. Actually, I needed it for URLs.

I included ClusterShell in my project but I figured out later that it doesn't exist for Windows :( And I develop a cross-platform software. Could someone, who knows well ClusterShell from inside, give me a hint how I could extract just the string (un)folding part? Or do you know a project that can do this advanced string manipulation?

Thanks.

[jabbalaci]

I've found the answer. For string folding / unfolding, we need these 4 files only:

• Defaults.py
• NodeSet.py
• NodeUtils.py
• RangeSet.py

They also work under Windows for string (un)folding.

[thiell]

Hi @jabbalaci -
Yes this part of the code is localized to these modules, you did well. Are you using some kind of Python package manager on Windows like pip? If so, would it help if ever we decided to separate this part under a clustershell-nodeset subpackage that could be installed without the rest?

[jabbalaci]

Hi,
Thanks for the answer. Yes, I tried to install it with pip. The problem was here:

clustershell/setup.py

Line 26 in 805dd0c

if os.geteuid() == 0:

, os.geteuid() doesn't work under Windows.
Well, a platform-independent separate package that would do string (un)folding would be useful. As I said, I don't do Linux clustering at all. However, your string (un)folding implementation works well with general strings too, thus this part could be generalized and put into a sub-package.

[degremont]

I think we should be able to fix setup.py in order to fix pip issue under Windows.
Likely Task and Workers classes won't work with Windows but this should be enough to install ClusterShell and use the classes you are looking for.
This will avoid having to maintain a separated package and project.

[jabbalaci]

@degremont : it's also a good solution. There's no need to slice the project.

[degremont]

@jabbalaci Could you confirm that, if you remove the os.getuid() call in setup.py you can successfully install ClusterShell through pip on windows, and use NodeSet class?

[jabbalaci]

@degremont : I tried that and it works like that under Windows. That is, I removed the os.getuid() call and left only CFGDIR = 'etc/clustershell'. Then I could install under Windows and use the NodeSet class.