rose-arch add option to exclude file matching a pattern

[ColemanTom]

I was wondering if rose-arch could be extended to exclude files matching a glob pattern? I have not looked into how rose-arch works, but with tar at least, you can use the --exclude option to exclude patterns. I think this would be a useful addition so you could archive a directory and just have some exclude patterns instead of being too specific about which files to include if there is a lot of options.

[oliver-sanders]

I think it's expanding globs Python side using the glob library:

rose/metomi/rose/apps/rose_arch.py

Lines 255 to 262 in d37dd0a

	for source_glob in shlex.split(
	self._get_conf(config, t_node, "source", compulsory=True)
	):
	is_compulsory_source = is_compulsory_target
	if source_glob.startswith("(") and source_glob.endswith(")"):
	source_glob = source_glob[1:-1]
	is_compulsory_source = False
	paths = glob(source_prefix + source_glob)

(But I'm not familiar with this code)

If that's right, then we should be able to do whatever we want with this.

Sadly, there isn't any implementation of extglob in the Python standard library, but we could have a separate exclusion glob to filter by.

Possibly worth mentioning fnamematch which is a drop in replacement for Python's glob which extends the syntax a little which might be useful for fine control over inclusion/exclusion.