add exts_formatter param to allow formatting extension names in module files

[smoors]

param exts_formatter allows to format extension names in module files for PythonPackage, PythonBundle, and Python easyblocks.

by default, partially normalize the names: replace _ with -, but keep ., as was agreed during a previous conf call: https://github.com/easybuilders/easybuild/wiki/Conference-call-notes-20260211

will do nothing without companion framework PR (so can be safely merged)

• format extension names in module files with exts_formatter function easybuild-framework#5186

[smoors]

Test report by @smoors

Overview of tested easyconfigs (in order)

• SUCCESS flit-core-3.12.0-GCCcore-14.2.0.eb

Build succeeded for 1 out of 1 (total: 23 secs) (1 easyconfigs in total)
node711.hydra.os - Linux Rocky Linux 9.7, x86_64, AMD EPYC 9535 64-Core Processor (zen5), Python 3.9.25
See https://gist.github.com/smoors/6e5b6fe74f9b20e224e3dac8933cd4d8 for a full test report.

[smoors]

example of what this does:

@@ -12,20 +12,20 @@                                                                              
                                                                                                 
 Included extensions
 ===================                                                                             
-flit_core-3.12.0
+flit-core-3.12.0
 ]==])
  
 whatis([==[Description: This provides a PEP 517 build backend for packages using Flit.]==])
 whatis([==[Homepage: https://pypi.org/project/flit]==])
 whatis([==[URL: https://pypi.org/project/flit]==])
-whatis([==[Extensions: flit_core-3.12.0]==])
+whatis([==[Extensions: flit-core-3.12.0]==])
  
 local root = "/scratch/brussel/vo/000/bvo00005/vsc10009/ebtest/testnormalize/software/flit-core/3.12.0-GCCcore-14.2.0"
  
 conflict("flit-core")
  
 if convertToCanonical(LmodVersion()) >= convertToCanonical("8.2.8") then
-    extensions("flit_core/3.12.0")
+    extensions("flit-core/3.12.0")
 end
  
  
@@ -40,5 +40,5 @@
  
 prepend_path("EBPYTHONPREFIXES", root)
 -- Built with EasyBuild version 5.3.1.dev0-r7691c52d99cfcc202f794e3d3c752b300f1a76e6
-setenv("EBEXTSLISTFLITMINCORE", "flit_core-3.12.0")
+setenv("EBEXTSLISTFLITMINCORE", "flit-core-3.12.0")

[boegel]

@smoors Can we add a unit test for this function specifically?

Ideally it uses a couple of real-world cases, like flit_core, and also includes at least one case which features multiple subsequent underscores`, since currently:

>>> name = 'flit__core'
>>> REGEX_PIP_PARTIAL_NORMALIZE.sub('-', name).lower()
'flit-core'

(not sure if that's intentional?)

[smoors]

(not sure if that's intentional?)

yes, that's intentional
see also https://packaging.python.org/en/latest/specifications/name-normalization/

[boegel]

OK, good, then we can make that clear in the test for partial_normalize_pip.

[smoors]

test added (and regex fixed)