CCPP Framework Meeting Minutes 2025 09 18

Agenda

• GitHub issues/PRs
• New items
• Updates
• Other business
• notes

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Attendees: Michael Kavulich, Jesse Nusbaumer, Cheryl Craig, Jordan Powers, RhaeSung Kim, Dustin Swales, Courtney Peverley

GitHub issues, PRs, discussions

• Handling for module-level dimension variables for interstitial variables #683

  • Fixes Errors when integer variable is output from one phase and used as an interstitial dimension in another Issue#681
  • Needs NOAA approval

• Check Fortran imports to locate unknown DDT #684

  • Alternative to DRAFT: Skip variable parse checks during fortran parsing #673

Drafts/On Hold

• DRAFT: Skip variable parse checks during fortran parsing #673

Capgen project board

• No new issues

New items for discussion

• Issue backlog/triage
  • Add "number of instances" dimension to module-level variables to support multi-instance usage #561
    • Last time decided we needed Dom's input
  • Fortran parser must report error in dimension string correctly #362
  • CCPP Framework to provide API calls for suite inspection by host #380
    • Fixed by Capgen cleanup #493?

Updates from last time

Previous notes

Other business

Meeting notes

• Module-level dimension variables for interstitial variables (#683)
  • Dustin to review
• Check fortran imports to locate unknown DDT (#684)
  • Needs review from all parties
  • Alternative to #673
• Issue #685 - change relative_path to dependency_path
  • Not urgent, but keeps names clearer/more consistent
  • Dom added “post-capgen-unification” label

Capgen unification project board

• No new issues or PRs in the last two weeks
• Dustin working on SCM; merging forward
  • Will break things up into PRs once it’s running (or might be one PR with a couple fixes)
• Dom, Dustin, Courtney, Steve meet every other Monday
  • Spoke about capgen unification
    • Plan is that once it’s working in SCM, Dom will try it out in NRL, which will get it closer to UFS

Backlog

• Add “number of instances” dimension to module-level variables to support multi-instance usage - #561
  • Will be needed for Neptune generally, but maybe not the constituent handling
  • Dom will open more specific issue(s) when he gets there
  • Previous issue for capgen
• Fortran parser must report error in dimension string correctly - #362
  • Unclear it’s still an issue; but not super high priority
  • What do we do with low-priority issues that will probably just be lost if we keep them open but they’re low priority?
    • Ice boxing - Michael K to set up
  • Dom to verify that the issue is still an issue
• CCPP framework to provide API calls for suite inspection by host - #380
  • Datatable should be able to provide this information, but UFS/SCM doesn’t use that (yet)
  • Dom - related issue - splitting namelist options and attaching them to the schemes themselves
    • Jesse - SIMA basically does this
    • Dom - Should namelist reading be done by scheme?
  • Table until post-capgen-unification (labeled as such)

Additional Discussion

• Dom: UFS testing - one of the issues is you can’t test a ccpp component standalone because the dependent pieces of code live in different repositories
  • Maybe we could pull out the ccpp subdirectory in FV3 with the ddts, etc - could be it’s own entity