# [ICON4Py] Small CI improvements

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- Shaped by: Magdalena
- Appetite (FTEs, weeks):
- Developers: <!-- Filled in at the betting table unless someone is specifically required here -->

## Problem
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Goal: Reduce Feedback time for developers on CI.

## Appetite
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## Solution
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- Apply the pattern for conditional session execution from gt4py ([PR-1982](https://github.com/GridTools/gt4py/pull/1982)) to icon4py.
- copy `noxfile_utils.py` from gt4py,
- adapt session configuration: (use `paths` and `paths_ignore` from the `tach` configuration in `icon4py` )

- Simple version of Multinode test on CI
- [PR-692](https://github.com/C2SM/icon4py/pull/692)
- runs MPI test for CPU backends within the container
- FIX the configuration issue (SLURM_NTASKS:4 needed by container openmpi, but then the mpirun task is scheduled 4 times)
- schedule the `distributed` pipeline nightly

**Optional:**

- finish setup of github runners [Draft PR-726](https://github.com/C2SM/icon4py/pull/726)

## Rabbit holes
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## No-gos
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## Progress
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- [ ] Task 1: Conditional test selection for ICON4py (on hold, waiting for changes in GT4PY)

- [ ] Task 2: Multinode tests [PR-692](https://github.com/C2SM/icon4py/pull/692)
- [ ] Task 3: Github runners [PR-726](https://github.com/C2SM/icon4py/
- [x] setup actions for unit tests
- [x] Make grid files available