Fix workflow error that's been awhile. (#656)

* Tweaks to help debugging locally

* explicit

* Workaround dask/distributed#4565

As we only intend to use distributed with a single MPI rank
configuration, the test coverage is sufficient after this workaround.

* reenable osx as we have a workaround for the dask error.

* renable compilers

* typo.

* more syntax error.

* add erfa, required by astropy.

* pyerfa

* bound pyerfa version to 1.7.1

* use stock pyerfa as the mislinking to numpy 1.21 is fixed.

* do not run every minute.

* pyerfa must be there?

* bump numpy to 1.20

* '1.20'

.github/workflows/main.yaml

@@ -5,7 +5,7 @@ name: main
 
 on:
   schedule:
-    - cron:  '* * * * 5'   # Runs on every Friday.
+    - cron:  '0 0 * * 5'   # Runs on every Friday.
   push:
     branches: [ '*', $default-branch ]
     tags: ['[0-9]*']   # anything looks like a version.
@@ -25,13 +25,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # Disable os-latest as we run into a dask error for now.
-        # os: [ ubuntu-latest, macos-latest ]
-        os: [ ubuntu-latest ]
-        numpy-version: [ 1.18 ]
+        os: [ ubuntu-latest, macos-latest ]
+        numpy-version: [ '1.20' ]
         python-version: [ 3.8 ]
         include:
-          - {deploy: true, os: ubuntu-latest, numpy-version: 1.18, python-version: 3.8 }
+          - {deploy: true, os: ubuntu-latest, numpy-version: '1.20', python-version: 3.8 }
     steps:
 
     - name: Checkout source code
@@ -70,16 +68,15 @@ jobs:
         pip install coveralls
         # install nbodykit itself
         pip install .[extras]
+        conda list --explicit
 
-#    - name: Install Compilers For OSX
-#      if: ${{ runner.os == "macOS" }}
-#      run: |
-#        conda install -q -y clang_osx-64 clangxx_osx-64 gfortran_osx-64
-
-#    - name: Install Compilers For Linux
-#      if: ${{ runner.os == "Linux" }}
-#      run: |
-#        conda install -q -y gcc_linux-64 gxx_linux-64 gfortran_linux-64
+    - name: Install Compilers
+      run: |
+        if [ "$RUNNER_OS" == "macOS" ]; then
+          conda install -q -y clang_osx-64 clangxx_osx-64 gfortran_osx-64
+        else
+          conda install -q -y gcc_linux-64 gxx_linux-64 gfortran_linux-64
+        fi
 
     - name: Python Unit tests
       run: |

nbodykit/tests/test_distributed.py

@@ -5,9 +5,13 @@
 import pytest
 
 def setup():
-    from distributed import LocalCluster, Client
-    cluster = LocalCluster(n_workers=1, threads_per_worker=1, processes=False)
-    use_distributed(Client(cluster))
+    # only initializes the local cluster this on the root rank.
+    # all unit tests in this file must be protected by MPITest([1]).
+    from mpi4py import MPI
+    if MPI.COMM_WORLD.rank == 0:
+        from distributed import LocalCluster, Client
+        cluster = LocalCluster(n_workers=1, threads_per_worker=1, processes=False)
+        use_distributed(Client(cluster))
 
 def teardown():
     from mpi4py import MPI
@@ -19,13 +23,10 @@ def test_pickle(comm):
     cat = UniformCatalog(1e-3, 512, comm=comm)
     ss = pickle.dumps(cat)
     cat2 = pickle.loads(ss)
-    
+
     assert_array_equal(cat['Position'], cat2['Position'])
 
-import distributed
 
-@pytest.mark.xfail(distributed.__version__ in ['2021.03.0',],
-    reason="https://github.com/dask/distributed/issues/4565")
 @MPITest([1])
 def test_save(comm):
     cat = UniformCatalog(1e-3, 512, comm=comm)

requirements.txt

@@ -1,6 +1,7 @@
 numpy
 scipy
 astropy
+pyerfa
 mpi4py
 six
 runtests