test: remove redundant NIGHTLY run from CircleCI (#446)

Eventually we will want to migrate these to Kokoro (or even GitHub actions using https://github.com/google-github-actions/auth) but just remove the broken session for now. The prerelease run is redundant with the session we recently added, so replace it with a session using the latest released pandas via conda.

The reason we're not removing the conda sessions completely is that pandas recommends installation via conda/mamba. Since pandas-gbq is an optional dependency of pandas, we need to ensure this package is also always installable via conda/mamba.

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- [x] Make sure to open an issue as a [bug/issue](https://github.com/googleapis/python-bigquery-pandas/issues/new/choose) before writing your code!  That way we can discuss the change, evaluate designs, and agree on the general idea
- [x] Ensure the tests and linter pass
- [x] Code coverage does not decrease (if any source code was changed)
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Fixes #424 🦕

Author: tswast

.circleci/config.yml

@@ -7,20 +7,20 @@ jobs:
   # Conda
   "conda-3.7":
     docker:
-      - image: continuumio/miniconda3
+      - image: mambaorg/micromamba
     environment:
       PYTHON: "3.7"
       PANDAS: "0.24.2"
     steps:
       - checkout
       - run: ci/config_auth.sh
       - run: ci/run_conda.sh
-  "conda-3.9-NIGHTLY":
+  "conda-3.9":
     docker:
-      - image: continuumio/miniconda3
+      - image: mambaorg/micromamba
     environment:
       PYTHON: "3.9"
-      PANDAS: "NIGHTLY"
+      PANDAS: "1.3.4"
     steps:
       - checkout
       - run: ci/config_auth.sh
@@ -31,4 +31,4 @@ workflows:
   build:
     jobs:
       - "conda-3.7"
-      - "conda-3.9-NIGHTLY"
+      - "conda-3.9"

ci/requirements-3.9-NIGHTLY.conda renamed to ci/requirements-3.9-1.3.4.conda

@@ -1,10 +1,13 @@
+codecov
+coverage
 db-dtypes
-pydata-google-auth
+fastavro
+flake8
 google-cloud-bigquery
 google-cloud-bigquery-storage
+numpy
 pyarrow
+pydata-google-auth
 pytest
 pytest-cov
-codecov
-coverage
-flake8
+tqdm

ci/run_conda.sh

@@ -6,25 +6,16 @@
 set -e -x
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )"
 
-# Install dependencies using Conda
+eval "$(micromamba shell hook --shell=bash)"
+micromamba activate
 
-conda config --set always_yes yes --set changeps1 no
-conda config --add channels pandas
-conda config --add channels conda-forge
-conda update -q conda
-conda info -a
-conda create -q -n test-environment python=$PYTHON
-source activate test-environment
+# Install dependencies using (micro)mamba
+# https://github.com/mamba-org/micromamba-docker
 REQ="ci/requirements-${PYTHON}-${PANDAS}"
-conda install -q --file "$REQ.conda";
-
-if [[ "$PANDAS" == "NIGHTLY" ]]; then
-  conda install -q numpy pytz python-dateutil;
-  PRE_WHEELS="https://7933911d6844c6c53a7d-47bd50c35cd79bd838daf386af554a83.ssl.cf2.rackcdn.com";
-  pip install --pre --upgrade --timeout=60 -f $PRE_WHEELS pandas;
-else
-  conda install -q pandas=$PANDAS;
-fi
+micromamba install -q pandas=$PANDAS python=${PYTHON} -c conda-forge;
+micromamba install -q --file "$REQ.conda" -c conda-forge;
+micromamba list
+micromamba info
 
 python setup.py develop --no-deps