Merge pull request matplotlib#23649 from matthewfeickert/ci/switch-nightlies-to-mamba

CI: Use anaconda-client v1.10.0 for upload of nightlies

Author: QuLogic

.github/workflows/nightlies.yml

@@ -11,17 +11,14 @@ jobs:
   upload_nightly_wheels:
     name: Upload nightly wheels to Anaconda Cloud
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash -l {0}
     if: github.repository_owner == 'matplotlib'
 
     steps:
-      - name: Install Python
-        uses: actions/setup-python@v4
-        with:
-          python-version: '3.x'
-
       # c.f. https://github.com/actions/download-artifact/issues/3#issuecomment-1017141067
       - name: Download wheel artifacts from last build on 'main'
-        shell: bash
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
@@ -50,12 +47,14 @@ jobs:
           mv *.whl dist/
           ls -l dist/
 
+        # N.B. anaconda-client is only maintained on the main channel
       - name: Install anaconda-client
-        run: |
-          python -m pip install --upgrade pip setuptools wheel
-          # c.f. https://github.com/Anaconda-Platform/anaconda-client/issues/540
-          python -m pip install git+https://github.com/Anaconda-Server/anaconda-client@be1e14936a8e947da94d026c990715f0596d7043
-          python -m pip list
+        uses: mamba-org/provision-with-micromamba@v12
+        with:
+          environment-file: false
+          environment-name: nightlies
+          extra-specs: anaconda-client=1.10.0
+          channels: main
 
       - name: Upload wheels to Anaconda Cloud as nightlies
         run: |
@@ -65,7 +64,6 @@ jobs:
             dist/matplotlib-*.whl
 
       - name: Remove old uploads to save space
-        shell: bash
         run: |
           N_LATEST_UPLOADS=5
 
@@ -78,6 +76,7 @@ jobs:
 
           if [ -s remove-package-versions.txt ]; then
               while LANG=C IFS= read -r package_version ; do
+                  echo "# Removing scipy-wheels-nightly/matplotlib/${package_version}"
                   anaconda --token ${{ secrets.ANACONDA_ORG_UPLOAD_TOKEN }} remove \
                     --force \
                     "scipy-wheels-nightly/matplotlib/${package_version}"