Use micromamba 1.5.10 where conda is needed

.github/workflows/benchmarks-last-release.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Set up conda environment
         uses: mamba-org/setup-micromamba@v2
         with:
-          micromamba-version: '2.0.2-2'
+          micromamba-version: '1.5.10-0'
           environment-file: ${{env.CONDA_ENV_FILE}}
           environment-name: xarray-tests
           cache-environment: true

.github/workflows/benchmarks.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Set up conda environment
         uses: mamba-org/setup-micromamba@v2
         with:
-          micromamba-version: '2.0.2-2'
+          micromamba-version: '1.5.10-0'
           environment-file: ${{env.CONDA_ENV_FILE}}
           environment-name: xarray-tests
           cache-environment: true
@@ -36,7 +36,7 @@ jobs:
           create-args: >-
             asv
             python-build
-            mamba
+            mamba<=1.5.10
 
 
       - name: Run benchmarks

.github/workflows/ci-additional.yaml

@@ -304,8 +304,6 @@ jobs:
     name: Minimum Version Policy
     runs-on: "ubuntu-latest"
     needs: detect-ci-trigger
-    # disabled until `conda` is compatible with the new `libmambapy`
-    if: false && needs.detect-ci-trigger.outputs.triggered == 'false'
     defaults:
       run:
         shell: bash -l {0}
@@ -318,13 +316,15 @@ jobs:
       - name: Setup micromamba
         uses: mamba-org/setup-micromamba@v2
         with:
-          micromamba-version: ${{env.MICROMAMBA_VERSION}}
+          # run with micromamba 1.5.10 together with conda
+          # conda.api is not API compatible with libmambapy
+          micromamba-version: "1.5.10-0"
           environment-name: xarray-tests
           create-args: >-
             python=3.12
             pyyaml
             python-dateutil
-            libmambapy
+            conda
 
       - name: All-deps minimum versions policy
         run: |

ci/min_deps_check.py

@@ -11,7 +11,7 @@
 from collections.abc import Iterator
 from datetime import datetime
 
-import libmambapy  # type: ignore[import]
+import conda.api  # type: ignore[import]
 import yaml
 from dateutil.relativedelta import relativedelta
 
@@ -93,7 +93,7 @@ def metadata(entry):
 
         return (major, minor), time
 
-    raw_data = libmambapy.SubdirData.query_all(pkg, channels=CHANNELS)
+    raw_data = conda.api.SubdirData.query_all(pkg, channels=CHANNELS)
     data = sorted(metadata(entry) for entry in raw_data if entry.timestamp != 0)
 
     release_dates = {