Switch to micromamba

.ci/build/conda.py

@@ -1,7 +1,9 @@
 import subprocess
 import sys
 
+conda = sys.argv[1] if len(sys.argv) >= 2 else "conda"
+
 subprocess.check_call([
-    "conda", "install", "--yes", "-c", "conda-forge",
+    conda, "install", "--yes", "-c", "conda-forge",
     "boost", "cmake", "ninja", "numpy", "pybind11", "scipy", "xsimd",
     "xtensor", "xtensor-python"])

.github/workflows/build.yml

@@ -18,19 +18,10 @@ jobs:
       run:
         shell: bash -l {0}
     steps:
-      - name: Provision (Conda, Ubuntu)
-        # conda is initialized in .bashrc, but we are not using a login shell
-        run: echo 'export PATH="/usr/share/miniconda/bin:$PATH"' >> $HOME/.bash_profile
-        if: ${{ matrix.packaging == 'conda' && contains(matrix.os, 'ubuntu') }}
-
-      - name: Provision (Conda, Windows)
-        run: C:\Miniconda\condabin\conda.bat init --all
-        shell: pwsh
-        if: ${{ matrix.packaging == 'conda' && contains(matrix.os, 'windows') }}
-
-      - name: Provision (Conda, non-Windows)
-        run: conda init --all
-        if: ${{ matrix.packaging == 'conda' && !contains(matrix.os, 'windows') }}
+      - uses: mamba-org/setup-micromamba@v1
+        with:
+          init-shell: bash powershell
+        if: ${{ matrix.packaging == 'conda' }}
 
       - name: Checkout latest revision
         # Only the latest revision is required, as later steps do not depend on
@@ -43,8 +34,13 @@ jobs:
           git fetch origin --depth=1 ${{ github.ref }}
           git checkout ${{ github.ref_name }}
       
+      - name: Set-up (${{ matrix.packaging }})
+        run: ${{ matrix.python }} .ci/build/${{ matrix.packaging }}.py micromamba
+        if: ${{ matrix.packaging == 'conda' }}
+
       - name: Set-up (${{ matrix.packaging }})
         run: ${{ matrix.python }} .ci/build/${{ matrix.packaging }}.py
+        if: ${{ matrix.packaging != 'conda' }}
 
       - name: Build sycomore
         run: ${{ matrix.python }} ./.ci/build/build.py