Use pixi on github action

Author: dirkvdb

.github/workflows/conda-build.yml

@@ -2,35 +2,22 @@ name: Anaconda build
 on: [push]
 
 jobs:
-  build:
-    name: ${{ matrix.os }}
-    runs-on: ${{ matrix.os }}
-    env:
-      GIT_HASH: ${{ github.sha }}
-      GDX_VERSION: 0.14.4
-    strategy:
-      fail-fast: false
-      matrix:
-        os: ["ubuntu-latest", "windows-2022"]
-    steps:
-      - name: Clone repository
-        uses: actions/checkout@v4
-        with:
-          submodules: true
-      - uses: conda-incubator/setup-miniconda@v3
-        with:
-          auto-update-conda: true
-          activate-environment: build
-          python-version: "3.12"
-      - name: create meta.yaml
-        run: python
-      - name: Setup conda forge
-        run: |
-          conda config --add channels conda-forge
-          conda config --set channel_priority strict
-      - name: Install build requirements
-        run: conda install mamba boa jinja2
-      - name: Generate package metadata
-        run: python ./conda/metagen.py
-      - name: Build conda package
-        run: conda mambabuild ./conda
+    build:
+        name: ${{ matrix.os }}
+        runs-on: ${{ matrix.os }}
+        env:
+            GIT_HASH: ${{ github.sha }}
+            GDX_VERSION: 0.14.4
+        strategy:
+            fail-fast: false
+            matrix:
+                os: ["ubuntu-latest", "windows-2022"]
+        steps:
+            - name: Clone repository
+              uses: actions/checkout@v4
+              with:
+                  submodules: true
+            - uses: prefix-dev/setup-pixi@v0.9.4
+            - uses: extractions/setup-just@v3
+            - name: Build conda package
+              run: just pixi_build