Add environment file to build docs workflow

Author: antonwolfy

.github/workflows/build-sphinx.yml

@@ -36,11 +36,11 @@ jobs:
       pull-requests: write
 
     env:
-      python-ver: '3.12'
-      CHANNELS: '-c dppy/label/dev -c intel -c conda-forge --override-channels'
-      NO_INTEL_CHANNELS: '-c dppy/label/dev -c conda-forge --override-channels'
-      # Install the latest oneAPI compiler to work around an issue
-      INSTALL_ONE_API: 'yes'
+      env-file: '${{ github.workspace }}/env.yml'
+      base-doc-env: 'environments/base_build_docs.yml'
+      build-pkgs-env: ''
+      # Enable env when it's required to use only conda packages without OneAPI installation
+      # build-pkgs-env: 'environments/build_pkgs.yml'
 
     steps:
       - name: Cancel Previous Runs
@@ -101,16 +101,22 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Install conda-merge tool
+        uses: BSFishy/pip-action@8f2d471d809dc20b6ada98c91910b6ae6243f318 # v1
+        with:
+          packages: |
+            conda-merge ${{ env.base-doc-env }} ${{ env.build-pkgs-env }} > ${{ env.env-file }}
+            cat ${{ env.env-file }}
+
       - name: Setup miniconda
         id: setup_miniconda
         continue-on-error: true
         uses: conda-incubator/setup-miniconda@d2e6a045a86077fb6cad6f5adf368e9076ddaa8d # v3.1.0
         with:
           miniforge-version: latest
           use-mamba: 'true'
-          channels: conda-forge
           conda-remove-defaults: 'true'
-          python-version: ${{ env.python-ver }}
+          environment-file: '${{ env.env-file }}'
           activate-environment: 'docs'
 
       - name: ReSetup miniconda
@@ -119,35 +125,10 @@ jobs:
         with:
           miniforge-version: latest
           use-mamba: 'true'
-          channels: conda-forge
           conda-remove-defaults: 'true'
-          python-version: ${{ env.python-ver }}
+          environment-file: '${{ env.env-file }}'
           activate-environment: 'docs'
 
-      # Sometimes `mamba install ...` fails due to slow download speed rate, so disable the check in mamba
-      - name: Disable speed limit check in mamba
-        run: echo "MAMBA_NO_LOW_SPEED_LIMIT=1" >> $GITHUB_ENV
-
-      - name: Install sphinx dependencies
-        run: |
-          mamba install sphinx sphinx_rtd_theme
-          pip install sphinxcontrib-googleanalytics==0.4 \
-            pyenchant sphinxcontrib-spelling
-
-      - name: Install dpnp dependencies
-        if: env.INSTALL_ONE_API == 'yes'
-        run: |
-          mamba install numpy dpctl">=0.18.0dev0" cmake cython pytest ninja scikit-build ${{ env.NO_INTEL_CHANNELS }}
-
-      - name: Install dpnp dependencies
-        if: env.INSTALL_ONE_API != 'yes'
-        run: |
-          mamba install numpy dpctl">=0.18.0dev0" mkl-devel-dpcpp onedpl-devel tbb-devel dpcpp_linux-64 \
-              cmake cython pytest ninja scikit-build ${{ env.CHANNELS }}
-
-      - name: Install cuPy dependencies
-        run: mamba install cupy
-
       - name: Conda info
         run: mamba info
 
@@ -178,7 +159,6 @@ jobs:
           echo PROJECT_NUMBER=${PROJECT_NUMBER}
           echo "PROJECT_NUMBER=$PROJECT_NUMBER" >> $GITHUB_ENV
 
-      # https://github.com/marketplace/actions/doxygen-action
       - name: Build backend docs
         uses: mattnotmitt/doxygen-action@cbe72c8e402e8a3faa1f0b247ef90aa6c8e4ce74 # v1.9.8
         with:
@@ -187,7 +167,6 @@ jobs:
       - name: Copy backend docs
         run: cp -r dpnp/backend/doc/html ${{ env.PUBLISH_DIR }}/backend_doc
 
-      # https://github.com/marketplace/actions/github-pages-action
       # The step is only used to build docs while pushing a PR to "master"
       - name: Deploy docs
         if: env.GH_EVENT_PUSH_UPSTREAM == 'true'

environments/base_build_docs.txt

@@ -0,0 +1,3 @@
+pyenchant==3.2.2
+sphinxcontrib-googleanalytics==0.4
+sphinxcontrib-spelling==8.0.1

environments/base_build_docs.yml

@@ -0,0 +1,18 @@
+name: Base building docs env
+channels:
+  - dppy/label/dev
+  - conda-forge
+dependencies:
+  - python=3.12
+  - cmake
+  - cupy
+  - cython
+  - dpctl>=0.19.0dev0
+  - ninja
+  - numpy
+  - pytest
+  - scikit-build
+  - sphinx
+  - sphinx_rtd_theme
+  - pip:
+    - -r base_build_docs.txt

environments/build_pkgs.yml

@@ -0,0 +1,8 @@
+name: Packages to build DPNP
+channels:
+  - https://software.repos.intel.com/python/conda/
+dependencies:
+  - dpcpp_linux-64
+  - mkl-devel-dpcpp
+  - onedpl-devel
+  - tbb-devel