revert back to reusing build code, and set FAST_DOCS based on job type

Author: zulissimeta

.github/workflows/build_docs.yml

@@ -38,6 +38,13 @@ jobs:
       env:
         QUACC_CONFIG_FILE: docs/.quacc.yml
         HF_TOKEN: ${{ secrets.HF_TOKEN }}
-        FAST_DOCS: true
+        # Set FAST_DOCS only if not a push to main
+        FAST_DOCS: ${{ (github.event_name != 'push' || github.ref != 'refs/heads/main') && 'true' || '' }}
       run: |
         jupyter-book build docs
+
+    - name: Upload documentation artifact
+      uses: actions/upload-artifact@v4
+      with:
+        name: docs-html
+        path: docs/_build/html/*

.github/workflows/deploy_docs.yml

@@ -9,42 +9,12 @@ on:
 
 jobs:
   build:
-    runs-on: 4-core-ubuntu-gpu-t4
+    uses: ./.github/workflows/build_docs.yml
+    secrets: inherit
 
-    steps:
-    - name: Checkout PR code
-      uses: actions/checkout@v4
-      with:
-        ref: ${{ github.event.pull_request.head.sha }}
-        fetch-depth: 0
-
-    - name: Install pandoc
-      run: sudo apt-get -y install pandoc
-
-    # Install dependencies
-    - name: Set up Python
-      uses: actions/setup-python@v5
-      with:
-        python-version: 3.12
-
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install -e packages/fairchem-core[docs,adsorbml,quacc] -e packages/fairchem-data-oc[dev] -e packages/fairchem-applications-cattsunami
-
-    # Build the book
-    - name: Build the book
-      env:
-        QUACC_CONFIG_FILE: docs/.quacc.yml
-        HF_TOKEN: ${{ secrets.HF_TOKEN }}
-      run: |
-        jupyter-book build docs
-
-    - name: Upload documentation artifact
-      uses: actions/upload-artifact@v4
-      with:
-        name: docs-html
-        path: docs/_build/html/*
+  deploy:
+    needs: build
+    runs-on: ubuntu-latest
 
   deploy:
     needs: build