caching LaTeX files to speedup build

.github/workflows/make.yml

@@ -16,19 +16,33 @@ jobs:
       - name: print start date
         run: date +%Y-%m-%d_%H:%M
 
-      - name: Checkout repository
+      - name: checkout repository
         uses: actions/checkout@v4
         with:
           persist-credentials: false
           fetch-depth: 1 # 0 if you want to push to repo
 
-      - name: Python set up
+      - name: caching LaTeX output
+        uses: actions/cache@v4
+        with:
+          path: |
+            chapters/*.aux
+            hpmor*.aux
+            hpmor*.fdb_latexmk
+            hpmor*.fls
+            hpmor*.out
+            hpmor*.pdf
+            hpmor*.toc
+            hpmor*.xdv
+          key: tex-cache
+
+      - name: python set up
         uses: actions/setup-python@v5
         with:
           python-version: "3.10"
           # cache: "pip"
 
-      - name: Python cache set up
+      - name: python cache set up
         uses: actions/cache@v4
         with:
           path: ${{ env.pythonLocation }}
@@ -39,10 +53,10 @@ jobs:
       #     pwd
       #     ls -al
 
-      - name: Check of chapters for known issues
+      - name: check of chapters for known issues
         run: python3 scripts/check_chapters.py
 
-      - name: Check pre-commit tests
+      - name: check pre-commit tests
         uses: pre-commit/[email protected]
 
       - name: install requirements