ci: Handle errors in mdbook.

.github/workflows/deploy-book.yml

@@ -28,9 +28,10 @@ jobs:
           echo `pwd`/mdbook >> $GITHUB_PATH
       - name: Build Book
         run: |
-          # This assumes your book is in the root of your repository.
-          # Just add a `cd` here if you need to change to another directory.
-          mdbook build ./pywr-book
+          output=$(mdbook build ./pywr-book 2>&1)
+          if echo "$output" | grep -q "\[ERROR\]" ; then
+              exit 1
+          fi
       - name: Setup Pages
         uses: actions/configure-pages@v5
       - name: Upload artifact

.github/workflows/linux.yml

@@ -35,8 +35,17 @@ jobs:
         run: cargo build --verbose --features highs,cbc --workspace --exclude ipm-simd --exclude pywr-python
       - name: Run tests
         run: cargo test --features highs,cbc --verbose --lib --bins -- --test-threads=1
-      - name: Run mdbook tests
-        run: mdbook test ./pywr-book
+      - name: Run mdbook test & build
+        run: |
+          output=$(mdbook test ./pywr-book 2>&1)
+          if echo "$output" | grep -q "\[ERROR\]" ; then
+              exit 1
+          fi
+
+          output=$(mdbook build ./pywr-book 2>&1)
+          if echo "$output" | grep -q "\[ERROR\]" ; then
+              exit 1
+          fi
 
   build_schema_only: