ci: add coverage and ruff (#1383)

* add coverage calculation and push

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* new codecov version and usage of token

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* enable ruff formatter instead of black and isort

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* apply ruff lint fixes

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* apply ruff unsafe fixes

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* add removed imports

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* runs 1 on linter issues

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* finalize linter fixes

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* Update pyproject.toml

Co-authored-by: Cesar Berrospi Ramis <75900930+ceberam@users.noreply.github.com>
Signed-off-by: Michele Dolfi <97102151+dolfim-ibm@users.noreply.github.com>

---------

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>
Signed-off-by: Michele Dolfi <97102151+dolfim-ibm@users.noreply.github.com>
Co-authored-by: Cesar Berrospi Ramis <75900930+ceberam@users.noreply.github.com>

.github/workflows/checks.yml

@@ -1,5 +1,13 @@
 on:
   workflow_call:
+    inputs:
+      push_coverage:
+          type: boolean
+          description: "If true, the coverage results are pushed to codecov.io."
+          default: true
+    secrets:
+      CODECOV_TOKEN:
+        required: false        
 
 env:
   HF_HUB_DOWNLOAD_TIMEOUT: "60"
@@ -32,7 +40,13 @@ jobs:
         run: poetry install --all-extras
       - name: Testing
         run: |
-          poetry run pytest -v tests
+          poetry run pytest -v --cov=docling --cov-report=xml tests
+      - name: Upload coverage to Codecov
+        if: inputs.push_coverage
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          file: ./coverage.xml
       - name: Run examples
         run: |
           for file in docs/examples/*.py; do