improve deploy workflow

No need to install `osmg` again to get its version, we can directly
query PyPI.

.github/workflows/test_and_deploy.yaml

@@ -39,8 +39,7 @@ jobs:
       - name: Check the current version on PyPi
         id: version_step_pypi
         run: |
-          python -m pip install osmg --upgrade
-          latest=$(pip show osmg | grep 'Version:' | awk '{print $2}')
+          latest=$(python src/osmg/get_latest_pypi_version.py)
           echo "Latest Version found on PyPi: $latest"
           echo "PYPI_VERSION=$latest" >> $GITHUB_ENV
       - name: Check the current version on setup.cfg
@@ -50,6 +49,7 @@ jobs:
           echo "Version found in setup.cfg: $version"
           echo "SETUPCFG_VERSION=$version" >> $GITHUB_ENV
       - name: Prepare package
+        if: ${{ env.PYPI_VERSION != env.SETUPCFG_VERSION }}
         run: |
             python -m pip install --upgrade pip setuptools wheel twine
             python setup.py sdist bdist_wheel

src/osmg/get_latest_pypi_version.py

@@ -0,0 +1,20 @@
+import requests
+
+
+def get_latest_version(package_name):
+    url = f"https://pypi.org/pypi/{package_name}/json"
+
+    try:
+        response = requests.get(url)
+        package_info = response.json()
+        latest_version = package_info['info']['version']
+        return latest_version
+    except Exception as e:
+        print(f"An error occurred: {e}")
+        return None
+
+
+if __name__ == '__main__':
+    package = 'osmg'
+    version = get_latest_version(package)
+    print(version)