ci: Improve robustness of aider version check in CI

.github/workflows/check_pypi_version.yml

@@ -25,12 +25,28 @@ jobs:
       - name: Get installed aider version
         id: installed_version
         run: |
+          set -x # Enable debugging output
           aider_version_output=$(aider --version)
+          if [ $? -ne 0 ]; then
+            echo "Error: 'aider --version' command failed."
+            exit 1
+          fi
+          echo "Raw aider --version output: $aider_version_output"
+
           # Extract version number (assuming format "aider vX.Y.Z")
           aider_version=$(echo "$aider_version_output" | grep -oP 'v\d+\.\d+\.\d+')
+
+          # Check if grep found anything
+          if [ -z "$aider_version" ]; then
+            echo "Error: Could not extract version using grep -oP 'v\d+\.\d+\.\d+' from output: $aider_version_output"
+            exit 1
+          fi
+
           echo "Installed aider version: $aider_version"
           # Remove 'v' prefix for comparison
-          echo "version=${aider_version#v}" >> $GITHUB_OUTPUT
+          version_num=${aider_version#v}
+          echo "Extracted version number: $version_num"
+          echo "version=$version_num" >> $GITHUB_OUTPUT
 
       - name: Check out code
         uses: actions/checkout@v4