Refactors 'Clean Old Mega Releases' Step

Updates the mega clean-up step to use the mega-find command to do the brunt of the work.

.gitea/workflows/build.yaml

@@ -584,6 +584,7 @@ jobs:
         id: upload-mega
         run: |
           mega-https on
+          mega-exec psa --discard
           mega-login "${{ secrets.MEGA_EMAIL }}" "${{ secrets.MEGA_PASSWORD }}"
 
           mega-put -c "/workspace/SPT/Build/${{ steps.generate-filename.outputs.build_name }}" "/spt-release/${{ steps.generate-filename.outputs.build_name }}"
@@ -600,48 +601,29 @@ jobs:
         run: |
           mega-https on
           mega-login "${{ secrets.MEGA_EMAIL }}" "${{ secrets.MEGA_PASSWORD }}"
-          
           mega-exec psa --discard
 
-          echo "Finding files matching the pattern:"
-          mega-find /spt-release --pattern 'SPT-*.7z' > matching_files.txt
-          cat matching_files.txt
+          echo "Finding old, non-release type files..."
 
-          echo "Filter files matching specific build types:"
-          grep -E 'SPT-(NIGHTLY|DEBUG|BLEEDING|BLEEDINGMODS).*\.7z$' matching_files.txt > filtered_files.txt
-          cat filtered_files.txt
+          mega-find /spt-release \
+            --type=f \
+            --pattern=SPT-(NIGHTLY|DEBUG|BLEEDING|BLEEDINGMODS).*\.7z \
+            --use-pcre \
+            --mtime=+14d > old_files.txt
 
-          # Process each filepath
-          while read -r filepath; do
-            filename=$(basename "$filepath")
-            echo "Processing filename: $filename"
+          # Check if any old files were found
+          if [ -s old_files.txt ]; then
+            echo "Old files found:"
+            cat old_files.txt
 
-            # Extract date from filename
-            if [[ "$filename" =~ ([0-9]{8})\.7z$ ]]; then
-
-              file_date="${BASH_REMATCH[1]}"
-              echo "Extracted date: $file_date"
-
-              file_date_fmt=$(date -d "${file_date:0:4}-${file_date:4:2}-${file_date:6:2}" +%s)
-              echo "File date timestamp: $file_date_fmt"
-
-              # Get current date minus 14 days
-              current_date=$(date +%s)
-              limit_date=$(date -d "@$((current_date - 14 * 24 * 3600))" +%s)
-              echo "Current date timestamp: $current_date"
-              echo "Limit date timestamp: $limit_date"
-
-              # Compare dates and delete old files
-              if [[ "$file_date_fmt" -lt "$limit_date" ]]; then
-                echo "Deleting old file: $filepath"
-                mega-rm "$filepath"
-              else
-                echo "File is not older than 14 days, keeping: $filepath"
-              fi
-            else
-              echo "Filename does not match date pattern: $filename"
-            fi
-          done < filtered_files.txt
+            # Delete each file listed in old_files.txt
+            while read -r filepath; do
+              echo "Deleting old file: $filepath"
+              mega-rm "$filepath"
+            done < old_files.txt
+          else
+            echo "No old files found."
+          fi
 
           # Remove old file versions to save space.
           mega-deleteversions -f /spt-release/*