Nightly publish fix for non-existent nightly packages (#478)

Fix an error when no nightly packages previously exist.

Signed-off-by: Jonathan Swartz <jonathan@jswartz.info>

Author: swahtz

.github/workflows/nightly-publish.yml

@@ -253,16 +253,21 @@ jobs:
           set -euo pipefail
           CUTOFF=$(date -u -d '30 days ago' '+%Y-%m-%d')
           echo "Pruning nightly wheels uploaded before $CUTOFF"
+          LISTING=$(aws s3 ls "s3://${S3_BUCKET}/${SIMPLE_PREFIX}/${{ steps.proj.outputs.normalized }}/" 2>/dev/null || true)
+          if [ -z "$LISTING" ]; then
+            echo "No existing wheels found (first run or empty prefix) -- nothing to prune"
+            exit 0
+          fi
           DELETED=0
-          aws s3 ls "s3://${S3_BUCKET}/${SIMPLE_PREFIX}/${{ steps.proj.outputs.normalized }}/" 2>/dev/null | while read -r line; do
+          while read -r line; do
             DATE_PART=$(echo "$line" | awk '{print $1}')
             FILE_PART=$(echo "$line" | awk '{print $4}')
             if [[ "$FILE_PART" == *.whl ]] && [[ "$DATE_PART" < "$CUTOFF" ]]; then
               echo "Removing: $FILE_PART (uploaded $DATE_PART)"
               aws s3 rm "s3://${S3_BUCKET}/${SIMPLE_PREFIX}/${{ steps.proj.outputs.normalized }}/$FILE_PART" --only-show-errors
               DELETED=$((DELETED + 1))
             fi
-          done
+          done <<< "$LISTING"
           echo "Pruned $DELETED old nightly wheel(s)"
 
       - name: Upload wheels to S3 project directory

README.md

@@ -44,7 +44,8 @@ To install the latest nightly build:
 pip install --pre fvdb-core --extra-index-url https://fvdb-packages.s3.us-east-2.amazonaws.com/simple-nightly/
 ```
 
-Nightly builds use a synthetic version (`0.0.0.devYYYYMMDD`) and require `--pre`.
+Nightly builds use a synthetic version (e.g. `0.0.0.dev20260224+pt28.cu128`) and require `--pre`.
+The `+pt28.cu128` suffix identifies the PyTorch and CUDA versions the wheel was built against.
 Upgrading to a stable release later works naturally with `pip install --upgrade fvdb-core`.
 
 ## Building *f*VDB from Source