fix(ci): authenticate B2 list-bucket request in existing-version check #7
2026-06-29
fix(ci): authenticate B2 list-bucket request in existing-version check
Backblaze B2 requires authentication for the list-bucket API; anonymous access only works for individual public-read objects. The unauthenticated curl returned AccessDenied, so r-version-s3.txt was always empty and every R version was rebuilt despite already existing in s3. Sign the listing request with --aws-sigv4 using the same B2 credentials as the upload step. Also fix the broken version extraction: the old substr($NF, 3, 5) ran against the prefixed key and yielded garbage, so the Build step's grep could never match. Print the actual version on a match and use a literal index() instead of a regex comparison.