Changelog

Backups now retain their original timestamp (created, last modified) where possible (even when zipped)
fixed broken behaviour when pruning with max_backups where max_backups is the maximum number of files
parse_size() now accepts (and rounds down) decimal file sizes, but throws a warning

Hotfix for some tests related to the Cache R6 class that fail on systems with low-precision file system timestamps (such as ext3 and old Windows file systems)

fixes time zone related issue in Cache$prune().
fixes bug in rotate_rds(on_change_only = TRUE) that occurs if a version of data.table < 1.3.0 is installed and either the source or target object are a data.table (but not both)
more robust clean up of temporary files in most unit tests

Improved some error messages
Added rotate_rds(), rotate_rds_time(), and rotate_rds_date() as a replacement for base::saveRDS() that supports creating backups instead of just overwriting the destination file.
added Cache, an R6 class for managing cache directories. The Cache API is still experimental and might change.
breaking R6 API: renamed some methods and active fields of BackupQueue to more universal names:
- $push_backup() -> $push()
- $backup_dir -> dir()
- $backups -> $files
- $file -> $origin
BackupQueue$prune_identical() removes identical backups for a BackupQueue

Changed default behavior of rotate_date(), rotate_time(), etc…: If no backups exist of target file, use the “created” timestamp to determine whether rotation should take place or not.
verbose == TRUE now also displays information on why rotation was NOT triggered.
added backup_info() which is similar to file.info() but with additional backup related infos.
removed "dir" column from $backups/backup_info()

Reordered the arguments of rotate_*() and backup_*() for more consistency
default size for all all rotate_*() and backup_*() functions is now 1 (Byte). This means empty files are never rotated by default.
added support for Inf size and age (= never rotate)
More robust regex for discovering backups of files
R6 API: BackupQueue subclasses gain a should_rotate(...) method that determines whether rotation/backup should take place.
R6 API: BackupQueueDate and BackupQueueDateTime now have a caching mechanism for backups (defaults to FALSE).
R6 API: BackupQueue* now use setters/getters for all fields.

added examples to rotate() documentation
dry_run status is now tracked internally instead of a potentially user modifiable option() (it was never designed to be user modifiable anyways).
Track test coverage with covr
Added a NEWS.md file to track changes to the package.

rotor 0.3.5 2020-12-13