Progression Handler: Progress Reported as the Size of a File on the File System
handler_filesize( file = "default.progress", intrusiveness = getOption("progressr.intrusiveness.file", 5), target = "file", ... )
(character) A filename.
(numeric) A non-negative scalar on how intrusive (disruptive) the reporter to the user.
(character vector) Specifies where progression updates are rendered.
Additional arguments passed to
This progression handler reports progress by updating the size of a file
on the file system. This provides a convenient way for an R script running
in batch mode to report on the progress such that the user can peek at the
file size (by default in 0-100 bytes) to assess the amount of the progress
ls -l -- *.progress.
*.progress file is accessible via for instance SSH, SFTP,
FTPS, HTTPS, etc., then progress can be assessed from a remote location.