Add backup_dir argument to backup_tweets()

R/tweet_io.R

 #' @export
 backup_tweets <- function(
   file = getOption("gathertweet.file", "tweets.rds"),
+  backup_dir = "backups",
   lck = NULL
 ) {
   if (!file_exists(file)) return()
     on.exit(unlock(lck))
   }
   stopifnot_locked(lck, message = "Unable to acquire lock on {file}")
-  file_backup <- path_add(file)
+  file_backup <- path(fs::path_dir(file), backup_dir, fs::path_file(file))
+  file_backup <- path_add(file_backup)
+  fs::dir_create(fs::path_dir(file_backup))
   log_info("Backing up tweet file to {file_backup}")
   fs::file_copy(file, file_backup)
 }

inst/gathertweet.R

 
 Usage:
   gathertweet search [--file=<file>] [options] [--] <terms>...
-  gathertweet update [--file=<file> --backup --polite --token --debug-args]
+  gathertweet update [--file=<file> --token=<token> --backup --polite --debug-args]
 
 Arguments
   <terms>  Search terms. Individual search terms are queried separately,
   --quiet               Disable printing of {rtweet} processing/retrieval messages
   --polite              Only allow one process (search|update) to run at a time
   --backup              Create a backup of existing tweet file before writing any new files
+  --backup-dir <backup_dir>  Location for backups, use "" for current directory. [default: backups]
   --debug-args          Print values of the arguments only
 ' -> doc
 
   tweets <- tweets[!duplicated(tweets$status_id), ]
 
   log_info("Gathered {nrow(tweets)} tweets")
-  if (args$backup) backup_tweets(args$file)
+  if (args$backup) backup_tweets(args$file, backup_dir = args$backup_dir)
   tweets <- save_tweets(tweets, args$file)
 
   log_info("Total of {nrow(tweets)} tweets in {args$file}")
     token = args$token
   )
   log_debug("Status lookup returned {nrow(tweets)} tweets")
-  if (args$backup) backup_tweets(args$file)
+  if (args$backup) backup_tweets(args$file, backup_dir = args$backup_dir)
   tweets <- save_tweets(tweets, args$file)
   log_debug("Total of {nrow(tweets)} tweets in {args$file}")
   log_info("Tweet update complete")