pin_versions.md
In pins: Pin, Discover and Share Resources

can use old pin_versions() api

Code
  x <- pin_versions("x")
  x <- pin_versions("x", "local")
  x <- pin_versions("x", board)

can't swap arguments or omit name with modern api

Code
  pin_versions(name, board)
Condition
  Error in `pin_versions()`:
  ! Please supply `board` then `name` when working with modern boards

Code
  pin_versions(board)
Condition
  Error in `pin_versions()`:
  ! Argument `name` is missing, with no default

informative error for writing with same version

Code
  board %>% pin_write(1:10, "x")
  board %>% pin_write(1:10, "x", force_identical_write = TRUE)
Condition
  Error in `pin_store()`:
  ! The new version "20120304T050607Z-xxxxx" is the same as the most recent version.
  i Did you try to create a new version with the same timestamp as the last version?

can prune old versions

Code
  pin_versions_prune(board, "x", n = 1)
Message
  Deleting versions: 20130104T050607Z-xxxxx, 20130204T050607Z-yyyyy, 20130304T050607Z-zzzzz
Code
  pin_versions_prune(board, "x", n = 1)
Message
  No old versions to delete

versions_keep() gives useful errors

Code
  versions_keep(NULL)
Condition
  Error in `versions_keep()`:
  ! Internal error: invalid result from pin_versions()
Code
  versions_keep(Sys.time())
Condition
  Error in `versions_keep()`:
  ! Must supply exactly one of `n` and `days`
Code
  versions_keep(Sys.time(), n = "a")
Condition
  Error in `versions_keep()`:
  ! `n` must be a single integer
Code
  versions_keep(Sys.time(), days = "a")
Condition
  Error in `versions_keep()`:
  ! `days` must be a single integer