tar_timestamp_raw: Get the timestamp(s) of a target (raw version).

In targets: Dynamic Function-Oriented 'Make'-Like Declarative Pipelines

Get the timestamp(s) of a target (raw version).

Description

Get the time that a target last ran successfully.

Usage

tar_timestamp_raw(
  name = NULL,
  format = NULL,
  tz = NULL,
  parse = NULL,
  store = targets::tar_config_get("store")
)

Arguments

name	Character of length 1, name of the target.
format	Deprecated in targets version 0.6.0 (2021-07-21).
tz	Deprecated in targets version 0.6.0 (2021-07-21).
parse	Deprecated in targets version 0.6.0 (2021-07-21).
store	Character of length 1, path to the targets data store. Defaults to tar_config_get("store"), which in turn defaults to ⁠_targets/⁠. When you set this argument, the value of tar_config_get("store") is temporarily changed for the current function call. See tar_config_get() and tar_config_set() for details about how to set the data store path persistently for a project.

Details

tar_timestamp_raw() is like tar_timestamp() except it accepts a character string for name instead of a symbol. tar_timestamp_raw() checks the metadata in ⁠_targets/meta/meta⁠, not the actual data. Time stamps are recorded only for targets that run commands: just non-branching targets and individual dynamic branches.

Value

If the target is not recorded in the metadata or cannot be parsed correctly, then tar_timestamp_raw() returns a POSIXct object at ⁠1970-01-01 UTC⁠.

See Also

Other time: tar_newer(), tar_older(), tar_timestamp()

Examples

if (identical(Sys.getenv("TAR_EXAMPLES"), "true")) { # for CRAN
tar_dir({ # tar_dir() runs code from a temp dir for CRAN.
tar_script({
  list(tar_target(x, 1))
}, ask = FALSE)
tar_make()
# Get the timestamp.
tar_timestamp_raw("x")
# We can use the timestamp to cancel the target
# if it already ran within the last hour.
# Be sure to set `cue = tar_cue(mode = "always")`
# if you want the target to always check the timestamp.
tar_script({
  list(
  tar_target(
    x,
    tar_cancel((Sys.time() - tar_timestamp_raw()) < 3600),
    cue = tar_cue(mode = "always")
  )
)}, ask = FALSE)
tar_make()
})
}

targets documentation built on Oct. 12, 2023, 5:07 p.m.