Get the timestamp(s) of a target.
Get the timestamp associated with a target's last successful run.
tar_timestamp(
name = NULL,
format = NULL,
tz = NULL,
parse = NULL,
store = targets::tar_config_get("store")
)name |
Symbol, name of the target. If |
format |
Deprecated in |
tz |
Deprecated in |
parse |
Deprecated in |
store |
Character of length 1, path to the
|
tar_timestamp() checks the metadata in _targets/meta/meta,
not the actual returned data of the target.
The timestamp depends on the storage format of the target.
If storage is local, e.g. formats like "rds" and "file",
then the time stamp is the latest modification time
of the target data files at the time the target
last successfully ran. For non-local formats like
"aws_rds" and "url", then targets chooses instead
to simply record the time the target last successfully ran.
If the target is not recorded in the metadata
or cannot be parsed correctly, then
tar_timestamp() returns a POSIXct object at 1970-01-01 UTC.
Other time:
tar_newer(),
tar_older(),
tar_timestamp_raw()
if (identical(Sys.getenv("TAR_EXAMPLES"), "true")) {
tar_dir({ # tar_dir() runs code from a temporary directory.
tar_script({
list(tar_target(x, 1))
}, ask = FALSE)
tar_make()
# Get the timestamp.
tar_timestamp(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()) < 3600),
cue = tar_cue(mode = "always")
)
)}, ask = FALSE)
tar_make()
})
}Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.