Get the process ID (PID) of the most recent main R process to orchestrate the targets of the current project.
tar_pid(store = targets::tar_config_get("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.
Integer with the process ID (PID) of the most recent main R process to orchestrate the targets of the current project.
The main process is the R process invoked
by tar_make() or similar. If callr_function is not NULL,
this is an external process, and the pid in the return value
will not agree with Sys.getpid() in your current interactive session.
The process may or may not be alive. You may want to
check it with ps::ps_is_running(ps::ps_handle(targets::tar_pid()))
before running another call to tar_make()
for the same project.
Other data:
tar_crew(),
tar_process()
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, seq_len(2)),
tar_target(y, 2 * x, pattern = map(x))
)
}, ask = FALSE)
tar_make()
Sys.getpid()
tar_pid() # Different from the current PID.
})
}