Get info on the most recent main R process to orchestrate the targets of the current project.
Usage
tar_process(names = NULL, store = targets::tar_config_get("store"))
Arguments
- names
Optional, names of the data points to return. If supplied,
tar_process()
returns only the rows of the names you select. You can supply symbols ortidyselect
helpers likeall_of()
andstarts_with()
. IfNULL
, all names are selected.- store
Character of length 1, path to the
targets
data store. Defaults totar_config_get("store")
, which in turn defaults to_targets/
. When you set this argument, the value oftar_config_get("store")
is temporarily changed for the current function call. Seetar_config_get()
andtar_config_set()
for details about how to set the data store path persistently for a project.
Value
A data frame with metadata on the most recent main R process
to orchestrate the targets of the current project.
The output includes the pid
of the main process.
Details
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 the status with tar_pid() %in% ps::ps_pids()
before running another call to tar_make()
for the same project.
See also
Other data:
tar_load_everything()
,
tar_load_raw()
,
tar_load()
,
tar_meta()
,
tar_objects()
,
tar_pid()
,
tar_read_raw()
,
tar_read()
Examples
if (identical(Sys.getenv("TAR_EXAMPLES"), "true")) {
tar_dir({ # tar_dir() runs code from a temporary directory.
tar_script({
list(
tar_target(x, seq_len(2)),
tar_target(y, 2 * x, pattern = map(x))
)
}, ask = FALSE)
tar_make()
tar_process()
tar_process(pid)
})
}