targets (version 0.4.1)

tar_process: Get main process info.

Description

Get info on the most recent main R process to orchestrate the targets of the current project.

Usage

tar_process(names = NULL)

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, a character vector, or tidyselect helpers like starts_with(). If NULL, all names are selected.

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_raw(), tar_load(), tar_meta(), tar_objects(), tar_pid(), tar_read_raw(), tar_read()

Examples

# NOT RUN {
if (identical(Sys.getenv("TAR_LONG_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)
})
}
# }