Cancel a target while its command is running if a condition is met.
Details
Must be invoked by the target itself. tar_cancel()
cannot interrupt a target from another process.
See also
Other utilities:
tar_active()
,
tar_backoff()
,
tar_call()
,
tar_definition()
,
tar_described_as()
,
tar_envir()
,
tar_format_get()
,
tar_group()
,
tar_name()
,
tar_path()
,
tar_path_script()
,
tar_path_script_support()
,
tar_path_store()
,
tar_path_target()
,
tar_source()
,
tar_store()
Examples
if (identical(Sys.getenv("TAR_EXAMPLES"), "true")) { # for CRAN
tar_dir({ # tar_dir() runs code from a temp dir for CRAN.
tar_script(tar_target(x, tar_cancel(1 > 0)))
tar_make() # Should cancel target x.
})
}