Cancel a target while its command is running if a condition is met.

tar_cancel(condition = TRUE)

Arguments

condition

Logical of length 1, whether to cancel the target.

Details

Must be invoked by the target itself. tar_cancel() cannot interrupt a target from another process.

See also

Other utilities: tar_definition(), tar_envir(), tar_group(), tar_name(), tar_path(), tar_seed()

Examples

if (identical(Sys.getenv("TAR_EXAMPLES"), "true")) { tar_dir({ # tar_dir() runs code from a temporary directory. tar_script(tar_target(x, tar_cancel(1 > 0))) tar_make() # Should cancel target x. }) }