targets (version 0.4.1)

tar_cancel: Cancel a target mid-build under a custom condition.

Description

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

Usage

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_envir(), tar_group(), tar_name(), tar_path(), tar_seed(), tar_timestamp_raw(), tar_timestamp()

Examples

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