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Delete one or more metadata records (e.g. to rerun a target).

Source: R/tar_invalidate.R
tar_invalidate.Rd

Delete the metadata of records in _targets/meta/meta but keep the return values of targets in _targets/objects/.

Usage

tar_invalidate(names, store = targets::tar_config_get("store"))

Arguments

names

Names of the targets to remove from the metadata list. You can supply symbols or tidyselect helpers like any_of() and starts_with().

store

Character of length 1, path to the targets data store. Defaults to tar_config_get("store"), which in turn defaults to _targets/. When you set this argument, the value of tar_config_get("store") is temporarily changed for the current function call. See tar_config_get() and tar_config_set() for details about how to set the data store path persistently for a project.

Value

NULL (invisibly).

Details

This function forces one or more targets to rerun on the next tar_make(), regardless of the cues and regardless of how those targets are stored. After tar_invalidate(), you will still be able to locate the data files with tar_path_target() and manually salvage them in an emergency. However, tar_load() and tar_read() will not be able to read the data into R, and subsequent calls to tar_make() will attempt to rerun those targets. For patterns recorded in the metadata, all the branches will be invalidated. For patterns no longer in the metadata, branches are left alone.

See also

Other clean: tar_delete(), tar_destroy(), tar_prune()

Examples

if (identical(Sys.getenv("TAR_EXAMPLES"), "true")) {
tar_dir({ # tar_dir() runs code from a temporary directory.
tar_script({
  list(
    tar_target(y1, 1 + 1),
    tar_target(y2, 1 + 1),
    tar_target(z, y1 + y2)
  )
}, ask = FALSE)
tar_make()
tar_invalidate(starts_with("y")) # Only invalidates y1 and y2.
tar_make() # y1 and y2 rerun but return same values, so z is up to date.
})
}