targets (version 0.0.0.9000)

tar_load: Load the values of targets.

Description

Load the return values of targets into the current environment (or the environment of your choosing). For a typical target, the return value lives in a file in _targets/objects/. For dynamic files (i.e. format = "file") the paths loaded in place of the values.

Usage

tar_load(names, branches = NULL, meta = tar_meta(), envir = parent.frame())

Arguments

names

Names of the targets to build or check. Set to NULL to check/build all the targets (default). Otherwise, you can supply symbols, a character vector, or tidyselect helpers like starts_with().

branches

Integer of indices of the branches to load for any targets that are patterns.

meta

Data frame of metadata from tar_meta(). tar_read() with the default arguments can be inefficient for large pipelines because all the metadata is stored in a single file. However, if you call tar_meta() beforehand and supply it to the meta argument, then successive calls to tar_read() may run much faster.

envir

Environment to put the loaded targets.

Value

Nothing.

Examples

# NOT RUN {
tar_dir({
tar_script(
  tar_pipeline(
    tar_target(y1, 1 + 1),
    tar_target(y2, 1 + 1),
    tar_target(z, y1 + y2)
  )
)
tar_make()
tar_load(starts_with("y"))
})
# }