Get a target's traceback

Return the saved traceback of a target. Assumes the target errored out in a previous run of the pipeline with workspaces enabled for that target. See tar_workspace() for details.

tar_traceback(
  name,
  envir = NULL,
  packages = NULL,
  source = NULL,
  characters = NULL,
  store = targets::tar_config_get("store")
)

Arguments

name

Symbol, name of the target whose workspace to read.

envir

Deprecated in targets > 0.3.1 (2021-03-28).

packages

Logical, whether to load the required packages of the target.

source

Logical, whether to run the target script file (default: _targets.R) to load user-defined global object dependencies into envir. If TRUE, then envir should either be the global environment or inherit from the global environment.

characters

Deprecated in targets 1.4.0 (2023-12-06).

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

Character vector, the traceback of a failed target if it exists.

See also

Other debug: tar_load_globals(), tar_workspace(), tar_workspace_download(), tar_workspaces()

Examples

if (identical(Sys.getenv("TAR_EXAMPLES"), "true")) { # for CRAN
tar_dir({ # tar_dir() runs code from a temp dir for CRAN.
tmp <- sample(1)
tar_script({
  library(targets)
  library(tarchetypes)
  tar_option_set(workspace_on_error = TRUE)
  list(
    tar_target(x, "loaded"),
    tar_target(y, stop(x))
  )
}, ask = FALSE)
try(tar_make())
tar_traceback(y, characters = 60)
})
}