tar_quarto_rep_run: Render a batch of parameterized Quarto reports inside a...

In tarchetypes: Archetypes for Targets

Render a batch of parameterized Quarto reports inside a tar_quarto_rep() target.

Description

Internal function needed for tar_quarto(). Users should not invoke it directly.

Usage

tar_quarto_rep_run(
  args,
  execute_params,
  extra_files,
  deps,
  default_output_file,
  rep_workers
)

Arguments

args	A named list of arguments to quarto::quarto_render().
execute_params	A data frame of Quarto parameters to branch over.
extra_files	Character vector of extra files that targets should track for changes. If the content of one of these files changes, then the report will rerun over all the parameters on the next tar_make(). These files are extra files, and they do not include the Quarto source document or rendered output document, which are already tracked for changes. Examples include bibliographies, style sheets, and supporting image files.
deps	An unnamed list of target dependencies of the Quarto report, automatically created by tar_quarto_rep().
default_output_file	Output file path determined by the YAML front-matter of the Quarto source document. Automatic output file names are based on this file.
rep_workers	Positive integer of length 1, number of local R processes to use to run reps within batches in parallel. If 1, then reps are run sequentially within each batch. If greater than 1, then reps within batch are run in parallel using a PSOCK cluster.

Value

Character vector with the path to the Quarto source file and the rendered output file. Both paths depend on the input source path, and they have no defaults.

Examples

if (identical(Sys.getenv("TAR_LONG_EXAMPLES"), "true")) {
targets::tar_dir({ # tar_dir() runs code from a temporary directory.
# Parameterized Quarto:
lines <- c(
  "---",
  "title: 'report.qmd source file'",
  "output_format: html_document",
  "params:",
  "  par: \"default value\"",
  "---",
  "Assume these lines are in a file called report.qmd.",
  "```{r}",
  "print(params$par)",
  "```"
)
writeLines(lines, "report.qmd") # In tar_dir(), not the user's file space.
args <- list(
  input = "report.qmd",
  execute = TRUE,
  execute_dir = quote(getwd()),
  execute_daemon = 0,
  execute_daemon_restart = FALSE,
  execute_debug = FALSE,
  cache = FALSE,
  cache_refresh = FALSE,
  debug = FALSE,
  quiet = TRUE,
  as_job = FALSE
)
execute_params <- tibble::tibble(
  par = c("non-default value 1", "non-default value 2"),
  output_file = c("report1.html", "report2.html")
)
tar_quarto_rep_run(
  args = args,
  execute_params = execute_params,
  extra_files = character(0),
  deps = NULL,
  default_output_file = "report_default.html"
)
})
}

tarchetypes documentation built on Oct. 4, 2023, 5:08 p.m.