Make targets out of dependencies using a recipe

make_with_recipe(
  recipe,
  targets,
  dependencies = NULL,
  packages = NULL,
  envir = new.env(parent = parent.frame()),
  quiet = getOption("makepipe.quiet"),
  force = FALSE,
  label = NULL,
  note = NULL,
  ...
)

Arguments

recipe: A chunk of R code which makes the targets
targets: A character vector of paths to files
dependencies: A character vector of paths to files which the targets depend on
packages: A character vector of names of packages which targets depend on
envir: The environment in which to execute the source or recipe. By default, execution will take place in a fresh environment whose parent is the calling environment.
quiet: A logical determining whether or not messages are signaled
force: A logical determining whether or not execution of the source or recipe will be forced (i.e. happen whether or not the targets are out-of-date)
label: A short label for the source or recipe, displayed in pipeline visualisations. If NULL, the basename(source) or 'Recipe' will be used.
note: A description of what the recipe does, displayed in pipeline visualisations. If NULL, the recipe code is used.
...: Additional parameters to pass to base::eval()

Value

A Segment object containing execution metadata.

Examples

if (FALSE) {
# Merge files in fresh environment if raw data has been updated since last
# merged
make_with_recipe(
  recipe = {
    dat <- readRDS("data/raw_data.Rds")
    pop <- readRDS("data/pop_data.Rds")
    merged_dat <- merge(dat, pop, by = "id")
    saveRDS(merged_dat, "data/merged_data.Rds")
  },
  targets = "data/merged_data.Rds",
  dependencies = c("data/raw_data.Rds", "data/raw_pop.Rds")
)

# Merge files in current environment if raw data has been updated since last
# merged. (If recipe executed, all objects bound in source will be available
# in current env).
make_with_recipe(
  recipe = {
    dat <- readRDS("data/raw_data.Rds")
    pop <- readRDS("data/pop_data.Rds")
    merged_dat <- merge(dat, pop, by = "id")
    saveRDS(merged_dat, "data/merged_data.Rds")
  },
  targets = "data/merged_data.Rds",
  dependencies = c("data/raw_data.Rds", "data/raw_pop.Rds"),
  envir = environment()
)

# Merge files in global environment if raw data has been updated since last
# merged. (If source executed, all objects bound in source will be available
# in global env).
make_with_recipe(
  recipe = {
    dat <- readRDS("data/raw_data.Rds")
    pop <- readRDS("data/pop_data.Rds")
    merged_dat <- merge(dat, pop, by = "id")
    saveRDS(merged_dat, "data/merged_data.Rds")
  },
  targets = "data/merged_data.Rds",
  dependencies = c("data/raw_data.Rds", "data/raw_pop.Rds"),
  envir = globalenv()
)
}

Make targets out of dependencies using a recipe

Arguments

Value

See also

Examples