R/workplan.R
Use this function to help write the commands in your workflow plan data frame. See the examples for a full explanation.
file_in(...)
... | Character strings. File paths of input files to a command in your workflow plan data frame. |
---|
A character vector of declared input file paths.
file_out()
, knitr_in()
, ignore()
# NOT RUN { test_with_dir("Contain side effects", { # The `file_out()` and `file_in()` functions # just takes in strings and returns them. file_out("summaries.txt") # Their main purpose is to orchestrate your custom files # in your workflow plan data frame. suppressWarnings( plan <- drake_plan( write.csv(mtcars, file_out("mtcars.csv")), contents = read.csv(file_in("mtcars.csv")), strings_in_dots = "literals" # deprecated but useful: no single quotes needed. # nolint ) ) plan # Drake knows "\"mtcars.csv\"" is the first target # and a dependency of `contents`. See for yourself: config <- make(plan) file.exists("mtcars.csv") vis_drake_graph(config) # See also `knitr_in()`. `knitr_in()` is like `file_in()` # except that it analyzes active code chunks in your `knitr` # source file and detects non-file dependencies. # That way, updates to the right dependencies trigger rebuilds # in your report. }) # }