req_file: Extract requirements from a file

In hadley/requirements: Find Packages Required for Code to Run

Description

* '.R': extracts requirements from parsed code

* '.Rmd' & '.Rpres': requirements from chunks (parsed using regular expressions to avoid dependency on knitr package). If rmarkdown package is installed, will also add requirements from custom output type.

* '.Rnw': tangles the document and then extracts from '.R' file.

Usage

req_file(path)

Arguments

path	Path to file

Examples

path_r <- system.file("examples", "simple.R", package = "requirements")
path_rmd <- system.file("examples", "simple.Rmd", package = "requirements")

req_file(path_r)
req_file(path_rmd)

hadley/requirements documentation built on May 7, 2019, 8:43 a.m.