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Extract package names used with :: in an R script

Source: R/general_used_packages.R
used_packages.Rd

Reads an R script file and extracts unique package names used with the :: operator (e.g., dplyr from dplyr::arrange). Ignores entire lines that are comments (starting with #, ignoring whitespace) and text after # within lines.

Usage

used_packages(file_path)

Arguments

file_path

Character string specifying the path to the R script file.

Value

A character vector of unique package names used with ::. Returns character(0) if none are found.

Examples

# Example with a script from GitHub
dplyr_select_url <- paste0(
  "https://raw.githubusercontent.com/elgabbas/ecokit/",
  "refs/heads/main/R/spat_split_raster.R")
example_script <- fs::file_temp("Example_script_", ext = "R")
download.file(dplyr_select_url, destfile = example_script, quiet = TRUE)

used_packages(example_script)
#> [1] "ecokit"   "fs"       "graphics" "raster"  

# cleanup
fs::file_delete(example_script)