use_mit_license.R

#' Create MIT licence with KWB style
#'
#' @param copyright_holder list with name of copyright holder and additional
#' start_year (e.g. "2017") of copyright protection. If not specified
#' (start_year = NULL), the current year is used as year only!
#' (default: "list(name = kwb.pkgbuild:::kwb_string(), start_year = NULL)")
#' @return creates MIT licence file
#' @importFrom usethis use_mit_license
#' @importFrom stringr str_detect
#' @importFrom fs file_copy
#' @importFrom kwb.utils catAndRun
#' @export
use_mit_license <- function(
  copyright_holder = list(name = kwb_string(), start_year = NULL)
)
{
  kwb.utils::catAndRun("Creating KWB MIT LICENSE/LICENSE.md files",
                       expr = {
  usethis::use_mit_license(copyright_holder = copyright_holder$name)})


  copyright_years <- ifelse(!is.null(copyright_holder$start_year),
  sprintf("%s-%s", as.character(copyright_holder$start_year),
          format(Sys.Date(), format = "%Y")),
  format(Sys.Date(), format = "%Y"))

  if (! is.null(copyright_holder$start_year)) {

    kwb.utils::catAndRun("Modifying start year in MIT LICENSE (CRAN version)",
                         expr = {
                           writeLines(text = sprintf("YEAR: %s\nCOPYRIGHT HOLDER: %s",
                                                     copyright_years,
                                                     copyright_holder$name),
                                      con = "LICENSE")
                         })

    kwb.utils::catAndRun("Modifying start year in MIT LICENSE.md",
                         expr = {
    lic_txt <- readLines("LICENSE.md")
    index <- stringr::str_detect(lic_txt,pattern = "^Copyright\\s+\\(c\\)")

    lic_txt[index] <- sprintf(
      "Copyright (c) %s %s",
      copyright_years,
      copyright_holder$name
    )

    writeLines(lic_txt, "LICENSE.md")})


  }

}