在 R 中构建和重新加载期间出错

Question

我正在对我在 R 中制作的包进行 roxygenizing。

脚本是

#' HandyTools
#'
#' Check if required packages are installed or not and installs them if not
#' @param packageList - a list containing the required package names
#'
#' @examples
#' checkPackagesLibrary(c("lme4","epitools","roxygen2"))
#'
#' @export
library(devtools)
checkPackagesLibrary <- function(packagesList){
  new.packages <- packagesList[!(packagesList %in% installed.packages(lib.loc="/data/legacy/user/R_Packages")[,"Package"])]
  if(length(new.packages))
    install.packages(new.packages, lib = "/data/legacy/user/R_Packages")
  else
    print("Required packages are already installed")
}

在 RStudio 中构建和重新加载时，错误是：

==> devtools::document(roclets=c('rd', 'collate', 'namespace', 'vignette'))

Updating HandyTools documentation
Loading HandyTools
Error: Missing name at code.R:14
In addition: Warning message:
In setup_ns_exports(pkg, export_all) :
  Objects listed as exports, but not present in namespace: c
Execution halted

Exited with status 1.

错误在第 14 行，即

library(devtools)

如果我评论这一行，错误就会消失。

Answer 1

新手错误：您不应该在包中的脚本中调用library()...。

改用DESCRIPTION 和NAMESPACE，最好通过Imports: 和importFrom() 语句。