#' Function to update packages installed from github
#'
#' This function was copied from the link in the references.
#' I only changed the return type.
#' @seealso http://stackoverflow.com/questions/32538052/update-all-packages-from-github
#' @importFrom utils installed.packages
#' @importFrom utils packageDescription
#' @importFrom devtools install_github
#' @export
update_github_pkgs <- function() {
# check/load necessary packages
# devtools package
## if (!("package:devtools" %in% search())) {
## tryCatch(require(devtools), error = function(x) {warning(x); cat("Cannot load devtools package \n")})
## on.exit(detach("package:devtools", unload=TRUE))
## }
pkgs <- installed.packages(fields = "RemoteType")
github_pkgs <- pkgs[pkgs[, "RemoteType"] %in% "github", "Package"]
## print(github_pkgs)
res <- lapply(github_pkgs, function(pac) {
message("\nUpdating ", pac, " from GitHub...")
repo = packageDescription(pac, fields = "GithubRepo")
username = packageDescription(pac, fields = "GithubUsername")
install_github(repo = paste0(username, "/", repo))
})
}
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