R/attach.R

In tidylab: Shared Infrastructure of 'Tidylab' Package Collection

core_unloaded <- function() {
    search <- paste0("package:", core)
    core[!search %in% search()]
}

tidylab_attach <- function() {
    to_load <- core_unloaded()
    if (length(to_load) == 0) {
          return(invisible())
      }

    msg(
        cli::rule(
            left = crayon::bold("Attaching packages"),
            right = paste0("tidylab ", package_version("tidylab"))
        ),
        startup = TRUE
    )

    versions <- vapply(to_load, package_version, character(1))
    packages <- paste0(
        crayon::green(cli::symbol$tick), " ", crayon::blue(format(to_load)), " ",
        crayon::col_align(versions, max(crayon::col_nchar(versions)))
    )

    if (length(packages) %% 2 == 1) {
        packages <- append(packages, "")
    }
    col1 <- seq_len(length(packages) / 2)
    info <- paste0(packages[col1], "     ", packages[-col1])

    msg(paste(info, collapse = "\n"), startup = TRUE)

    if (interactive()) {
        suppressPackageStartupMessages(
            lapply(to_load, library, character.only = TRUE, warn.conflicts = FALSE)
        )
    }

    invisible()
}

package_version <- function(x) {
    version <- as.character(unclass(utils::packageVersion(x))[[1]])

    if (length(version) > 3) {
        version[4:length(version)] <- crayon::red(as.character(version[4:length(version)]))
    }
    paste0(version, collapse = ".")
}