The script that checks whether the installed packages load

Only the packages the scripts load are installed at their recorded versions, next to the current versions of everything else. An old version can then keep another package from loading (a current ggplot2 next to a recorded scales stopped with "namespace 'scales' 1.2.1 is being loaded, but >= 1.4.0 is required"), or crash R when a current package uses it (a recorded magrittr crashed library(tidyverse) on R 4.6.1). Both were found in real repositories.

Usage

.repro_load_check_lines(lib, pkgs, recorded, results_file)

Arguments

lib

the library the packages were installed in

pkgs

the packages the scripts load

recorded

the packages installed at a recorded version

results_file

where the script saves its results, after every package: a list of set_aside (package, because, version_installed, note) and not_loading (package, message)

Value

the lines of the script

Details

The script loads each package in a new R process, so a crash stops only that process, and a namespace that an earlier package loaded does not hide a fault. When a package does not load, a recorded version is set aside, so the current version is used: the one the error names, or else the first recorded package it depends on (or the package itself) without which it loads. A package that does not load without them either is reported, and nothing is set aside for it. The script runs without this package, in a container or in a new process, and works from R 3.6.