pre-commit-hook.sh

#!/bin/bash

MSG="use 'git commit --no-verify' to override this check"
files=$(ls -d vignettes/* | grep -Ei '\.orig$')

for fl in $files; do
    # Remove .orig from the vignette files
    rmd=$(echo $fl | sed 's/.orig//')
    # Remove .Rmd to get the raw file name
    vignettefile=$(echo $rmd | sed 's/.Rmd//')

    # Check if the raw file name has changed in git (regardless of whether
    # it's the .orig of .Rmd)
    vignettes=($(git diff --name-only | grep -Ei $vignettefile))

    if
        [[ "$fl" -nt  "$rmd" ]]; then
        echo -e "$rmd is out of date; Please re-knit $fl\n$MSG"
        exit 1
    elif
        [[ ${#vignettes[*]} -lt 2 && ${#vignettes[*]} -gt 0 ]]; then
        echo -e "$fl and $rmd should be both staged\n$MSG"
        exit 1
    fi
done