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#!/usr/bin/env nix-shell
#!nix-shell -i bash -p jq parallel
# Example how to work with the `lib.maintainers` attrset.
# Can be used to check whether all user handles are still valid.
set -e
# nixpkgs='<nixpkgs>'
# if [ -n "$1" ]; then
function checkCommits {
local user="$1"
local tmp=$(mktemp)
curl --silent -w "%{http_code}" \
"$user" \
> "$tmp"
# the last line of tmp contains the http status
local status=$(tail -n1 "$tmp")
local ret=
case $status in
200) if <"$tmp" grep -i "no commits found" > /dev/null; then
# because of github’s hard request limits, this can take some time
429) sleep 2
printf "."
checkCommits "$user"
*) printf "BAD STATUS: $(tail -n1 $tmp) for %s\n" "$user"; ret=1
rm "$tmp"
return $ret
export -f checkCommits
function checkUser {
local user="$1"
local status=
status="$(curl --silent --head "${user}" | grep Status)"
# checks whether a user handle can be found on github
if [[ "$status" =~ 404 ]]; then
printf "%s\t\t\t\t%s\n" "$status" "$user"
# checks whether the user handle has any nixpkgs commits
elif checkCommits "$user"; then
printf "OK!\t\t\t\t%s\n" "$user"
printf "No Commits!\t\t\t%s\n" "$user"
export -f checkUser
# output the maintainers set as json
# and filter out the github username of each maintainer (if it exists)
# then check some at the same time
nix-instantiate -A lib.maintainers --eval --strict --json \
| jq -r '.[]|.github|select(.)' \
| parallel -j5 checkUser
# parallel -j100 checkUser ::: "eelco" "profpatsch" "Profpatsch" "a"