check-for-deprecation.sh

#! /bin/bash

J=4
OUT_FILE=deprecated.txt

if [ "$1" = "--help" ] || [ "$1" = "-h" ] || [ "$1" = "help" ]; then
  cat <<EOF
$ check-for-deprecation.sh
Check all github apps in the readme for deprecation.
Running $J processes in parallel.

Found deprecated repos are written to: $OUT_FILE
EOF
  exit
fi

check_if_archived_on_github() {
  APPS=$(grep -e "- \[.\+\]\(.\+\)\s" readme.md | grep 'github.com' | awk -F "(" '{ print $2 }' | cut -d ")" -f1)

  check_deprecation() {
    REPO="$1"
    if nice curl -SsL "$REPO" | grep "This repository has been archived by the owner on" >/dev/null; then
      echo "DEPRECATED $REPO" | tee -a $OUT_FILE
    else
      echo "CHECKED $REPO"
    fi
  }

  # parallel exec: https://unix.stackexchange.com/a/216475
  for app in $(echo $APPS); do
    ((i=i%J)); ((i++==0)) && wait
    check_deprecation "$app" &
  done
}

check_if_link_is_dead() {
  command -v deadlink >/dev/null || { echo "deadlink is not installed" 1>&2; exit 127; }

  tmp=$(mktemp)
  grep -Po "http[^)]+" readme.md | grep -v "https://github.com" >$tmp
  deadlink check $tmp
}

check_if_archived_on_github
check_if_link_is_dead