Added files

PKGBUILD

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+# Maintainer: Claudio Maggioni <youremail@domain.com>
+pkgname=astley-rm
+pkgver=1
+pkgrel=1
+pkgdesc="Prevent 'rm -rf' playing Never Gonna Give You Up"
+arch=('any')
+url="https://praticamentetilde.github.io/linux/2016/07/28/how-to-rickroll-people-launching-rm-rf-on-your-system.html"
+license=('custom:unlicense')
+makedepends=('git' 'youtube-dl')
+
+_branch=master
+
+#source=("$pkgname-$_branch.zip::https://github.com/praticamentetilde/$pkgname/archive/$_branch.zip")
+source=("$pkgname-$_branch.zip")
+sha512sums=(SKIP)
+
+package() {
+  cd "$srcdir"
+  echo "Placing /usr/bin/astley-rm script..."
+  install -D -m755 astley-rm.sh "$pkgdir"/usr/bin/astley-rm
+  echo "Placing /usr/bin/astley-rm-config script..."
+  install -D -m755 astley-rm-config.sh "$pkgdir"/usr/bin/astley-rm-config
+  echo "Done."
+}

astley-rm-config.sh

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+#!/bin/bash
+
+usage="$(basename "$0") [-h] [-s] [-f FILE1 (FILE2 ...)] -- Set up the aliases for astley-rm.
+
+where:
+    -h  show this help text
+    -s  output the aliases
+    -f  specify manually the file(s) where to output the aliases.
+
+If the -f option is not used, the aliases will be added to /etc/profile and /etc/bash.bashrc.
+Once you have ran this script, restart your shell session in order to apply the aliases
+Please remember to manually delete these aliases before uninstall."
+
+config="\n# lines added by /usr/bin/astley-rm-config\nalias rm='/usr/bin/astley-rm'\nalias sudo='sudo '\n"
+
+while getopts ':hsf:' option; do
+  case "$option" in
+    h) echo "$usage"
+       exit
+       ;;
+    s) echo -e "$config"
+       exit
+       ;;
+    f) if [ -z $2 ]; then
+         echo "Please specify at least one file where to output the aliases."
+         exit 1
+       fi;
+       shift 1
+       for file in $@; do
+         echo -e $config >> $file
+       done
+       exit
+       ;;
+    :) printf "missing argument for -%s\n" "$OPTARG" >&2
+       echo "$usage" >&2
+       exit 1
+       ;;
+   \?) printf "illegal option: -%s\n" "$OPTARG" >&2
+       echo "$usage" >&2
+       exit 1
+       ;;
+  esac
+done
+echo -e $config >> /etc/profile
+echo -e $config >> /etc/bash.bashrc

astley-rm.install

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+post_install(){
+  echo "IMPORTANT! Run /usr/bin/astley-rm-config to set the aliases."
+}

astley-rm.sh

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+#! /bin/bash
+# Rickroll whoever tries to desert this system, even root.
+# To achieve this, set the appropriate aliases even in /etc/profile and similars.
+
+rickroll(){
+  echo "Never gonna desert this system..."
+  xdg-open "http://youtu.be/dQw4w9WgXcQ" 2>&1 &
+  exit
+}
+
+while getopts ":rf-" opt; do
+  # Prevent '--force' to be detected as -r and -f
+  if [ "$opt" = "-" ]; then
+    OPTIND=$OPTIND+1
+    continue
+  fi
+  if [ "$opt" = "r" ] || [ "$opt" = "f" ]; then
+    if [ "$tmp" = "" ]; then
+      tmp=$opt
+      continue
+    elif [ "$tmp" != "$opt" ]; then
+      rickroll
+    fi
+  fi
+done
+
+for var in "$@"
+do
+  if [[ "$var" = "--force" && "$tmp" = "r" ]]; then
+    rickroll
+  fi
+done
+
+# If it's safe, just run rm
+/bin/rm "$@"
+exit $?