simple shell script to test system patches at the console

ptest.sh

#!/bin/sh

c='https://github.com/pfsense/pfsense/commit'
retval=0

if [ "$1" = "-r" ]; then
  verb='reverted'
  shift
else
  verb='applied'
fi

if [ -z "$1" ]; then
  echo "specify a hash from github commits: ${c}s"
  exit
fi

mkdir /tmp/patches 2>/dev/null
rm /tmp/patches/*.patch 2>/dev/null
if ! fetch --quiet --output=/tmp/patches/ "$c/$1.patch"; then
  echo "error fetching commit $1"
  exit 1
fi

s=$(/usr/bin/sed -En 's/^Subject: \[PATCH\] (.*)$/\1/p' </tmp/patches/$1.patch)

if [ "$verb" = "reverted" ]; then
  if ! /usr/bin/patch --directory=/ -f -p2 -i /tmp/patches/$1.patch --quiet --check --reverse --ignore-whitespace; then
    retval=1
  fi
else
  if ! /usr/bin/patch --directory=/ -t -p2 -i /tmp/patches/$1.patch --quiet --check --forward --ignore-whitespace; then
    retval=1
  fi
fi

echo
echo "  commit: $c/$1"
echo " subject: $s"
if [ "$retval" -ne 0 ]; then
  echo "  result: patch can NOT be cleanly $verb"
else
  echo "  result: patch CAN be cleanly $verb"
fi
echo