spotbugs

#!/usr/bin/env bash
# shellcheck disable=SC2155
usage() {
  echo "Usage: $0 dir"
  echo "dir - Project directory"
  exit 1
}
require() {
  hash "$@" || exit 127
}
path() {
  dirname "$(which "$1")"
}
WARNING="WARNING: Using existing classpath file which may be outdated. Create setupclasspath that generates compile.cp and run.cp files that contain all class jars required by project"
ERROR="ERROR: Error executing $setupCpFile. Fix the script and run once more."

setupcp() {
  if test -e "$setupCpFile"; then
    if ./"$setupCpFile"; then
      auxCp=$(cat "$auxCpFile")
      return 0
    elif test -e "$auxCpFile"; then
      echo "$WARNING"
      auxCp=$(cat "$auxCpFile")
      return 0
    else
      echo "$ERROR"
      return 1
    fi
  fi
  return 0
}

require java cat which dirname realpath
dir="$(path "$0")"
declare -i res=0
declare -r errFile="spotbugs.errors"
declare -r classpathFile="${dir}/spotbugs.cp"
declare -r cp=$(cat "$classpathFile")
declare -r setupCpFile="setupclasspath"
declare -r auxCpFile="compile.cp"
auxCp=""
declare -r suppressionsFile="suppressions-sb.xml"
declare -r mainClass="edu.umd.cs.findbugs.LaunchAppropriateUI"
declare -r pluginjars="${dir}/spotbugs-plugin.cp"
plugincp=$(cat "$pluginjars")

if [ "$#" -ne 1 ] || ! [ -d "$1" ]; then
  usage
fi

proj="$1"
echo "$proj"
echo "WARNING:"
echo "Kindly ensure that latest compiled classes are available."
echo "Else you might encounter stale or inconsistent results."
if test "$res" -eq 0; then
  (
    cd "$proj" || exit $?
    if setupcp; then
      java -cp "$cp":"$plugincp" "$mainClass" \
        -pluginList "$plugincp" \
        -showPlugins
      java -cp "$cp":"$plugincp" "$mainClass" \
        -output "$errFile" \
        -exclude "$(realpath "$suppressionsFile")" \
        -auxclasspath "$auxCp":. -adjustExperimental \
        -workHard -quiet \
        -experimental -nested:true -timestampNow \
        -longBugCodes -progress \
        -pluginList "$plugincp" \
        -sourcepath . . ||
        {
          exitCode="$?"
          echo "$0 exited with error code $exitCode"
          cd ..
          exit "$exitCode"
        }
    fi
    exit $?
  )
else
  exit $res
fi