[Truffle] FindBugs for Truffle.

Author: chrisseaton

.gitignore

@@ -99,3 +99,8 @@ core/.gitignore
 core/.project
 core/.settings
 core/.apt_generated
+
+# Truffle findbugs
+truffle-findbugs-report.html
+findbugs-noUpdateChecks-3.0.0.tar.gz
+findbugs-3.0.0

.travis.yml

@@ -62,12 +62,15 @@ matrix:
       jdk: oraclejdk8
     - env: COMMAND=test/check_versions.sh
       jdk: oraclejdk8
+    - env: COMMAND=tool/truffle-findbugs.sh
+      jdk: oraclejdk8
   fast_finish: true
   allow_failures:
     - env: PHASE='-Pcomplete'
     - env: PHASE='-Prake -Dtask=spec:jrubyc'
     - env: PHASE='-Prake -Dtask=spec:profiler'
     - env: PHASE='-Ptruffle-specs-rubysl'
+    - env: COMMAND=tool/truffle-findbugs.sh
 
 branches:
   only:

tool/truffle-findbugs-exclude.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FindBugsFilter>
+  <Match>
+    <Class name="~.*NodeFactory.*" />
+  </Match>
+</FindBugsFilter>

tool/truffle-findbugs.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+
+# Runs findbugs for the Truffle classes only. By default writes to stdout. Use
+# with --report to get a HTML report.
+
+if [[ $* == *--report* ]]
+then
+  ui_options="-html -output truffle-findbugs-report.html"
+else
+  ui_options=""
+fi
+
+mvn package || exit $?
+
+version=3.0.0
+shasum=30bdcee2c909a0eef61a4f60f4489cd2f5a4d21c
+tarball=findbugs-noUpdateChecks-$version.tar.gz
+
+if [ ! -e findbugs-$version ]
+then
+  wget http://prdownloads.sourceforge.net/findbugs/$tarball || exit $?
+  echo "$shasum  $tarball" | shasum -c || exit $?
+  tar -xf $tarball || exit $?
+fi
+
+findbugs-3.0.0/bin/findbugs \
+  -textui $ui_options \
+  -exclude tool/truffle-findbugs-exclude.xml \
+  -exitcode \
+  -low \
+  core/target/classes/org/jruby/truffle/ || exit $?