Add a build test to bazel-common to ensure that all of the libraries …

…build correctly

This doesn't ensure that all dependencies are satisfied correctly, but at least it ensures that the build files are properly formatted and sha256s are valid. We've already had a number of CLs that have failed one of these two invariants :-/

Also add a missing dep for the @autofactory processor. I guess these do some validation, inasmuch as the AutoFactoryProcessor required FormattingFiler from google-java-format in it's initialization step, which runs on java compilations.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=250682287

.travis.yml

@@ -0,0 +1,45 @@
+language: android
+
+os: linux
+dist: trusty
+sudo: required
+addons:
+  apt:
+    sources:
+      - ubuntu-toolchain-r-test
+    packages:
+      - libstdc++-4.9-dev # https://github.com/nodegit/nodegit/issues/853
+      - gcc-4.8
+      - g++-4.8
+
+android:
+  components:
+    - tools
+    - tools # Duplicated as per https://github.com/travis-ci/travis-ci/issues/6040#issuecomment-219367943
+    - build-tools-26.0.2
+    - android-26
+    - platform-tools
+    - extra-android-m2repository
+
+before_install:
+  - wget https://github.com/bazelbuild/bazel/releases/download/"${BAZEL_VERSION}"/bazel_"${BAZEL_VERSION}"-linux-x86_64.deb
+  - sudo dpkg -i bazel_"${BAZEL_VERSION}"-linux-x86_64.deb
+  - sudo rm -f /etc/mavenrc
+  - wget http://www.us.apache.org/dist/maven/maven-3/3.1.1/binaries/apache-maven-3.1.1-bin.tar.gz
+  - tar -zxf apache-maven-3.1.1-bin.tar.gz
+  - export PATH="$PWD/apache-maven-3.1.1/bin:$PATH"
+  - mkdir travis_bin
+  - ln -s $(which gcc-4.8) travis_bin/gcc
+  - ln -s $(which g++-4.8) travis_bin/g++
+  - export PATH="${PWD}/travis_bin:${PATH}"
+
+script: ./build_test.sh
+
+env:
+  global:
+    - BAZEL_VERSION="0.24.1"
+
+branches:
+  only:
+    - master
+    - /^release.*$/

build_test.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+#
+# Tests that all libraries in bazel-common can build correctly
+
+libraries=""
+for library in $(bazel query --output=label_kind //... | \
+      grep -v "//tools/maven:" | \
+      grep _library | \
+      awk '{print $3}'); do
+  if [[ -z "${libraries}" ]]; then
+    libraries="        \"${library}\","
+  else
+    printf -v libraries '%s\n        "%s",' "${libraries}" "${library}"
+  fi
+done
+
+readonly DIR=build_test
+
+mkdir "${DIR}"
+
+cat <<BUILD_TEST >> "${DIR}"/BUILD
+java_library(
+    name = "build_test",
+    srcs = ["BuildTest.java"],
+    deps = [
+${libraries}
+    ],
+    testonly = 1,
+)
+BUILD_TEST
+
+echo "class BuildTest {}" > "${DIR}"/BuildTest.java
+
+trap "rm -rf ${DIR}/" EXIT
+
+bazel build //build_test

third_party/java/auto/BUILD

@@ -81,6 +81,7 @@ java_plugin(
     deps = [
         ":common",
         ":service",
+        "//third_party/java/google_java_format",
         "//third_party/java/guava",
         "//third_party/java/javapoet",
         "@com_google_auto_factory_auto_factory//jar",