Enable local cache by default (bazelbuild#478)

* Enable local cache by default

* Spin up separate reproducibility Travis job

Author: andyscott

.gitignore

@@ -3,4 +3,5 @@ bazel-*
 *.idea
 hash1
 hash2
-.DS_store
+.DS_store
+.bazel_cache

.travis.yml

@@ -6,6 +6,10 @@ osx_image: xcode8
 # Not technically required but suppresses 'Ruby' in Job status message.
 language: java
 
+cache:
+    directories:
+     - .bazel_cache
+
 os:
   - linux
   - osx
@@ -14,6 +18,7 @@ env:
   # we want to test the last release
   - V=0.11.1 TEST_SCRIPT=test_rules_scala.sh
   - V=0.11.1 TEST_SCRIPT=test_intellij_aspect.sh
+  - V=0.11.1 TEST_SCRIPT=test_reproducibility.sh
 
 before_install:
   - |
@@ -40,4 +45,3 @@ before_install:
 
 script:
   - bash $TEST_SCRIPT ci
-

test_reproducibility.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+
+set -e
+
+md5_util() {
+    if [[ "$OSTYPE" == "darwin"* ]]; then
+        _md5_util="md5"
+    else
+        _md5_util="md5sum"
+    fi
+    echo "$_md5_util"
+}
+
+non_deploy_jar_md5_sum() {
+    find bazel-bin/test -name "*.jar" ! -name "*_deploy.jar" | xargs -n 1 -P 5 $(md5_util) | sort
+}
+
+test_build_is_identical() {
+    bazel build test/...
+    non_deploy_jar_md5_sum > hash1
+    bazel clean
+    sleep 2 # to make sure that if timestamps slip in we get different ones
+    bazel build --noexperimental_local_disk_cache test/...
+    non_deploy_jar_md5_sum > hash2
+    diff hash1 hash2
+}
+
+dir=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
+# shellcheck source=./test_runner.sh
+. "${dir}"/test_runner.sh
+runner=$(get_test_runner "${1:-local}")
+
+
+# This test is last/separate since it compares the current outputs to new ones to make sure they're identical
+# If it runs before some of the above (like jmh) the "current" output in CI might be too close in time to the "new" one
+# The test also adds sleep by itself but it's best if it's last
+$runner test_build_is_identical

test_rules_scala.sh

@@ -16,28 +16,6 @@ test_disappearing_class() {
   fi
   set -e
 }
-md5_util() {
-if [[ "$OSTYPE" == "darwin"* ]]; then
-   _md5_util="md5"
-else
-   _md5_util="md5sum"
-fi
-echo "$_md5_util"
-}
-
-non_deploy_jar_md5_sum() {
-  find bazel-bin/test -name "*.jar" ! -name "*_deploy.jar" | xargs -n 1 -P 5 $(md5_util) | sort
-}
-
-test_build_is_identical() {
-  bazel build test/...
-  non_deploy_jar_md5_sum > hash1
-  bazel clean
-  sleep 2 # to make sure that if timestamps slip in we get different ones
-  bazel build test/...
-  non_deploy_jar_md5_sum > hash2
-  diff hash1 hash2
-}
 
 test_transitive_deps() {
   set +e
@@ -813,8 +791,3 @@ $runner test_scala_import_library_passes_labels_of_direct_deps
 $runner java_toolchain_javacopts_are_used
 $runner bazel run test/src/main/scala/scala/test/classpath_resources:classpath_resource
 $runner test_scala_classpath_resources_expect_warning_on_namespace_conflict
-
-# This test is last since it compares the current outputs to new ones to make sure they're identical
-# If it runs before some of the above (like jmh) the "current" output in CI might be too close in time to the "new" one
-# The test also adds sleep by itself but it's best if it's last
-$runner test_build_is_identical

tools/bazel.rc

@@ -0,0 +1,2 @@
+build --experimental_local_disk_cache
+build --experimental_local_disk_cache_path=.bazel_cache