Pin Bazel versions

.travis.yml

@@ -1,66 +1,67 @@
-# trusty beta image has jdk8, gcc4.8.4
-dist: trusty
+dist: xenial
 sudo: required
-# xcode8 has jdk8
-osx_image: xcode8
-# Not technically required but suppresses 'Ruby' in Job status message.
 language: sh
+osx_image: xcode10.1
+
+addons:
+  apt:
+    packages:
+    - libxml2-utils
 
 cache:
     directories:
      - .bazel_cache
+     - ~/.bazel_binaries
 
 os:
   - linux
   - osx
   - windows
 
+###
+#
+# Want to update/change bazel versions?
+#
+# 1. Update the bazel_version case statement in
+#    ./tools/bazel to include hashes for the bazel version
+#    you're targeting.
+#
+# 2. either
+#    - If you're updating the default bazel version, change
+#      default_bazel_version in ./tools/bazel.
+#    or
+#    - If you want to add an additional bazel version to the build
+#      matrix, set BAZEL_VERSION=<desired-version> along side
+#      TEST_SCRIPT below.
+#
+# 3. If you need to update the Windows version, adjust
+#    the windows specific install code below.
+#
+###
+
 env:
   # Linting is broken. Disable until fixed.
   # See https://github.com/bazelbuild/rules_scala/pull/622
   # we want to test the last release
-  #- V=0.16.1 TEST_SCRIPT=test_lint.sh
-  - V=0.28.0 TEST_SCRIPT=test_rules_scala
-  #- V=0.14.1 TEST_SCRIPT=test_intellij_aspect.sh
-  - V=0.28.0 TEST_SCRIPT=test_reproducibility
+  #- TEST_SCRIPT=test_lint.sh
+  - TEST_SCRIPT=test_rules_scala
+  #- TEST_SCRIPT=test_intellij_aspect.sh
+  - TEST_SCRIPT=test_reproducibility
 
 
 before_install:
   - |
     if [[ "${TRAVIS_OS_NAME}" == "windows" ]]; then
       choco install jdk8 -params 'installdir=c:\\java8'
-      choco install bazel --version ${V}
-    else
-      if [[ "${TRAVIS_OS_NAME}" == "osx" ]]; then
-        OS=darwin
-      else
-        sudo sysctl kernel.unprivileged_userns_clone=1
-        sudo add-apt-repository -y ppa:openjdk-r/ppa
-        sudo apt-get update -q
-        sudo apt-get install openjdk-8-jdk -y
-        sudo apt-get install libxml2-utils -y
-        OS=linux
-      fi
-
-      if [[ $V =~ .*rc[0-9]+.* ]]; then
-        PRE_RC=$(expr "$V" : '\([0-9.]*\)rc.*')
-        RC_PRC=$(expr "$V" : '[0-9.]*\(rc.*\)')
-        URL="https://storage.googleapis.com/bazel/${PRE_RC}/${RC_PRC}/bazel-${V}-installer-${OS}-x86_64.sh"
-      else
-        URL="https://github.com/bazelbuild/bazel/releases/download/${V}/bazel-${V}-installer-${OS}-x86_64.sh"
-      fi
-      wget -O install.sh "${URL}"
-      chmod +x install.sh
-      ./install.sh --user
-      rm -f install.sh
+      choco install bazel --version 0.28.0
     fi
   - cat .bazelrc.travis >> .bazelrc
 
 script:
   - |
     if [[ "${TRAVIS_OS_NAME}" == "windows" ]]; then
       powershell -Command 'Set-ExecutionPolicy RemoteSigned -scope CurrentUser'
-      powershell -File ./${TEST_SCRIPT}.ps1
+      BAZEL_VERSION=host powershell -File ./${TEST_SCRIPT}.ps1
     else
       bash ./${TEST_SCRIPT}.sh ci
     fi

test_reproducibility.sh

@@ -2,6 +2,11 @@
 
 set -e
 
+if ! bazel_loc="$(type -p 'bazel')" || [[ -z "$bazel_loc" ]]; then
+  export PATH="$(cd "$(dirname "$0")"; pwd)"/tools:$PATH
+  echo 'Using ./tools/bazel directly for bazel calls'
+fi
+
 md5_util() {
     if [[ "$OSTYPE" == "darwin"* ]]; then
         _md5_util="md5"

test_rules_scala.sh

@@ -2,6 +2,11 @@
 
 set -e
 
+if ! bazel_loc="$(type -p 'bazel')" || [[ -z "$bazel_loc" ]]; then
+  export PATH="$(cd "$(dirname "$0")"; pwd)"/tools:$PATH
+  echo 'Using ./tools/bazel directly for bazel calls'
+fi
+
 test_disappearing_class() {
   git checkout test_expect_failure/disappearing_class/ClassProvider.scala
   bazel build test_expect_failure/disappearing_class:uses_class
@@ -1138,4 +1143,4 @@ $runner test_scalac_jvm_flags_from_scala_toolchain_fails
 $runner test_scalac_jvm_flags_work_with_scalapb
 $runner test_scala_test_jvm_flags_on_target_overrides_toolchain_passes
 $runner test_scala_test_jvm_flags_from_scala_toolchain_passes
-$runner test_scala_test_jvm_flags_from_scala_toolchain_fails
+$runner test_scala_test_jvm_flags_from_scala_toolchain_fails

test_runner.sh

@@ -12,7 +12,7 @@ run_test_ci() {
   local TEST_ARG=$@
   local log_file=output_$$.log
   echo "running test $TEST_ARG"
-  $TEST_ARG &>$log_file &
+  eval $TEST_ARG &>$log_file &
   local test_pid=$!
   SECONDS=0
   test_pulse_printer $! $TIMOUT $TEST_ARG &
@@ -83,4 +83,4 @@ get_test_runner() {
     exit 1
   fi
   echo "run_test_${test_env}"
-}
+}

tools/bazel

@@ -0,0 +1,85 @@
+#!/usr/bin/env bash
+set -e
+
+default_bazel_version='0.28.1'
+
+if [ "$BUILDKITE" = true ]; then
+    bazel_version='host'
+else
+    case $(uname -s) in
+    Darwin|Linux)
+	# shellcheck disable=SC2153
+	if [ -z "$BAZEL_VERSION" ]; then
+	    bazel_version="$default_bazel_version"
+	else
+	    bazel_version="$BAZEL_VERSION"
+	fi
+        ;;
+    *)
+	# windows, presumably
+	bazel_version='host'
+	;;
+    esac
+fi
+
+case "$bazel_version" in
+    'host')
+        bazel_version=$("$BAZEL_REAL" version | awk '/Build label/ {print $3}' | cut -d '-' -f 1)
+        bazel="$BAZEL_REAL"
+        ;;
+    '0.28.1')
+        darwin_sha='5d50ae13ba01a224ddf54cfd818289bee5b38e551cca22bffc79b89f377d2095'
+        linux_sha='a2a7e4cb38d7bc774a5bbfab4d45293f5f2158eb6caf0128792cc1148732a4e6'
+        ;;
+    *)
+        echo "The requested Bazel version '$bazel_version' is not supported"
+        exit 1
+        ;;
+esac
+
+if [ -z "$bazel" ]; then
+    bazel_bin_loc=~/.bazel_binaries
+    bazel=$bazel_bin_loc/$bazel_version/bin/bazel-real
+
+    if ! [ -f "$bazel" ]; then
+	case $(uname -s) in
+            Darwin)
+		platform='darwin'
+		sha=$darwin_sha
+		;;
+            Linux)
+		platform='linux'
+		sha=$linux_sha
+		;;
+            *)
+		echo 'Your OS is not supported for automatic bazel installs.'
+		exit 1
+		;;
+	esac
+	remote_source=https://github.com/bazelbuild/bazel/releases/download
+	installer_name="bazel-$bazel_version-installer-$platform-x86_64.sh"
+	url="$remote_source/$bazel_version/$installer_name"
+	(
+            tmp_dir=$(mktemp -d)
+	    # shellcheck disable=SC2064
+            trap "rm -rf $tmp_dir" EXIT
+            cd "$tmp_dir"
+            (>&2 echo "downloading installer from")
+            (>&2 echo "$url")
+            curl -o installer.sh -L "$url"
+            generated_sha=$(shasum -a 256 installer.sh | awk '{print $1}')
+            if [ "$generated_sha" != "$sha" ]; then
+		echo "Sha 256 does not match, expected: $sha"
+		echo "But found $generated_sha"
+		echo "Recommend you: update the sha to the expected"
+		echo "and then re-run this script"
+		exit 1
+            fi
+	    mkdir -p $bazel_bin_loc
+            chmod +x installer.sh
+            ./installer.sh --base="$bazel_bin_loc"/"$bazel_version" --bin="$bazel_bin_loc"/"$bazel_version"/bin_t
+	) >&2
+    fi
+fi
+
+exec "$bazel" "$@"