Merge changes Ie5fbd18d,I4b96d0cd into stable-2.16

* changes:
  lib: check that nongoogle.bzl doesn't grow new dependencies
  tools/nongoogle.bzl: separate out dependencies exempt from library compliance

WORKSPACE

@@ -5,6 +5,7 @@ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive", "http_file"
 load("//tools/bzl:maven_jar.bzl", "GERRIT", "MAVEN_LOCAL", "maven_jar")
 load("//lib/codemirror:cm.bzl", "CM_VERSION", "DIFF_MATCH_PATCH_VERSION")
 load("//plugins:external_plugin_deps.bzl", "external_plugin_deps")
+load("//tools:nongoogle.bzl", "declare_nongoogle_deps")
 
 http_archive(
     name = "bazel_skylib",
@@ -633,12 +634,7 @@ maven_jar(
     sha1 = "ed193d86e0af90cc2342aedbe73c5d86b03fa09b",
 )
 
-# Transitive dependency of commons-compress
-maven_jar(
-    name = "tukaani-xz",
-    artifact = "org.tukaani:xz:1.6",
-    sha1 = "05b6f921f1810bdf90e25471968f741f87168b64",
-)
+declare_nongoogle_deps()
 
 LUCENE_VERS = "6.6.5"
 

lib/BUILD

@@ -504,3 +504,9 @@ java_library(
     visibility = ["//visibility:public"],
     exports = ["@postgresql//jar"],
 )
+
+sh_test(
+    name = "nongoogle_test",
+    srcs = ["nongoogle_test.sh"],
+    data = ["//tools:nongoogle.bzl"],
+)

lib/nongoogle_test.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# This test ensures that new dependencies in nongoogle.bzl go through LC review.
+
+set -eux
+
+bzl=$(pwd)/tools/nongoogle.bzl
+
+TMP=$(mktemp -d || mktemp -d -t /tmp/tmp.XXXXXX)
+
+grep 'name = "[^"]*"' ${bzl} | sed 's|^[^"]*"||g;s|".*$||g' | sort > $TMP/names
+
+cat << EOF > $TMP/want
+tukaani-xz
+EOF
+
+diff -u $TMP/names $TMP/want

tools/BUILD

@@ -4,6 +4,8 @@ load(
     "default_java_toolchain",
 )
 
+exports_files(["nongoogle.bzl"])
+
 py_binary(
     name = "merge_jars",
     srcs = ["merge_jars.py"],

tools/nongoogle.bzl

@@ -0,0 +1,16 @@
+load("//tools/bzl:maven_jar.bzl", "maven_jar")
+
+def declare_nongoogle_deps():
+    """loads dependencies that are not used at Google.
+
+    Changes to versions are exempt from library compliance review. New
+    dependencies must pass through library compliance review. This is
+    enforced by //lib:nongoogle_test.
+    """
+
+    # Transitive dependency of commons-compress
+    maven_jar(
+        name = "tukaani-xz",
+        artifact = "org.tukaani:xz:1.6",
+        sha1 = "05b6f921f1810bdf90e25471968f741f87168b64",
+    )