Add update-bazel.sh rule to run gazelle and kazel

Signed-off-by: James Munnelly <james@munnelly.eu>

.kazelcfg.json

@@ -0,0 +1,4 @@
+{
+  "GoPrefix": "github.com/jetstack/cert-manager",
+  "AddSourcesRules": true
+}

hack/BUILD.bazel

@@ -26,6 +26,25 @@ sh_test(
     tags = ["lint"],
 )
 
+sh_binary(
+    name = "update-bazel",
+    srcs = ["update-bazel.sh"],
+    data = [
+        "//hack/bin:buildozer",
+        "//hack/bin:gazelle",
+        "//hack/bin:kazel",
+    ],
+)
+
+sh_test(
+    name = "verify-bazel",
+    srcs = ["verify-bazel.sh"],
+    data = [
+        ":update-bazel",
+        "//:all-srcs",
+    ],
+)
+
 filegroup(
     name = "package-srcs",
     srcs = glob(["**"]),

hack/bin/BUILD.bazel

@@ -39,6 +39,14 @@ genrule(
     visibility = ["//visibility:public"],
 )
 
+genrule(
+    name = "fetch_gazelle",
+    srcs = ["@bazel_gazelle//cmd/gazelle"],
+    outs = ["gazelle"],
+    cmd = "cp $(SRCS) $@",
+    visibility = ["//visibility:public"],
+)
+
 config_setting(
     name = "k8",
     values = {"host_cpu": "k8"},

hack/update-bazel.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# Copyright 2018 The Jetstack cert-manager contributors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+# This script should be run via `bazel run //hack:update-bazel`
+REPO_ROOT=${BUILD_WORKSPACE_DIRECTORY:-"$(cd "$(dirname "$0")" && pwd -P)"/..}
+runfiles="$(pwd)"
+export PATH="${runfiles}/hack/bin:${PATH}"
+cd "${REPO_ROOT}"
+
+# Generate BUILD.bazel files for golang types
+gazelle fix \
+    -external vendored \
+    -build_file_name BUILD.bazel \
+    -go_prefix github.com/jetstack/cert-manager
+
+# Update autogenerated package-srcs and all-srcs rules
+kazel
+
+# Add manual tags to all rules in vendor/ docs/generated/ and test/e2e/
+buildozer -types 'go_library,go_binary,go_test' 'add tags manual' '//vendor/...:*' || [[ $? -eq 3 ]]
+buildozer -types 'go_library,go_binary,go_test' 'add tags manual' '//docs/generated/...:*' || [[ $? -eq 3 ]]
+buildozer -types 'go_library,go_binary,go_test' 'add tags manual' '//test/e2e/...:*' || [[ $? -eq 3 ]]

hack/verify-bazel.sh

@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+
+# Copyright 2018 The Jetstack cert-manager contributors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+# TODO: this particular script should probably not run under 'bazel test'.
+# Because it *does*, and because bazel test relies upon BUILD.bazel files to
+# determine which runfiles to include, there can be cases where verify-bazel
+# passes, however upon a run of update-bazel, files could change because they
+# are not visible to verify-bazel during the 'bazel test' phase.
+
+RULE_NAME="bazel"
+
+SCRIPT_ROOT=$(dirname "${BASH_SOURCE}")/..
+
+_tmp="$(mktemp -d)"
+DIFFROOT="${SCRIPT_ROOT}/"
+TMP_DIFFROOT="${_tmp}/"
+
+cleanup() {
+  rm -rf "${_tmp}"
+}
+trap "cleanup" EXIT SIGINT
+
+cleanup
+
+mkdir -p "${TMP_DIFFROOT}"
+rsync -avvL "${DIFFROOT}"/ "${TMP_DIFFROOT}" >/dev/null
+# remove __main__ directory copied to tmp
+rm -Rf "${TMP_DIFFROOT}/__main__"
+
+cd "${TMP_DIFFROOT}"
+export BUILD_WORKSPACE_DIRECTORY="$(pwd)"
+"hack/update-${RULE_NAME}.sh"
+
+echo "diffing ${DIFFROOT} against freshly generated codegen"
+ret=0
+diff --exclude=__main__ -Naupr "${DIFFROOT}" "${TMP_DIFFROOT}" || ret=$?
+if [[ $ret -eq 0 ]]
+then
+  echo "${DIFFROOT} up to date."
+else
+  echo "${DIFFROOT} is out of date. Please run 'bazel run //hack:update-${RULE_NAME}'"
+  exit 1
+fi