Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/21515#discussion_r217900617
--- Diff: dev/create-release/do-release-docker.sh ---
@@ -0,0 +1,143 @@
+#!/usr/bin/env bash
+
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+#
+
+#
+# Creates a Spark release candidate. The script will update versions, tag
the branch,
+# build Spark binary packages and documentation, and upload maven
artifacts to a staging
+# repository. There is also a dry run mode where only local builds are
performed, and
+# nothing is uploaded to the ASF repos.
+#
+# Run with "-h" for options.
+#
+
+set -e
+SELF=$(cd $(dirname $0) && pwd)
+. "$SELF/release-util.sh"
+
+function usage {
+ local NAME=$(basename $0)
+ cat <<EOF
+Usage: $NAME [options]
+
+This script runs the release scripts inside a docker image. The image is
hardcoded to be called
+"spark-rm" and will be re-generated (as needed) on every invocation of
this script.
+
+Options are:
+
+ -d [path] : required: working directory (output will be written to an
"output" directory in
+ the working directory).
+ -n : dry run mode. Performs checks and local builds, but do not
upload anything.
+ -t [tag] : tag for the spark-rm docker image to use for building
(default: "latest").
+ -j [path] : path to local JDK installation to use for building. By
default the script will
+ use openjdk8 installed in the docker image.
+ -s [step] : runs a single step of the process; valid steps are: tag,
build, docs, publish
+EOF
+}
+
+WORKDIR=
+IMGTAG=latest
+JAVA=
+RELEASE_STEP=
+while getopts "d:hj:ns:t:" opt; do
+ case $opt in
+ d) WORKDIR="$OPTARG" ;;
+ n) DRY_RUN=1 ;;
+ t) IMGTAG="$OPTARG" ;;
+ j) JAVA="$OPTARG" ;;
+ s) RELEASE_STEP="$OPTARG" ;;
+ h) usage ;;
+ ?) error "Invalid option. Run with -h for help." ;;
+ esac
+done
+
+if [ -z "$WORKDIR" ] || [ ! -d "$WORKDIR" ]; then
+ error "Work directory (-d) must be defined and exist. Run with -h for
help."
+fi
+
+if [ -d "$WORKDIR/output" ]; then
+ read -p "Output directory already exists. Overwrite and continue? [y/n]
" ANSWER
+ if [ "$ANSWER" != "y" ]; then
+ error "Exiting."
+ fi
+fi
+
+cd "$WORKDIR"
+rm -rf "$WORKDIR/output"
+mkdir "$WORKDIR/output"
+
+get_release_info
+
+# Place all RM scripts and necessary data in a local directory that must
be defined in the command
+# line. This directory is mounted into the image.
+for f in "$SELF"/*; do
+ if [ -f "$f" ]; then
+ cp "$f" "$WORKDIR"
+ fi
+done
+
+GPG_KEY_FILE="$WORKDIR/gpg.key"
--- End diff --
how shall we generate this `gpg.key`?
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