Add a script to build protoc zip packages.

[ci skip]

Change-Id: Ia0e0bf3bb6bd24633dc8f294318bb20ac837f8b9

protoc-artifacts/README.md

@@ -102,6 +102,25 @@ When you have done deployment for all platforms, go to
 https://oss.sonatype.org/#stagingRepositories, verify that the staging
 repository has all the binaries, close and release this repository.
 
+## Upload zip packages to github release page.
+After uploading protoc artifacts to Maven Central repository, run the
+build-zip.sh script to bulid zip packages for these protoc binaries
+and upload these zip packages to the download section of the github
+release. For example:
+```
+$ ./build-zip.sh 3.0.0-beta-4
+```
+The above command will create 5 zip files:
+```
+dist/protoc-3.0.0-beta-4-win32.zip
+dist/protoc-3.0.0-beta-4-osx-x86_32.zip
+dist/protoc-3.0.0-beta-4-osx-x86_64.zip
+dist/protoc-3.0.0-beta-4-linux-x86_32.zip
+dist/protoc-3.0.0-beta-4-linux-x86_64.zip
+```
+Before running the script, make sure the artifacts are accessible from:
+http://repo1.maven.org/maven2/com/google/protobuf/protoc/
+
 ### Tips for deploying on Linux
 We build on Centos 6.6 to provide a good compatibility for not very new
 systems. We have provided a ``Dockerfile`` under this directory to build the

protoc-artifacts/build-zip.sh

+#!/bin/bash
+
+if [ $# -eq 0 ]; then
+  cat <<EOF
+Usage: $0 <VERSION_NUMBER>
+
+Example:
+  $ $0 3.0.0-beta-4
+
+This script will download pre-built protoc binaries from maven repository
+and package them with well-known type .proto files to create .zip packages
+suitable to be included in the github release page. Each invocation will
+create 5 zip packages:
+  dist/protoc-<VERSION_NUMBER>-win32.zip
+  dist/protoc-<VERSION_NUMBER>-osx-x86_32.zip
+  dist/protoc-<VERSION_NUMBER>-osx-x86_64.zip
+  dist/protoc-<VERSION_NUMBER>-linux-x86_32.zip
+  dist/protoc-<VERSION_NUMBER>-linux-x86_64.zip
+EOF
+  exit 1
+fi
+
+VERSION_NUMBER=$1
+
+# <zip file name> <binary file name> pairs.
+declare -a FILE_NAMES=( \
+  win32.zip windows-x86_32.exe \
+  osx-x86_32.zip osx-x86_32.exe \
+  osx-x86_64.zip osx-x86_64.exe \
+  linux-x86_32.zip linux-x86_32.exe \
+  linux-x86_64.zip linux-x86_64.exe \
+)
+
+# List of all well-known types to be included.
+declare -a WELL_KNOWN_TYPES=(           \
+  google/protobuf/descriptor.proto      \
+  google/protobuf/any.proto             \
+  google/protobuf/api.proto             \
+  google/protobuf/duration.proto        \
+  google/protobuf/empty.proto           \
+  google/protobuf/field_mask.proto      \
+  google/protobuf/source_context.proto  \
+  google/protobuf/struct.proto          \
+  google/protobuf/timestamp.proto       \
+  google/protobuf/type.proto            \
+  google/protobuf/wrappers.proto        \
+  google/protobuf/compiler/plugin.proto \
+)
+
+set -e
+
+# A temporary working directory to put all files.
+DIR=$(mktemp -d)
+
+# Copy over well-known types.
+mkdir -p ${DIR}/include/google/protobuf/compiler
+for PROTO in ${WELL_KNOWN_TYPES[@]}; do
+  cp -f ../src/${PROTO} ${DIR}/include/${PROTO}
+done
+
+# Create a readme file.
+cat <<EOF > ${DIR}/readme.txt
+Protocol Buffers - Google's data interchange format
+Copyright 2008 Google Inc.
+https://developers.google.com/protocol-buffers/
+
+This package contains a precompiled binary version of the protocol buffer
+compiler (protoc). This binary is intended for users who want to use Protocol
+Buffers in languages other than C++ but do not want to compile protoc
+themselves. To install, simply place this binary somewhere in your PATH.
+
+Please refer to our official github site for more installation instructions:
+  https://github.com/google/protobuf
+EOF
+
+mkdir -p dist
+mkdir -p ${DIR}/bin
+# Create a zip file for each binary.
+for((i=0;i<${#FILE_NAMES[@]};i+=2));do
+  ZIP_NAME=${FILE_NAMES[$i]}
+  BINARY_NAME=${FILE_NAMES[$(($i+1))]}
+  BINARY_URL=http://repo1.maven.org/maven2/com/google/protobuf/protoc/${VERSION_NUMBER}/protoc-${VERSION_NUMBER}-${BINARY_NAME}
+  if ! wget ${BINARY_URL} -O ${DIR}/bin/protoc &> /dev/null; then
+    echo "[ERROR] Failed to download ${BINARY_URL}" >&2
+    echo "[ERROR] Skipped protoc-${VERSION_NAME}-${ZIP_NAME}" >&2
+    continue
+  fi
+  TARGET_ZIP_FILE=`pwd`/dist/protoc-${VERSION_NUMBER}-${ZIP_NAME}
+  pushd $DIR &> /dev/null
+  chmod +x bin/protoc
+  zip -r ${TARGET_ZIP_FILE} include bin readme.txt &> /dev/null
+  popd &> /dev/null
+  echo "[INFO] Successfully created ${TARGET_ZIP_FILE}"
+done