Add a prepare_release.sh script that automates some manual steps. (#524)

docs/developer_guide.md

@@ -7,7 +7,7 @@ found [here](../deploy/README.md).
 Local development uses [Skaffold](https://skaffold.dev) to manage the build, deploy and
 port forwarding.
 
-## Prerequisit
+## Prerequisite
 
 - Contact DataCommons team to get data access to Cloud Bigtable and BigQuery.
 
@@ -79,11 +79,17 @@ brought up here, can not test the REST API.
 
 ### Generate Go proto files
 
-Run the following code to generate Go proto files.
+Install the following packages as a one-time action.
 
 ```bash
+cd ~/   # Be sure there is no go.mod in the local directory
 go get google.golang.org/protobuf/cmd/protoc-gen-go@v1.23.0
 go get google.golang.org/grpc/cmd/protoc-gen-go-grpc@v0.0.0-20200824180931-410880dd7d91
+```
+
+Run the following command to generate Go proto files.
+
+```bash
 protoc \
   --proto_path=proto \
   --go_out=internal \

scripts/prepare_release.sh

@@ -0,0 +1,59 @@
+#!/bin/bash
+#
+# A helper script to update the storage versions and prepare a commit for
+# release.
+#
+
+DIR=$(dirname "$0")
+
+cd "$DIR"/..
+VERSION=
+
+function update_version() {
+  echo ""
+  echo "==== Updating BT and BQ versions ===="
+
+  BT=$(curl https://autopush.datacommons.org/version 2>/dev/null | awk '{ if ($1~/^borgcron_/) print $1; }')
+  printf "$BT" > deploy/storage/bigtable.version
+
+  BQ=$(curl https://autopush.datacommons.org/version 2>/dev/null | awk '{ if ($1~/^datcom-store/) print $1; }')
+  printf "$BQ" > deploy/storage/bigquery.version
+
+  VERSION="${BT//borgcron_/}"
+}
+
+function update_proto() {
+  echo ""
+  echo "==== Updating go proto files ===="
+  protoc --proto_path=proto --go_out=internal --go-grpc_out=internal \
+         --go-grpc_opt=requireUnimplementedServers=false proto/*.proto
+  if [ $? -ne 0 ]; then
+    echo "ERROR: Failed to update proto"
+    exit 1
+  fi
+}
+
+function update_golden() {
+  echo ""
+  echo "==== Updating staging golden files ===="
+  ./scripts/update_golden_staging.sh
+  if [ $? -ne 0 ]; then
+    echo "ERROR: Failed to update proto"
+    exit 1
+  fi
+}
+
+function commit() {
+  echo ""
+  echo "==== Committing the change ===="
+  git commit -a -m "Data Release: $VERSION"
+}
+
+update_version
+update_proto
+update_golden
+commit
+
+echo ""
+echo "NOTE: Please review the commit, push to your remote repo and create a PR."
+echo ""