Update proto clients in rust-sdk (#43)

* Create a script to update proto files for release and ran it. Version bump.

* Version bumped to 0.5.0-alpha.0

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "dapr"
-version = "0.4.0-alpha.0"
+version = "0.5.0-alpha.0"
 authors = ["dapr.io"]
 edition = "2018"
 license-file = "LICENSE"

update-protos.sh

@@ -0,0 +1,71 @@
+#!/bin/bash
+
+# ------------------------------------------------------------
+# Copyright (c) Microsoft Corporation and Dapr Contributors.
+# Licensed under the MIT License.
+# ------------------------------------------------------------
+
+# Protobuf generation
+APPCALLBACK="appcallback"
+COMMON="common"
+DAPR="dapr"
+RUNTIME="runtime"
+
+# Path to store output
+PROTO_PATH="dapr/proto"
+
+# Http request CLI
+HTTP_REQUEST_CLI=curl
+
+checkHttpRequestCLI() {
+    if type "curl" > /dev/null; then
+        HTTP_REQUEST_CLI=curl
+    elif type "wget" > /dev/null; then
+        HTTP_REQUEST_CLI=wget
+    else
+        echo "Either curl or wget is required"
+        exit 1
+    fi
+}
+
+downloadFile() {
+    FOLDER_NAME=$1
+    FILE_NAME=$2
+    FILE_PATH="${PROTO_PATH}/${FOLDER_NAME}/v1"
+
+    # URL for proto file
+    PROTO_URL="https://raw.githubusercontent.com/dapr/dapr/master/dapr/proto/${FOLDER_NAME}/v1/${FILE_NAME}.proto"
+
+    mkdir -p "${FILE_PATH}"
+
+    echo "Downloading $PROTO_URL ..."
+    if [ "$HTTP_REQUEST_CLI" == "curl" ]; then
+        (cd ${FILE_PATH} && curl -SsL "$PROTO_URL" -o "${FILE_NAME}.proto")
+    else
+        wget -q -P "$PROTO_URL" "${FILE_PATH}/${FILE_NAME}.proto"
+    fi
+
+    if [ ! -e "${FILE_PATH}/${FILE_NAME}.proto" ]; then
+        echo "failed to download $PROTO_URL ..."
+        ret_val=$FILE_NAME
+        exit 1
+    fi
+}
+
+fail_trap() {
+    result=$?
+    if [ $result != 0 ]; then
+        echo "Failed to download proto files: $ret_val"
+    fi
+    exit $result
+}
+
+# -----------------------------------------------------------------------------
+# main
+# -----------------------------------------------------------------------------
+trap "fail_trap" EXIT
+
+checkHttpRequestCLI
+downloadFile $COMMON $COMMON
+downloadFile $RUNTIME $DAPR
+downloadFile $RUNTIME $APPCALLBACK