10-auto-promote-APP_XX-STAGE_YY-to-STAGE_ZZ.sh

#!/bin/bash
# Copyright 2022 Google LLC
#
# 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.


# Created with codelabba.rb v.1.4a
source .env.sh || fatal "Config doesnt exist please create .env.sh"
#set -x
set -e

# Add your code here:
PIPELINE="${1:-app01}"
INITIAL_STAGE="${2:-dev}"    # seems useless, probably cos I just deploy a release which is independent on which stage it is. Good to learn :)
DESIRED_STAGE="${3:-staging}"

#gcloud config set deploy/region "$CLOUD_DEPLOY_REGION"

if [ $# -eq 0 ]; then
    yellow "Usage: $0 [appXX] [STAGE_FROM] [STAGE_TO] (STAGES can be: dev, staging, canary, production). Note: for APP03 remember the 3rd stage is 'canary-production'"
#else
fi

echo "You called: $0 appXX=$(red "$PIPELINE") STAGE_FROM=$(yellow $INITIAL_STAGE) STAGE_TO=$(green $DESIRED_STAGE)"
#exit 0

# COPIED FROM 09... IF FAST ENOUGH i COULD actually move to .env.sh
LATEST_SUCCESSFUL_RELEASE="$(get_latest_successful_release_by_pipeline "$PIPELINE" )"

if [ -z "$LATEST_SUCCESSFUL_RELEASE" ]; then
    _error "🥺 Sorry, no release found. Probably you need to build something to dev/canary first. Have you committed code to $PIPELINE yet? Have you followed Riccardo tutorial 🙃? Let me show you what I see:"
    set -x
    gcloud deploy releases list --delivery-pipeline="$PIPELINE" --region "$CLOUD_DEPLOY_REGION" --format 'table(renderState,name)'
    exit 153
fi

green "Now promoting DEV to STAG for PIPELINE=$PIPELINE (from ARGV1) and RELEASE=$LATEST_SUCCESSFUL_RELEASE.."

set -x

gcloud deploy releases promote --to-target "$DESIRED_STAGE" --region "$CLOUD_DEPLOY_REGION" \
    --release "$LATEST_SUCCESSFUL_RELEASE" --delivery-pipeline="$PIPELINE" --quiet


# End of your code here
_allgood_post_script
echo Everything is ok.