Inline Shell script to build and deploy Azure Functions v2 Python preview apps

build-deploy-python-func.sh

#
# Build and deploy Python Azure Function v2 (preview) on Azure DevOps
#
# Paste this as an inline script into an "Azure CLI" Build Task running on an Ubuntu 16.04 managed host.
#
# Set Build Variables:
# 
#  FunctionFolder = name of folder containing your Function
#  FunctionAppName = name of the target Azure Function that will receive the deployment.


# Step 1: Install Python 3.6 & Functions Core tools 

# Functions source
wget -q https://packages.microsoft.com/config/ubuntu/16.04/packages-microsoft-prod.deb
sudo dpkg -i packages-microsoft-prod.deb

# Python 3.6 package for Ubuntu 16.04
sudo add-apt-repository ppa:deadsnakes/ppa

# Update packages list
sudo apt-get update

# Install Azure Functions Core Tools
sudo apt-get install azure-functions-core-tools

# install Python3 and Virtual Environment support
sudo apt-get install python3.6
sudo apt-get install python3.6-venv

# Step 2: Initialise Python Virtual Environment (venv) 
python3.6 -m venv .env
source .env/bin/activate

# Step 3: Initialise and build Function App

# Backup our source requirements.txt file
mv $(FunctionFolder)/requirements.txt  $(FunctionFolder)/requirements.orig.txt

# Initialise Function environment locally so it sets runtime to Python
# Note: this also overwrites requirements.txt
func init $(FunctionFolder) --worker-runtime python

# Delete the newly created requirements.txt file
rm $(FunctionFolder)/requirements.txt

# Restore our original requirements.txt file
mv $(FunctionFolder)/requirements.orig.txt $(FunctionFolder)/requirements.txt

# Install Functions extensions for Function
cd $(FunctionFolder)
func extensions install

# Step 4: Deploy (uses Docker) - FunctionAppName should be an existing Linux Consumption App Plan
func azure functionapp publish $(FunctionAppName) --build-native-deps