Environment Setup

1. Install Azure CLI
2. Install Azure Function Core Tools
3. Install tfswitch to be able to install and use any Terraform version at anytime

Project Structure

.
├── LICENSE
├── README.md
├── infra <- Code that will setup the infrastructure on Azure
│   ├── main.tf
│   ├── resources.tf
│   └── variables.tf
└── src
    └── example-ts-function <- Code of a Typescript Azure Function
        ├── host.json
        ├── local.settings.json 
        ├── package.json
        ├── say-goodbye <- Setting a trigger and input/output bindings for a specific usage of the function 
        │   └── function.json
        ├── say-hello <- Another trigger and bindings
        │   └── function.json
        └── tsconfig.json

Steps to Run this Function as Is

Login to Azure with CLI Login

Login to Azure with Azure CLI command az login

Setup Azure Infrastructure with Terraform

1. Run terraform validate && terraform fmt to validate your infra configuration and format the files
2. terraform init to prepare the working directory so Terraform can run the configuration
3. terraform plan to preview any changes before you apply them
4. terraform apply to create or update infrastructure

Package (zip) the Function and Send it to Azure

Inside the function root folder, run:

1. npm run build && zip -r <name-of-your-choice>.zip .
2. az functionapp deployment source config-zip -g <resource-group-name> -n <function-app-name> --src ./<package-name>.zip --debug

You can lately save these commands as NPM commands.

To Setup new Azure Function from Scratch

1. Inside the src folder, execute the command func init <MyFunctionName>
2. Select the worker runtime, in this case Node
3. Select the language, so Typescript
4. Once the function directory is created, navigate to it with cd <DirName> and create a new directory with a standard name, like mkdir http-trigger
5. Navigate to your new dir and create a function definition file with touch function.json