Docker Development Environment

The Evidence Docker Development Environment (devenv) image is available on Docker Hub.

The devenv image can be used as a development environment for Evidence projects by running it as a container with a mounted directory. Utilizing this container allows developers to work on Evidence sites without the need to install any additional toolchains other than Docker. For instance, there is no necessity to install npm or node.

This repository contains the Dockerfiles, the publishing actions, and usage documentation pertaining to Evidence devenv images.

Using the Evidence Docker Development Environment

Pre-requisites

Ensure the Docker tool chain is installed via Docker Desktop (recommended) OR using binaries.

Starting the Docker Evidence Development Environment

Option 1: Create a new Evidence project from scratch using the Evidence project template:

        cd <path-to-your-evidence-project-root>
        docker run -v=$(pwd):/evidence-workspace -p=3000:3000 -it --rm evidencedev/devenv:latest --init

In this case, <path-to-your-evidence-project-root> should be an empty directory.
You should see the template site up when you point your browser to localhost:3000.
You should see new files, copied from the Evidence project template, in <path-to-your-evidence-project-root>.
Any subsequent edits made in <path-to-your-evidence-project-root> should be reflected on the browser.
If you are using Windows without PowerShell, you will need to replace $(pwd) with the full path to your Evidence project root directory or %cd%

Option 2: Work with an existing Evidence project

    cd <path-to-your-evidence-project-root>
    docker run -v=$(pwd):/evidence-workspace -p=3000:3000 -it --rm evidencedev/devenv:latest

In this case, <path-to-your-evidence-project-root> should contain an Evidence project.
You should see your site up when you point your browser to localhost:3000.
Any edits made in <path-to-your-evidence-project-root> should be reflected on the browser.
If you are using Windows without PowerShell, you will need to replace $(pwd) with the full path to your Evidence project root directory or %cd%

Note for M1/M2 Mac Users using DuckDB

If you are using an ARM M1/M2 Mac (Late 2021 Macs and later), you will need to use the --platform linux/amd64 flag to run the Evidence devenv container with either of the options above. For instance:

    cd <path-to-your-evidence-project-root>
    docker run -v=$(pwd):/evidence-workspace -p=3000:3000 -it --rm --platform linux/amd64 evidencedev/devenv:latest

Startup can be quite slow due to emulation. You may want to consider an alternative approach such as using Codespaces mentioned below.

Alternative Start Options

Using a Script to Start the Docker Development Evironment

If you'd rather not type out the docker commands, you have the option of starting the devenv with a script detailed here.

Running a Smaller Image

If you are not using DuckDB, and you have limited storage on your disk, you can use a smaller devenv image by replacing the evidencedev/devenv:latest image with evidencedev/devenv-lite:latest in the above commands.

Connecting to a Database from the Development Container

You can setup your DB connection as documented. However there are few caveats to note when using the Evidence development environment container.
- If your database is hosted on your host machine, you'll have to ensure that the Database host is set to host.docker.internal either via the settings or your database config file (instead of localhost, 0.0.0.0, etc). For instance:
```
{
    "host": "host.docker.internal",
    "database": "yourDBname",
    "port": 5432,
    "user": "yourUsername"
}
```
- If your database is hosted externally (e.g on the cloud), you'll have to ensure your docker container has permissions to access the outside world.

Stopping the Running devenv container

Option 1: docker ps to list all running containers, and copy the container ID of the running Evidence development environment container, and then run docker stop <container-id>.
Option 2: Use Ctrl+C to stop the running container on terminal.

Alternative to Using the Evidence Devenv

Github Codespaces are another way to setup an Evidence dev environment without installing npm, node etc. See Evidence installation docs for more information.

Development notes

This section only applies if you are contributing to this repo.

Testing the image locally

docker build -t <test-image-name> .
cd <path-to-your-evidence-project-root>
docker run -v=$(pwd):/evidence-workspace -p=3000:3000 -it --rm <test-image-name> <command-to-run>

Manually publishing the latest image to Docker Hub (Evidence team only)

Currently the image is hosted on Docker Hub and are re-built on pushes to main. To build and publish a new version manually, follow these steps

Login to Docker Hub => docker login
Build and push the image => docker buildx build --platform linux/amd64,linux/arm64 -t evidencedev/devenv:latest . --push

evidence-dev/docker-devenv