yo-wasm VS vscode-dev-containers

WebAssembly (Wasm) is something that the Cloud Native Advocacy team has been exploring. It has been around for a few years and has mostly been used within browser-based applications. There are many blog posts on what makes WebAssembly an ideal target for running applications (e.g., smaller footprint with .wasm files compared to containers, code isolation, and sandboxing). My colleague Steven Murawski wrote a blog series on getting started with hosting Wasm apps on an emerging PaaS platform called Hippo which is developed by folks at Fermyon. In Part 1 of the series, he introduces topics and define some of the acronyms like "Wagi" and "WASI". He also introduced a runtime called Wasmtime which implements the WebAssembly System Interface (WASI) standard. This article will walk you through how Steven and I went about getting a .NET console app running as a Wasm app on the Wasmtime runtime in a Dev Container. The .NET console app produced in this article has also been contributed as a csharp template in the yo-wasm repo which is also maintained by Fermyon; so you can quickly test it out for yourself later.

After making the environment variables available, it’s time to create our helloworld project. We’ll use the yo-wasm generator.

// For format details, see https://aka.ms/devcontainer.json. For config options, see the README at: // https://github.com/microsoft/vscode-dev-containers/tree/v0.241.1/containers/ubuntu { "name": "Ubuntu", "build": { "dockerfile": "Dockerfile", "args": { "VARIANT": "ubuntu-22.04" } }, "postStartCommand": ".devcontainer/env.sh", "remoteUser": "vscode", "features": { "git": "os-provided", "aws-cli": "latest", "golang": "latest", "sshd": "latest" } }

# See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.245.0/containers/python-3/.devcontainer/base.Dockerfile # [Choice] Python version (use -bullseye variants on local arm64/Apple Silicon): 3, 3.10, 3.9, 3.8, 3.7, 3.6, 3-bullseye, 3.10-bullseye, 3.9-bullseye, 3.8-bullseye, 3.7-bullseye, 3.6-bullseye, 3-buster, 3.10-buster, 3.9-buster, 3.8-buster, 3.7-buster, 3.6-buster ARG VARIANT="3.10-bullseye" FROM mcr.microsoft.com/vscode/devcontainers/python:0-${VARIANT} # [Choice] Node.js version: none, lts/*, 16, 14, 12, 10 ARG NODE_VERSION="none" RUN if [ "${NODE_VERSION}" != "none" ]; then su vscode -c "umask 0002 && . /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"; fi # Install Google Chrome Stable and fonts # Note: this installs the necessary libs to make the browser work with Puppeteer. ENV PUPPETEER_SKIP_CHROMIUM_DOWNLOAD true RUN apt-get update && apt-get install gnupg wget -y && \ wget --quiet --output-document=- https://dl-ssl.google.com/linux/linux_signing_key.pub | gpg --dearmor > /etc/apt/trusted.gpg.d/google-archive.gpg && \ sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list' && \ apt-get update && \ apt-get install google-chrome-stable -y --no-install-recommends && \ rm -rf /var/lib/apt/lists/* # [Optional] If your pip requirements rarely change, uncomment this section to add them to the image. COPY requirements.txt /tmp/pip-tmp/ RUN pip3 --disable-pip-version-check --no-cache-dir install -r /tmp/pip-tmp/requirements.txt \ && rm -rf /tmp/pip-tmp

Looks like they do? https://github.com/microsoft/vscode-dev-containers/issues/675

In the vscode-dev-containers repo, you'll see that there too is a .devcontainer directory. This contains instructions for building the dotnet vscode-dev-container. Click into the directory.

I'm trying to set up a dev environment which utilises the standard Python 3 devcontainer for Python files (which is great IMO), but also utilises the R devcontainer for R files. Or at the very least sets up the basic R for VSCode environment espoused on the VSCode tutorials.

Select a predefined container definition. In my case I will select 'Ubuntu'. NOTE: There is a growing variety of predefined images that can be selected from, maintained on GitHubs vscode-dev-containers repository:

As documented here, a Dev Container's built-in features are sources from the script-library folder in the vscode-dev-containers repo. The Remote - Containers extension and GitHub Codespaces include "preview" functionality to extend Dev Container features. You can add any custom feature by using the dev-container-features-template sample repository.

In your case in the development container you can specify a specific version of .NET SDK and Azure Functions SDK. There is a premade devcontainer for VSCode with Azure Functions and C#: https://github.com/microsoft/vscode-dev-containers/tree/main/containers/azure-functions-dotnet-6-isolated