mermaid

Install Mermaid CLI for diagram generation

Install Mermaid CLI (mmdc) to generate diagrams from .mmd files. Sets up a non-root user and Puppeteer configuration for headless rendering.

Example Usage

{
  "image": "mcr.microsoft.com/devcontainers/base:ubuntu",
  "features": {
    "ghcr.io/MiguelRodo/DevContainerFeatures/mermaid:1": {}
  }
}

With a custom user and Node.js version:

{
  "features": {
    "ghcr.io/MiguelRodo/DevContainerFeatures/mermaid:1": {
      "userName": "mermaiduser",
      "nodeVersion": "20"
    }
  }
}

Options

Option	Type	Default	Description
userName	string	"mermaiduser"	Username under which Mermaid CLI will run.
puppeteerConfigDir	string	"/usr/local/share/mermaid-config"	Directory to store Puppeteer configuration files.
nodeVersion	string	"lts"	Node.js version to install if not present (e.g., "lts", "20", "18").

Notes

• Requires Node.js — the feature will install it if not already present.
• Installs system libraries required by Puppeteer (Chromium dependencies).
• The non-root mermaiduser is used to run the headless browser safely inside the container.

Source

src/mermaid