Getting started

Build

drumlin needs a Rust toolchain and has no other dependencies.

cargo build --release

The binary is target/release/drumlin.

Your first diagram

Create hello.uml:

diagram component "Hello"

component Client { requires IGreeting }
component Server { provides IGreeting }

Render it:

drumlin render hello.uml -o hello.svg

Both components name IGreeting, so drumlin wires the socket on the client to the lollipop on the server with a dashed dependency arrow. You did not have to draw it. Neither component uses a port; between two ports that have one interface each, drumlin draws a joined ball-and-socket instead. See Interface.

Commands

Grow the diagram

Add a package and an ordinary connector:

diagram component "Hello, again"

package "Backend" {
  component Server { provides IGreeting }
  component Store <<database>>
  Server --> Store : read
}

component Client { requires IGreeting }

Continue with File basics, pick a diagram kind under Diagrams (such as Sequence diagrams), or see all the examples.