Important

Serpentine is a work in progress and not suitable for production yet.

Serpentine

Serpentine is a workflow runner with a huge focus on simplicity and developer ergonomics. It uses its own custom DSL called snek which lets you define a graph of steps to execute.

Serpentine does not have the concept of jobs, pipelines, etc. it has the concept of the node, and which nodes depend on which, the end. This makes it trivially easy to share setup logic, parallelize workflows, etc.

base = Image("rust:latest") > Copy(".", "/app") > Workdir("/app");

test = base > Exec("cargo test");
clippy = base > Exec("cargo clippy");

export DEFAULT = base > !(test, clippy) Exec("Cargo build");

This represents the following graph:

---
config:
  theme: redux
  layout: elk
---
flowchart TD
    A["Image(rust:image)"] --> B["Copy(., /app)"]
    B --> C["Workdir(/app)"]
    C --> D["Exec(cargo test)"] & E["Exec(cargo clippy)"] & F["Exec(cargo build)"]
    D -.-> F
    E -.-> F
    F --> G["Output"]

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The serpentine runtime will intelligently spawn a max of 3 containers for this job, and run the test and clippy in parallel.