Command composition

Compose functions to build richer workflows without duplicating logic.

Calling other functions

Call sibling functions directly; they are injected into the execution scope.

build() cargo build --release
test() cargo test
lint() cargo clippy

ci() {
    echo "Running CI..."
    lint || exit 1
    test || exit 1
    build
}

Key behaviors:

• Exit codes propagate; guard dependent steps with || exit 1 when needed.
• Top-level Runfile variables are visible to all functions.

Cross-language patterns

• Use shell functions to orchestrate calls into language-specific helpers.
• Combine platform guards with composition to select the right implementation per OS.
• Keep shared setup (env vars, temp dirs) in one function and reuse it across tasks.

For interpreter mixing patterns, see Polyglot commands.