Toolchains

Pin a language runtime and yatr downloads it once and puts it on the task PATH — a fresh checkout runs green with no manual installs.

[toolchain.node]
version = "20.11.0"
url = "https://nodejs.org/dist/v{version}/node-v{version}-{os}-{arch}.tar.gz"
bin = "node-v{version}-{os}-{arch}/bin"

[tasks.build]
run = ["node build.js"]   # uses the pinned node, wherever yatr runs

{version}, {os} (linux/darwin/win) and {arch} (x64/arm64) are substituted into the url and bin templates — matching the common Node-style release-asset naming.

Toolchains are cached under a local toolchains directory (override with YATR_TOOLCHAIN_DIR) and installed once, then reused. .tar.gz/.tgz archives are supported today.

This kills “works on my machine” across languages: the runtime your build needs is declared in yatr.toml and fetched on demand, the same on every developer machine and in CI.