Node LTS runner

Installs or updates the Node feature selected by DEBIAN_NODE_* variables. Modes are preflight, apply, and upgrade; the default is apply.

Preflight

wget -qO- https://devs-guide.github.io/debian/setup/cli/node.sh | \
  env DEBIAN_NODE_MODE=preflight bash

Shared Node LTS installation

This example installs the current Node LTS selection into the shared NVM location and exposes node/npm through system symlinks.

wget -qO- https://devs-guide.github.io/debian/setup/cli/node.sh | \
  env DEBIAN_NODE_MODE=apply \
      DEBIAN_NODE_VERSION='lts/*' \
      DEBIAN_NODE_INSTALL_SCOPE=shared \
      DEBIAN_NODE_NPM_POLICY=bundled \
      DEBIAN_NODE_CREATE_SYSTEM_SYMLINKS=1 \
      DEBIAN_NODE_ENABLE_COREPACK=1 \
      bash

Variable	Purpose
`DEBIAN_NODE_MODE`	Selects `preflight`, `apply`, or `upgrade`.
`DEBIAN_NODE_VERSION`	NVM version selector; `lts/*` follows the current LTS line. Pin a concrete version for repeatable hosts.
`DEBIAN_NODE_INSTALL_SCOPE`	`shared` installs under `/usr/local/lib/nvm`; `private` uses a per-user NVM directory.
`DEBIAN_NODE_NPM_POLICY`	Keeps the Node-bundled npm policy in this example.
`DEBIAN_NODE_CREATE_SYSTEM_SYMLINKS`	Makes the selected shared `node` and `npm` available on the normal system path.
`DEBIAN_NODE_ENABLE_COREPACK`	Enables Corepack for package-manager shims when the selected Node release supports it.

The runner stages ansible/cli/node.yml and its runtime support before invoking Ansible. Use upgrade with the same policy when intentionally moving an existing host forward.