feat(node): install fnm with Node LTS and enable pnpm

README.md

@@ -20,6 +20,7 @@ bash init.sh
 | `just julia`                         | Install Julia via juliaup                                                         |
 | `just haskell`                       | Install Haskell via ghcup                                                         |
 | `just python`                        | Install uv (Python package manager)                                               |
+| `just node`                          | Install fnm (Node version manager) with Node LTS and enable pnpm via corepack     |
 | `just go` / `just go update`         | Install or update Go                                                              |
 | `just neovim` / `just neovim update` | Install or update Neovim (pass `home` to install under `~/.local`)                |
 | `just emacs` / `just emacs update`   | Install or update Emacs (system build is pgtk, home build is nox)                 |

scripts/install-node.sh

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# fnm's install is OS-uniform (curl | bash), so no <os> arg is needed.
+
+# fnm (Fast Node Manager)
+# --skip-shell: the installer aborts with "Could not infer shell" when $SHELL is
+# unset (CI / non-interactive). Persistent shell integration lives statically in the
+# repo-tracked rc files (settings-bash/.bashrc, settings-zsh/.zshrc).
+if ! command -v fnm &>/dev/null; then
+  curl -fsSL https://fnm.vercel.app/install | bash -s -- --skip-shell
+fi
+
+# On Linux the installer drops fnm in ~/.local/share/fnm; on mac it uses Homebrew,
+# which is already on PATH (this prepend is then a harmless no-op).
+export PATH="$HOME/.local/share/fnm:$PATH"
+# --shell bash: this script always runs under bash (shebang + `bash ...` in the
+# recipe), and fnm's process-tree shell detection is unreliable in CI
+# (su -l ci -c ... just), emitting nothing so a later `fnm use` aborts with
+# "We can't find the necessary environment variables". Forcing the shell is safe
+# regardless of the user's interactive shell.
+eval "$(fnm env --shell bash)"
+
+# Already fully set up (fnm present with Node + pnpm) — nothing to do.
+if command -v pnpm &>/dev/null; then
+  echo "fnm and pnpm are already installed"
+  fnm --version
+  node --version
+  pnpm --version
+  exit 0
+fi
+
+# Node LTS provides corepack, which provides pnpm
+fnm install --lts
+fnm use lts-latest
+fnm default lts-latest
+
+# Enable pnpm shim via corepack
+corepack enable pnpm
+
+fnm --version
+node --version
+pnpm --version

settings-bash/.bashrc

@@ -172,6 +172,10 @@ case ":$PATH:" in
         ;;
 esac
 
+# fnm (Node version manager)
+export PATH="$HOME/.local/share/fnm:$PATH"
+command -v fnm >/dev/null && eval "$(fnm env --use-on-cd)"
+
 # ble.sh attach and keybindings
 if [[ ${BLE_VERSION-} ]]; then
     ble-bind -m auto_complete -f 'S-TAB' auto_complete/insert

settings-zsh/.zshrc

@@ -79,6 +79,10 @@ export PATH
 
 # <<< juliaup initialize <<<
 
+# fnm (Node version manager)
+export PATH="$HOME/.local/share/fnm:$PATH"
+command -v fnm >/dev/null && eval "$(fnm env --use-on-cd)"
+
 [ -f "$HOME/.ghcup/env" ] && source "$HOME/.ghcup/env" # ghcup-envexport PYENV_ROOT="$HOME/.pyenv"
 [[ -d $PYENV_ROOT/bin ]] && export PATH="$PYENV_ROOT/bin:$PATH"
 eval "$(pyenv init -)"