#!/usr/bin/env bash
# =============================================================================
#  run_onchange_30-ensure-cargo.sh.tmpl
#  Make sure rustup/cargo is available. If not, install rustup.
#  After cargo is ready, install bat from crates.io on debian (apt renames
#  upstream bat to batcat, which breaks .zshrc's `alias cat=bat`).
#
#  Runs on every apply because the script body rarely changes but we want a
#  fresh check after package installs.
# =============================================================================
set -euo pipefail

log() { printf '\033[1;34m[cargo]\033[0m %s\n' "$*"; }

# --- 1. Ensure cargo is on PATH ---
if ! command -v cargo >/dev/null 2>&1; then
    if command -v rustup >/dev/null 2>&1; then
        log "rustup present but cargo missing — running rustup default"
        rustup default stable
    else
        log "no cargo or rustup — installing rustup"
        sh -c "$(curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs)" -- -y --default-toolchain stable --profile minimal
        # shellcheck disable=SC1091
        source "$HOME/.cargo/env"
    fi
fi

# Ensure subsequent commands in this script can find cargo
export PATH="$HOME/.cargo/bin:$PATH"

log "rustup installed: $(rustup --version 2>/dev/null || echo unknown)"
log "cargo installed: $(cargo --version)"

# --- 2. Install bat from crates.io if missing (debian only) ---
{{ if eq .os_family "debian" -}}
if ! command -v bat >/dev/null 2>&1; then
    log "installing bat via cargo (upstream, debian renames it to batcat)"
    cargo install bat --locked
    log "bat installed: $(bat --version)"
else
    log "bat already installed: $(bat --version)"
fi
{{ else -}}
# Arch already installs upstream bat via pacman; nothing extra to do.
log "skipping cargo bat install (os_family={{ .os_family }}, pacman handles it)"
{{ end -}}