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gnu-plus-dotfiles/run_onchange_30-ensure-cargo.sh.tmpl

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#!/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`).
# Also install topgrade (universal update tool) and cargo-update (so cargo
# packages themselves can be bumped). Prefer OS package managers when
# available — only fall back to `cargo install` if the package isn't in
# apt/pacman/chaotic-aur.
#
# 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 (upstream binary, not renamed batcat) ---
# On debian, apt installs bat as "batcat" (Debian has its own unrelated bat).
# The clean fix is cargo install on debian, pacman on arch, portage on gentoo.
{{ if eq .os_family "debian" -}}
if ! command -v bat >/dev/null 2>&1; then
log "installing bat via cargo (debian renames upstream bat to batcat)"
cargo install bat --locked
log "bat installed: $(bat --version)"
else
log "bat already installed: $(bat --version)"
fi
{{ else if eq .os_family "gentoo" -}}
# Gentoo: app-text/bat is in main, ships upstream binary
if ! command -v bat >/dev/null 2>&1; then
log "WARNING: bat not installed — should have been installed by run_once_20"
else
log "bat already installed (gentoo: app-text/bat): $(bat --version)"
fi
{{ else -}}
# Arch already installs upstream bat via pacman [extra].
log "skipping cargo bat install (os_family={{ .os_family }}, pacman handles it)"
{{ end -}}
# --- 3. Install topgrade (universal update tool) ---
# topgrade walks through system packages, language toolchains, dev tools,
# and runs each one's update command. It's a single command for "update
# everything on this box."
# - arch: topgrade is in [chaotic-aur] (we have chaotic-aur configured).
# Use pacman to get system-tracked installs.
# - debian: topgrade isn't in apt. Install via cargo (no PM alternative).
# - gentoo: topgrade is in GURU overlay. Use emerge.
if ! command -v topgrade >/dev/null 2>&1; then
{{ if eq .os_family "arch" -}}
if sudo grep -q "^\[chaotic-aur\]" /etc/pacman.conf; then
log "installing topgrade via pacman (chaotic-aur)"
sudo pacman -S --needed --noconfirm topgrade
else
log "chaotic-aur not configured — falling back to cargo install topgrade"
cargo install topgrade --locked
fi
{{ else if eq .os_family "debian" -}}
log "installing topgrade via cargo (debian has no topgrade package)"
cargo install topgrade --locked
{{ else if eq .os_family "gentoo" -}}
log "installing topgrade via emerge (gentoo: app-misc/topgrade in GURU)"
sudo emerge --ask=n --nospinner --quiet-build app-misc/topgrade
{{ else -}}
log "WARNING: topgrade install not configured for os_family={{ .os_family }}"
{{ end -}}
log "topgrade installed: $(topgrade --version | head -1)"
else
log "topgrade already installed: $(topgrade --version | head -1)"
fi
# --- 4. Install cargo-update (so we can `cargo install-update -a`) ---
# Used to bump cargo-installed packages. Arch has it in [extra]; debian
# doesn't ship it; gentoo has it in main (dev-util/cargo-update).
if ! command -v cargo-install-update >/dev/null 2>&1; then
{{ if eq .os_family "arch" -}}
log "installing cargo-update via pacman"
sudo pacman -S --needed --noconfirm cargo-update
{{ else if eq .os_family "debian" -}}
log "installing cargo-update via cargo (debian has no cargo-update package)"
cargo install cargo-update --locked
{{ else if eq .os_family "gentoo" -}}
log "installing cargo-update via emerge (gentoo: dev-util/cargo-update)"
sudo emerge --ask=n --nospinner --quiet-build dev-util/cargo-update
{{ else -}}
log "WARNING: cargo-update install not configured for os_family={{ .os_family }}"
{{ end -}}
log "cargo-update installed"
else
log "cargo-update already installed"
fi