#!/usr/bin/env bash
# =============================================================================
#  run_once_05-add-gentoo-overlays.sh.tmpl  (gentoo-only)
#  Add the GURU overlay to the portage repository list. GURU is the
#  community overlay (like AUR for arch) where packages like bun, eza,
#  sway, etc. live when they're not in the main tree.
#
#  Idempotent: skips if GURU is already enabled.
#  Run-order: 00 (bootstrap) → 05-overlays (here) → 10-add-{chaotic,debian}
#  → 20-install-packages → 40-install-sway
# =============================================================================
set -euo pipefail

log() { printf '\033[1;34m[overlays]\033[0m %s\n' "$*"; }
die() { printf '\033[1;31m[overlays ERROR]\033[0m %s\n' "$*" >&2; exit 1; }

# This script is gentoo-only. Guarded by the chezmoi template engine;
# on arch/debian it never renders (only this single file path).

if [[ ! -d /var/db/repos/gentoo ]]; then
    die "/var/db/repos/gentoo missing — this doesn't look like a gentoo system"
fi

# --- 1. GURU overlay ---
# User explicitly requires GURU. Per the bootstrap-runbook skill: gentoo
# boxes without GURU can't install most of the user packages (eza, fzf,
# fd-find on stable, lazygit, topgrade, etc.) because they only ship in
# the main tree as ~amd64 or only live in GURU.
if [[ -d /var/db/repos/guru ]]; then
    log "GURU overlay already enabled at /var/db/repos/guru — skipping"
else
    log "enabling GURU overlay via eselect repository"
    # `eselect repository` needs the overlays.xml index; sync first if missing
    if ! sudo eselect repository list 2>&1 | grep -qi guru; then
        log "fetching overlays.xml index"
        sudo emaint sync --auto
    fi
    sudo eselect repository enable guru
    # Sync just the new repo so we don't re-pull the entire gentoo tree
    log "syncing GURU overlay"
    sudo emaint sync -r guru
    log "GURU overlay enabled and synced"
fi

# --- 2. Verify ---
log "enabled overlays:"
eselect repository list 2>&1 | sed 's/^/  /'

# Verify the GURU repo is readable
if [[ ! -f /var/db/repos/guru/profiles/repo_name ]]; then
    die "/var/db/repos/guru/profiles/repo_name missing — overlay didn't sync cleanly"
fi
GURU_NAME=$(cat /var/db/repos/guru/profiles/repo_name)
log "GURU repo verified: $GURU_NAME"

log "overlays ready"