# Shared by the bin/ helpers. The main checkout holds the venv and the
# (gitignored) vault files that every worktree uses.
repo=$(git rev-parse --show-toplevel)
main_checkout=$(git -C "$repo" worktree list --porcelain | awk '/^worktree /{print $2; exit}')
lock_dir=${XDG_RUNTIME_DIR:-/tmp}/ansible-selfhosting
mkdir -p "$lock_dir" && chmod 700 "$lock_dir"

# take_lock NAME: wait for, then hold, a lock shared by every agent on this machine.
take_lock() {
    local name=$1
    exec 9>"$lock_dir/$name.lock"
    if ! flock -n 9; then
        echo "Waiting for $name lock, held by: $(cat "$lock_dir/$name.owner" 2>/dev/null || echo unknown)" >&2
        flock 9
    fi
    echo "$(basename "$repo") (pid $$, $(date '+%H:%M:%S'))" > "$lock_dir/$name.owner"
}

# Worktrees need the gitignored vault files from the main checkout.
link_vault() {
    [ "$repo" = "$main_checkout" ] && return
    [ -e "$repo/group_vars/all/vault.yml" ] || ln -s "$main_checkout/group_vars/all/vault.yml" "$repo/group_vars/all/vault.yml"
    [ -e "$repo/vault_pass" ] || ln -s "$main_checkout/vault_pass" "$repo/vault_pass"
}