start

#!/bin/sh

set -e
set -u

xdg_dirs() {
    local dirs home
    eval "dirs=\${XDG_$1_DIRS:-}; home=\${XDG_$1_HOME:-}"
    if [ -n "${dirs:-}" ]; then
        echo "$dirs"
    elif [ -n "${home:-}" ]; then
        echo "$home"
    else
        echo "$HOME/$2"
    fi
}

HERE="$(dirname "$(readlink -e "$0")")"
SOCKET_DIR="${XDG_RUNTIME_DIR:-/tmp}/Bretts"
EMACS_SOCKET_NAME="$SOCKET_DIR/Emacs"
export PATH="$PATH:$HERE/.local/bin"
export SCREENDIR="$SOCKET_DIR/screen"
export TMUX_TMPDIR="$SOCKET_DIR"
export XDG_CONFIG_DIRS="$HERE/.config:$(xdg_dirs CONFIG .config)"
export XDG_CONFIG_HOME="$HERE/.config"
export XDG_DATA_DIRS="$HERE/data:$(xdg_dirs DATA .local/share)"
export XDG_DATA_HOME="$HERE/data"
export XDG_STATE_DIRS="$HERE/state:$(xdg_dirs STATE .local/state)"
export XDG_STATE_HOME="$HERE/state"
export ZDOTDIR="$XDG_CONFIG_HOME/bcsh"
unset DISPLAY WAYLAND_DISPLAY

if ! SHELL="$(which zsh 2>/dev/null)"; then
    SHELL="$HERE/bcsbash"
fi
export SHELL

mkdir -p --mode=0700 "$SCREENDIR" "$XDG_DATA_HOME" "$XDG_STATE_HOME"
umask 027

if command -v emacsclient >/dev/null; then
    emacs_eval() {
        if [ $# = 0 ]; then
            set -- t
        fi
        emacsclient --socket-name="$EMACS_SOCKET_NAME" --alternate-editor=false \
                    --eval "$@" >/dev/null 2>&1
    }
    emacs_load=true
    if emacs_eval; then
        emacs_load=false
    elif [ -e "/var/lib/systemd/linger/$USER" ]; then
        systemd-run --user \
            --unit="brett-emacs-$(date +%Y-%m-%dT%H:%M)" \
            emacs --fg-daemon="$EMACS_SOCKET_NAME" --no-init-file
    else
        emacs --daemon="$EMACS_SOCKET_NAME" --no-init-file
    fi
    if $emacs_load; then
        while ! emacs_eval; do
            sleep .1
        done
        nohup emacsclient --socket-name="$EMACS_SOCKET_NAME" \
              --eval "(load-file \"$XDG_CONFIG_HOME/emacs/init.el\")" \
              >>"$SOCKET_DIR/Emacs.log" 2>&1 &
    fi
    export EMACS_SOCKET_NAME
fi

exec "$HERE/.local/bin/reattach" -C "$HERE"