#!/bin/sh

# Environment variables for X and all text-mode shells: bash, Xsession
# and scripts run by cron all source this.  So POSIX only.

# We have calls to `which` which we expect to fail
set +e

# ---- choose editor depending on what's available

if [ "$DESKTOP_SESSION" = "i3" ] \
       || [ "$DESKTOP_SESSION" = "xfce" ] \
       || [ "XDG_CURRENT_DESKTOP" = "sway" ]; then
    ec_opt="-c"
else
    ec_opt="-t"
fi

# Either GNU Emacs, or UNIX vi -- lightweight Emacs alternatives like mg and
# zile are so rarely installed, so let's have a constant fallback which is
# almost certainly available and which I can use well enough.
#
# Rely on my ~/src/dotfiles/bin/emacsclient wrapper to start up an Emacs
# daemon: don't bother setting ALTERNATE_EDITOR.  Check that there's an Emacs
# on (as yet unmodified) PATH, else that wrapper might fail.
if command -v emacs >/dev/null; then
    EDITOR="emacsclient $ec_opt"
else
    EDITOR="vi"
fi
unset ec_opt
export EDITOR
VISUAL="$EDITOR"
export VISUAL

# ---- set $PATH

# this function prepends $addition to $PATH iff $addition isn't
# already in $PATH and $addition is a directory
maybe_add_to_path ()
{
    if ! echo $PATH | grep -q "$addition"; then
        if [ -d "$addition" ]; then
            PATH="$addition:$PATH"
        fi
    fi
}

addition="/sbin";                                 maybe_add_to_path
addition="/usr/sbin";                             maybe_add_to_path
addition="/usr/local/bin";                        maybe_add_to_path
addition="/usr/pkg/bin";                          maybe_add_to_path
addition="$HOME/local/pkg/bin";                   maybe_add_to_path
addition="$HOME/local/pkg/sbin";                  maybe_add_to_path
addition="$HOME/src/dotfiles/bin";                maybe_add_to_path
addition="$HOME/local/bin";                       maybe_add_to_path
addition="$HOME/.cabal/bin";                      maybe_add_to_path
addition="$HOME/.local/bin";                      maybe_add_to_path
addition="/meta/s/spw/local/src/git-annex.linux"; maybe_add_to_path
unset addition

export PATH

# ---- package management by Nix: add to $PATH once more

# # crude heuristic to determine if it's already been added
# if ! echo $PATH | grep -q "$HOME/.nix-profile/bin"; then
#     if [ -e "/etc/profile.d/nix.sh" ]; then
#         . /etc/profile.d/nix.sh
#     fi
# fi

# ---- set language (snippet from joeyh's home-etc.git repo)

# TODO: according to <https://wiki.debian.org/Locale>, I ought not to
# be setting LC_ALL.  Instead I could set most of LC_* to en_GB.UTF-8,
# and some e.g. LC_PAPER to en_US.UTF-8.

# disabled: propellor setting it system-wide on my machines and that's
# enough

# case " $(echo $(locale -a)) " in
#     *\ en_GB.utf8\ *) LANG=en_GB.utf8 ;;
#     *\ en_GB.UTF-8\ *) LANG=en_GB.UTF-8 ;;
#     *\ C.UTF-8\ *) LANG=C.UTF-8 ;;
#     *\ C.utf8\ *) LANG=C.utf8 ;;
#     *) unset LANG ;;
# esac

# LC_ALL=$LANG
# export LC_ALL
# export LANG

# ---- further preferences

# LD_RUN_PATH="$HOME/local/lib/"
# export LD_RUN_PATH
# LD_LIBRARY_PATH="$HOME/local/lib/"
# export LD_LIBRARY_PATH

# "Setting the monitor port to 0 turns the monitoring function off,
# and autossh will only restart ssh upon ssh's exit."
#
# We rely on ServerAliveInterval and ServerAliveCountMax set in ~/.ssh/config
AUTOSSH_PORT=0
export AUTOSSH_PORT