#!/bin/sh

# Main setup file executed for all kinds of shells
#
# For `bash`, if the following files exist,
# they have precedence over this file:
#  - ~/.bash_login
#  - ~/.bash_profile
#
# So, we make both source this file,
# and thus preserve the load order either way!


# Prevent loading ~/.profile twice in `bash`
PROFILE_LOADED=1


# Basic utilities

_command_exists() {
    command -v "$1" 1>/dev/null 2>&1
}

_in_bash() {
    [ -n "$BASH_VERSION" ]
}

_in_zsh() {
    [ -n "$ZSH_VERSION" ]
}

_prepend_to_path () {
    if [ -d "$1" ] ; then        # Ignore non-existing directories
        case :$PATH: in
            *:"$1":*) ;;         # Already in the `$PATH` => Do nothing
            *) PATH=$1:$PATH ;;  # Otherwise, prepend it
        esac
    fi
}

_remove_from_path () {
    _rest=$PATH                         # Not yet processed `$PATH`s
    _new=                               # `$PATH`s collected so far

    while [ -n "$_rest" ]; do           # Rebuild the `$PATH` entry by entry

        _dir=${_rest%%:*}               # First remaining entry

        case $_rest in
            *:*) _rest=${_rest#*:} ;;   # Drop that entry and its colon
              *) _rest= ;;              # Last entry read => Stop
        esac

        [ "$_dir" = "$1" ] && continue  # Skip on an exact match

        _new=${_new:+$_new:}$_dir       # Append, avoiding a leading colon

    done

    PATH=$_new

    unset _dir _new _rest
}


_remove_from_path "/usr/games"
_remove_from_path "/usr/local/games"

_prepend_to_path "$HOME/.local/bin"


# Needs ~/.local/bin on the `$PATH` already
# because it checks existence of some binaries
[ -f "$HOME/.config/shell/env" ] && . "$HOME/.config/shell/env"


[ -f "$HOME/.config/shell/aliases" ] && . "$HOME/.config/shell/aliases"


# Source ~/.profile_local, which holds machine-specific ENV variables
[ -f "$HOME/.profile_local" ] && . "$HOME/.profile_local"


# Load `bash`-specific configurations
if [ -n "$BASH_VERSION" ] && [ -f "$HOME/.bashrc" ]; then
    . "$HOME/.bashrc"
fi


# `zsh`-specific configurations are automatically sourced from ~/.zshrc,
# which then also ensures that this file is sourced


# When everything is loaded, show a little welcome message
case $- in *i*) [ -f "$HOME/.config/shell/welcome" ] && . "$HOME/.config/shell/welcome";; esac