#!/bin/sh
# .profile - init script for Bourne-like shells (sh, ksh, bash, dash, zsh)

# set the default file creation mask to something reasonably safe

umask 022

# set the PATH to directories where binaries are usually located

PATH=/sbin:/bin:/usr/sbin:/usr/bin:/opt/local/sbin:/opt/local/bin
PATH=$PATH:/usr/X11R6/bin:/usr/local/sbin:/usr/local/bin
PATH=$PATH:/usr/games:/usr/local/zfs/bin:/usr/local/games:$HOME/bin
export PATH

# disable per-session history in bash and zsh on MacOSX
# see: https://stackoverflow.com/a/54338056
#      https://superuser.com/a/1610999
# also remember to create $HOME/.bash_sessions_disable

SHELL_SESSION_HISTORY=0
SHELL_SESSIONS_DISABLE=1

export SHELL_SESSION_HISTORY SHELL_SESSIONS_DISABLE

case $- in

    # interactive shell startup

    *i*)

        # default prompt

        PS1='$ '
        PS2='> '

        # change the prompt if running as root (e.g. via su)

        if [ X"$EUID" = X"0" ] ; then
            PS1='# '
            PS2='#> '
        else

            # only include home directory, documents, and src in CDPATH
            # if not running as root

            CDPATH=".:$HOME:$HOME/Documents:$HOME/Documents/src"
        fi

        # default the editor to vi

        EDITOR="vi"
        VISUAL="$EDITOR"
        FCEDIT="$EDITOR"

        # default to more unless less is available

        PAGER="more"
        if type less > /dev/null 2>&1 ; then

            PAGER="less"

            # disable terminal init in less, and use raw control characters
            LESS="-XR"

            # disable less' history and use secure mode

            LESSHISTFILE="/dev/null"
            LESSHISTSIZE="0"
            LESSSECURE="1"

            export LESS LESSHISTFILE LESSHISTSIZE LESSSECURE
        fi

        # set the scale for dc to 20 (same as bc -l)

        DC_ENV_ARGS="-e 10k"

        # export variables for interactive shells

        export PS1 PS2 CDPATH EDITOR VISUAL FCEDIT PAGER DC_ENV_ARGS

        # remove all aliases, if possible

        unalias -a > /dev/null 2>&1

        # shell options

        case "$0" in
            *bash*)
                set -o emacs ignoreeof noclobber
                PS1='\h\$ '
                ENV="$HOME/.profile"
                HISTFILE=/dev/null
                ;;
            *dash*)
                set -o emacs ignoreeof noclobber
                ENV="$HOME/.profile"
                HISTFILE=/dev/null
                ;;
            *zsh*)
                bindkey -e
                set -o IGNORE_EOF MARK_DIRS
                PS1="%m%# "
                ENV="$HOME/.profile"
                HISTFILE=/dev/null
                ;;
            *ksh*)

                # ksh options, may not be available in all versions

                set -o emacs       > /dev/null 2>&1
                set -o ignoreeof   > /dev/null 2>&1
                set -o noclobber   > /dev/null 2>&1
                set -o markdirs    > /dev/null 2>&1
                set -o csh-history > /dev/null 2>&1

                # bash style tab completion in emacs mode

                if type bind > /dev/null 2>&1 ; then
                   bind "^I=complete-list"
                   #bind "^I=complete"
                   #bind "^I^I=complete-list"
                fi

                # ignore duplicates in command history

                HISTCONTROL=ignoredups
                export HISTCONTROL

                # for interactive ksh sessions, load
                # customizations in .kshrc

                ENV="$HOME/.kshrc"

                ;;
        esac

        export ENV HISTFILE

        if [ X"$ENV" != X"$HOME/.kshrc" ] ; then

            # create helpful aliases, if possible

            if type alias > /dev/null 2>&1 ; then

                unalias cp mv rm ls yes y gti suod bc w3m > /dev/null 2>&1

                alias cp="/bin/cp -i"
                alias mv="/bin/mv -i"
                alias rm="/bin/rm -i"
                alias ls="/bin/ls -aFC"
                alias yes="echo yes"
                alias y="echo y"

                # alias for typos

                alias gti="git"
                alias suod="sudo"

                # run bc with -l option to load the math
                # library so that we get floating point
                # math, instead of just integer math

                alias bc="bc -l" > /dev/null 2>&1

                # run w3m in monochrome mode

                alias w3m="w3m -M" > /dev/null 2>&1
            else

                # create some functions

                cp () { /bin/cp -i "$@" ; }
                mv () { /bin/mv -i "$@" ; }
                rm () { /bin/rm -i "$@" ; }
                ls () { /bin/ls -aFC "$@" ; }
                yes() { echo "yes" ; }
                y()   { echo "y" ; }
            fi
        fi

        ;;
esac

# load a local shell startup file, if present

if [ -r "$HOME/.profile_local" ] ; then
    . "$HOME/.profile_local"
fi