# Make bash a little more pleasent - these are valid for all versions.
shopt -s cdspell checkhash checkwinsize cmdhist histappend no_empty_cmd_completion

# Exit the shell on a Ctl+D.
IGNOREEOF=0

# History control.
HISTCONTROL="ignoredups"
HISTFILE="$HOME/.bash_history-${HOSTNAME%%.*}"
HISTFILESIZE=100000
HISTIGNORE="bg:bg *:fg:fg *:jobs:exit:clear:history"
HISTSIZE=-1
HISTTIMEFORMAT="%d/%m/%y %H:%M:%S  "
history -r

# Determine the colour of the username in the prompt.
if (( $(id -u) == 0 )); then
  COLOUR=1	# Red
else
  COLOUR=2	# Green
fi

# Version specific set up.
if (( ${BASH_VERSINFO[0]} >= 4 )); then
  # Add to the shopts.
  shopt -s checkjobs dirspell

  # Set the prompts.
  PROMPT_DIRTRIM=2
  # No colour:
  # PS1="[\u@\h] \w ->"
  # Coloured username:
  # PS1="[\[$(tput bold)$(tput setaf $COLOUR)\]\u\[$(tput sgr0)\]@\h] \w ->"
  # Coloured username + host:
  # PS1="[\[$(tput bold)$(tput setaf $COLOUR)\]\u\[$(tput sgr0)\]@\[$(tput bold)$(tput setaf 3)\]\h\[$(tput sgr0)\]] \w ->"
  # Coloured username + host + directory:
  PS1="[\[$(tput bold)$(tput setaf $COLOUR)\]\u\[$(tput sgr0)\]@\[$(tput bold)$(tput setaf 3)\]\h\[$(tput sgr0)\]] \[$(tput bold)$(tput setaf 4)\]\w\[$(tput sgr0)\] ->"
else
  # Set the prompts.
  # No colour:
  # PS1="[\u@\h] \$(echo \"\${PWD/#\$HOME/~}\" | awk -F/ '{if (NF>3) {printf \".../\" \$(NF-1) \"/\" \$NF} else {printf \$0}}') ->"
  # Coloured username:
  # PS1="[\[$(tput bold)$(tput setaf $COLOUR)\]\u\[$(tput sgr0)\]@\h] \$(echo \"\${PWD/#\$HOME/~}\" | awk -F/ '{if (NF>3) {printf \".../\" \$(NF-1) \"/\" \$NF} else {printf \$0}}') ->"
  # Coloured username + host:
  # PS1="[\[$(tput bold)$(tput setaf $COLOUR)\]\u\[$(tput sgr0)\]@\[$(tput bold)$(tput setaf 3)\]\h\[$(tput sgr0)\]] \$(echo \"\${PWD/#\$HOME/~}\" | awk -F/ '{if (NF>3) {printf \".../\" \$(NF-1) \"/\" \$NF} else {printf \$0}}') ->"
  # Coloured username + host + directory:
  PS1="[\[$(tput bold)$(tput setaf $COLOUR)\]\u\[$(tput sgr0)\]@\[$(tput bold)$(tput setaf 3)\]\h\[$(tput sgr0)\]] \[$(tput bold)$(tput setaf 4)\]\$(echo \"\${PWD/#\$HOME/~}\" | awk -F/ '{if (NF>3) {printf \".../\" \$(NF-1) \"/\" \$NF} else {printf \$0}}')\[$(tput sgr0)\] ->"
fi
unset COLOUR

# Set the debugger prompt.
# PS4="+(\\\$? = \$?) \${BASH_SOURCE##*/}\${FUNCNAME:+(\$FUNCNAME)}:\$LINENO: "
# PS4="+(\[\e[33m\]\\\$? = \$?\[$(tput sgr0)\]) \[$(tput bold)$(tput setaf 4)\]\${BASH_SOURCE##*/}\[$(tput sgr0)\]\${FUNCNAME:+(\[$(tput bold)$(tput setaf 2)\]\$FUNCNAME\[$(tput sgr0)\])}:\[$(tput bold)$(tput setaf 1)\]\$LINENO\[$(tput sgr0)\]: "
export PS4="+(\[\e[33m\]\$?\[$(tput sgr0)\]) \[$(tput bold)$(tput setaf 4)\]\${BASH_SOURCE##*/}\[$(tput sgr0)\]\${FUNCNAME:+(\[$(tput bold)$(tput setaf 2)\]\$FUNCNAME\[$(tput sgr0)\])}:\[$(tput bold)$(tput setaf 1)\]\$LINENO\[$(tput sgr0)\]: "

# The commands to execute before the prompt is displayed.
# PROMPT_COMMAND=""

# Platform specific set up.
PLATFORM="$(uname -s)"
if [[ "$PLATFORM" = "Linux" ]]; then
  # Linux specific aliases.
  hash ftpwho >/dev/null 2>&1 && alias ftpwho='ftpwho -v'
  hash iftop >/dev/null 2>&1 && alias iftop='TERM=vt100 iftop'
  hash last less >/dev/null 2>&1 && alias laston='last -a | less'
  hash ls >/dev/null 2>&1 && alias ls='ls -bFv --color=auto'
  hash minicom >/dev/null 2>&1 && alias minicom='minicom -m -c on'
  hash mkpasswd >/dev/null 2>&1 && alias pwgen='mkpasswd -m sha512crypt'
  hash pine >/dev/null 2>&1 && alias pine='pine -p "{mail.opensourcerers.net/Service=IMAP/User=darren@afterdark.org.uk/TLS/NoValidate-Cert/NoRsh}.pinerc"'
  hash pinfo >/dev/null 2>&1 && alias info='pinfo'
  hash ping >/dev/null 2>&1 && alias ping='ping -b'

  # Linux specific functions.
  psgrep() {
    ps -auwwx | egrep "(RSS|$1)" | fgrep -v "(RSS|"
  }
elif [[ "$PLATFORM" = "Darwin" ]]; then
  # Darwin specific aliases.
  hash df >/dev/null 2>&1 && alias df='df -P'
  hash ls >/dev/null 2>&1 && alias ls='ls -bFG'
  hash top >/dev/null 2>&1 && alias top='top -o cpu -S'
else
  echo "${BASH_SOURCE##*/}: unsupported platform: $PLATFORM" >&2
fi
unset PLATFORM

# Common aliases.
hash bc >/dev/null 2>&1 && alias bc='bc -lq'
#hash curl >/dev/null 2>&1 && alias pastebin="curl -F 'sprunge=<-' http://sprunge.us"
hash curl >/dev/null 2>&1 && imagebin() { curl -F file="@${1:-}" https://imagebin.ca/upload.php | grep ^url: | cut -d: -f2-; }
hash diff >/dev/null 2>&1 && alias diff='diff -u'
hash egrep >/dev/null 2>&1 && alias egrep='egrep --color=auto'
hash fgrep >/dev/null 2>&1 && alias fgrep='fgrep --color=auto'
hash grep >/dev/null 2>&1 && alias grep='grep --color=auto'
hash nc >/dev/null 2>&1 && alias pastebin='nc termbin.com 9999'
hash screen >/dev/null 2>&1 && alias screen='screen -Ua'