Simple bashrc with nice prompt

bashrc

# simple bashrc with nice prompt
# link: https://gist.github.com/aslpavel/5925739
# install: wget --no-check-certificate -q -O - https://gist.github.com/aslpavel/5925739/download | tar -xzO -f- --strip-components=1 > "$HOME/.bashrc"

[ -z "$PS1" ] && return

### PROMPT
case $TERM in
linux|rxvt)
    col_user=3
    col_host=3
    col_base=0
    col_tags=(1 5 2)
    seg_sep=""
    seg(){
        echo -n "\\["
        test -z "$1" || echo -n "\\033[3$1m"
        test -z "$2" || echo -n "\\033[4$2m"
        echo -n "\\]$3\\[\\033[m\\]"
    }
;;
*)
    if [ "_$(tput colors 2>/dev/null)" != "_256" ]; then
        export TERM="xterm-256color"
    fi

    col_user=178
    col_host=136
    col_base=235
    col_tags=(131 61 29)
    seg_sep=$(printf "\xee\x82\xb0")
    seg(){
        echo -n "\\["
        test -z "$1" || echo -n "\\033[38;5;$1m"
        test -z "$2" || echo -n "\\033[48;5;$2m"
        echo -n "\\]$3\\[\\033[m\\]"
    }
;;
esac
if [ $UID -eq 0 ]; then
    col_tag=${col_tags[0]}
else
    case $(uname) in
    Darwin|FreeBSD)
        col_tag=${col_tags[1]}
    ;;
    Linux|CYGWIN*)
        col_tag=${col_tags[2]}
    ;;
    esac
fi
segs=("$(seg $col_user $col_base ' \u')"
      "$(seg $col_host $col_base '@\h ')"
      "$(seg $col_base $col_tag $seg_sep)"
      "$(seg $col_base $col_tag ' \w ')"
      "$(seg $col_tag '' $seg_sep' ')")
unset -f seg
unset col_user col_host col_base col_tag col_tags seg_sep
PS1=""
for seg in "${segs[@]}"; do
    PS1="${PS1}${seg}"
done
unset seg segs


### PATH
paths=("$HOME/.bin"
       "$HOME/.local/bin"
       "$HOME/.gem/ruby/2.0.0/bin"
       "$HOME/.cabal/bin"
       "/Berkanavt/bin"
       "/Berkanavt/bin/scripts"
       "/Berkanavt/antispam/scripts"
       "/Berkanavt/antispam/bin")
for path in "${paths[@]}"; do
    if echo -n "$path" | grep -q $PATH; then
        continue
    fi
    PATH="$path:$PATH"
done
export PATH
unset path paths


### VARIABLES
export EDITOR="vim"
export LANG="en_US.UTF-8"


### ALIASES
case $(uname) in
Darwin|FreeBSD)
    alias l='locate -i'
    alias ls='ls -GF'
;;
Linux|CYGWIN*)
    alias l='locate -ir'
    alias p_mem='ps -eo pid,pcpu,rss,vsize,stat,wchan,user,cmd --sort -rss'
    alias p_cpu='ps -eo pid,pcpu,rss,vsize,stat,wchan,user,cmd --sort -pcpu'
    if [ -x /usr/bin/dircolors ]; then
        eval $(dircolors -b)
        alias ls='ls --classify --color=auto'
        alias grep='grep --color=auto'
    fi
;;
esac


### FUNCTIONS
f(){
    find ./ -iname "*$1*"
}
bashrc_update(){
    local repo=https://gist.github.com/aslpavel/5925739/download
    wget --no-check-certificate -q -O - "$repo" |
    tar -xzO -f- --strip-components=1 > "$HOME/.bashrc"
    source "$HOME/.bashrc"
}


### SETTINGS
if [ -f /etc/bash_completion ] && ! shopt -oq posix; then
    . /etc/bash_completion
fi


### LS_COLORS
if test -f "$HOME/.config/dircolors" && type -f dircolors &>/dev/null; then
    eval $(dircolors "$HOME/.config/dircolors")
fi