.bash_profile misc functions

.bash_profile

#
# Nice prompt with nice colors for git
# Colors: master (red), dev (grey), other branches (green)
#
__set_prompt() {
    local _RESET="\033[0m\017"                  # reset color
    local _MASTER="\033[31m"                    # red
    local _DEV="\033[90m"                       # grey
    local _BRANCH="\033[32m"                    # green
    local ref="$(git symbolic-ref --short HEAD 2>/dev/null)"
    PS1="\u[\!]"
    if [[ ! -z $ref ]]; then
        case $ref in
            "master") PS1+="\[${_MASTER}\](${ref})\[${_RESET}\]" ;;
            "dev")  PS1+="\[${_DEV}\](${ref})\[${_RESET}\]" ;;
            *) PS1+="\[${_BRANCH}\](${ref})\[${_RESET}\]" ;;
        esac
    fi
    PS1+="\\$ "
}
PROMPT_COMMAND='__set_prompt'

edit() {
    /Applications/Emacs.app/Contents/MacOS/bin/emacsclient -nq "$@" || mg "$@"
}

wpaste() {
    local url=$(curl -sF 'sprunge=<-' http://sprunge.us)
    [[ $(uname -s) == 'Darwin' ]] && echo -n $url | pbcopy
    echo $url
}

diff-html() {
    local filediff=$(mktemp ~/tmp/$(logname)-diff.XXXXXX) || exit 1
    # Styles I like "monokai, paraiso-dark, native, murphy"
    git diff $1 > ${filediff}
    if [ -s ${filediff} ]; then
        pygmentize -l diff -f html -O full,style="paraiso-dark" -o ${filediff}.html ${filediff}
        rm -f ${filediff}
        open ${filediff}.html
    else
        echo "Diff file \"${filediff}\" empty."
    fi
}

colours() {
    for i in {0..255} ; do
        printf "\x1b[38;5;${i}m%-10s" "colour${i}"
        if [[ $(( i % 7 )) == 0 ]]; then
            echo
        fi
    done
    echo
}

genselfsigned () {
    if [ -z "$1" ]; then
        echo "Usage: genselfsigned [name] [key_len] [expire]" >&2
    else
        keylen=${2:-2048}
        expire=${3:-3650}       # roughly 10 years
        openssl genrsa -out $1.key 2048
        openssl req -new -key $1.key -out $1.csr
        openssl x509 -req -days 365 -in $1.csr -signkey $1.key -out $1.crt
    fi
}

genpass ()
{
    local pass=""
    local len=${1:-16}
    local chars="A-Za-z0-9?\!+$#"
    if [[ $((len % 4)) == 0 ]]; then
        pass=$(LC_ALL=C tr -dc $chars < /dev/urandom | hexdump -n $len -e '"%.4s-"')
        pass=${pass::$((len + (len / 4 - 1)))}
        echo $pass
        [[ $(uname -s) == 'Darwin' ]] && echo -n $pass | pbcopy
    else
        echo "Error: The password length must be a multiple of '4'" 1>&2
    fi
}

reverseip() {
    local ip=${1}
    local reverse=$(IFS=.; set -- $ip; echo "${4}.${3}.${2}.${1}")
    echo $reverse
}

mailfrom_ip() {
    local file=${1}
    sed -n '/^Received: from.*$/{N;N;s/^Received.*\[\(.*\)\].*by dos\.kas.*/\1/p;}' $file | sort -nu
}

alias work="tmux attach -t Work || tmux new-session -s Work -d '/Applications/Emacs.app/Contents/MacOS/Emacs -nw' \; split-window -h \; split-window -d \; select-pane -t +1 \; attach"