dotfiles/home/shell/functions

# Functions gathered from around the internet
# Takes 1st argument and attempts to extract them in the current directory
extract () { # Extracts most common compressed files
        if [ -f $1 ] ; then
                case $1 in
                        *.tar.bz2)      tar xjf $1              ;;
                        *.tar.gz)       tar xzf $1              ;;
                        *.bz2)          bunzip2 $1              ;;
                        *.rar)          rar x $1                ;;
                        *.gz)           gunzip $1               ;;
                        *.tar)          tar xf $1               ;;
                        *.tbz2)         tar xjf $1              ;;
                        *.tgz)          tar xzf $1              ;;
                        *.zip)          unzip $1                ;;
                        *.Z)            uncompress $1   ;;
                        *)                      echo "'$1' cannot be extracted via extract()" ;;
                esac
        else
                echo "'$1' is not a valid file"
        fi
}
# Takes 1st argument and makes a .tar.gz archive
maketgz() { tar cvzf "${1%%/}.tar.gz"  "${1%%/}/"; }
# Takes 1st argument and makes a .zip archive
makezip() { zip -r "${1%%/}.zip" "$1" ; }
# Generate password - 1st argument is the number of characters, defaults to 20
gpass() {
        local l=$1
        [ "$l" == "" ] && l=20
        tr -dc A-Za-z0-9-!@%^*_ < /dev/urandom | head -c ${l} | xargs
}
# Shows the current PS list for the signed in user - Not cygwin compatible
myps() { ps $@ -u $USER -o pid,%cpu,%mem,bsdtime,command ; }
# Searches the process list (ps) for 1st argument
psgrep() {
        if [ ! -z $1 ] ; then
                echo "Grepping for processes matching $1..."
                ps aux | grep $1 | grep -v grep
        else
                echo "!! Need name to grep for"
        fi
}
# dirsize - finds directory sizes and lists them for the current directory
dirsize (){
        du -shx * .[a-zA-Z0-9_]* 2> /dev/null | \
        egrep '^ *[0-9.]*[MG]' | sort -n > /tmp/list
        egrep '^ *[0-9.]*M' /tmp/list
        egrep '^ *[0-9.]*G' /tmp/list
        rm -rf /tmp/list
}
# Usage: up <Number of directories>. Blank for up one dir.
up() {
    local d=""
    limit=$1
    for ((i=1; i <= limit; i++)); do
        d=$d/..
    done
    d=$(echo $d | sed 's/^\///')
    if [ -z "$d" ]; then
        d=..
    fi
    cd $d
}
# Usage: search <regex string>
search () {
    grep -r "$1" | fzf
}
# Usage: replay <number of commands> to repeat. Blank for 1
replay() {
    from="${1:-2}"
    to="${2:-1}"
    if [ "$from" -ne "$to" ]; then
        for i in `seq "$from" -1 "$(($to + 1))"`; do
            printf "$(fc -ln -${i} -${i}) && "
        done
    fi
    $(fc -ln -${to} -${to})
}