Useful Bash functions

useful functions for .bashrc

# Syntax: "repeat [times to repeat] [command]"
# example: "repeat 
function repeat()
{
    local i max
    max=$1; shift;
    for ((i=1; i <= max ; i++)); do  # --> C-like syntax
        eval "$@";
    done
}


# Useful LS shortcuts
alias ll='ls -alF'
alias la='ls -A'
alias l='ls -CF'

alias ls="ls -pB --color"
alias la="ls -pA --color"
alias ll="ls -phl --color"      # long-form list
alias lla="ls -phlA --color"
alias lz="ls -pshS --color"     # sort by file size
alias lza="ls -pshSA --color"
alias lt="ls -pghotr --color"   # long-form, sort by modification date
alias lta="ls -pghotrA --color"
alias lx="ls -pghoX --color"    # sort by file extention
alias lxa="ls -pghoXA --color"
alias lr="ls -ARpsh --color"    # recursive list (watch out!  It will fill your screen!)

# Make some of the file manipulation programs verbose
alias mv="mv -v"
alias cp="cp -v"

# Make grep show with color
alias grep="grep --color"

# Make nano show line numbers
alias nano="nano -c"

# Cuck Norris Development Advice - because why not
function chuck() {
    curl https://api.chucknorris.io/jokes/random?category=dev 2> /dev/null | jq -r '.value'
}


# Make long directory trees on command
alias mkdir='mkdir -pv'

## a quick way to get out of current directory ##
alias cd..='cd ..'
alias ..='cd ..'
alias ...='cd ../../'
alias ....='cd ../../../'
alias .....='cd ../../../../'
alias ......='cd ../../../../../'
alias .......='cd ../../../../../../'
alias ........='cd ../../../../../../../'
alias .........='cd ../../../../../../../../'
alias ..........='cd ../../../../../../../../../'
alias ...........='cd ../../../../../../../../../../'
alias ............='cd ../../../../../../../../../../../'
alias .............='cd ../../../../../../../../../../../../'
alias ..............='cd ../../../../../../../../../../../../../'


# For mac only: lock's screen
function lock() {
  pmset displaysleepnow;
}


# List all EC2 boxes
# Ensure the AWS CLI is installed and
function ec2-boxes() {
  aws ec2 describe-instances --query "Reservations[*].Instances[*].{name: Tags[?Key=='Name'] | [0].Value, PrivateIP: PrivateIpAddress, PublicIp: PublicIpAddress, InstID: InstanceId, AZ: Placement.AvailabilityZone$
}

# Simple shell examples
# example: 'cheat.sh curl' and it outputs a number of common curl examples

cheat.sh()
{
    # replace native with the color scheme you want
    # curl cheat.sh/:styles-demo to show the available color schemes
    curl -s cheat.sh/"$1"?style=native
}

# Bash completion
_cheatsh_complete_cheatsh() 
{
    local cur opts #prev
    _get_comp_words_by_ref -n : cur

    COMPREPLY=()
    prev="${COMP_WORDS[COMP_CWORD-1]}"
    opts="$(curl -s cheat.sh/:list)"

    #if [[ "${cur}" == ch ]] ; then
                COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                __ltrim_colon_completions "$cur"
        return 0
    #fi  
}

complete -F _cheatsh_complete_cheatsh cheat.sh

# Set the default editor
export EDITOR=nano

# Json validator and formatter
# Example: 'curl example.com/file.json | json' - outputs formatted json
alias json="python -m json.tool"
alias jsonf="python -m json.tool"

# simple 'replace' tool for files
# Example: 'replace "oldstr" "newstr" file.txt' - replaces oldstr with newstr in file.txt
function replace {
  sed -i "s/$(echo $1 | sed -e 's/\([[\/.*]\|\]\)/\\&/g')/$(echo $2 | sed -e 's/[\/&]/\\&/g')/g" $3
}

# Can't remember the syntax to open a tar?
alias untar="tar -zxvf"

function rr() {
  curl -s -L https://raw.githubusercontent.com/keroserene/rickrollrc/master/roll.sh 2> /dev/null | bash
}