dotfiles/shell/shell_functions

#!/bin/bash

# Create a new directory and enter it
function md() {
  mkdir -p "$@" && cd "$@"
}

# find shorthand
function f() {
  find . -name "$1" 2>&1 | grep -v 'Permission denied'
}

# List all files, long format, colorized, permissions in octal
function la(){
   ls -l  "$@" | awk '
    {
      k=0;
      for (i=0;i<=8;i++)
        k+=((substr($1,i+2,1)~/[rwx]/) *2^(8-i));
      if (k)
        printf("%0o ",k);
      printf(" %9s  %3s %2s %5s  %6s  %s %s %s\n", $3, $6, $7, $8, $5, $9,$10, $11);
    }'
}

# cd into whatever is the forefront Finder window.
cdf() {  # short for cdfinder
  cd "`osascript -e 'tell app "Finder" to POSIX path of (insertion location as alias)'`"
}


# Start an HTTP server from a directory, optionally specifying the port
function server() {
  local port="${1:-8000}"
  open "http://localhost:${port}/"
  # Set the default Content-Type to `text/plain` instead of `application/octet-stream`
  # And serve everything as UTF-8 (although not technically correct, this doesn’t break anything for binary files)
  python -c $'import SimpleHTTPServer;\nmap = SimpleHTTPServer.SimpleHTTPRequestHandler.extensions_map;\nmap[""] = "text/plain";\nfor key, value in map.items():\n\tmap[key] = value + ";charset=UTF-8";\nSimpleHTTPServer.test();' "$port"
}


# Copy w/ progress
cp_p () {
  rsync -WavP --human-readable --progress $1 $2
}

# qfind - used to quickly find files that contain a string in a directory
qfind () {
  find . -exec grep -l -s $1 {} \;
  return 0
}

# get gzipped size
function gz() {
  echo "orig size    (bytes): "
  cat "$1" | wc -c
  echo "gzipped size (bytes): "
  gzip -c "$1" | wc -c
}

# whois a domain or a URL
function whois() {
  local domain=$(echo "$1" | awk -F/ '{print $3}') # get domain from URL
  if [ -z $domain ] ; then
    domain=$1
  fi
  echo "Getting whois record for: $domain …"

  # avoid recursion
          # this is the best whois server
                          # strip extra fluff
  /usr/bin/whois -h whois.internic.net $domain | sed '/NOTICE:/q'
}

function localip(){
  function _localip(){ echo "📶  "$(ipconfig getifaddr "$1"); }
  export -f _localip
  local purple="\x1B\[35m" reset="\x1B\[m"
  networksetup -listallhardwareports | \
    sed -r "s/Hardware Port: (.*)/${purple}\1${reset}/g" | \
    sed -r "s/Device: (en.*)$/_localip \1/e" | \
    sed -r "s/Ethernet Address:/📘 /g" | \
    sed -r "s/(VLAN Configurations)|==*//g"
}

# Extract archives - use: extract <file>
# Based on http://dotfiles.org/~pseup/.bashrc
function extract() {
  if [ -f "$1" ] ; then
    local filename=$(basename "$1")
    local foldername="${filename%%.*}"
    local fullpath=`perl -e 'use Cwd "abs_path";print abs_path(shift)' "$1"`
    local didfolderexist=false
    if [ -d "$foldername" ]; then
      didfolderexist=true
      read -p "$foldername already exists, do you want to overwrite it? (y/n) " -n 1
      echo
      if [[ $REPLY =~ ^[Nn]$ ]]; then
        return
      fi
    fi
    mkdir -p "$foldername" && cd "$foldername"
    case $1 in
      *.tar.bz2) tar xjf "$fullpath" ;;
      *.tar.gz) tar xzf "$fullpath" ;;
      *.tar.xz) tar Jxvf "$fullpath" ;;
      *.tar.Z) tar xzf "$fullpath" ;;
      *.tar) tar xf "$fullpath" ;;
      *.taz) tar xzf "$fullpath" ;;
      *.tb2) tar xjf "$fullpath" ;;
      *.tbz) tar xjf "$fullpath" ;;
      *.tbz2) tar xjf "$fullpath" ;;
      *.tgz) tar xzf "$fullpath" ;;
      *.txz) tar Jxvf "$fullpath" ;;
      *.zip) unzip "$fullpath" ;;
      *) echo "'$1' cannot be extracted via extract()" && cd .. && ! $didfolderexist && rm -r "$foldername" ;;
    esac
  else
    echo "'$1' is not a valid file"
  fi
}

# who is using the laptop's iSight camera?
camerausedby() {
  echo "Checking to see who is using the iSight camera… 📷"
  usedby=$(lsof | grep -w "AppleCamera\|USBVDC\|iSight" | awk '{printf $2"\n"}' | xargs ps)
  echo -e "Recent camera uses:\n$usedby"
}


# animated gifs from any video
# from alex sexton   gist.github.com/SlexAxton/4989674
gifify() {
  if [[ -n "$1" ]]; then
  if [[ $2 == '--good' ]]; then
    ffmpeg -i $1 -r 10 -vcodec png out-static-%05d.png
    time convert -verbose +dither -layers Optimize -resize 900x900\> out-static*.png  GIF:- | gifsicle --colors 128 --delay=5 --loop --optimize=3 --multifile - > $1.gif
    rm out-static*.png
  else
    ffmpeg -i $1 -s 600x400 -pix_fmt rgb24 -r 10 -f gif - | gifsicle --optimize=3 --delay=3 > $1.gif
  fi
  else
  echo "proper usage: gifify <input_movie.mov>. You DO need to include extension."
  fi
}

# turn that video into webm.
# brew reinstall ffmpeg --with-libvpx
webmify(){
  ffmpeg -i $1 -vcodec libvpx -acodec libvorbis -isync -copyts -aq 80 -threads 3 -qmax 30 -y $2 $1.webm
}


# visual studio code. a la `subl`
code () {
  if [[ $# = 0 ]]
  then
    open -a "Visual Studio Code"
  else
    [[ $1 = /* ]] && F="$1" || F="$PWD/${1#./}"
    open -a "Visual Studio Code" --args "$F"
  fi
}

# `shellswitch [bash |zsh]`
#   Must be in /etc/shells
shellswitch () {
  chsh -s $(brew --prefix)/bin/$1
}