laughing-hipster/.bash_functions

#!/bin/bash
#vim: set ft=sh

IFS=$'\n$\t'

# delete merged local branches
function prunelocal(){
  for b in `git branch --merged | grep -v \*`; do git branch -D $b; done
}

# prints message of the day and a fortune
function printmotd(){
  if [[ $WORK ]]; then
    cat ~/work_motd 
  else
    cat ~/motd 
  fi

  if [[ -f $GOPATH/bin/fortune ]]; then
    echo ""
    $GOPATH/bin/fortune -file="$GOPATH/bin/fortunes.txt"
  elif [[ -f $(fortune) ]]; then
    echo "" 
    fortune
  fi
  echo ""
}

# prints battery percentage, only works on OSX
function batteryPercent(){
  ioreg -l | grep -i capacity | tr '\n' ' | ' | awk '{printf("%d", $10/$5 * 100)}'
}

# a shortcut for cloning from github
# usage: clone user/repo <dir>
function clone() {
  if [ -z "$1" ]; then
    echo "Missing git repository url ending"
    echo "usage: clone 'git repository ending' ['target directory name']"
  else
    giturl="git@github.com:$1.git"

    if [ -z "$2" ]; then
      # we DON'T HAVE a target directory
      git clone $giturl
    else
      # we HAVE a target directory
      git clone $giturl $2
    fi
  fi
}

# kill the process using the specified port
function freeport(){

  if [ -z $1 ]; then
    echo "usage: freeport <port number>" >&2
    return 1
  fi

  lsof -t -i tcp:$1 | xargs kill
}

# simplifies using docker-compose
function dcm(){
  docker-compose $@
}

# simplifies using docker-machine
function dm() {
  local TARGET=$2
  if [ -z "$2" ]; then
    TARGET="default"
  fi

  case $1 in
    "start" | "up" )

      if [ -z $(docker-machine ls | grep $TARGET) ]; then
        CREATE=false
        read -e -p "a machine named \"${TARGET}\" doesn't exist (yes to create): " CREATE
        if [[ $CREATE  == "yes" ]]; then
          docker-machine create --driver="virtualbox" $TARGET 
        else 
          echo "exiting"
          return 0
        fi
      fi

      if [ -z $(docker-machine status $TARGET | grep Running) ]; then
        docker-machine start $TARGET
      fi

      eval $(docker-machine env $TARGET) ;;

    "stop" | "halt" )

      echo "stopping docker machine..." 
      docker-machine stop $TARGET ;;

    "delete" | "destroy" )

      echo "destroying \"$TARGET\" machine..." 
      docker-machine rm $TARGET ;;

    "ip" )
      docker-machine ip $TARGET ;;

    "list" | "ls" )
      docker-machine ls ;;

    "rm" | "clean" )

      docker ps -a | grep "ago" | awk '{print $1}' | xargs docker rm ;;

    "rmi" )
      if [ -z $2 ]; then
        $2 = "weeks"
      fi

      docker images -a | grep "ago" | awk '{print $3}' | xargs docker rmi ;;

    "help" | "-h" | "--help" )
      echo "usage: dm COMMAND [arg]"
      echo "[machine name] is 'default' if not defined"
      echo "Commands:"
      echo " help | -h | --help               Shows this help text"
      echo " start | up [machine name]        Brings up a docker machine and adds variables to the environment"
      echo " stop | halt [machine name]       Stops the specified docker machine"
      echo " delete | destroy [machine name]  Destroys the specified docker machine"
      echo " list | ls                        Lists available machines"
      echo " ip [machine name]                Prints the ip address for this machine" 
      echo " rm | clean [text]                Deletes all containers matching [text]"
      echo " rmi [text]                       Deletes all images"
      echo " *                                Alias for docker-machine" 
    ;;

    * )
      docker-machine $@
    ;;

  esac
}


# `s` with no arguments opens the current directory in Sublime Text, otherwise
# opens the given location
function s() {
	if [ $# -eq 0 ]; then
		subl .;
	else
		subl "$@";
	fi;
}

# `a` with no arguments opens the current directory in Atom Editor, otherwise
# opens the given location
function a() {
	if [ $# -eq 0 ]; then
		atom .;
	else
		atom "$@";
	fi;
}

function vim(){
  local VIM_EXEC="/Applications/MacVim.app/Contents/MacOS/Vim";
  if [ -f $VIM_EXEC ]; then
    $VIM_EXEC "$@";
  else
    $(which vim) "$@";
  fi
}

# `v` with no arguments opens the current directory in Vim, otherwise opens the
# given location
function v(){
  if [[ $# -eq 0 ]]; then
    vim .;
  else
    vim --remote-tab-silent "$@";
  fi
}

# runs vim outside of the term by forking the command and gvim, great for my windows box
function vd(){
  if [[ $# -eq 0 ]]; then
    gvim &
  else
    gvim --remote-tab-silent "$@" &
  fi
}

# `o` with no arguments opens the current directory, otherwise opens the given
# location
function o() {
	if [ $# -eq 0 ]; then
		open .;
	else
		open "$@";
	fi;
}

# Simple calculator
function calc() {
	local result="";
	result="$(printf "scale=10;$*\n" | bc --mathlib | tr -d '\\\n')";
	#                       └─ default (when `--mathlib` is used) is 20
	#
	if [[ "$result" == *.* ]]; then
		# improve the output for decimal numbers
		printf "$result" |
		sed -e 's/^\./0./'        # add "0" for cases like ".5"` \
		    -e 's/^-\./-0./'      # add "0" for cases like "-.5"`\
		    -e 's/0*$//;s/\.$//';  # remove trailing zeros
	else
		printf "$result";
	fi;
	printf "\n";
}

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

# Change working directory to the top-most Finder window location
function cdf() { # short for `cdfinder`
	cd "$(osascript -e 'tell app "Finder" to POSIX path of (insertion location as alias)')";
}

# Create a .tar.gz archive, using `zopfli`, `pigz` or `gzip` for compression
function targz() {
	local tmpFile="${@%/}.tar";
	tar -cvf "${tmpFile}" --exclude=".DS_Store" "${@}" || return 1;

	size=$(
		stat -f"%z" "${tmpFile}" 2> /dev/null; # OS X `stat`
		stat -c"%s" "${tmpFile}" 2> /dev/null # GNU `stat`
	);

	local cmd="";
	if (( size < 52428800 )) && hash zopfli 2> /dev/null; then
		# the .tar file is smaller than 50 MB and Zopfli is available; use it
		cmd="zopfli";
	else
		if hash pigz 2> /dev/null; then
			cmd="pigz";
		else
			cmd="gzip";
		fi;
	fi;

	echo "Compressing .tar using \`${cmd}\`…";
	"${cmd}" -v "${tmpFile}" || return 1;
	[ -f "${tmpFile}" ] && rm "${tmpFile}";
	echo "${tmpFile}.gz created successfully.";
}

# Determine size of a file or total size of a directory
function fs() {
	if du -b /dev/null > /dev/null 2>&1; then
		local arg=-sbh;
	else
		local arg=-sh;
	fi
	if [[ -n "$@" ]]; then
		du $arg -- "$@";
	else
		du $arg .[^.]* *;
	fi;
}

# Use Git’s colored diff when available
hash git &>/dev/null;
if [ $? -eq 0 ]; then
	function diff() {
		git diff --no-index --color-words "$@";
	}
fi;

# Create a data URL from a file
function dataurl() {
	local mimeType=$(file -b --mime-type "$1");
	if [[ $mimeType == text/* ]]; then
		mimeType="${mimeType};charset=utf-8";
	fi
	echo "data:${mimeType};base64,$(openssl base64 -in "$1" | tr -d '\n')";
}

# Create a git.io short URL
function gitio() {
	if [ -z "${1}" -o -z "${2}" ]; then
		echo "Usage: \`gitio slug url\`";
		return 1;
	fi;
	curl -i http://git.io/ -F "url=${2}" -F "code=${1}";
}

# Start an HTTP server from a directory, optionally specifying the port
function server() {
	local port="${1:-8000}";
	sleep 1 && open "http://localhost:${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";
}

# Start a PHP server from a directory, optionally specifying the port
# (Requires PHP 5.4.0+.)
function phpserver() {
	local port="${1:-4000}";
	local ip=$(ipconfig getifaddr en1);
	sleep 1 && open "http://${ip}:${port}/" &
	php -S "${ip}:${port}";
}

# Compare original and gzipped file size
function gz() {
	local origsize=$(wc -c < "$1");
	local gzipsize=$(gzip -c "$1" | wc -c);
	local ratio=$(echo "$gzipsize * 100 / $origsize" | bc -l);
	printf "orig: %d bytes\n" "$origsize";
	printf "gzip: %d bytes (%2.2f%%)\n" "$gzipsize" "$ratio";
}

# Syntax-highlight JSON strings or files
# Usage: `json '{"foo":42}'` or `echo '{"foo":42}' | json`
function json() {
	if [ -t 0 ]; then # argument
		python -mjson.tool <<< "$*" | pygmentize -l javascript;
	else # pipe
		python -mjson.tool | pygmentize -l javascript;
	fi;
}

# Run `dig` and display the most useful info
function digga() {
	dig +nocmd "$1" any +multiline +noall +answer;
}

# UTF-8-encode a string of Unicode symbols
function escape() {
	printf "\\\x%s" $(printf "$@" | xxd -p -c1 -u);
	# print a newline unless we’re piping the output to another program
	if [ -t 1 ]; then
		echo ""; # newline
	fi;
}

# Decode \x{ABCD}-style Unicode escape sequences
function unidecode() {
	perl -e "binmode(STDOUT, ':utf8'); print \"$@\"";
	# print a newline unless we’re piping the output to another program
	if [ -t 1 ]; then
		echo ""; # newline
	fi;
}

# Get a character’s Unicode code point
function codepoint() {
	perl -e "use utf8; print sprintf('U+%04X', ord(\"$@\"))";
	# print a newline unless we’re piping the output to another program
	if [ -t 1 ]; then
		echo ""; # newline
	fi;
}

# Show all the names (CNs and SANs) listed in the SSL certificate
# for a given domain
function getcertnames() {
	if [ -z "${1}" ]; then
		echo "ERROR: No domain specified.";
		return 1;
	fi;

	local domain="${1}";
	echo "Testing ${domain}…";
	echo ""; # newline

	local tmp=$(echo -e "GET / HTTP/1.0\nEOT" \
		| openssl s_client -connect "${domain}:443" -servername "${domain}" 2>&1);

	if [[ "${tmp}" = *"-----BEGIN CERTIFICATE-----"* ]]; then
		local certText=$(echo "${tmp}" \
			| openssl x509 -text -certopt "no_aux, no_header, no_issuer, no_pubkey, \
			no_serial, no_sigdump, no_signame, no_validity, no_version");
		echo "Common Name:";
		echo ""; # newline
		echo "${certText}" | grep "Subject:" | sed -e "s/^.*CN=//" | sed -e "s/\/emailAddress=.*//";
		echo ""; # newline
		echo "Subject Alternative Name(s):";
		echo ""; # newline
		echo "${certText}" | grep -A 1 "Subject Alternative Name:" \
			| sed -e "2s/DNS://g" -e "s/ //g" | tr "," "\n" | tail -n +2;
		return 0;
	else
		echo "ERROR: Certificate not found.";
		return 1;
	fi;
}

# `tre` is a shorthand for `tree` with hidden files and color enabled, ignoring
# the `.git` directory, listing directories first. The output gets piped into
# `less` with options to preserve color and line numbers, unless the output is
# small enough for one screen.
function tre() {
	tree -aC -I '.git|node_modules|bower_components' --dirsfirst "$@" | less -FRNX;
}