dotfiles/includes/bash_functions.bash

# Print cyan underlined header 
function header() {
	echo -e "$UNDERLINE$CYAN$1$NOCOLOR"
}

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

# Find shorthand
function f() {
	find . -name "$1"
}

# Get gzipped file size
function gz() {
	echo "Original size (bytes): "
	cat "$1" | wc -c
	echo "Gzipped size (bytes): "
	gzip -c "$1" | wc -c
}

# Test if HTTP compression (RFC 2616 + SDCH) is enabled for a given URL.
# Send a fake UA string for sites that sniff it instead of using the Accept-Encoding header. (Looking at you, ajax.googleapis.com!)
function httpcompression() {
	encoding="$(curl -LIs -H 'User-Agent: Mozilla/5 Gecko' -H 'Accept-Encoding: gzip,deflate,compress,sdch' "$1" | grep '^Content-Encoding:')" && echo "$1 is encoded using ${encoding#* }" || echo "$1 is not using any encoding"
}

# Escape UTF-8 characters into their 3-byte format
function escape() {
	printf "\\\x%s" $(printf "$@" | xxd -p -c1 -u)
	echo # newline
}

# Get a character’s Unicode code point: £ → \x00A3
function codepoint() {
	perl -e "use utf8; print sprintf('\x%04X', ord(\"$@\"))"
	echo # newline
}

# Extract archives of various types
function extract() {
	if [ -f $1 ] ; then
		local dir_name=${1%.*}  # Filename without extension
		case $1 in
			*.tar.bz2)  tar xjf           $1 ;;
			*.tar.gz)   tar xzf           $1 ;;
			*.tar.xz)   tar Jxvf          $1 ;;
			*.tar)      tar xf            $1 ;;
			*.tbz2)     tar xjf           $1 ;;
			*.tgz)      tar xzf           $1 ;;
			*.bz2)      bunzip2           $1 ;;
			*.rar)      unrar x           $1 $2 ;;
			*.gz)       gunzip            $1 ;;
			*.zip)      unzip -d$dir_name $1 ;;
			*.Z)        uncompress        $1 ;;
			*)          echo "'$1' cannot be extracted via extract()" ;;
		esac
	else
		echo "'$1' is not a valid file"
	fi
}

# Print nyan cat
# https://github.com/steckel/Git-Nyan-Graph/blob/master/nyan.sh
# If you want big animated version: `telnet miku.acm.uiuc.edu`
function nyan() {
	echo
	echo -en $RED'-_-_-_-_-_-_-_'
	echo -e $NOCOLOR$BOLD',------,'$NOCOLOR
	echo -en $YELLOW'_-_-_-_-_-_-_-'
	echo -en $GREEN'-_-_-_-_-_-_-'
	echo -e $NOCOLOR$BOLD'~|__( ^ .^)'$NOCOLOR
	echo -en $CYAN'-_-_-_-_-_-_-'
	echo
}

# Copy public SSH key to clipboard. Generate it if necessary
ssh-key() {
	file="$HOME/.ssh/id_rsa.pub"
	if [ ! -f "$file" ]; then
		ssh-keygen -t rsa
	fi
	
	cat "$file" | c
	echo "Your public key copied to clipboard."
}

# Create an SSH key and uploads it to the given host
# Based on https://gist.github.com/1761938
add-ssh-host() {
	username=$1
	hostname=$2
	identifier=$3

	if [[ "$identifier" == "" ]] || [[ "$username" == "" ]] || [[ "$hostname" == "" ]]; then
		echo "Usage: configure_ssh_host <username> <hostname> <identifier>"
	else
		if [ ! -f "$HOME/.ssh/$identifier.id_rsa" ]; then
			ssh-keygen -f ~/.ssh/$identifier.id_rsa -C "$USER $(date +'%Y/%m%/%d %H:%M:%S')"
		fi

		if ! grep -Fxiq "host $identifier" "$HOME/.ssh/config"; then
			echo -e "Host $identifier\n\tHostName $hostname\n\tUser $username\n\tIdentityFile ~/.ssh/$identifier.id_rsa" >> ~/.ssh/config
		fi

		ssh $identifier 'mkdir -p .ssh && cat >> ~/.ssh/authorized_keys' < ~/.ssh/$identifier.id_rsa.pub

		tput bold; ssh -o PasswordAuthentication=no $identifier true && { tput setaf 2; echo "SSH key added."; } || { tput setaf 1; echo "Failure"; }; tput sgr0

		_ssh_reload_autocomplete
	fi
}

# Upload current directory to special directory on my hosting
function yay() {
	server="locum"
	dir=`basename "$(pwd)"`
	remote="~/projects/yay/$dir"
	url="http://yay.sapegin.me/$dir/"

	tar cp --exclude '.git' --exclude 'node_modules' . | gzip | ssh $server "mkdir -p "$remote"; gzip -cd | tar x -C "$remote""

	echo "Current directory uploaded to $url."
	if command -v pbcopy >/dev/null 2>&1; then
		echo -n "$url" | pbcopy
		echo "URL copied to clipboard."
	fi
}

# Setup syncronization of current Git repo with GitHub repo of the same name
# USAGE: git-github [repo]
function git-github() {
	user="sapegin"
	repo=${1-`basename "$(pwd)"`}
	git remote add origin "git@github.com:$user/$repo.git"
	git push -u origin master
}

# Setup syncronization of current Git repo with Bitbucket repo of the same name
# USAGE: git-bitbucket [repo]
function git-bitbucket() {
	user="sapegin"
	repo=${1-`basename "$(pwd)"`}
	git remote add origin "git@bitbucket.org:$user/$repo.git"
	git push -u origin master
}

# Add remote upstream
# USAGE: git-fork <original-author>
function git-fork() {
	user=$1
	if [[ "$user" == "" ]]; then
		echo "Usage: git-fork <original-author>"
	else
		repo=`basename "$(pwd)"`
		git remote add upstream "git@github.com:$user/$repo.git"
	fi
}

# Sync branch with upstream
# USAGE: git-upstream [branch]
function git-upstream() {
	branch=${1-master}
	git fetch upstream
	git checkout $branch
	git merge upstream/$branch
}

# Find files with Windows line endings (and convert then to Unix in force mode)
# USAGE: crlf [--force]
function crlf() {
	[ "$1" == "--force" ] && force=1 || force=0
	for file in $(find . -type f -not -path "*/.git/*" -not -path "*/node_modules/*" | xargs file | grep ASCII | cut -d: -f1); do
		grep -q $'\x0D' "$file" && echo "$file" && [ $force ] && dos2unix "$file"
	done
}