optimize-openwrt.sh

gistfile1.txt

#!/bin/bash

dl_and_install_build_prereq() {
	# Prerequisites: https://openwrt.org/docs/guide-developer/quickstart-build-images
	# Download and install prerequisites for compiling firmware
	sudo apt-get -y update && sudo apt-get -y upgrade

	sudo apt -y install subversion g++ zlib1g-dev build-essential git python time
	sudo apt -y install libncurses5-dev gawk gettext unzip file libssl-dev wget
	sudo apt -y install libelf-dev ecj fastjar java-propose-classpath
}

generate_buildenv() {
	# Prepare build enviroment
	wget -qO openwrt.tar.gz https://github.com/openwrt/openwrt/archive/v18.06.4.tar.gz
	tar -xvzf openwrt.tar.gz
	mv openwrt-* openwrt
	rm -f openwrt.tar.gz
}

dl_and_install_feeds() {
	# Download and install package feeds
	./scripts/feeds update -a
	./scripts/feeds install -a
	rm -f .config .config.old
}

minify_feeds() {
	# Download and install prerequisites for minification
	dl_and_install_prereq() {
		sudo apt-get -y update && sudo apt-get -y upgrade
		sudo apt-get -y install nodejs npm lua5.2 # Required for luamin

		sudo npm install csso-cli -g
		sudo npm install uglify-js -g
		sudo npm install html-minifier -g

		git clone https://github.com/stravant/LuaMinify.git luamin
		mv luamin/* ./
		rm -rf luamin
	}

	minify(){
		# luapak file directory
		LUA_MINIFIER="lua ./CommandLineMinify.lua"

		# if you want to enable it for specific directory set it here
		CURRENT_DIR="./feeds"

		# First argument must be css, js, lua, htm, html, svg
		TYPE=$1

		# Status messages
		ERROR_DISPLAY="\t\033[31;40m\033[1m[error]\033[0m"
		OK_DISPLAY="\t\033[1;32;40m\033[1m[ok]\033[0m"

		[ -z $TYPE ] && \
			echo -e "First argument missing, it should be css, js, or html. $ERROR_DISPLAY" && \
			exit 0

		[ $TYPE != 'js' ] && [ $TYPE != 'css' ] && [ $TYPE != 'lua' ] && [[ ! $TYPE =~ htm? ]] && [ $TYPE != 'svg' ] && \
			echo -e "First argument must be css, js, or lua. $ERROR_DISPLAY" && \
			exit 0

		echo -e "Minifying all $TYPE files recursively in $CURRENT_DIR $OK_DISPLAY"

		for file in `find $CURRENT_DIR -name "*.$TYPE"`
		do   
			# Get the current file directory
			FILE_DIRECTORY=$(dirname $file)
			# Get the basename of the current directory
			BASE_DIR_NAME=`basename $FILE_DIRECTORY`

			# Get the current file name
			BASE_FILE_NAME=`basename $file`
			MINIFIED_FILE_NAME=$BASE_FILE_NAME
			# Minified directory path for the current file
			MINIFIED_FILE_DIRECTORY="$FILE_DIRECTORY/"
			MINIFIED_OUTPUT_FILE="$MINIFIED_FILE_DIRECTORY/$MINIFIED_FILE_NAME"

			#echo -e "Compressing $file $OK_DISPLAY"
			[ $TYPE == 'css' ] && \
				csso $file --comments none -o $MINIFIED_OUTPUT_FILE && \
				echo -e "Compressing $file $OK_DISPLAY"

			[ $TYPE == 'js' ] && \
				uglifyjs -o $MINIFIED_OUTPUT_FILE $file && \
				echo -e "Compressing $file $OK_DISPLAY"

			[ $TYPE == 'lua' ] && \
				$LUA_MINIFIER $MINIFIED_OUTPUT_FILE $file && \
				echo -e "Compressing $file $OK_DISPLAY"

			[[ $TYPE =~ htm? || $TYPE == 'svg' ]] && \
				html-minifier --remove-comments --minify-css true --minify-js true $file -o $MINIFIED_OUTPUT_FILE && \
				echo -e "Compressing $file $OK_DISPLAY"
		done
	}

	dl_and_install_prereq

	# YUICompressor does not minify all files; csso and uglify work better!
	minify css
	minify js

	# HTML minification. Remove comments only! Any other setting breaks LuCI GUI. 
	#minify htm
	minify html
	minify svg

	# LuaPak breaks LuCI; LuaMinify works better!
	minify lua
}


dl_and_install_build_prereq
generate_buildenv
cd openwrt

dl_and_install_feeds
minify_feeds