web/tools/js-compress.sh

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#!/bin/bash
#
# A development tool that use yuicompressor to compress JS files.
#
#
# Requirement:
# - wget
# - JRE
# - yuicompressor https://github.com/yui/yuicompressor
#
#
# Usage: bash /path/to/js-compress.sh
#
# Process:
# input: /path/to/js/source.js --> output: /path/to/js/dist/source.min.js
#
# v2.0
# https://github.com/cotes2020/jekyll-theme-chirpy
# © 2020 Cotes Chung
# MIT Licensed
set -eu
PROJ_HOME=$(dirname $(dirname $(realpath "$0")))
YUICOMPRESSOR_SRC=https://github.com/yui/yuicompressor/releases/download/v2.4.8/yuicompressor-2.4.8.jar
YUICOMPRESSOR=${PROJ_HOME}/tools/package/yuicompressor-2.4.8.jar
JS_ROOT=${PROJ_HOME}/assets/js/
JS_SRC=${JS_ROOT}_src # JS source files
JS_DEST=${JS_ROOT}dist # Compressed output directory
PREFIX_LEN=${#JS_ROOT} # To beautify the log
function init() {
if [[ ! -f $YUICOMPRESSOR ]]; then
if [[ ! -d "${PROJ_HOME}/tools/package/" ]]; then
mkdir -p "${PROJ_HOME}/tools/package/"
fi
wget "$YUICOMPRESSOR_SRC" -P "${PROJ_HOME}/tools/package/" -q
fi
}
function compress() {
# $1 is the source dir
# $2 is the destination dir
# $3 is the sub dir of source dir, nullable
if [[ -z ${3:+unset} ]]
then
sub_dir=""
else
sub_dir="$3/"
fi
for item in $(ls $1)
do
src="$1/$item"
if [[ -d "$src" ]]; then
compress $src $2 $item # recursion
else
if [[ -z $(git status $src -s) ]]; then
continue
fi
if [[ ! -d "$2/${sub_dir}" ]]; then
mkdir -p $2/${sub_dir}
fi
output=$2/${sub_dir}${item%.*}.min.js
echo "java -jar $(basename $YUICOMPRESSOR) ${src:$PREFIX_LEN} -o ${output:$PREFIX_LEN}"
java -jar $YUICOMPRESSOR $src -o $output
fi
done
sub_dir="" # clean up for next recursion.
}
init
compress $JS_SRC $JS_DEST