auto generate YAML front-matter for jekyll post, scrape a background image from bing and normalize it for post's header

newFille.sh

cover=`date --iso-8601=seconds | cut -d'+' -f1`.jpg

function getCover {
    ### get jpeg file from bing home page
    url="http://cn.bing.com"
    
    echo "Find header image..."
    wget -q $url -O index.html
#    jpgUrl=`cat index.html | grep background-image | awk -F\' '{print $2}'`
    jpgUrl=`cat index.html | tr ";" "\n" | grep -o "url:'http://.*[.]jpg"| cut -d\' -f2`
    echo "Start Fetch header image:" $jpgUrl
    wget -q $jpgUrl -O $cover
    echo "Fetch header image done."
    
    rm index.html
    
    ### normalize jpg for header
    convert $cover -resize 734x320^ -gravity center -extent 734x320 ../images/$cover
    rm $cover
    echo "normalize header image done."
}

function touchFile {
        touch $fn
        getCover
        echo '---' >>$fn
        echo 'title:' $title >> $fn
        echo 'tags:' $tags >> $fn
        echo 'cover:' $cover >> $fn
        echo 'layout: post' >> $fn
        echo '---' >> $fn
        echo file $fn touched.
}

echo "Now enter title:"
read title

echo "Now enter tags:"
read tags

fn=`date -I`-$title.md
if [ -f $fn ]; then
    echo file $fn exsits, remove it and recreate?[y/n]
    read ans
    if [ "$ans" = 'y' ]; then
        rm $fn
        oldCover=`grep cover: $fn | cut -d' ' -f2`
        rm ../images/$oldCover
        touchFile
    else
        echo please handle exist one:
    fi
else
    touchFile
fi

echo $fn
cat $fn