OS X script for resizing and uploading images

uploadimg.sh

#!/bin/sh
# A script for resizing images (using OS X's sips), uploading to a server
# and pasting HTML code to your (OS X) clipboard. 
# If you haven't guessed, it requires OS X.
# more info:
# http://jon.smajda.com/blog/2008/04/12/image-upload-script/

set -e
####### set all your variables
imagedir="/tmp"   # which local dir should images be saved to?
webhost="something.com" # domain/ip of your web server 
webuser="yourusername" # your username on your web server
uploadpath="/home/yourusername/public_html/wp-content/uploads" # upload path on server
uploadurl="http://something.com/wp-content/uploads"  # url to view your uploads at
maxwidth="500"  # in pixels, the widest image you want to allow.


###### show help if no arguments are given
if [ $# = 0 ]; then
    echo "This script will:"
    echo "   1. Download an image to work with (if you give it a url for an image),"
    echo "      or make a copy of a local image (if you give it a local image)."
    echo "      Images will be saved locally in $imagedir."
    echo "   2. Resize the image (if it's too big)." 
    echo "      The current default max width is $maxwidth""px." 
    echo "      Change this with '-w NUM'." 
    echo "   3. Upload it to your web server." 
    echo "   4. Copy the <img> code to your clipboard.";
    echo "Uses the 'sips' and 'pbcopy' commands in Mac OS X.";
    echo "Adjust the variables in lines 4-9 to fit your needs.";
    echo "Usage: `basename $0` [-w NUM] [imagefile]";
    exit;
fi

#### grab new maxwidth if -w flag is used
while [ "${1:0:1}" = "-" ]; do
        case "$1" in
            '-w')
               maxwidth=$2
               echo "Maximum width changed to $maxwidth"
            ;;
        esac
shift
shift
done

##### if the image is at a url, download the image to $imagedir, cd there and work from there
imagefile="$@"
if [ `echo "$imagefile" | grep ^"http"` ]; then
    imgurl="$imagefile"
    cd $imagedir
    echo "Remote image requested. Starting download..."
    curl -f -O $imgurl
    imagefile=`echo "$imgurl" | awk -F "/" '{print $NF}'`
    if [ `ls $imagefile` ]; then
        echo "Image downloaded to $imagedir/$imagefile:"
        echo "`ls -lh $imagedir/$imagefile`"
    fi
##### if the image is a local file, copy the image to $imagedir, cd there and work from there
else
    cp "$imagefile" "$imagedir"/
    echo "Image copied to "$imagedir"/"$imagefile":"
    cd "$imagedir"
    echo "`ls -lh "$imagedir"/"$imagefile"`"
fi

###### check the file exists and resize the image if necessary
if [ -f "$imagefile" ]; then
    imgwidth=`sips --getProperty pixelWidth "$imagefile" | awk '/pixelWidth/ {print $2}'`
    imgheight=`sips --getProperty pixelHeight "$imagefile" | awk '/pixelHeight/ {print $2}'`
    echo "Size of "$imagefile": $imgwidth""px wide by $imgheight""px tall.";
else
    echo "Oops, "$imagefile" does not exist." 
    exit
fi

if [ $imgwidth -gt $maxwidth ]; then
    echo " - Image too big. Resizing..."
    sips --resampleWidth $maxwidth "$imagefile" > /dev/null 2>&1  # to hide sips' ugly output 
    imgwidth=`sips --getProperty pixelWidth "$imagefile" | awk '/pixelWidth/ {print $2}'`
    imgheight=`sips --getProperty pixelHeight "$imagefile" | awk '/pixelHeight/ {print $2}'`
    echo " - Resized "$imagefile" to $imgwidth""px wide by $imgheight""px tall";
fi

###### ask to rename
echo "The file is named \"$imagefile\"."
echo " - To rename "$imagefile", type the new name now (including the extension)."
echo " - To keep the current name, just hit return.";
read newfilename
if [ -z "$newfilename" ]; then
    echo " - Ok, file is still named "$imagefile"."
else
    echo " - Ok, renaming image to "$newfilename"..."
    mv "$imagefile" "$newfilename";
    imagefile="$newfilename";
fi

####### send to the web server
echo "Sending to web server..."
scp "$imagefile" $webuser@$webhost:$uploadpath/

###### add the alt text & create the url
echo "Describe the image (for ALT and TITLE):"
read alttext
while [ -z "$alttext" ] 
do 
    echo "You really should have alt text. Try again:";
    read "alttext"
done
imgurl="<img src=\"$uploadurl/"$imagefile"\" height=\"$imgheight""px\" width=\"$imgwidth""px\" alt=\"$alttext\" title=\"$alttext\" />"

###### copy to the clipboard
echo -n $imgurl | pbcopy
echo "<img> code has been copied to your clipboard.";