Sass mixin to convert photoshop line-height to CSS, photoshop letter-spacing to CSS

photoshop-to-css.sass

/* Reset rem to 10-based instead of default browser 16 */
html {
	font-size: 62.5%;
}

/* 
  Photoshop does not apply line height to the first row, which CSS does. This creates all kinds of havock. 
  To calculate the correct offset for the first line we need the font-size and the lineheight, i.e:
  
  @include line-height(22,30);
  
  in Photoshop points/px (but with no unit)
*/
@mixin line-height($fontsize, $lineheight ){

    line-height: ($lineheight) + px;
    line-height: ($lineheight/10) + rem;

    margin-top: (($lineheight - $fontsize)/2 * -1) + px;
    margin-top: ((($lineheight - $fontsize)/2 * -1) / 10 ) + rem
}

/* Letter spacing is simpler.. stolen from somewhere */
@mixin letter-spacing($letterspacing) {
    letter-spacing: $letterspacing/1000;
}

/* font-size to rem with backup, stolen from somewhere */
@mixin font-size($sizeValue: 16) {
  font-size: ($sizeValue) + px;
  font-size: ($sizeValue/10) + rem;
}

Oh, Thank you

Could this be put into a repository and published as eyeglass module on npm?