Use GLSL-Unit to compile fragment shader - glsl

Question

I want to use GLSL-Unit to just minify a fragment shader. But if I do run this command:
sunbox$ glsl-compiler --input=/Users/sunbox/Sites/bessa-app/xyz.fshader
I'm getting these error messages:
/usr/local/bin/glsl-compiler: line 1: syntax error near unexpected token `b'
/usr/local/bin/glsl-compiler: line 1: `var COMPILED=true,goog=goog||{};goog.global=this;goog.DEBUG=true;goog.LOCALE="en";goog.provide=function(b){if(!COMPILED){if(goog.isProvided_(b))throw Error('Namespace "'+b+'" already declared.');delete goog.implicitNamespaces_[b];for(var f=b;f=f.substring(0,f.lastIndexOf("."));){if(goog.getObjectByName(f))break;goog.implicitNamespaces_[f]=true}}goog.exportPath_(b)};'
So, how do I simply minify a fragment shader?

Answer 1

I finally got it working. :D
For everyone who's interested, you need this file:
http://code.google.com/p/glsl-unit/source/browse/bin/template_glsl_compiler.js
... and NodeJS installed. Then add a simple comment in your shader file:
//! FRAGMENT
precision lowp float;
uniform sampler2D image;
varying vec2 src_position;
void main() {
gl_FragColor = texture2D(image, src_position);
}
... and annoyingly you have to use the .glsl file extension! :(
Now you can run this command:
sunbox$ node /Volumes/template_glsl_compiler.js --input=/Volumes/test.glsl --variable_renaming=INTERNAL --output=/Volumes/test.fshader.min
And that's it. Compiled output will be:
//! VERTEX
//! FRAGMENT
precision lowp float;uniform sampler2D image;varying vec2 a;void main(){gl_FragColor=texture2D(image,a);}
Really nice! :)