PreprocessJS

(C) 2014 Bastiaan Welmers

Small utility to preprocess (javascript) source code.

Usage

Usage:

java PreprocessJS -i main.js -o main.out.js

or

java PreprocessJS < main.js > main.out.js

It will process the file main.js and output the result to main.out.js.

including

Lines in main.js like:

"include path/to/source.js";

will be processed, the line will be replaced by the contents of the file path/to/source.js.

Note that the path/to/source.js will again be processed in the same way.

reading into variables

Besides including files, also contents of files can be written staticly to variables. For example:

 var template;
 "read path/to/template.html into template";

will result in the contents of path/to/template.html be placed into the variable template.

Considering the contents of path/to/template.html is:

 <div>
    <p class="intro">Some text</p>
 </div>

The end result for this part will be:

 var template;
 template = "<div>\
    <p class=\"intro\">Some text</p>\
 </div>\
 ";

Include paths

The rule is that the path to the mentioned files is always relative to the source file that is processed. So with nested includes, the path for the child is always relative to the directory of the parent file.

Note: if you feed the main input file with stdin (using < or | with command line) instead of the -i option, then the current working directory will be used instead of some parent directory of the input file.