[How to build sources to the production version?]

Thanks @andrewatfornax for response. If I correctly understood it's possible but still don't documentations correct?

[How to build sources to the production version?]

We have a ton of changes in the delivery prod/completed files (asyncspc.php, lg.php and etc), I decided to move changes to the source files, but  I can't find information for to build/complete source files to the production/server version. 

Can someone describe where I can find information or to do that? Thanks.