Source files for Minecraft 1.12.2, since it's rather hard to find.
These source files were generated via MCP, for your usage. I've set up this old MCP940 for 1.12 to work with 1.12.2. I zipped and committed the decompiled source files if you want to view them.
In temp you'll find the assets and a few various other files. And in src you'll find the unobfuscated source files. As of edc8826, the source files are available under their folders, and downloadable ZIPs.