I use Chrome OS for a lot of my programming (oddly enough, but I do), and I wanted to access the Chromium OS source code because I like Chrome OS, and I want to see the insides of how it works. Only problem is, I can't access the CLI to do all the checkout stuff, even though I can enable a Debian VM (I don't want to, because I use it for everything, so I don't want to mess it up), but I can extract a .zip or .tar.* file through a Chrome extension. So basically, I want to know how (and if) to access an archive file of the Chromium OS source.
Sorry, but there is no single archive provided for all of the Chromium OS source. A single checkout is made up of 100's of independent git repositories listed here: https://chromium.googlesource.com/chromiumos/manifest/+/HEAD/full.xml
If you want a checkout, you'll need to follow the documentation: https://chromium.googlesource.com/chromiumos/docs/+/HEAD/developer_guide.md