The ui package contains static files and templates used in the web UI. For easier distribution they are statically compiled into the Thanos binary using the go-bindata tool (c.f. Makefile).

During development it is more convenient to always use the files on disk to directly see changes without recompiling. Set the environment variable DEBUG=1 and compile Thanos for this to work. This is for development purposes only.

After making changes to any file, run make assets before committing to update the generated inline version of the file.