The OP is a good intro to setting up emacs.
One other thing I would add is this. If you are getting some warning like “lsp is scanning 5000 files in current project…consider adding to ignore list”, try adding this to config.el:
(setq lsp-file-watch-ignored
'(".idea" ".ensime_cache" ".eunit" "node_modules"
".git" ".hg" ".fslckout" "_FOSSIL_"
".bzr" "_darcs" ".tox" ".svn" ".stack-work"
"build" "_build" "deps" "postgres-data")
)
That’s just some files/directories that LSP will now ignore.
Note that in doom emacs you can easily get to config.el with key command SPC f P (doom/open-private config). You could have found this key command using ALT+X and typing, e.g. “doom config”.
Once you’re up and running, there are some really really nice things you can do.
For example, in an elixir file you should be in elixir-mode and you can use this key command: SPC m t b to run all tests in project (it runs mix test).
This is pretty cool - it will run the tests in a “compilation window” which you can browse like a normal buffer. Press enter on any file:line_number stacktrace to jump to that part of the code.
One final thing - the main reason I still love emacs so much. Press SPC u. This is a special command called universal-argument. It lets you add arbitrary arguments after any command.
For example, if you do SPC u SPC m t b then it will bring up a prompt where you can enter extra args, e.g. “–failed --max-failures=1”. This will then run mix test --failed --max-failures=1.
You can re-run the previous test command with SPC m t r.
This can all be done headlessly, because emacs can run in the shell.
