I try C-g but that doesn't fix it either

does emacs still have focus?

I ask because some desktops like macos will focus newly launched apps, and it has been a long time since I've used macos but it would sometimes treat the jvm process as an app (even adding an icon for it to the dock) even if there was no gui window for it displayed, and if projectile-run-project starts a jvm maybe emacs isn't in focus anymore which would be why it doesn't respond to the keyboard

yea emacs still has focus. It responds to the keybaord

It regularly happens after specific commands that I run like that one

MacOS?

Yes

Do you perhaps have (menu-bar-mode -1) in your config?

MacOS doesn't like this

I am using Prelude, so I see that it has (menu-bar-mode -1) but that prelude-macos which I am presumably running flips that around (menu-bar-mode +1)

So M-: menu-bar-mode says t, right?

Not sure where to find that - M-: leads to eval on my machine. I ran toggle menu-bar-mode off and on though

Yeah, that's what I mean. If you eval menu-bar-mode, which is also a variable, it says whether it is enabled

Well, anyway, if you say that prelude-macos enables it back, then it's not it.

Yea it says t

Example of what it might look like

sounds reasonable to me. i just did exactly that with no issues

are your projects under a symlink'ed directory, I've had some issues where project mode decided would decide depending on if a file was created using the path through the symlink or not would lead to weird behavior

i’ve never seen emacs insist importing clojure/core.clj. and error buffers popping, can you say what errors they are reporting?

I probably should have noted them down, but I ended up force quitting emacs and trying again... This time it's OK

But something similar happened the time before too

It's not symlinked

what do you mean by emacs insisting you import clojure/core.clj?

are you running a repl with cider and are you using clojure-lsp?

The minibuffer pops up with a range of options including importing clojure/core.clj, and if I don't it just pops up again

Yes to both

so cider is generally dynamic information (it inspects what is in memory in a running process)

and clojure-lsp is generally static information (static analysis of the text in the files on disk)

what lsp client are you using?

Isn't Emacs the client in this architecture?

when you create a new file on disk and add an ns form, but haven't eval'ed it yet, there will be a discrepancy between the static and dynamic view (it exists on disk in a file, but doesn't exist in the repl) and I could in some hand wavy way see some cider plugin in or something not finding the namespace in the repl and some how deciding that means the namespace is missing a require of clojure.core (which, if you create a namespace using in-ns for example, it doesn't automatically have clojure.core required)

emacs is an editor for which multiple lsp clients exist

eglot is built into recent releases of emacs, but lsp-mode is I think more popular

I am using Prelude, which I think is LSP mode

the above being said, I don't think cider ever prompts to require a namespace, and cider being clojure specific is more likely to use the correct clojure terminology "require" the namespace "clojure.core", where lsp-mode is more generic and likely to say something like "import" the file "clojure/core.clj"

so I think it is most likely whatever is going on there is coming from lsp-mode and clojure-lsp

I use eglot (not lsp-mode) and don't use cider, when I open a new file in the project clojure-lsp sees it and asks eglot if it is ok to add the appropriate ns form to the file, and eglot pops up a "is it ok to edit this file?" in the mini buffer, and that is all that happens

How do you open a new file in the project?

Do you C-x b or do you touch it in a terminal?

C-x C-f

That's find file for me, so I think it needs to exist already?

C-x b might make a new buffer, which is not a file

find file will create a file if it doesn't exist

> (find-file FILENAME &optional WILDCARDS) > > Edit file FILENAME. > Switch to a buffer visiting file FILENAME, creating one if none > already exists.

a buffer in emacs is a view of some text, which may or may not be associated with the contents of a file

Thanks - this all is very new to me but I am determined to get good at it

Yep, that was your issue right there. When you C-x b a new buffer, Emacs/CIDER doesn't know you want it to be related to a REPL that's currently running (and which one?). When you create a file with C-x C-f in the directory of a project that has a REPL running, then it's inferred.

I used C-x C-f and it worked like a charm, thanks!