[BUG?] Error: File name must end with '.lily'.

[nerfur]

Lily v2.3 (Mar 11 2026, 15:59:58)

$ > ./lily -t template.lily
Error: File name must end with '.lily'.

git clone repo && cmake . && cmake --build .

and started to follow tutorial...

[FascinatedBox]

Hi there! Apologies for not noticing this earlier: I use GitLab primarily now, and I accidentally didn't have GitHub emailing notifications. I've fixed that, so I should see these now.

I thought I removed documentation mentioning the -t template option. I've removed the option from the interpreter in the current release cycle (ending April 10). The interpreter's error message here isn't that helpful.

I'm going to sample what other interpreters do. It appears that a common behavior is seeing -(some single letter) as an option, and then reporting if that option is not supported. That would provide a vastly more useful message than what you've been presented with. It's confusing enough that I had to stare at it for a few minutes to understand what was happening.

I use GitLab as the primary issue tracking source. To avoid numerical confusion, I'm going to be opening a mirror issue there, pointing here. Once I fix that, I'll fix this too.

Thanks for reporting!