who -u

Dan Čermák

What is a Language Server?

with a Language Server:

RPM Spec Files

• m4 inspired macro language
• no AST, processed & executed during build

Why?

• Editor plugins simplistic & inconsistent
• I want a real IDE for spec files

Building the LSP

• Build as part of Hackweek 23 by Matěj Cepl, Dan Čermák & Jehan Singh
• Python
• LSP: openlawlibrary/pygls
• RPM parsing: packit/specfile

Features

• autocompletion using your system macros + spec sections
• expand macros on hover
• jump to definition for macros
• breadcrumbs
• experimental container mode

Demo!

Jump to Definition

• specfile gives you origin of a macro
• use regex searches:
  • in spec
  • in %_rpmmacrosdir
  • use autogenerated Provides: rpm_macro($name)

Container Mode

• ship server in container images

Demo!

Challenges

• hidden global state
• in memory storage required
• parsing errors are un-recoverable
• editors are weird
• macros are OS dependent

Roadmap

• improve container mode
• investigate tree-sitter integration
• better parser
• integration with bash-lsp
• commands to build RPMs
• syntax highlighting
• better testing
• publish the VSCode extension
• your idea here!

💙 Thank you 💚

• Matěj Cepl
• Maxwell G
• Jakub Kadlčik
• Dmitri Popov
• Jehan Singh
• Danilo Spinella
• and all the testers

Links

github.com/dcermak/rpm-spec-language-server

dcermak.github.io/rpm-spec-language-server-presentation

Questions?

Answers!