sed-language-server

A Language Server Protocol implementation for POSIX and GNU sed, with explicit BRE and ERE support.

Installation

Requires Node.js 22 or later.

npm install --global @inknexlab/sed-language-server

Features

• Diagnostics
• Document formatting
• Find references
• Go to definition
• Rename labels

Configuration

Pass dialect and regex as LSP initialization options:

dialect	regex	Syntax
"posix"	"bre"	POSIX sed with basic regular expressions
"posix"	"ere"	POSIX sed with extended regular expressions
"gnu"	"bre"	GNU sed with basic regular expressions
"gnu"	"ere"	GNU sed with extended regular expressions

The defaults are "posix" and "bre". The selection remains fixed for the server process.

Editor setup

Configure the LSP client to run sed-language-server --stdio for the sed language ID or filetype.

Emacs

(require 'eglot)

(add-to-list 'eglot-server-programs
             '((sed-ts-mode sed-mode) .
               ("sed-language-server" "--stdio"
                :initializationOptions (:dialect "posix" :regex "bre"))))

Run M-x eglot in a sed-ts-mode or sed-mode buffer.

Neovim

vim.lsp.config("sed_language_server", {
  cmd = { "sed-language-server", "--stdio" },
  filetypes = { "sed" },
  init_options = { dialect = "posix", regex = "bre" },
})

vim.lsp.enable("sed_language_server")

Parser

Parsing is powered by the tree-sitter-sed grammars.

License

MIT