mclsp — McCode DSL Language Server
A Language Server Protocol
implementation for the McCode domain-specific languages: McStas (.instr, .comp)
and McXtrace (.instr, .comp).
Built on top of mccode-antlr and
pygls.
Features
| Feature | Status |
|---|---|
| Syntax error diagnostics | ✅ |
| Keyword completion | ✅ |
| Component name completion | ✅ |
Parameter completion inside Component(…) |
✅ |
| Hover: component signature & description | ✅ |
| Syntax highlighting (TextMate grammar) | ✅ |
| Go-to-definition of .comp files | ✅ |
Installation
pip install mclsp
# or
conda install -c conda-forge mclsp
Editor setup
VS Code
Install the McCode extension from the Marketplace (it bundles mclsp), or
point the generic LSP client extension at mclsp --stdio.
A minimal extension stub is provided in vscode-extension/.
Neovim (nvim-lspconfig)
require('lspconfig').mclsp.setup {}
A config will be submitted upstream to nvim-lspconfig once the server stabilises.
Helix
Add to ~/.config/helix/languages.toml:
[[language]]
name = "mccode"
scope = "source.mccode"
file-types = ["instr", "comp"]
language-servers = ["mclsp"]
[language-server.mclsp]
command = "mclsp"
args = ["--stdio"]
Running the server manually
mclsp --stdio # communicate over stdin/stdout (standard LSP mode)
mclsp --tcp 2087 # listen on TCP port 2087 (useful for debugging)
Development
git clone https://github.com/mcdotstar/mccode-language-server.git mclsp
cd mclsp
uv sync
uv run pytest
1 maintainer
Metadata
1 maintainer
Release files for mclsp 0.5.1
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | Provenance | |
|---|---|---|---|---|
| mclsp-0.5.1.tar.gz | 100.8 kB | With provenance | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| mclsp-0.5.1-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 133.6 kB
Release files / mclsp-0.5.1.tar.gz
| Download URL | mclsp-0.5.1.tar.gz |
|---|---|
| Size | 100.8 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
db317745e52a5eda501e1a6e1e104b83cfa4c5db1a5eafc9e3d8f2ceba01ca29
|
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BLAKE2b-256 checksum How to use checksums |
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Yes |
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twine/6.1.0 CPython/3.13.7
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Transparency logRelease files / mclsp-0.5.1-py3-none-any.whl
| Download URL | mclsp-0.5.1-py3-none-any.whl |
|---|---|
| Size | 32.8 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
649ca2afb725718f598c67c878bf8adbf053eadc1050cc19fea4665a3ea15d28
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BLAKE2b-256 checksum How to use checksums |
8b8b82dcc675fcbde661f22f2ed2ed44e7a3c8bf139ce9c71a09c36bfd7c4ccb
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Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/6.1.0 CPython/3.13.7
|
Provenance
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PyPI Publish Attestation
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Signed by GitHub Actions, verified by PyPI on Feb 25, 2026.
Transparency logSecurity for mclsp 0.5.1
Provenance
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Full provenance
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Attestation for mclsp-0.5.1.tar.gz
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PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Feb 25, 2026.
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