Bug#1112569: RFP: yaml-language-server -- Language Server for YAML files with jsonschema validation

[Niels Thykier <niels@thykier.net>]

Package: wnpp
Severity: wishlist
X-Debbugs-Cc: niels@thykier.net;debian-js@lists.debian.org

* Package name    : yaml-language-server
  Version         : 1.18.0
  Upstream Contact: Name <somebody@example.org>
* URL             : https://github.com/redhat-developer/yaml-language-server
* License         : MIT/X
  Programming Lang: node JS
  Description     : Language Server for YAML files with jsonschema 
validation

The yaml-language-server provides editor support for YAML files
via the Language Server Protocol (LSP). Beyond basic generic YAML
features, it can also use JSON schemas to enhances its support for
concrete YAML formats. For added user friendliness, it can
optionally fetch the schemas from schemastore.org



The language server is currently the default in many editors used in 
Debian such as emacs, vim, and kate (full list upstream knows about is 
at 
https://github.com/redhat-developer/yaml-language-server?tab=readme-ov-file#clients)

Due to the recently created debian-json-schemas project 
(https://salsa.debian.org/debian/debian-json-schemas), this language 
server will also provide domain specific editor support for 
`debian/upstream/metadata` (known field names, basic linting, and hover 
docs) once these editors have been taught that 
`debian/upstream/metadata` is a YAML file[1].

I ran `pkgjs-depends` on the mainline branch of upstream to gather an 
overview of the situation and it responded with the following output.

$ pkgjs-depends
# yaml-language-server@1.19.0
# 8 missing npm module(s)
DEPENDENCIES:
  node-ajv (ajv)
  node-lodash (lodash)
  node-vscode-languageserver (vscode-languageserver)
  node-vscode-languageserver-textdocument 
(vscode-languageserver-textdocument)
  node-vscode-languageserver-types (vscode-languageserver-types)
  node-yaml (yaml)

MISSING:
yaml-language-server@1.19.0
 └── @vscode/l10n (0.0.18)
 └── ajv-draft-04 (1.0.0)
 └── prettier (3.6.2)
 └── request-light (0.5.8)
 └── vscode-json-languageservice (4.1.8)
     └── jsonc-parser (3.3.1)
     └── vscode-nls (5.2.0)
     └── vscode-uri (3.1.0)
 └── (^) vscode-uri (3.1.0)

I have not dug further into this and Javascript packaging is not in my 
current skill set, so I am hoping an javascript skilled contributor will 
pick this one up to make Debian packaging more tool assisted.

Best regards,
Niels


[1]:
Kate: 
https://invent.kde.org/frameworks/syntax-highlighting/-/merge_requests/737
Emacs: #1112562
Vim: https://salsa.debian.org/vim-team/vim-debian/-/issues/7

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