This extension aims to implement a complete language service for the Apache Velocity template language.

This Language Server works with .vm or .vt extension files. It has the following language features:

• Syntax and Semantic highlighting
• Completions for variables, directives and methods
• Code folding
• Parsing diagnostics
• Snippets

• Fixes grammar to allow empty dictionary literal
• Improves diagnostic errors for closing blocks like loops and ifs
• Removes allowing else attached to foreach directive, since there was no velocity reference found for it

In the future hopefully some, or all, of these limitations will be addressed:

• Only single files are supported now. Workspace scanning or global symbols are not available.
• Only syntax error checking is available. No semantic checks are implemented yet.
• Velocity does not type its variables, making method inference hard. Method autocomplete currently uses a global list of symbols.

The syntax highlighting was based on the grammar from project sodatea/vscode-velocity. It was translated to a tmGrammar.json format and indented to facilitate readability. A few bugs were fixed and a few simplifications were made.

Project structure followed the microsoft sample for the language server extension.

Parsing was implemented in Antlr4, using the antlr4ts target for Typescript.

This project is provided under the MIT license. Please see license file for more details.

Copyright 2020 Quidgest