Tree-sitter based syntax highlighting plugin for Textbringer.

• Accurate syntax parsing with Tree-sitter
• Properly highlights Terraform/HCL for, in, and function calls (which Rouge fails to recognize)
• Emacs-style feature-based level control
• Customizable node mappings

gem 'textbringer-tree-sitter'

The following parsers are automatically installed during gem install:

• ruby
• python
• javascript
• json
• bash

These are downloaded from Faveod/tree-sitter-parsers and placed in ~/.textbringer/parsers/{platform}/.

To skip automatic parser downloads (useful in offline or restricted environments), set the environment variable:

export TEXTBRINGER_TREE_SITTER_NO_DOWNLOAD=1
gem install textbringer-tree-sitter

When this variable is set:

• gem install will skip automatic parser downloads
• CLI commands (get, get-all) will refuse to download with an error message
• You can still manually place parsers in ~/.textbringer/parsers/{platform}/

Use the CLI tool to install additional parsers:

# List available parsers and their installation status
textbringer-tree-sitter list

# Install a specific parser (downloads prebuilt or builds from source)
# Also generates a node_map if one doesn't exist in the gem
textbringer-tree-sitter get hcl
textbringer-tree-sitter get markdown

# Install parser only, skip node_map generation
textbringer-tree-sitter get markdown --no-map

# Install all Faveod prebuilt parsers at once
textbringer-tree-sitter get-all

Parsers are stored in ~/.textbringer/parsers/{platform}/.

# Show parser directory
textbringer-tree-sitter path

Once a parser is installed and a node_map exists for the language, syntax highlighting is automatically enabled for the corresponding Mode (e.g., RubyMode, PythonMode, HCLMode).

The get command:

1. Downloads or builds the parser
2. Automatically generates a node_map if one doesn't exist in the gem
3. Places the node_map in ~/.textbringer/tree_sitter/node_maps/

For custom Modes, call use_tree_sitter:

class MyMode < ProgrammingMode
  extend Textbringer::TreeSitterAdapter::ClassMethods
  use_tree_sitter :ruby
end

You can disable Tree-sitter highlighting for specific modes:

# Disable for RubyMode (falls back to default Textbringer highlighting)
RubyMode.tree_sitter_enabled = false

# Re-enable when needed
RubyMode.tree_sitter_enabled = true

You can add languages not included in the gem by creating a configuration file.

textbringer-tree-sitter init

This creates ~/.textbringer/tree_sitter/languages.yml.

# Simple format (minimal config)
elixir:
  repo: elixir-lang/tree-sitter-elixir

# Detailed format (full control)
zig:
  repo: maxxnino/tree-sitter-zig
  branch: master
  commit: abc123  # Optional: pin to specific commit
  subdir: ""      # Optional: subdirectory within repo
  build_cmd: "cc -shared -fPIC -O2 -I{src}/src {src}/src/parser.c -o {output}"

# Use a fork instead of curated version
ruby:
  repo: my-username/tree-sitter-ruby
  branch: experimental

# Use Faveod prebuilt parser
groovy:
  source: faveod

textbringer-tree-sitter get elixir

The custom language will override any curated language with the same name.

textbringer-tree-sitter list

This shows both curated (built-in) and user-defined languages.

# ~/.textbringer.rb

# Level 1: comment, string only
# Level 2: + keyword, type, constant
# Level 3: + function_name, variable, number (default)
# Level 4: + operator, punctuation, builtin

CONFIG[:tree_sitter_highlight_level] = 4

CONFIG[:tree_sitter_enabled_features] = [:comment, :string, :keyword]

Textbringer::TreeSitter::NodeMaps.register(:ruby, {
  my_custom_node: :keyword
})

CONFIG[:tree_sitter_parser_dir] = "/path/to/your/parsers"

These parsers are available from Faveod and include node_maps in the gem:

These parsers require building from source but include node_maps:

These parsers require building from source and node_map generation:

To regenerate a node_map manually:

textbringer-tree-sitter generate-map <language>

WTFPL - See LICENSE for details.

See DISCLAIMER for details.