tree-sitter-org

Unstable: This build will change.

Org grammar for tree-sitter. It is not meant to implement emacs' orgmode parser, but to implement a grammar that can usefully parse org files to be used in neovim and any library that uses tree-sitter parsers.

Overview

This section is meant to be a quick reference, not a thorough description. Refer to the tests in corpus for examples.

• Top level node: (document)
• Document contains: (directive)* (body)? (section)*
• Section contains: (headline) (plan)? (property_drawer)? (body)?
• headline contains: (stars, title, tag?+)
• body contains: (element)+
• element contains: (directive)* choose(paragraph, drawer, comment, footnote def, list, block, dynamic block, table)
• paragraph contains: (textelement)+
• text element: choose(unmarked text, markup text, timestamps, footnotes, links, latex fragments)

Like in many regex systems, */+ is read as "0/1 or more", and ? is 0 or 1.

Example

#+TITLE: Example

Some *marked up* words

* TODO Title
<2020-06-07 Sun>

  - list a
  - [ ] list a
    - [ ] list b
    - [ ] list b
  - list a

** Subsection :tag:

Text

Parses as:

(document [0, 0] - [16, 0]
  (directive [0, 0] - [0, 16]
    name: (name [0, 2] - [0, 7])
    value: (value [0, 9] - [0, 16]))
  (body [2, 0] - [2, 22]
    (paragraph [2, 0] - [2, 22]
      (bold [2, 5] - [2, 16])))
  (section [4, 1] - [16, 0]
    (headline [4, 1] - [4, 12]
      (stars [4, 1] - [4, 1])
      (item [4, 2] - [4, 12]))
    plan: (plan [5, 0] - [5, 16]
      (timestamp [5, 0] - [5, 16]
        (date [5, 1] - [5, 15])))
    (body [7, 0] - [11, 10]
      (list [7, 0] - [11, 10]
        (listitem [7, 3] - [7, 10])
        (listitem [8, 3] - [10, 16]
          (list [9, 0] - [10, 16]
            (listitem [9, 5] - [9, 16])
            (listitem [10, 5] - [10, 16])))
        (listitem [11, 3] - [11, 10])))
    (section [13, 2] - [16, 0]
      (headline [13, 2] - [13, 19]
        (stars [13, 2] - [13, 2])
        (item [13, 3] - [13, 13])
        tags: (tag [13, 15] - [13, 18]))
      (body [15, 0] - [15, 4]
        (paragraph [15, 0] - [15, 4])))))

Install

To compile the parser library for use in neovim & others:

gcc -o org.so -I./src src/parser.c src/scanner.cc -shared -Os -lstdc++

To build the parser using npm and run tests:

1. Install node.js as mentioned in the tree-sitter documentation
2. Clone this repository: git clone https://github.com/milisims/tree-sitter-org and cd into it
3. Install tree-sitter using npm: npm install tree-sitter-cli

TODO

• Use generic markup instead of types of markup For example: a b c should be (markup type: *), where type is a field, instead of (bold) . Allows users to more clearly use markup as they see fit.
• Fix textelements within list items
• Fix other tests -- mostly dynamic priority issues with paragraphs
• Add more fields where appropriate. Note: it's easy to query for a missing field