PGN grammar for tree-sitter

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Project description

tree-sitter-pgn

Overview

Chess Portable Game Notation (PGN) grammar for tree-sitter.

Used in

Emacs pygn-mode

Highlighting Example

Python Example

import more_itertools
from tree_sitter import Language, Parser
import tree_sitter_pgn as ts_pgn

PGN_LANGUAGE = Language(ts_pgn.language())
parser = Parser(PGN_LANGUAGE)

query = PGN_LANGUAGE.query(
    '''
    (series_of_games
      game: (game) @game)

    (movetext
      san_move: (san_move) @san_move)
    ''')

with open('input_file.pgn', 'rb') as file:
    content = b''.join(file.readlines())
    tree = parser.parse(content)

matches = query.captures(tree.root_node)

merged_nodes = [
    *matches.get('game', []),
    *matches.get('san_move', []),
]
merged_nodes = sorted(merged_nodes, key=lambda elt: elt.start_byte)

for game in more_itertools.split_before(merged_nodes, lambda node: node.type == 'game'):
    san = []
    for node in game:
        if node.type == 'san_move' and node.text is not None:
            san.append(node.text.decode().strip())
            continue
    print(' '.join(san))

References

Project details

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Release history Release notifications | RSS feed

1.1.4

Sep 19, 2024

1.1.3

Sep 17, 2024

1.1.1

Sep 17, 2024

1.1.0

Sep 14, 2024

1.0.16

Sep 7, 2024

1.0.14

Sep 7, 2024

This version

1.0.13

Sep 3, 2024

1.0.12

Sep 3, 2024

1.0.6 yanked

Sep 3, 2024

Reason this release was yanked:

version number incorrect

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