"""Use MultiEvaluator to run multiple evaluators on the same parser."""

from sybil import Example, Sybil
from sybil.evaluators.python import PythonEvaluator
from sybil.parsers.rest.codeblock import CodeBlockParser
from sybil.typing import Evaluator

from sybil_extras.evaluators.multi import MultiEvaluator


def _evaluator_1(example: Example) -> None:
    """Check that the example is long enough."""
    minimum_length = 50
    assert len(example.parsed) >= minimum_length


evaluators: list[Evaluator] = [_evaluator_1, PythonEvaluator()]
multi_evaluator = MultiEvaluator(evaluators=evaluators)
parser = CodeBlockParser(language="python", evaluator=multi_evaluator)
sybil = Sybil(parsers=[parser])

pytest_collect_file = sybil.pytest()

ShellCommandEvaluator ^^^^^^^^^^^^^^^^^^^^^

.. code-block:: python

"""Use ShellCommandEvaluator to run shell commands against the code block."""

import sys

from sybil import Sybil
from sybil.parsers.rest.codeblock import CodeBlockParser

from sybil_extras.evaluators.shell_evaluator import ShellCommandEvaluator

evaluator = ShellCommandEvaluator(
    args=[sys.executable, "-m", "mypy"],
    # The code block is written to a temporary file
    # with these suffixes.
    tempfile_suffixes=[".example", ".py"],
    # Pad the temporary file with newlines so that the
    # line numbers in the error messages match the
    # line numbers in the source document.
    pad_file=True,
    # Don't write any changes back to the source document.
    # This option is useful when running a linter or formatter
    # which modifies the code.
    write_to_file=False,
    # Use a pseudo-terminal for running commands.
    # This can be useful e.g. to get color output, but can also break
    # in some environments.
    use_pty=True,
)
parser = CodeBlockParser(language="python", evaluator=evaluator)
sybil = Sybil(parsers=[parser])

pytest_collect_file = sybil.pytest()

NoOpEvaluator ^^^^^^^^^^^^^

The NoOpEvaluator is an evaluator which does nothing. It is useful for testing and debugging parsers.

.. code-block:: python

"""Use NoOpEvaluator to do nothing."""

from sybil import Sybil
from sybil.parsers.rest.codeblock import CodeBlockParser

from sybil_extras.evaluators.no_op import NoOpEvaluator

parser = CodeBlockParser(language="python", evaluator=NoOpEvaluator())
sybil = Sybil(parsers=[parser])

pytest_collect_file = sybil.pytest()

Parsers

CustomDirectiveSkipParser ^^^^^^^^^^^^^^^^^^^^^^^^^

.. code-block:: python

"""Use CustomDirectiveSkipParser to skip code blocks with a custom marker."""

from sybil import Sybil
from sybil.parsers.rest.codeblock import PythonCodeBlockParser

# Similar parsers are available at
# sybil_extras.parsers.markdown.custom_directive_skip and
# sybil_extras.parsers.myst.custom_directive_skip.
from sybil_extras.parsers.rest.custom_directive_skip import (
    CustomDirectiveSkipParser,
)

skip_parser = CustomDirectiveSkipParser(directive="custom-marker-skip")
code_block_parser = PythonCodeBlockParser()

sybil = Sybil(parsers=[skip_parser, code_block_parser])

pytest_collect_file = sybil.pytest()

This allows you to skip code blocks in the same way as described in the Sybil documentation for skipping examples in reStructuredText <https://sybil.readthedocs.io/en/latest/rest.html#skipping-examples>, Markdown <https://sybil.readthedocs.io/en/latest/rest.html#skipping-examples> , and MyST <https://sybil.readthedocs.io/en/latest/myst.html#skipping-examples>_ files, but with custom text, e.g. custom-marker-skip replacing the word skip.

GroupedSourceParser ^^^^^^^^^^^^^^^^^^^

.. code-block:: python

"""Use GroupedSourceParser to group code blocks by a custom directive."""

import sys
from pathlib import Path

from sybil import Sybil
from sybil.example import Example
from sybil.parsers.rest.codeblock import PythonCodeBlockParser

# Similar parsers are available at
# sybil_extras.parsers.markdown.grouped_source and
# sybil_extras.parsers.myst.grouped_source.
from sybil_extras.parsers.rest.grouped_source import GroupedSourceParser


def evaluator(example: Example) -> None:
    """Evaluate the code block by printing it."""
    sys.stdout.write(example.parsed)


group_parser = GroupedSourceParser(
    directive="group",
    evaluator=evaluator,
    # Pad the groups with newlines so that the
    # line number differences between blocks in the output match the
    # line number differences in the source document.
    # This is useful for error messages that reference line numbers.
    # However, this is detrimental to commands that expect the file
    # to not have a bunch of newlines in it, such as formatters.
    pad_groups=True,
)
code_block_parser = PythonCodeBlockParser()

sybil = Sybil(parsers=[code_block_parser, group_parser])

document = sybil.parse(path=Path("CHANGELOG.rst"))

for item in document.examples():
    # One evaluate call will evaluate a code block with the contents of all
    # code blocks in the group.
    item.evaluate()

This makes Sybil act as though all of the code blocks within a group are a single code block, to be evaluated with the evaluator given to GroupedSourceParser.

Only code blocks parsed by another parser in the same Sybil instance will be grouped.

A group is defined by a pair of comments, group: start and group: end. The group: end example is expanded to include the contents of the code blocks in the group.

A reStructuredText example:

.. code-block:: rst

.. code-block:: python

  """Code block outside the group."""

  x = 1
  assert x == 1

.. group: start

.. code-block:: python

   """Define a function to use in the next code block."""

   import sys


   def hello() -> None:
       """Print a greeting."""
       sys.stdout.write("Hello, world!")


   hello()

.. code-block:: python

   """Run a function which is defined in the previous code block."""

   # We don't run ``hello()`` yet - ``doccmd`` does not support groups

.. group: end

SphinxJinja2Parser ^^^^^^^^^^^^^^^^^^

Use the SphinxJinja2Parser to parse sphinx-jinja2 <https://sphinx-jinja2.readthedocs.io/en/latest/>_ templates in Sphinx documentation.

This extracts the source, arguments and options from .. jinja:: directive blocks in reStructuredText documents or \`\`\`{jinja} blocks in MyST documents.

.. code-block:: python

"""Use SphinxJinja2Parser to extract Jinja templates."""

from pathlib import Path

from sybil import Sybil
from sybil.example import Example

# A similar parser is available at sybil_extras.parsers.myst.sphinx_jinja2.
# There is no Markdown parser as Sphinx is not used with Markdown without MyST.
from sybil_extras.parsers.rest.sphinx_jinja2 import SphinxJinja2Parser


def _evaluator(example: Example) -> None:
    """Check that the example is long enough."""
    minimum_length = 50
    assert len(example.parsed) >= minimum_length


parser = SphinxJinja2Parser(evaluator=_evaluator)
sybil = Sybil(parsers=[parser])
document = sybil.parse(path=Path("CHANGELOG.rst"))
for item in document.examples():
    item.evaluate()

.. |Build Status| image:: https://github.com/adamtheturtle/sybil-extras/actions/workflows/ci.yml/badge.svg?branch=main :target: https://github.com/adamtheturtle/sybil-extras/actions .. |codecov| image:: https://codecov.io/gh/adamtheturtle/sybil-extras/branch/main/graph/badge.svg :target: https://codecov.io/gh/adamtheturtle/sybil-extras .. |PyPI| image:: https://badge.fury.io/py/sybil-extras.svg :target: https://badge.fury.io/py/sybil-extras

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