Conhead

Consistent header management.

CLI tool for applying and maintaining consistent headers across source files.

• Add headers to files that don't have them.
• Update fields in files that already have them.
• Maintain different header configurations for different file types

Installation

Conhead is available as the Python conhead package.

For example, to install using pipx:

$ pipx install conhead
$ conhead --help
Usage: conhead [OPTIONS] SRC

Configuration

Configure conhead via pyproject.toml. Each header template is configured via a separate [tools.conhead.header.<name>] section. Each section is a header definition and can be applied to one or more file extensions.

Example:

[tools.conhead.header.hashhead]
extensions = ['py', 'toml', 'yaml']
template = """
    # Copyright {{YEARS}} Organized Organization
    # SPDX-License-Identifier: Apache-2.0

"""

[tools.conhead.header.slashhead]
extensions = ['c', 'cpp', 'java']
template = """
    // Copyright {{YEARS}} Organized Organization
    // SPDX-License-Identifier: Apache-2.0

"""

Template Definition

A few things to note about the template definition.

Each TOML tools.conhead.header section has a few options:

• extensions: A list of extensions that the header definition applies to.
• template: The header template for this header definition. This is the text that is applied to files that have the indicated extensions.

Header Templates

Notice a few things about the header template.

• The text of the template is indented for better readability withing the pyproject.toml configuration file, however conhead de-indents this text for you.
• The template contains a field that is kept up to date in the target source file. In this case the {{YEARS}} field writes the current year into every new template. If a file already contains a header with the year in it, and the year is different from the current year, it is updated to show a range of years. For example, a new template would have the {{YEARS}} field replaced with 2020 if it was first written in 2020. When the header is then updated in 2022, this field is rewritten as 2020-2022.
• If you need to write some text that contains certain characters used to describe fields, you must escape them. Examples are \{, \} and \\. These characters will appear in the rendered header without the preceding slash.

Usage

Let's say there is a python file without a header at hello.py:

def hello():
    print("Greetings!")

You can apply the hashhead header template defined in pyproject.toml and view the results by:

$ conhead hello.py
WARNING: missing header: hello.py

$ cat hello.py
# Copyright 2022 Organized Organization
# SPDX-License-Identifier: Apache-2.0


def hello():
    print("Greetings!")

conhead will recognize the header if you apply it to hello.py again and will not write a second header.

$ conhead hello.py

$ cat hello.py
# Copyright 2022 Organized Organization
# SPDX-License-Identifier: Apache-2.0


def hello():
    print("Greetings!")

Pre-commit

conhead is pre-commit ready. To use with pre-commit, add the repo to your .pre-commit-config.yaml.

For example:

- repo: https://github.com/slobberchops/conhead
  rev: v0.4.0
  hooks:

    - id: conhead

Links

• Changes: https://github.com/slobberchops/conhead/blob/main/CHANGES.rst
• PyPI Releases: https://pypi.org/project/conhead/
• Source Code: https://github.com/slobberchops/conhead
• Issue Tracker: https://github.com/slobberchops/conhead/issues