pre-commit-images

Scripts that can work as git hooks to optimize and manipulate images. These scripts can be called directly or with the provided configration for the pre-commit framework. For details see below.

Using pre-commit-images with pre-commit

Add this to your .pre-commit-config.yaml:

    -   repo: https://github.com/boidolr/pre-commit-images
        rev: v1.8.3  # Use the ref you want to point at
        hooks:
        -   id: optimize-png
        # -   id: ...

For an extended example see .pre-commit-config.yaml.

Available hooks

• optimize-avif: Compress avif images.
  • --threshold can be used to configure which size difference should be used to keep the image.
  • --quality to configure minimum quality setting (best: 100, worst: 0).
  • --effort to set the quality/speed tradeoff (slowest: 0, fastest: 10).
• optimize-jpg: Compress jpeg images.
  • --threshold can be used to configure which size difference should be used to keep the image.
  • --quality can be used to configure quality setting for a JPG image.
• optimize-png: Compress png images.
  • --threshold can be used to configure which size difference should be used to keep the image.
• optimize-svg: Compress svg images.
  • --threshold can be used to configure which size difference should be used to keep the image.
• optimize-webp: Compress webp images.
  • --threshold can be used to configure which size difference should be used to keep the image.
  • --lossless switch to lossless compression.
  • --quality can be used to configure quality setting for lossy compression or effort to spend on lossless compression.
• resize (experimental): Resize avif, jpeg, png and webp images with fixed dimensions. Required options:
  • --width new width of images.
  • --height new height of images.

Using scripts directly

Install the package to get access to the scripts defined as command line entry points in pyproject.toml. The scripts accept the arguments given for the pre-commit hooks. Additionally they exepect to receive the file names to work on.

An example invocation could be uvx --from 'git+https://github.com/boidolr/pre-commit-images.git[avif]' optimize-avif tests/test.avif.

Available entry points are identical to the pre-commit hooks:

• optimize-avif
• optimize-jpg
• optimize-png
• optimize-svg
• optimize-webp
• resize

References

These hooks only work because of other projects:

• PIL
• pillow-avif-plugin
• scour