Use findent as a pre-commit hook.

pre-commit, and:

• The wfindent-conda and findent-conda hooks require conda available on PATH (or mamba, with PRE_COMMIT_USE_MAMBA=1).
• The wfindent-system hook requires wfindent available on PATH.
• The findent-system hook requires findent available on PATH.

Add one of the hooks defined in .pre-commit-hooks.yaml to your .pre-commit-config.yaml file.

For example:

repos:
  - repo: https://github.com/zmoon/findent-pre-commit
    rev: main
    hooks:
      - id: wfindent-system

To control which files get formatted, set

        files: <regex>

to match them. The current setting (\.[fF](90|95|03|08)$) matches free-form sources files according to GCC.

To pass args to findent, use, for example:

        args: [--indent=4, -r0]

There are multiple ways to achieve this:

• for findent-system, use the --findent-version-pin arg, which will check the version before running

          args: [--findent-version-pin=4.3.3]

• for findent-pypi/wfindent-pypi, pin findent in additional_dependencies

          additional_dependencies: [findent==4.3.1]

  • findent-pypi releases can be found on GitHub
  • releases since 4.2.6.post0 should work for Windows (in addition to Unix-like)

• for findent-conda/wfindent-conda, pin findent in additional_dependencies

          additional_dependencies: [findent==4.3.2]

  • available versions can be found on conda-forge

• for wfindent-system, there is currently no way to ensure a certain findent version is being used

To install the Python wrapper findent-wrapper with pipx:

pipx install https://github.com/zmoon/findent-pre-commit/archive/main.zip

Note that the wfindent tool distributed with findent and referenced above provides in-place editing using shell scripting. findent-wrapper adds a --diff option (and maybe more options in the future...).

As an alternative to the wfindent-system hook defined in this repo, it is possible to use a local hook setup.

# .pre-commit-config.yaml

- repo: local
  hooks:
    - id: wfindent
      name: Format Fortran code using findent
      entry: wfindent
      description: Uses system copy of wfindent available on PATH.
      language: system
      pass_filenames: true
      files: \.[fF](90|95|03|08)$
      types: [text]
      require_serial: true

Note that findent cannot be used in this way, since it only reads from STDIN.