Using pipx (recommended)

By using pipx you can install ddt with a specific python version that can still be run from anywhere on your system. First, find out the path to a python version that matches what is used by the DKIST processing workers. This may be your system-level python, but, more likely, it will be in some other virtual environment. I recommend creating an environment just to provide a correct python version for dkist-dev-tools.

For example, using conda:

conda create -y -n dkist-dev-tools python=3.13
conda activate dkist-dev-tools
pipx install dkist-dev-tools --python $(which python) --include-deps

After running this commands you should have access to the ddt command line function from any terminal and environment, not just the conda env you created. Neat!

NOTE: Since dkist-dev-tools v1.2.0 the –include-deps option is required to get a working installation when using pipx. Without it the necessary towncrier binary will not be made available for the changelog functionality.

Using base pip

Probably do this in a virtual environment that matches the python version used by the DKISTDC.

pip install dkist-dev-tools

Shell Completion

If you want shell completion then add the following to your shell rc file:

eval "$(_DDT_COMPLETE=bash_source ddt)"

eval "$(_DDT_COMPLETE=zsh_source ddt)"

Freeze Dependencies

ddt freeze [-d project_dir] [-c] [-t] VERSION

This command prepares for a new version of a project by freezing a complete set of dependencies under the “frozen” pip extra in pyproject.toml. This allows airflow workers (or human users) to install with pip install dkist-processing-INSTRUMENT[frozen] and always get the exact same environment for a given version.

There is no need to worry about your current python environment (besides the version); a fresh temporary environment is used to install the project and inspect the dependencies. This temporary environment is deleted when we’re done with it.

After this script is run the pyproject.toml file in the project_dir will be updated in two places:

• The project.optional-dependencies.frozen node will either be created or updated to show the full list of dependencies in the as-built environment.

• The tool.dkist-dev-tools node will be either created or updated to show when the command was run and with what version. This information is used to check the project prior to building a new release on Bitbucket.

If the -c option is passed then the above changes will be committed to git with the message “Freeze deps for {VERSION}”.

If the -t option is passed then the above changes will be committed AND that commit will be tagged with the given version. This option implies the -c option.

Render Changelog(s)

ddt changelog [-d project_dir] [-s] [-c] VERSION

This command uses towncrier to render an update to CHANGELOG from fragments in the changelog fragment directory. If science fragments also exist then the SCIENCE_CHANGELOG will also be updated.

By default a draft of the changes will be shown and the user asked to confirm that it looks correct. Passing the -s option skips this step.

If the -c option is passed then the above changes will be committed to git with the message “Render CHANGELOG[s] for {VERSION}”.

All changes will need to be manually committed.

Check Release Conditions

ddt check

This group of commands is used to check that the main commands were run properly for the current version about to be released.

ddt check freeze [-d project_dir]

ddt check changelog