Publish to PyPI as crucible-marketdata (the obvious name is taken)

[mspinola]

Adds tag-triggered PyPI publishing via Trusted Publishing, the same mechanism cotdata uses (its PR #94).

marketdata is not available

Checked before writing the workflow rather than discovering it at the first tag push:

GET https://pypi.org/pypi/marketdata/json  →  200
    name: marketData   version: 0.2.0
    author: Behnam Hajian
    last upload: 2020-04-19

An unrelated, abandoned project — two releases, nothing since 2020. PyPI normalises marketData and marketdata to the same name, so that name is spoken for.

The import name does not change

pip install crucible-marketdata → import marketdata. Same split as python-dateutil → import dateutil, or scikit-learn → import sklearn.

Renaming the import package was the alternative, and it was rejected: cotmetrics and cot-analyzer were repointed onto import marketdata earlier today, and churning them again buys nothing that a distribution name does not.

crucible- rather than cot- is deliberate. ADR-0007 exists to establish that bars are not COT-specific. A distribution called cot-marketdata would undo in its name the distinction the split was made to draw. crucible-stack is where that ADR lives.

One guard beyond cotdata's workflow

Distribution and import names differing is exactly the setup where a packaging edit ships the wrong module tree: pip install succeeds, and the failure surfaces as ImportError at a consumer. So the build asserts the wheel actually contains a marketdata/ package before anything is published.

Verified locally — builds crucible_marketdata-0.1.0, twine check passes both artifacts, and the wheel's top level is marketdata.

Companion PRs — these are a set

A dependency names the distribution, so both consumers must follow. Left as marketdata>=0.1.0 they would either fail to resolve against the editable sibling or, worse, succeed by fetching a stranger's 2020 module.

• Depend on crucible-marketdata, the distribution name cotmetrics#12
• Depend on crucible-marketdata, and check its floor by that name cot-analyzer#28

Still required, and not doable from here

A PyPI Trusted Publisher for owner mspinola, repo marketdata, workflow release.yml, environment pypi. The publish step authenticates by OIDC and fails until that exists. Once it does: git tag v0.1.0 && git push origin v0.1.0.

A workflow_dispatch run builds and twine-checks without publishing, which is the only dry run available — worth doing first.

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