fix(requirements-txt-fixer): keep --index-url before --extra-index-url #1241
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Fixes #612.
requirements-txt-fixersorts entries by name, which causes--extra-index-urlto be placed before--index-url. Pip processes these options in order, and this ordering can change behavior.This adds a small sort special-case so
--index-urlis always ordered before--extra-index-url, and includes a regression test.Test plan:
python -m pytest -q tests/requirements_txt_fixer_test.py