pypa / pypa/setuptools

Isolate meta-path importer installation

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Dominant language
Python
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Avg merge
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Merged PRs (30d)
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Description

In this Mercurial issue, I captured an issue where when setuptools invokes the Mercurial build script, that build script installs a meta-path importer. Setuptools sandboxing technique should additionally remove any meta-path importers installed as part of the build process.

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reading setuptools' sandboxing implementation and Python's meta-path importer behavior, then use the linked Mercurial issue as the reproduction context. Done means the sandbox removes meta-path importers installed during a build without disturbing pre-existing importers, with regression coverage for that scenario.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
build-system
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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