pypa/hatch

Add flag for fresh Environment

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#2,138 建立於 2025年12月9日

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 (3 留言) (0 反應) (0 負責人)Python (4,451 star) (240 fork)batch import
enhancementgood first issue

描述

Description

Currently, the environment is reused between runs. What I want is a flag that uses its own fresh environment for each specific run.

Use case/motivation

dev-mode = false installs the project as non-editable whl mode, so when you do update the project code, the environment doesn't pick it up, and we need to first hatch env remove [environment-name] then run the code. If we had a flag for fresh env, that would go well with dev-mode = false

Related issues

https://github.com/pypa/hatch/issues/2134#issuecomment-3622375564 Another way to approach this problem is by checking if the project whl needs to be reinstalled (uninstalled then installed) This requires

  1. Check the src dir for changes
  2. Check BuildHook for changes
  3. Check MetadataHook for changes If yes, reinstall!

This is actually more performant than having to recreate the whole environment. But I figure it'd be harder to implement.

Thus, a clean-env flag for now would do, as it only requires making a time-based hashed env for each session.

Are you willing to submit a PR?

  • Yes I am willing to submit a PR!

Code of Conduct

貢獻者指南

技術棧
python
領域
developer experiencetooling
議題類型
feature
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-2 days
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
fresh
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
Basic understanding of HatchPython environment management
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
50
研究方向
The issue asks for a flag (e.g., fresh) to create a fresh environment per run. The discussion in the related issue (https://github.com/pypa/hatch/issues/2134#issuecomment 3622375564) suggests an alternative: detecting changes to reinstall the wheel. For now, a simpler approach is to implement a time based hashed environment name. Key files to investigate: hatch/env/core.py or similar environment creation logic. The feature should be added as a CLI option and potentially a config setting.