commercialhaskell/stack

Nix integration should use GC roots

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#3,479 创建于 2017年10月9日

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 (8 评论) (9 反应) (0 负责人)Haskell (4,060 star) (848 fork)batch import
component: nixhelp wanted

描述

Usual scenario:

  1. build stack project with Nix
  2. sometime later you run nix-store --gc or nix-collect-garbage
  3. you run into following error:
/home/user/.stack/setup-exe-cache/x86_64-linux-nix/Cabal-simple_mPHDZzAJ_1.24.2.0_ghc-8.0.2: streamingProcess: runInteractiveProcess: exec: does not exist (No such file or directory)

This means that nix libraries that the file was compiled with are missing from nix store.

Best way to prevent this is to create Nix GC roots. Also stack could double check that those libraries are still intact.

贡献者指南

技术栈
无
领域
build systemcli
议题类型
feature
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-2 days
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
clear
前置要求
Nix package managerHaskell build tool stack
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
20
研究方向
The issue requests creating Nix GC roots to prevent garbage collection from breaking built executables. Investigate how stack currently compiles with Nix and where to add root registration (likely in the Nix integration code). Check if any existing PRs or discussions address this. A concrete implementation would involve finding the Nix store paths used and registering them as GC roots, possibly using `nix store add root`. Also verify that stack can double check the integrity of those libraries.