commercialhaskell/stack

Special case for dependency mismatch on wired-in packages

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#2,696 opened on 2016年10月10日

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awaiting pull requestcomponent: output (UI/UX)help wanted

説明

In https://github.com/commercialhaskell/stack/issues/2553 , there is the following output:

In the dependencies for haddock-issue-0.1.0.0:
    base must match >=4.7 && <5, but the stack configuration has no specified version (latest applicable is 4.9.0.0)

Recommended action: try adding the following to your extra-deps in /home/simon/tmp/haddock-issue/stack.yaml:
- base-4.9.0.0

For wired-in packages, it would be good to suggest changing ghc version. For base versions, we could even consider hardcoding an association between base versions and ghc versions. This way, a different selection of compiler can be suggested as a possible "Recommended action"

コントリビューターガイド

技術スタック
なし
領域
build system
Issue 種別
feature
難度新しい貢献者にとっての実装難度です。1 は非常に小さな変更、5 は専門的な作業です。
3
推定時間経験ある貢献者が調査、実装、テスト、pull request 準備にかけるおおよその時間範囲です。
half day
活動状況Issue が今どれだけ取り組みやすいかを示します。新しい、活発、古い、ブロック中、またはメンテナー入力待ちなどです。
stale
明確さ期待される変更、受け入れ条件、次の手順がどれだけ明確かを示します。
mostly clear
前提条件
Familiarity with Stack dependency resolution
初心者向け度初回貢献者にどれだけ取り組みやすいかを 1-100 で推定したスコアです。
40
調査方針
Investigate how Stack currently handles dependency mismatches for wired in packages like base. Look at the error output and the recommendation algorithm in the Stack codebase, likely in modules related to dependency solving or snapshot handling. Consider associating base versions with GHC versions to suggest a compiler upgrade instead of adding extra deps. The issue references #2553 for context; reviewing that issue and the linked code will help understand the current behavior.