Backport 3.12: Show installed versions when configuring fails #10406
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When `act-as-setup configure` fails, it doesn't indicate which
dependencies are missing entirely and which ones don't satisfy the
version constraints. The errors from `cabal build` are more informative,
but aren't available in all contexts (nixpkgs Haskell builds, for
example, use the `act-as-setup` interface). This makes it immediately
clear what sort of dependency error has occurred.
Before (cabal-install 3.12.1.0):
Configuring test-pkg-0.1.0.0...
Error: [Cabal-8010]
Encountered missing or private dependencies:
base <=4.18,
foobar,
test-pkg:{bar-internal, foo-internal}
After:
Configuring test-pkg-0.1.0.0...
Error: [Cabal-8010]
Encountered missing or private dependencies:
base <=4.18 (installed: 4.19.1.0),
foobar (missing),
test-pkg:{bar-internal,foo-internal} (missing: :bar-internal)
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ffaf1
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Oct 1, 2024
| --- | ||
| synopsis: "Show why `cabal act-as-setup configure` failed" | ||
| packages: [Cabal] | ||
| prs: 10273 |
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Argh, I wonder whether the missing # will mess with changelog.d.
ffaf1
approved these changes
Oct 1, 2024
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Backport of #10273 for 3.12.
Include the following checklist in your PR: