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Rodney Lorrimar d7d24fde4b

mkStackPkgSet: filter out $locals package (#393 )

I found that if I added this to my stack.yaml:

    ghc-options:
      $locals: -ddump-to-file -ddump-hi

As specified in https://docs.haskellstack.org/en/stable/yaml_configuration/#ghc-options

Then my build would fail to evaluate with:

    error: The option `packages."\$locals".package.identifier.name' is used but not defined.

So to fix it, we filter out these special package globs in mkStackPkgSet.

This commit also adds a regression test for that configuration option.

2020-01-09 16:07:34 +10:00

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 resolver: lts-14.13
 packages:
 - .
 ghc-options:
   test-ghc-options: -DTEST_GHC_OPTION
   # See https://github.com/ndmitchell/weeder/issues/53
   $locals: -ddump-to-file -ddump-hi