Factored out the db specific tests and kept the macros as placeholders.
Import everything in the cabal file for now.
Only using the flags to test that everything still works.
Given that CI only seems to test against GHC 7.10 & GHC 8.0 it's safe to say that only
`base >= 4.8` is officially supported. And empirically, GHC 7.8.4 runs into the compile error below
```
Configuring component lib from esqueleto-2.5.0...
Preprocessing library esqueleto-2.5.0...
[1 of 5] Compiling Database.Esqueleto.Internal.PersistentImport ( src/Database/Esqueleto/Internal/PersistentImport.hs, /tmp/matrix-worker/1485112890/dist-newstyle/build/x86_64-linux/ghc-7.8.4/esqueleto-2.5.0/build/Database/Esqueleto/Internal/PersistentImport.o )
src/Database/Esqueleto/Internal/PersistentImport.hs:7:1: Warning:
The import item ‘PersistQuery(..)’ suggests that
‘PersistQuery’ has (in-scope) constructors or class methods,
but it has none
[2 of 5] Compiling Database.Esqueleto.Internal.Language ( src/Database/Esqueleto/Internal/Language.hs, /tmp/matrix-worker/1485112890/dist-newstyle/build/x86_64-linux/ghc-7.8.4/esqueleto-2.5.0/build/Database/Esqueleto/Internal/Language.o )
src/Database/Esqueleto/Internal/Language.hs:55:1: Warning:
The qualified import of ‘Data.ByteString.Lazy’ is redundant
except perhaps to import instances from ‘Data.ByteString.Lazy’
To import instances alone, use: import Data.ByteString.Lazy()
[3 of 5] Compiling Database.Esqueleto.Internal.Sql ( src/Database/Esqueleto/Internal/Sql.hs, /tmp/matrix-worker/1485112890/dist-newstyle/build/x86_64-linux/ghc-7.8.4/esqueleto-2.5.0/build/Database/Esqueleto/Internal/Sql.o )
src/Database/Esqueleto/Internal/Sql.hs:761:32:
Could not deduce (Functor m1) arising from a use of ‘<$>’
from the context (SqlSelect a r, MonadIO m1, MonadIO m2)
bound by the type signature for
rawSelectSource :: (SqlSelect a r, MonadIO m1, MonadIO m2) =>
Mode -> SqlQuery a -> SqlReadT m1 (Acquire (C.Source m2 r))
at src/Database/Esqueleto/Internal/Sql.hs:(753,20)-(758,57)
or from (SqlBackendCanRead backend)
bound by the type signature for
rawSelectSource :: (SqlBackendCanRead backend) =>
Mode
-> SqlQuery a -> R.ReaderT backend m1 (Acquire (C.Source m2 r))
at src/Database/Esqueleto/Internal/Sql.hs:(759,1)-(778,35)
Possible fix:
add (Functor m1) to the context of
the type signature for
rawSelectSource :: (SqlBackendCanRead backend) =>
Mode
-> SqlQuery a -> R.ReaderT backend m1 (Acquire (C.Source m2 r))
or the type signature for
rawSelectSource :: (SqlSelect a r, MonadIO m1, MonadIO m2) =>
Mode -> SqlQuery a -> SqlReadT m1 (Acquire (C.Source m2 r))
In a stmt of a 'do' block: conn <- persistBackend <$> R.ask
In the expression:
do { conn <- persistBackend <$> R.ask;
res <- run conn;
return $ (C.$= massage) `fmap` res }
In an equation for ‘rawSelectSource’:
rawSelectSource mode query
= do { conn <- persistBackend <$> R.ask;
res <- run conn;
return $ (C.$= massage) `fmap` res }
where
run conn
= uncurry rawQueryRes
$ first builderToText
$ toRawSql mode (conn, initialIdentState) query
massage
= do { mrow <- C.await;
.... }
process = sqlSelectProcessRow
src/Database/Esqueleto/Internal/Sql.hs:882:26:
Could not deduce (Functor m) arising from a use of ‘<$>’
from the context (MonadIO m, SqlSelect a r, IsSqlBackend backend)
bound by the type signature for
rawEsqueleto :: (MonadIO m, SqlSelect a r, IsSqlBackend backend) =>
Mode -> SqlQuery a -> R.ReaderT backend m Int64
at src/Database/Esqueleto/Internal/Sql.hs:(877,17)-(880,39)
Possible fix:
add (Functor m) to the context of
the type signature for
rawEsqueleto :: (MonadIO m, SqlSelect a r, IsSqlBackend backend) =>
Mode -> SqlQuery a -> R.ReaderT backend m Int64
In a stmt of a 'do' block: conn <- persistBackend <$> R.ask
In the expression:
do { conn <- persistBackend <$> R.ask;
uncurry rawExecuteCount
$ first builderToText
$ toRawSql mode (conn, initialIdentState) query }
In an equation for ‘rawEsqueleto’:
rawEsqueleto mode query
= do { conn <- persistBackend <$> R.ask;
uncurry rawExecuteCount
$ first builderToText
$ toRawSql mode (conn, initialIdentState) query }
```
