src/Network/Gitit/Feed.hs:152:12: error: Not in scope: data constructor ‘Both’

[glycerine]

newb here. I tried to install from cabal but no luck. Can anyone advise?

$ cabal update
Downloading the latest package list from hackage.haskell.org
$ cabal install gitit
Resolving dependencies...
Downloading Diff-0.4.0...
Downloading Glob-0.10.0...
Downloading HUnit-1.6.0.0...
Configuring Glob-0.10.0...
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Downloading gitit-0.12.3.2...
Configuring gitit-0.12.3.2...
Building gitit-0.12.3.2...
Failed to install gitit-0.12.3.2
Build log ( /Users/jaten/.cabal/logs/ghc-8.2.2/gitit-0.12.3.2-7CdLGb1nifvBwu0GL6wEtb.log ):
cabal: Entering directory '/var/folders/6s/zdc0hvvx7kqcglg5yqm3kl4r0000gn/T/cabal-tmp-69068/gitit-0.12.3.2'
Configuring gitit-0.12.3.2...
Preprocessing executable 'expireGititCache' for gitit-0.12.3.2..
Building executable 'expireGititCache' for gitit-0.12.3.2..
[1 of 1] Compiling Main             ( expireGititCache.hs, dist/build/expireGititCache/expireGititCache-tmp/Main.o )
Linking dist/build/expireGititCache/expireGititCache ...
Preprocessing library for gitit-0.12.3.2..
Building library for gitit-0.12.3.2..
[ 1 of 22] Compiling Network.Gitit.Compat.Except ( src/Network/Gitit/Compat/Except.hs, dist/build/Network/Gitit/Compat/Except.o )
[ 2 of 22] Compiling Network.Gitit.Rpxnow ( src/Network/Gitit/Rpxnow.hs, dist/build/Network/Gitit/Rpxnow.o )
[ 3 of 22] Compiling Network.Gitit.Server ( src/Network/Gitit/Server.hs, dist/build/Network/Gitit/Server.o )
[ 4 of 22] Compiling Network.Gitit.Types ( src/Network/Gitit/Types.hs, dist/build/Network/Gitit/Types.o )

src/Network/Gitit/Types.hs:336:1: warning: [-Worphans]
    Orphan instance: instance FromData SessionKey
    To avoid this
        move the instance declaration to the module of the class or of the type, or
        wrap the type with a newtype and declare the instance on the new type.
    |
336 | instance FromData SessionKey where
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^...

src/Network/Gitit/Types.hs:373:1: warning: [-Worphans]
    Orphan instance: instance FromReqURI [String]
    To avoid this
        move the instance declaration to the module of the class or of the type, or
        wrap the type with a newtype and declare the instance on the new type.
    |
373 | instance FromReqURI [String] where
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^...
[ 5 of 22] Compiling Network.Gitit.State ( src/Network/Gitit/State.hs, dist/build/Network/Gitit/State.o )
[ 6 of 22] Compiling Network.Gitit.Plugins ( src/Network/Gitit/Plugins.hs, dist/build/Network/Gitit/Plugins.o )

src/Network/Gitit/Plugins.hs:41:5: warning: [-Wdeprecations]
    In the use of ‘defaultCleanupHandler’ (imported from GHC):
    Deprecated: "Cleanup is now done by runGhc/runGhcT"
   |
41 |     defaultCleanupHandler dflags $ do
   |     ^^^^^^^^^^^^^^^^^^^^^
[ 7 of 22] Compiling Network.Gitit.Framework ( src/Network/Gitit/Framework.hs, dist/build/Network/Gitit/Framework.o )
[ 8 of 22] Compiling Network.Gitit.Cache ( src/Network/Gitit/Cache.hs, dist/build/Network/Gitit/Cache.o )
[ 9 of 22] Compiling Network.Gitit.Util ( src/Network/Gitit/Util.hs, dist/build/Network/Gitit/Util.o )
[10 of 22] Compiling Network.Gitit.Page ( src/Network/Gitit/Page.hs, dist/build/Network/Gitit/Page.o )
[11 of 22] Compiling Network.Gitit.Authentication.Github ( src/Network/Gitit/Authentication/Github.hs, dist/build/Network/Gitit/Authentication/Github.o )
[12 of 22] Compiling Paths_gitit      ( dist/build/autogen/Paths_gitit.hs, dist/build/Paths_gitit.o )
[13 of 22] Compiling Network.Gitit.Feed ( src/Network/Gitit/Feed.hs, dist/build/Network/Gitit/Feed.o )

src/Network/Gitit/Feed.hs:150:12: error:
    Not in scope: data constructor ‘First’
    Perhaps you want to add ‘First’ to the import list in the import of
    ‘Data.FileStore.Generic’ (src/Network/Gitit/Feed.hs:39:1-46).
    |
150 | diffLines (First x) = map (enTag1 "s" . enText) x
    |            ^^^^^

src/Network/Gitit/Feed.hs:151:12: error:
    Not in scope: data constructor ‘Second’
    Perhaps you want to add ‘Second’ to the import list
    in the import of ‘Data.FileStore.Generic’
    (src/Network/Gitit/Feed.hs:39:1-46).
    |
151 | diffLines (Second x) = map (enTag1 "b" . enText) x
    |            ^^^^^^

src/Network/Gitit/Feed.hs:152:12: error:
    Not in scope: data constructor ‘Both’
    Perhaps you want to add ‘Both’ to the import list in the import of
    ‘Data.FileStore.Generic’ (src/Network/Gitit/Feed.hs:39:1-46).
    |
152 | diffLines (Both x _) = map enText x
    |            ^^^^
cabal: Leaving directory '/var/folders/6s/zdc0hvvx7kqcglg5yqm3kl4r0000gn/T/cabal-tmp-69068/gitit-0.12.3.2'
Updating documentation index
/Users/jaten/Library/Haskell/share/doc/x86_64-osx-ghc-8.2.2/index.html
cabal: Error: some packages failed to install:
gitit-0.12.3.2-7CdLGb1nifvBwu0GL6wEtb failed during the building phase. The
exception was:
ExitFailure 1
$

[jgm]

Try with the latest version of gitit, 0.13.0.0?
For some reason cabal is trying to install an earlier version.
I'd also recommend using a recent version of cabal (preferably 3.x).

[glycerine]

the stack based build did better, so closing.