"ghc --make Odhug.hs" encounter errors

[luckypoem]

hi.

root@AR:/usr/local/odhug.github.com/source# ghc --make Odhug.hs
[1 of 1] Compiling Main ( Odhug.hs, Odhug.o )

Odhug.hs:136:46: error:
• Couldn't match type ‘unordered-containers-0.2.7.1:Data.HashMap.Base.HashMap
Data.Text.Internal.Text
aeson-0.11.2.1:Data.Aeson.Types.Internal.Value’
with ‘Map.Map [Char] [Char]’
Expected type: Map.Map [Char] [Char]
Actual type: Metadata
• In the second argument of ‘Map.lookup’, namely ‘metadata’
In the expression: Map.lookup "title" metadata
In the expression:
case Map.lookup "title" metadata of {
Just value -> "OdHUG - " ++ value
Nothing -> [] }

Odhug.hs:158:12: error:
Variable not in scope: replace :: [Char] -> [Char] -> [Char] -> b

Odhug.hs:159:13: error:
Variable not in scope:
replace :: [Char] -> [Char] -> String -> [Char]

Odhug.hs:165:52: error:
• Couldn't match type ‘unordered-containers-0.2.7.1:Data.HashMap.Base.HashMap
Data.Text.Internal.Text
aeson-0.11.2.1:Data.Aeson.Types.Internal.Value’
with ‘Map.Map [Char] String’
Expected type: Map.Map [Char] String
Actual type: Metadata
• In the second argument of ‘Map.lookup’, namely ‘mdata’
In the second argument of ‘($)’, namely
‘Map.lookup "eventDate" mdata’
In a stmt of a 'do' block:
dateStr <- hoistMaybe $ Map.lookup "eventDate" mdata

Odhug.hs:183:3: error:
• Variable not in scope: encode :: [b0] -> String
• Perhaps you meant ‘decode’ (imported from Data.String.UTF8)

Odhug.hs:184:5: error:
Variable not in scope: toJSObject :: [([Char], String)] -> b0
root@AR:/usr/local/odhug.github.com/source#

how to fix them?

[sigrlami]

@luckypoem simple solution - use [stack](https://docs.haskellstack.org/en/stable/README/) look at README. Longer version, notice that compiler tells you

Couldn't match type ‘unordered-containers-0.2.7.1:Data.HashMap.Base.HashMap

You have probably outdated/wrong version of Hakyll and unordered-containers packages.

[luckypoem]

HI.

@sigrlami

I RAN "stack build",but i still got error:
...
Preprocessing executable 'Odhug' for odhug-0.9.1.15...

/usr/local/odhug.github.com/source/Odhug.hs:23:8:
Could not find module ‘Data.String.UTF8’
It is a member of the hidden package ‘utf8-string-1.0.1.1@utf8s_HWC8Qen5AZrArJxFQJuE72’.
Perhaps you need to add ‘utf8-string’ to the build-depends in your .cabal file.

then what to do?
thank you.

[sigrlami]

@luckypoem I just cloned repo and tested out. Everything builds. Please do stack --version and show output. Which Cabal version do you have?

[luckypoem]

hi.

root@AR:/usr/local/odhug.github.com# cabal --version
cabal-install version 1.24.0.0
compiled using version 1.24.0.0 of the Cabal library
root@AR:/usr/local/odhug.github.com# stack --version
Version 1.1.2, Git revision cebe10e845fed4420b6224d97dcabf20477bbd4b (3646 commits) i386 hpack-0.14.0
root@AR:/usr/local/odhug.github.com# ghc --version
The Glorious Glasgow Haskell Compilation System, version 8.0.1
root@AR:/usr/local/odhug.github.com#

the versions of cabal,stack,ghc are not suitable?

[sigrlami]

@luckypoem might be, so I have stack 1.2.1 and probably stack picking your global GHC instead of local install. I'll update repo soon

[sigrlami]

@luckypoem I've updated code to support GHC 8.0. Pull updates and build again, should work now.