Mac 10.15 compiling using ghc

Mac 10.15 compiling using ghc

[Uwe Brauer]

Hi

Under linux (Ubuntu 16.04)

I run successfully 

 ghc --make striplatex.hs 
where striplatex is just

,----
| import Text.Pandoc.JSON
|     
| main = toJSONFilter stripmath
|     where stripmath (Math _ _) = Str "FORMULA"
|           stripmath x = x
`----

That nicely replaces all my mathematical formula, just by the word
FORMULA

I tried the same under Mac 10.15. 

For that I installed pandoc https://github.com/jgm/pandoc/releases/tag/2.13

I install ghc using fink (that is one of the three linux like
environments (the others are macports and homebrew).

However when I run 

 ghc --make striplatex.hs 

I obtain 

Could not find module Text.Pandoc.JSON

I admit I just started using a Mac and don't know many details.

Any help would be appreciated 

Thanks

Uwe Brauer 

Re: Mac 10.15 compiling using ghc

[John MacFarlane]

The issue is that ghc doesn't know where to find the dependent
libraries (in this case pandoc-types).  On ubuntu you probably
had this installed in a central location.

Generally, to build Haskell code with dependencies you need to
use stack or cabal.

But see here:
https://stackoverflow.com/questions/65539773/compiling-a-haskell-script-with-external-dependencies-without-cabal

It looks like you can do:

cabal install --lib pandoc-types
ghc --make striplatex.hs

Try that.

Uwe Brauer <oub-YB6e1s5WF/He5aOfsHch1g@public.gmane.org> writes:

> Hi
>
> Under linux (Ubuntu 16.04)
>
> I run successfully 
>
>  ghc --make striplatex.hs 
> where striplatex is just
>
> ,----
> | import Text.Pandoc.JSON
> |     
> | main = toJSONFilter stripmath
> |     where stripmath (Math _ _) = Str "FORMULA"
> |           stripmath x = x
> `----
>
> That nicely replaces all my mathematical formula, just by the word
> FORMULA
>
> I tried the same under Mac 10.15. 
>
> For that I installed pandoc https://github.com/jgm/pandoc/releases/tag/2.13
>
> I install ghc using fink (that is one of the three linux like
> environments (the others are macports and homebrew).
>
> However when I run 
>
>  ghc --make striplatex.hs 
>
> I obtain 
>
> Could not find module Text.Pandoc.JSON
>
> I admit I just started using a Mac and don't know many details.
>
> Any help would be appreciated 
>
> Thanks
>
> Uwe Brauer 
>
> -- 
> You received this message because you are subscribed to the Google Groups "pandoc-discuss" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
> To view this discussion on the web visit https://groups.google.com/d/msgid/pandoc-discuss/87wnsjewqw.fsf%40mat.ucm.es.

Re: Mac 10.15 compiling using ghc

[John MacFarlane]

Actually, it's probably best to do

cabal install --lib pandoc-types --package-env .

which will not change the global cabal environment,
but will just affect the working directory.

John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:

> The issue is that ghc doesn't know where to find the dependent
> libraries (in this case pandoc-types).  On ubuntu you probably
> had this installed in a central location.
>
> Generally, to build Haskell code with dependencies you need to
> use stack or cabal.
>
> But see here:
> https://stackoverflow.com/questions/65539773/compiling-a-haskell-script-with-external-dependencies-without-cabal
>
> It looks like you can do:
>
> cabal install --lib pandoc-types
> ghc --make striplatex.hs
>
> Try that.
>
> Uwe Brauer <oub-YB6e1s5WF/He5aOfsHch1g@public.gmane.org> writes:
>
>> Hi
>>
>> Under linux (Ubuntu 16.04)
>>
>> I run successfully 
>>
>>  ghc --make striplatex.hs 
>> where striplatex is just
>>
>> ,----
>> | import Text.Pandoc.JSON
>> |     
>> | main = toJSONFilter stripmath
>> |     where stripmath (Math _ _) = Str "FORMULA"
>> |           stripmath x = x
>> `----
>>
>> That nicely replaces all my mathematical formula, just by the word
>> FORMULA
>>
>> I tried the same under Mac 10.15. 
>>
>> For that I installed pandoc https://github.com/jgm/pandoc/releases/tag/2.13
>>
>> I install ghc using fink (that is one of the three linux like
>> environments (the others are macports and homebrew).
>>
>> However when I run 
>>
>>  ghc --make striplatex.hs 
>>
>> I obtain 
>>
>> Could not find module Text.Pandoc.JSON
>>
>> I admit I just started using a Mac and don't know many details.
>>
>> Any help would be appreciated 
>>
>> Thanks
>>
>> Uwe Brauer 
>>
>> -- 
>> You received this message because you are subscribed to the Google Groups "pandoc-discuss" group.
>> To unsubscribe from this group and stop receiving emails from it, send an email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
>> To view this discussion on the web visit https://groups.google.com/d/msgid/pandoc-discuss/87wnsjewqw.fsf%40mat.ucm.es.

Re: Mac 10.15 compiling using ghc

[Uwe Brauer]

--=-=-=
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Content-Transfer-Encoding: quoted-printable

>>> "JM" =3D=3D John MacFarlane <jgm@berkeley.edu> writes:

> Actually, it's probably best to do

> cabal install --lib pandoc-types --package-env .

Thanks which cabal version fink provides 1.22.6=20


https://www.haskell.org/cabal/download.html

Provides a much higher version but only for High Sierra while I run
catalina.

Any suggestions?

Regards

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--=-=-=--

Re: Mac 10.15 compiling using ghc

[John MacFarlane]

You need a fairly recent cabal, at least 2 and maybe >= 2.4?

I didn't know anyone used fink any more.
brew will give you a recent cabal version.

Or, you can use ghcup to get a recent ghc and cabal:
https://www.haskell.org/ghcup/


Uwe Brauer <oub-YB6e1s5WF/He5aOfsHch1g@public.gmane.org> writes:

>>>> "JM" == John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:
>
>> Actually, it's probably best to do
>
>> cabal install --lib pandoc-types --package-env .
>
> Thanks which cabal version fink provides 1.22.6 
>
>
> https://www.haskell.org/cabal/download.html
>
> Provides a much higher version but only for High Sierra while I run
> catalina.
>
> Any suggestions?
>
> Regards

Re: Mac 10.15 compiling using ghc

[John MacFarlane]

Although with the old version of cabal you have, it might
work just to do

cabal install pandoc-types

and then ghc --make as before.

John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:

> You need a fairly recent cabal, at least 2 and maybe >= 2.4?
>
> I didn't know anyone used fink any more.
> brew will give you a recent cabal version.
>
> Or, you can use ghcup to get a recent ghc and cabal:
> https://www.haskell.org/ghcup/
>
>
> Uwe Brauer <oub-YB6e1s5WF/He5aOfsHch1g@public.gmane.org> writes:
>
>>>>> "JM" == John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:
>>
>>> Actually, it's probably best to do
>>
>>> cabal install --lib pandoc-types --package-env .
>>
>> Thanks which cabal version fink provides 1.22.6 
>>
>>
>> https://www.haskell.org/cabal/download.html
>>
>> Provides a much higher version but only for High Sierra while I run
>> catalina.
>>
>> Any suggestions?
>>
>> Regards

Re: Mac 10.15 compiling using ghc

[Uwe Brauer]

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>>> "JM" == John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:

> Although with the old version of cabal you have, it might
> work just to do

> cabal install pandoc-types

> and then ghc --make as before.


Not sure my answer went through. 

I followed your advice and obtained 

,----
| 
| I tried that but obtained 
| Text/Pandoc/Legacy/Definition.hs:103:14: parse error on input ‘{’
| cabal: Error: some packages failed to install:
| pandoc-types-1.20 failed during the building phase. The exception was:
| ExitFailure 1
`----

Then I tried  cabal install cabal-install

And obtained 

,----
| cabal: Error: some packages failed to install:
| Cabal-3.0.2.0 failed during the configure step. The exception was:
| user error ('/opt/sw/bin/ghc' exited with an error:
| 
| /var/folders/j1/7bbsk0jj6nxd5yxndqwvb1t00000gn/T/cabal-tmp-29800/Cabal-3.0.2.0/Distribution/Parsec.hs:134:7:
| error: function-like macro 'MIN_VERSION_base' is not defined
| #if !(MIN_VERSION_base(4,13,0))
| ^
| 1 error generated.
| )
| cabal-install-3.0.0.0 depends on Cabal-3.0.2.0 which failed to install.
| hackage-security-0.5.3.0 depends on Cabal-3.0.2.0 which failed to install.
| 
`----

Sigh, I don't recall a time where this worked flawlessly.

Andy advice would be welcome, I shall also ask on the fink mailing list.

An alternative would be to un install fink's cabal pkg and try to
install it directly.

Regards

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[some success] (was: Mac 10.15 compiling using ghc)

[Uwe Brauer]

>>> "JM" == John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:

> Although with the old version of cabal you have, it might
> work just to do

> cabal install pandoc-types

> and then ghc --make as before.

So finally 

    1. I un installed the ghc provided by fink,

    2. I then used  https://www.haskell.org/ghcup/

    3. And installed ghc and the corresponding cabal version

    4. cabal install --lib pandoc-types

ghc --make stripmath.hs

,----
| Loaded package environment from /Users/oub/.ghc/x86_64-darwin-8.10.4/environments/default
| [1 of 1] Compiling Main             ( stripmath.hs, stripmath.o )
| 
| stripmath.hs:4:38: error:
|     • Couldn't match expected type ‘Data.Text.Internal.Text’
|                   with actual type ‘[Char]’
|     • In the first argument of ‘Str’, namely ‘"FORMULA"’
|       In the expression: Str "FORMULA"
|       In an equation for ‘stripmath’:
|           stripmath (Math _ _) = Str "FORMULA"
|   |
| 4 |     where stripmath (Math _ _) = Str "FORMULA"
|   |                                      ^^^^^^^^^
| 
`----

Sigh, what is now the problem?

Regards


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Re: [some success] (was: Mac 10.15 compiling using ghc)

[John MacFarlane]

This one is easy.  After this filter was written, pandco-types
changed to using Text instead of String.

Probably the easiest fix is to add the line

{-# LANGUAGE OverloadedStrings #-}

to the top of the filter.

Uwe Brauer <oub-YB6e1s5WF/He5aOfsHch1g@public.gmane.org> writes:

>>>> "JM" == John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:
>
>> Although with the old version of cabal you have, it might
>> work just to do
>
>> cabal install pandoc-types
>
>> and then ghc --make as before.
>
> So finally 
>
>     1. I un installed the ghc provided by fink,
>
>     2. I then used  https://www.haskell.org/ghcup/
>
>     3. And installed ghc and the corresponding cabal version
>
>     4. cabal install --lib pandoc-types
>
> ghc --make stripmath.hs
>
> ,----
> | Loaded package environment from /Users/oub/.ghc/x86_64-darwin-8.10.4/environments/default
> | [1 of 1] Compiling Main             ( stripmath.hs, stripmath.o )
> | 
> | stripmath.hs:4:38: error:
> |     • Couldn't match expected type ‘Data.Text.Internal.Text’
> |                   with actual type ‘[Char]’
> |     • In the first argument of ‘Str’, namely ‘"FORMULA"’
> |       In the expression: Str "FORMULA"
> |       In an equation for ‘stripmath’:
> |           stripmath (Math _ _) = Str "FORMULA"
> |   |
> | 4 |     where stripmath (Math _ _) = Str "FORMULA"
> |   |                                      ^^^^^^^^^
> | 
> `----
>
> Sigh, what is now the problem?
>
> Regards
>
>
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Re: [some success]

[Uwe Brauer]

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>>> "JM" == John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:

> This one is easy.  After this filter was written, pandco-types
> changed to using Text instead of String.

> Probably the easiest fix is to add the line

> {-# LANGUAGE OverloadedStrings #-}

That worked, thanks very much, now I am back in business with pandoc.

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