Issue when trying to install

[Arun Nanduri]

Hello all,

First off, thank you Brent for this very nice package, I am learning a bunch from reading the docs/paper/source. I've been trying to install it so I can play with it for a while, but am running into a problem I haven't been able to Google. It could also just be a Haskell-specific problem since I'm pretty new to that as well.

When I go into a directory (running macOS) and type `cabal install diagrams` (after updating cabal), I get the following message, stored in this gist. Basically, it's telling me that it can't resolve some dependencies.

But that's confusing to me, since I haven't installed it successfully before, and I'm also running that command right after `cabal sandbox init`. So for a fresh install, should it be having trouble resolving dependencies? Is there something I can do to fix it on my end?

Thanks a lot for your help.

Arun

[Francesco Ariis]

Hello Arun

Il 18 novembre 2020 alle 14:47 Arun Nanduri ha scritto:
> When I go into a directory (running macOS) and type `cabal install
> diagrams` (after updating cabal), I get the following message, stored in this

> gist <https://gist.github.com/ananduri/180fe1a1c97482b289f087660d1c6414>.

> Basically, it's telling me that it can't resolve some dependencies.

I suspect boundaries for base have yet to be bumped. I think you can
solve it with --allow-newer meanwhile.
Let us know if it works! —F

[Arun Nanduri]

Hi Francesco,

Thanks a lot for your advice, it helped. I tried running `cabal install diagrams --allow-newer`, and it made a lot of progress in the installation. However, when it tried to compile everything, I ran into an error on the 71st item:

[71 of 73] Compiling Diagrams.Backend.CmdLine ( src/Diagrams/Backend/CmdLine.hs, dist/dist-sandbox-49207e1b/build/Diagrams/Backend/CmdLine.o, dist/dist-sandbox-49207e1b/build/Diagrams/Backend/CmdLine.dyn_o )

src/Diagrams/Backend/CmdLine.hs:223:23: error:

    • Couldn't match expected type ‘ParseError’

                  with actual type ‘Maybe String -> ParseError’

    • Probable cause: ‘ShowHelpText’ is applied to too few arguments

      In the first argument of ‘abortOption’, namely ‘ShowHelpText’

      In the expression: abortOption ShowHelpText

      In the expression:

        abortOption ShowHelpText

          $ mconcat [long "help", short '?', help "Show this help text"]

    |

223 | helper' = abortOption ShowHelpText $ mconcat

    |                       ^^^^^^^^^^^^

cabal: Leaving directory '/var/folders/65/b3kdpf016518_w4nwh9hxvz40000gp/T/cabal-tmp-43858/diagrams-lib-1.4.3'

cabal: Error: some packages failed to install:

diagrams-1.4-9bqvWxaY20Y30AEfwC7ius depends on diagrams-1.4 which failed to

install.

diagrams-contrib-1.4.4-7OhCX32H3SsD0Mmslpo4Ad depends on

diagrams-contrib-1.4.4 which failed to install.

diagrams-lib-1.4.3-1fR1LFhe6YD45cwFeos83f failed during the building phase.

The exception was:

ExitFailure 1

diagrams-svg-1.4.3-CA35y7ooae56EdHY5mOzox depends on diagrams-svg-1.4.3 which

failed to install.

Some searching indicates that this isn't Diagrams-specific, for example this stack Github issue. So at this point I might be beyond the scope of this group, but still wondering if you have seen this error or know how I might get around it? Maybe there is a way in cabal to specify that it should only depend on an older version of optparse-applicative?

Thanks for your help,

Arun 

[Brent Yorgey]

Maybe try  --allow-newer --constraint='optparse-applicative < 0.16'  ?

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[Arun Nanduri]

Thank you Brent, that was what I needed, it installed. Looking forward to playing with Diagrams now.

Cheers,

Arun

[Brent Yorgey]

Great!  Let us know if you run into any more questions.

-Brent

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