[Agda] how to run helloworld in agda

[Andrea Vezzosi]

The agda files for the stdlib are going to be in
"/home/martin/adga2/agda-stadlib/src/" so that's what you should use
for the -i option.

The haskell library in "/home/martin/adga2/agda-stadlib/ffi/" is
needed when you compile some program using the MAlonzo haskell
backend, which is the default one.

If you actually want to run something like an helloworld you have to
compile it first.

bash$ agda -i/home/martin/adga2/agda-stadlib/ffi/ -i. --compile ag.agda

If you get problems try changing "module ag where" to "module Main where"





On Wed, Dec 9, 2015 at 3:23 PM, Mandy Martino <tesleft at hotmail.com> wrote:
> after untar  https://agda.github.io/agda-stdlib
>
> into  directory
> /home/martin/adga2/agda-stadlib
>
> cd  ffi
> cabal install Setup.hs
>
> does it mean that the  extracted  file path is the library  path ?
>
> /home/martin/adga2/agda-stadlib ?
>
> Regards,
>
> Martin
>
>
>> Subject: RE: [Agda] how to run helloworld in agda
>> From: mechvel at botik.ru
>> To: tesleft at hotmail.com
>> CC: agda at lists.chalmers.se
>> Date: Wed, 9 Dec 2015 15:41:17 +0400
>>
>> On Wed, 2015-12-09 at 19:11 +0800, Mandy Martino wrote:
>> > Hi,
>> >
>> >
>> > how to find the path of stdlib after it install ?
>> >
>>
>> For example, I have installed Standard library in
>>
>> /home/mechvel/agda/stLib/oct29-2015/src,
>>
>> so that this directory contains Algebra.agda, and other .agda files and
>> subdirectories.
>> Agda is called as
>>
>> agda -c $agdaLibOpt MyProgram.agda
>>
>> where $agdaLibOpt is
>>
>> -i . -i /home/mechvel/agda/stLib/oct29-2015/src -i /home/mechvel/source
>>
>> It lists 3 paths. The last path points to where reside my .agda files
>> which MyProgram imports.
>>
>> ------
>> Sergei
>>
>>
>> > martin at ubuntu:~/adga2/stdlib/agda-stdlib/ffi$ cat Setup.hs
>> > import Distribution.Simple
>> >
>> >
>> > main = defaultMain
>> >
>> >
>> > martin at ubuntu:~/adga2/stdlib/agda-stdlib$ ls
>> > agda-stdlib.agda-lib GenerateEverything.hs LICENCE
>> > README.md
>> > AllNonAsciiChars.hs GNUmakefile notes
>> > Setup.hs
>> > CHANGELOG Header publish-listings.sh src
>> > doc index.sh README
>> > ffi lib.cabal README.agda
>> >
>> >
>> >
>> > Regards,
>> >
>> >
>> > Martin
>> >
>> >
>> > > Subject: Re: [Agda] how to run helloworld in agda
>> > > From: mechvel at botik.ru
>> > > To: tesleft at hotmail.com
>> > > CC: agda at lists.chalmers.se
>> > > Date: Tue, 8 Dec 2015 21:06:16 +0400
>> > >
>> > > On Tue, 2015-12-08 at 16:10 +0800, Mandy Martino wrote:
>> > > > The interactive mode is no longer supported. Don't complain if it
>> > > > doesn't work.
>> > > > Main> :l ag.agda
>> > > > Checking ag (/home/martin/adga2/ag.agda).
>> > > > /home/martin/adga2/ag.agda:3,13-25
>> > > > Failed to find source of module IO.Primitive in any of the
>> > > > following locations:
>> > > > /home/martin/adga2/IO/Primitive.agda
>> > > > /home/martin/adga2/IO/Primitive.lagda
>> > >
>> > >
>> > > /home/martin/.cabal/share/i386-linux-ghc-7.10.1/Agda-2.4.2.3/lib/prim/IO/Primitive.agda
>> > >
>> > >
>> > > /home/martin/.cabal/share/i386-linux-ghc-7.10.1/Agda-2.4.2.3/lib/prim/IO/Primitive.lagda
>> > > > when scope checking the declaration
>> > > > open import IO.Primitive using (IO; putStrLn)
>> > > > Failed.
>> > > > Main>
>> > > >
>> > > > module ag where
>> > > >
>> > > > open import IO.Primitive using (IO; putStrLn)
>> > > > open import Data.String using (toCostring; String)
>> > > > open import Foreign.Haskell using (Unit)
>> > > >
>> > > > main : IO Unit
>> > > > main = putStrLn (toCostring "Hello, Agda!")
>> > > >
>> > >
>> > > I remove "module ag where" (because this module has `main' in it),
>> > > and apply
>> > >
>> > > agda -c $agdaLibOpt Hello.agda
>> > >
>> > > where $agdaLibOpt contains the path to the /src directory of
>> > > Standard library.
>> > > This makes the executable file Hello.
>> > > Then, the command
>> > >
>> > > ./Hello
>> > > prints
>> > > "Hello, Agda!"
>> > >
>> > >
>> > > > why use open import, but not import
>> > >
>> > > After "import Foo",
>> > >
>> > > one can write Foo.foo, if foo is defined in Foo module.
>> > > After
>> > > import Foo
>> > > open Foo using (foo)
>> > >
>> > > one can write `foo' in the scope.
>> > > And the line
>> > >
>> > > open import Foo using (foo)
>> > >
>> > > combines the above lines of `import' and `open'.
>> > >
>> > > Regards,
>> > >
>> > > ------
>> > > Sergei
>> > >
>> > >
>> > >
>> >
>>
>>
>
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