Building Elm from source

[Ryan Rempel]

I was trying to build the master branch from source -- I wanted to test what the effect of some of the recent changes on my own code was.

In the past, I have succeeded in such an attempt.

However, at the moment, that doesn't seem to be working. For instance, the 'official' 

runhaskell installers/BuildFromSource.hs master

method ends with errors of this nature:

src/TheMasterPlan.hs:11:18:

    Could not find module ‘Elm.Package.Name’

    Perhaps you meant Elm.Package.Paths (from elm-package-0.5.1)

    Use -v to see a list of the files searched for.

src/TheMasterPlan.hs:12:18:

    Could not find module ‘Elm.Package.Version’

    Perhaps you meant Elm.Package.Solution (from elm-package-0.5.1)

    Use -v to see a list of the files searched for.

Are other people seeing this as well? Or is it a problem with my setup?

[Laszlo Pandy]

The master branches are not all compatible right now. I added this to BuildFromSource.hs to get it to work:
"next" =:
        [ "elm-compiler" =: "master"
        , "elm-package"  =: "master"
        , "elm-make"     =: "next"
        ]

Note that even if you get it to build, you cannot compile your code because elm-compiler/master is in the middle of a refactor and it is throwing errors. The last known good version of elm-compiler is:
https://github.com/elm-lang/elm-compiler/commit/fa6377ff1be72b1a8af0c0b6b0afe17ca02a09db

So maybe this config would work (but I have never tried to see if it is compatible with elm-make):
"next" =:
        [ "elm-compiler" =: "fa6377ff1be72b1a8af0c0b6b0afe17ca02a09db"
        , "elm-package"  =: "master"
        , "elm-make"     =: "next"
        ]

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[Ryan Rempel]

Thanks, that did get further ... now it errors in this way:

Configuring elm-package-0.5.1...

Building elm-package-0.5.1...

Preprocessing library elm-package-0.5.1...

[10 of 16] Compiling Elm.Package.Constraint ( src/Elm/Package/Constraint.hs, dist/dist-sandbox-c8eef042/build/Elm/Package/Constraint.o )

src/Elm/Package/Constraint.hs:57:6:

    Found hole ‘_major’ with type: Package.Version -> a0

    Where: ‘a0’ is an ambiguous type variable

    Relevant bindings include

      defaultElmVersion :: Constraint

        (bound at src/Elm/Package/Constraint.hs:56:1)

    In the expression: Package._major

    In the first argument of ‘(>)’, namely

      ‘Package._major Compiler.version’

    In the expression: Package._major Compiler.version > 0

I think I'll just wait for things to settle out -- I don't want to distract from all the awesome work going on.

[Joey Eremondi]

Yeah... Js generation is currently an unimplemented hole in Master... When I get a chance I'll see if I can find a stable set of commits for you to try.