distributable:
  url: https://downloads.haskell.org/~ghc/{{ version}}/ghc-{{ version}}-src.tar.xz
  strip-components: 1

versions:
  - 9.2.4
  #TODO
  # github: ghc/ghc/tags
  # strip:
  #   - /^ghc-/
  #   - /-release$/


#NOTE relocatable if we edit the shell scripts

provides:
  - bin/ghc
  - bin/ghc-pkg
  - bin/ghci
  - bin/haddock
  - bin/hp2ps
  - bin/hpc
  - bin/hsc2hs
  - bin/runghc
  - bin/runhaskell

dependencies:
  gnu.org/gmp: 6
  invisible-island.net/ncurses: 6
  tea.xyz/gx/cc: c99  # ghc uses `gcc` as part of its build process

build:
  dependencies:
    gnu.org/autoconf: ^2
    gnu.org/automake: ^1  # `aclocal` is used during the build for some reason
    tea.xyz/gx/make: '*'  #FIXME specifically, gnu make is *required*
    curl.se: '*'
    gnu.org/m4: '*'
  script: |-
    # `ghc` needs `ghc` to bootstrap `ghc`
    # The canonical way to achieve this is with `ghcup`
    # To that end, we capture $HOME so as to no pollute the user's life with unwanted
    # stage0 tooling. Instead, everything is localized to {{ prefix }}/src, and can be
    # cleaned up at will, and won't capture any of the user's workflow

    export HOME={{ prefix }}/src
    export BOOTSTRAP_HASKELL_NONINTERACTIVE=1
    export BOOTSTRAP_HASKELL_ADJUST_BASHRC=0
    export BOOTSTRAP_HASKELL_GHC_VERSION={{ version }}

    if test -d .ghcup; then
      echo "ghcup already installed"
    else
      curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh
    fi

    PATH="{{ prefix }}/src/.ghcup/bin:$PATH"

    if test -e {{ prefix }}/src/.cabal/bin; then
      rm -r {{ prefix }}/src/.cabal/bin
    fi

    cabal update && cabal install alex happy

    export PATH="{{ prefix }}/src/.cabal/bin:$PATH"
    GHC="{{ prefix }}/src/.ghcup/bin/ghc"

    export CPATH=/opt/invisible-island.net/ncurses/v6/include/ncursesw:$CPATH

    #FIXME oddly, they don’t provide `./configure`; we have to generate it
    autoconf
    ./configure --prefix={{ prefix }}

    hadrian/build -j install --prefix={{ prefix }} --docs=none

test:
  script: |
    out=$(runghc $FIXTURE)
    test "$out" = "Hello World"
  fixture:
    main = putStrLn "Hello World"