#!/usr/bin/env -S nix-shell --pure
#!nix-shell -i bash
{ pkgs ? import <nixpkgs> {} }:
with pkgs;
mkShell {
  buildInputs = [
    #nix
    direnv
    nixVersions.unstable #nixFlakes
    nix-prefetch-git
    validatePkgConfig
    nix-tree jq nix-output-monitor
    git
    gnumake
    ps
    ### d_build_related
    dub
    ## compiler
    ldc
    rund
    ## linker
    #lld
    #mold
    ## builder
    #ninja
    #meson
    ### sqlite search related
    sqlite
    ### pdf_latex_related
    # source-sans-pro
    # source-serif-pro
    # source-code-pro
    # texlive.combined.scheme-full
    ### xml_and_epub_related
    # libxml2
    # html-tidy
    # xmlstarlet
    # epubcheck
    # ebook_tools
    # epr
    # sigil
    # calibre #(suite includes: ebook-viewer)
    # foliate
    ### i18n translation related
    # perl534Packages.Po4a
  ];
  shellHook = ''
    #if [[ -f ".envrc" ]]; then
    #  source .envrc
    #fi
    nix flake update
    echo ""
    echo "nix flake metadata:"
    nix flake metadata
    echo ""
    echo "nix flake check:"
    nix flake check
    echo ""
    echo "nix flake show:"
    nix flake show
    echo "
      nix flake update
      nix flake metadata
      nix flake check
      nix flake show

      nix build or nix develop? (suggestions):

      - nix build
        nix build .#default --print-build-logs
        nix build --print-build-logs
        nix build .#default --print-build-logs |& nom

      - nix run
        nix run .#default --print-build-logs
        nix run default.nix --print-build-logs

      - nix shell
        nix shell --print-build-logs --command spine -v

      - nix develop
        nix develop --build .#default --print-build-logs
        nix develop --build -f derivation.nix -I .envrc --print-build-logs
        nix develop ; eval \$buildPhase

        nix-build |& nom

      spine -v

      nix-instantiate | nix show-derivation | jq
      nix-build . --no-out-link | xargs -o nix-tree
      nix-tree --derivation .#default

      nix flake update && nix flake check --show-trace && nix flake show && nix develop .#devShell
      nix build .#default --print-build-logs

      - nix build .#spine-dmd --print-build-logs
      - nix build .#spine-ldc --print-build-logs
      - nix build .#spine-gdc --print-build-logs
    "
    #echo "ldc `${pkgs.ldc}/bin/ldc2 -v`"
  '';
}