#!/usr/bin/env -S nix-shell --pure
#!nix-shell -i bash
{ pkgs ? import <nixpkgs> {} }:
with pkgs;
mkShell {
  buildInputs = [
    ### nix_related
    direnv
    nixVersions.unstable #nixFlakes
    nix-prefetch-git
    validatePkgConfig
    nix-tree jq
    git
    ps
    ### d_build_related
    ## package manager
    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
    ### candy
    starship
  ];
  shellHook = ''
    #if [[ -f ".envrc" ]]; then
    #  source .envrc
    #fi
    nix flake lock --update-input nixpkgs
    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 ""
    echo "nix build or nix develop? (suggestions):"
    echo '- nix build'
    echo '  nix build .#spine --print-build-logs'
    echo '    nix build --print-build-logs'
    echo '- nix run'
    echo '  nix run .#spine --print-build-logs'
    echo '  nix run default.nix --print-build-logs'
    echo '- nix shell'
    echo '  nix shell --print-build-logs --command spine -v'
    echo '- nix develop'
    echo '  nix develop --build  .#spine --print-build-logs'
    echo '  nix develop --build -f derivation.nix -I .envrc --print-build-logs'
    echo '    nix develop ; eval "$buildPhase"'
    echo ""
    echo  'spine -v'
    echo "examine"
    echo '  nix-instantiate | nix show-derivation | jq'
    echo '  nix-build . --no-out-link | xargs -o nix-tree'
    echo '  nix-tree --derivation .#spine'
    echo ""
    #echo "ldc `${pkgs.ldc}/bin/ldc2 -v`"
  '';
}