#!/usr/bin/env -S nix-shell --pure
#!nix-shell -i bash
# Development environment for sisudoc-spine-search-cgi.
# Builds the spine_search CGI binary via ./package.nix.
#
# Build logic for the spine_search derivation lives in ./package.nix -
# this file only describes the dev shell.
#
# Usage:
#   nix-shell                           # enters shell, builds spine_search
#   nix-shell --run 'echo $SPINE_SEARCH_BIN'
{
  pkgs ? import <nixpkgs> {},
  spine-search ? pkgs.callPackage ./package.nix {},
  # captured at eval time - nix-shell rewrites $SHELL at runtime,
  # so we must remember the user's real login shell here.
  userShell ? builtins.getEnv "SHELL",
}:
with pkgs;
  mkShell {
    name = "spine_search base dev shell";
    packages = [
      # ❯❯❯ spine_search CGI binary built from ./package.nix
      spine-search
      # ❯❯❯ d_build_related
      ldc
      #dmd
      dub
      # ❯❯❯ dev
      gnumake
      git
      # ❯❯❯ nix workflow
      direnv
      nix-direnv
      nix-prefetch-git
      nix-output-monitor
      nix-tree
      jq
      # ❯❯❯ sqlite
      sqlite
    ];
    shellHook = ''
      export Date=$(date "+%Y%m%d")
      ## set local values in .envrc-local (or here if you must)
      ## spine_search lives under cgi-bin, not bin - expose it via env
      ## var and prepend cgi-bin to PATH for convenience.
      export SPINE_SEARCH_BIN="${spine-search}/cgi-bin/spine_search"
      export PATH="${spine-search}/cgi-bin:$PATH"
      echo "spine_search: $SPINE_SEARCH_BIN"
      ## hand off to the user's login shell (e.g. zsh) only when this
      ## is an interactive nix-shell entry - not under `nix-shell --run`
      ## or `--command`, where exec would swallow the command. Guard env
      ## var prevents re-entry loops.
      __spine_user_shell=${if userShell == "" then "" else "\"" + userShell + "\""}
      if [ -z "$__SPINE_SEARCH_SHELL_HANDOFF" ] \
         && [ -n "$__spine_user_shell" ] \
         && [ "$(basename "$__spine_user_shell")" != "bash" ] \
         && [[ $- == *i* ]]; then
        export __SPINE_SEARCH_SHELL_HANDOFF=1
        exec "$__spine_user_shell"
      fi
      unset __spine_user_shell
    '';
  }