nix keeping: nix-shell, nix-build derivation.nix

1 files changed, 54 insertions, 7 deletions

diff --git a/shell.nix b/shell.nix
index cd031ed..814c915 100755
--- a/shell.nix
+++ b/shell.nix
@@ -1,17 +1,64 @@
-{pkgs-nix ? import <nixpkgs> {}}:
-with pkgs-nix;
+#!/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 $SHELL at runtime,
+  # so we must remember the user's real login shell here.
+  userShell ? builtins.getEnv "SHELL",
+}:
+with pkgs;
   mkShell {
-    buildInputs = [
-      # nix workflow
+    name = "spine_search base dev shell";
+    packages = [
+      # ❯❯❯ spine_search CGI binary built from ./package.nix
+      spine-search
+      # ❯❯❯ d_build_related
+      ldc
+      #dmd
+      dub
+      # ❯❯❯ dev
+      gnumake
+      git
+      # ❯❯❯ nix workflow
       direnv
       nix-direnv
       nix-prefetch-git
       nix-output-monitor
       nix-tree
       jq
-      git
-      # project build
-      gnumake
+      # ❯❯❯ sqlite
       sqlite
     ];
+    shellHook = ''
+      export Date=$(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
+    '';
   }