From 1a89305f1885c0e710ff36d2c49b128b90b5de7c Mon Sep 17 00:00:00 2001
From: Colin <colin@uninsane.org>
Date: Sun, 20 Jul 2025 20:55:25 +0000
Subject: [PATCH] static-nix-shell: more clearly mark the nix-shell preambles

---
 pkgs/by-name/static-nix-shell/package.nix | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/pkgs/by-name/static-nix-shell/package.nix b/pkgs/by-name/static-nix-shell/package.nix
index 5aaf6c987..c33210c20 100644
--- a/pkgs/by-name/static-nix-shell/package.nix
+++ b/pkgs/by-name/static-nix-shell/package.nix
@@ -105,13 +105,19 @@ in rec {
 
       buildPhase = ''
         runHook preBuild
-        #^ TODO: each shell should use preBuild to compute a `shellPreamble`
 
         die() {
           echo "$@"
           exit 1
         }
 
+        if [ -n "$shellPreamble" ]; then
+        shellPreamble="
+        # --- BEGIN: nix-shell preamble (generated code) ---
+        $shellPreamble
+        # --- END:   nix-shell preamble (generated code) ---
+        "
+        fi
         substituteInPlace ${srcPath} \
           --replace-fail '#!/usr/bin/env nix-shell' '#!${interpreter}' \
           --replace-fail \
@@ -241,6 +247,7 @@ in rec {
       pkgsEnv = [ zsh ] ++ (builtins.attrValues pkgsAsAttrs);
       pkgExprs = insertTopo "zsh" (builtins.attrNames pkgsAsAttrs);
     in mkShell ({
+      # TODO: generate `shellPreamble` here to reduce wrapping
       inherit pkgsEnv pkgExprs;
       interpreter = lib.getExe zsh;
     } // (removeAttrs attrs [ "pkgs" "zsh" ])
@@ -253,6 +260,7 @@ in rec {
       pkgsEnv = builtins.attrValues pkgsAsAttrs;
       pkgExprs = insertTopo "python3" (builtins.attrNames pkgsAsAttrs);
     in mkShell ({
+      # TODO: generate `shellPreamble` here to reduce wrapping
       inherit pkgsEnv pkgExprs;
       interpreter = lib.getExe python3;
       interpreterName = "python3";