From 7cb66fd5791ac95863fa9e13c419af5b25984e90 Mon Sep 17 00:00:00 2001
From: Silvan Mosberger <silvan.mosberger@tweag.io>
Date: Fri, 12 Jul 2024 04:10:29 +0200
Subject: [PATCH] tests.makeBinaryWrapper: Prevent rebuilds when Nix files
 change

The source included way more files than it really needed.
This commit limits it to exactly those it needs.

This also makes sure that no rebuild is necessary when any Nix
file changes, in particular useful when we reformat the Nix files.
---
 pkgs/test/make-binary-wrapper/default.nix | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/pkgs/test/make-binary-wrapper/default.nix b/pkgs/test/make-binary-wrapper/default.nix
index 4c6fffd100a7..0d699900cf6d 100644
--- a/pkgs/test/make-binary-wrapper/default.nix
+++ b/pkgs/test/make-binary-wrapper/default.nix
@@ -15,16 +15,25 @@ let
   makeGoldenTest = testname: runCommand "make-binary-wrapper-test-${testname}" env ''
     mkdir -p tmp/foo # for the chdir test
 
-    params=$(<"${./.}/${testname}.cmdline")
+    source=${lib.fileset.toSource {
+      root = ./.;
+      fileset = lib.fileset.unions [
+        (./. + "/${testname}.cmdline")
+        (./. + "/${testname}.c")
+        (lib.fileset.maybeMissing (./. + "/${testname}.env"))
+      ];
+    }}
+
+    params=$(<"$source/${testname}.cmdline")
     eval "makeCWrapper /send/me/flags $params" > wrapper.c
 
-    diff wrapper.c "${./.}/${testname}.c"
+    diff wrapper.c "$source/${testname}.c"
 
-    if [ -f "${./.}/${testname}.env" ]; then
+    if [ -f "$source/${testname}.env" ]; then
       eval "makeWrapper ${envCheck} wrapped $params"
       env -i ./wrapped > env.txt
       sed "s#SUBST_ARGV0#${envCheck}#;s#SUBST_CWD#$PWD#" \
-        "${./.}/${testname}.env" > golden-env.txt
+        "$source/${testname}.env" > golden-env.txt
       if ! diff env.txt golden-env.txt; then
         echo "env/argv should be:"
         cat golden-env.txt