From 1cd8458c28bb06c90486023a52db3cee706a7a70 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Sat, 25 Oct 2025 02:09:06 +0300
Subject: [PATCH] tests/functional: Add source-paths tests

This has already been implemented in 1e709554d565be51ab8d5a7e4941b0cc1da70807
as a side-effect of mounting the accessors in storeFS. Let's test this so it
doesn't regress.

(cherry-picked from https://github.com/NixOS/nix/pull/12915)
---
 tests/functional/flakes/source-paths.sh | 34 +++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/tests/functional/flakes/source-paths.sh b/tests/functional/flakes/source-paths.sh
index 4709bf2fc..3aa3683c2 100644
--- a/tests/functional/flakes/source-paths.sh
+++ b/tests/functional/flakes/source-paths.sh
@@ -12,6 +12,10 @@ cat > "$repo/flake.nix" <<EOF
 {
   outputs = { ... }: {
     x = 1;
+    y = assert false; 1;
+    z = builtins.readFile ./foo;
+    a = import ./foo;
+    b = import ./dir;
   };
 }
 EOF
@@ -21,3 +25,33 @@ expectStderr 1 nix eval "$repo#x" | grepQuiet "error: Path 'flake.nix' in the re
 git -C "$repo" add flake.nix
 
 [[ $(nix eval "$repo#x") = 1 ]]
+
+expectStderr 1 nix eval "$repo#y" | grepQuiet "at $repo/flake.nix:"
+
+git -C "$repo" commit -a -m foo
+
+expectStderr 1 nix eval "git+file://$repo?ref=master#y" | grepQuiet "at «git+file://$repo?ref=master&rev=.*»/flake.nix:"
+
+expectStderr 1 nix eval "$repo#z" | grepQuiet "error: Path 'foo' does not exist in Git repository \"$repo\"."
+expectStderr 1 nix eval "git+file://$repo?ref=master#z" | grepQuiet "error: '«git+file://$repo?ref=master&rev=.*»/foo' does not exist"
+expectStderr 1 nix eval "$repo#a" | grepQuiet "error: Path 'foo' does not exist in Git repository \"$repo\"."
+
+echo 123 > "$repo/foo"
+
+expectStderr 1 nix eval "$repo#z" | grepQuiet "error: Path 'foo' in the repository \"$repo\" is not tracked by Git."
+expectStderr 1 nix eval "$repo#a" | grepQuiet "error: Path 'foo' in the repository \"$repo\" is not tracked by Git."
+
+git -C "$repo" add "$repo/foo"
+
+[[ $(nix eval --raw "$repo#z") = 123 ]]
+
+expectStderr 1 nix eval "$repo#b" | grepQuiet "error: Path 'dir' does not exist in Git repository \"$repo\"."
+
+mkdir -p "$repo/dir"
+echo 456 > "$repo/dir/default.nix"
+
+expectStderr 1 nix eval "$repo#b" | grepQuiet "error: Path 'dir' in the repository \"$repo\" is not tracked by Git."
+
+git -C "$repo" add "$repo/dir/default.nix"
+
+[[ $(nix eval "$repo#b") = 456 ]]