pkgs/sandbox: Add handling for XDG_CACHE_HOME

We only handle XDG_DATA_HOME and XDG_CONFIG_HOME, but we've missed
XDG_CACHE_HOME. While the latter is used very rarely as it doesn't
matter a lot if it ends up within a tmpfs anyway. However if the cache
directory gets pretty large we might run out of space.

Not only do we now have proper fallbacks but this also adds tests for
all of the XDG environment variables we're using.

Signed-off-by: aszlig <aszlig@nix.build>

1 files changed, 17 insertions, 1 deletions

diff --git a/tests/sandbox.nix b/tests/sandbox.nix
index 9c247da2..9a1b4a3a 100644
--- a/tests/sandbox.nix
+++ b/tests/sandbox.nix
@@ -15,15 +15,27 @@
     environment.systemPackages = let
       testProgram = pkgs.writeScriptBin "test-sandbox" ''
         #!${pkgs.stdenv.shell} -ex
+
+        # Should fail because we can't access the host's PATH
         ! echo foo | grep -qF foo
+
         export PATH=/run/baz-test-sandbox/bin
         echo foo > /home/foo/existing/bar
         test ! -d /home/foo/nonexisting
         /run/foo-test-sandbox/bin/hello
         echo aaa | /run/bar-test-sandbox/bin/sed -e 's/a/b/g'
+
+        echo XDG1 > /home/foo/.local/share/xdg/1
+        echo XDG2 > /home/foo/.config/xdg/2
+        echo XDG3 > /home/foo/.cache/xdg/3
       '';
     in lib.singleton (pkgs.vuizvui.buildSandbox testProgram {
-      paths.required = [ "/home/foo/existing" ];
+      paths.required = [
+        "/home/foo/existing"
+        "$XDG_DATA_HOME/xdg"
+        "$XDG_CONFIG_HOME/xdg"
+        "$XDG_CACHE_HOME/xdg"
+      ];
       paths.wanted = [ "/home/foo/nonexisting" ];
       paths.runtimeVars = [ "COLLECT_ME" ];
     });
@@ -37,5 +49,9 @@
     $machine->succeed('test -d /home/foo/existing');
     $machine->succeed('grep -qF foo /home/foo/existing/bar');
     $machine->fail('test -d /home/foo/nonexisting');
+
+    $machine->succeed('grep -qF XDG1 /home/foo/.local/share/xdg/1');
+    $machine->succeed('grep -qF XDG2 /home/foo/.config/xdg/2');
+    $machine->succeed('grep -qF XDG3 /home/foo/.cache/xdg/3');
   '';
 }