Fix the CI...

.github/workflows/podman.yml

@@ -10,4 +10,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2.4.0
     - uses: cachix/install-nix-action@v15
-    - run: nix run -L '.#tests.all'
+    - run: |
+        # See https://github.com/containers/podman/issues/5114#issuecomment-779406347
+        rm -rf ~/.local/share/containers/
+        nix run -L '.#tests.all'

examples/nix.nix

@@ -17,6 +17,9 @@ nix2container.buildImage {
       # A user is required by nix
       # https://github.com/NixOS/nix/blob/9348f9291e5d9e4ba3c4347ea1b235640f54fd79/src/libutil/util.cc#L478
       "USER=nobody"
+      # When running in podman on the GitHub CI, Nix fails to find the
+      # user home dir for an unkonwn reason...
+      "HOME=/"
     ];
   };
   # This is to check store path in nested layers are also added to the

tests/default.nix

@@ -12,6 +12,9 @@ let
     ret=$?
     if [ $ret -ne 0 ];
     then
+      echo "image list"
+      ${pkgs.podman}/bin/podman image list
+      echo ""
       echo "Actual output:"
       ${pkgs.podman}/bin/podman run ${image.imageName}:${image.imageTag} ${command}
       echo
@@ -133,7 +136,10 @@ let
     };
   };
   all =
-    let scripts = pkgs.lib.concatMapStringsSep "\n" (s: "${s}/bin/test-script") (builtins.attrValues tests);
+    let scripts =
+      pkgs.lib.concatStringsSep
+      "\n"
+      (pkgs.lib.mapAttrsToList (n: v: "echo Running test '${n}'\n${v}/bin/test-script") tests);
     in pkgs.writeScriptBin "all-test-scripts" ''
       set -e
       ${scripts}