depot/nixos/tests/darling-dmg.nix

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{ lib, pkgs, ... }:
# This needs to be a VM test because the FUSE kernel module can't be used inside of a derivation in the Nix sandbox.
# This test also exercises the LZFSE support in darling-dmg.
let
# The last kitty release which is stored on an HFS+ filesystem inside the disk image
test-dmg-file = pkgs.fetchurl {
url = "https://github.com/kovidgoyal/kitty/releases/download/v0.17.4/kitty-0.17.4.dmg";
hash = "sha256-m+c5s8fFrgUc0xQNI196WplYBZq9+lNgems5haZUdvA=";
};
in
{
name = "darling-dmg";
meta.maintainers = with lib.maintainers; [ Luflosi ];
nodes.machine = {};
testScript = ''
start_all()
machine.succeed("mkdir mount-point")
machine.succeed("'${pkgs.darling-dmg}/bin/darling-dmg' '${test-dmg-file}' mount-point")
# Crude way to verify the contents
# Taken from https://stackoverflow.com/questions/545387/linux-compute-a-single-hash-for-a-given-folder-contents
# This could be improved. It does not check symlinks for example.
hash = machine.succeed("""
(find mount-point -type f -print0 | sort -z | xargs -0 sha256sum; \
find mount-point \( -type f -o -type d \) -print0 | sort -z | \
xargs -0 stat -c '%n %a') \
| sha256sum
""").strip()
assert hash == "00e61c2ef171093fbf194e420c17bb84bcdb823238d70eb46e375bab2427cc21 -", f"The disk image contents differ from what was expected (was {hash})"
'';
}