tracee: add manual nixosTest for integration testing

pkgs/tools/security/tracee/skip-init-test.patch

@@ -0,0 +1,12 @@
+diff --git a/tests/integration/integration_test.go b/tests/integration/integration_test.go
+index 8601eb9..57088d2 100644
+--- a/tests/integration/integration_test.go
++++ b/tests/integration/integration_test.go
+@@ -149,6 +149,7 @@ func checkUidzero(t *testing.T, gotOutput *bytes.Buffer) {
+ 
+ // only capture pids of 1
+ func checkPidOne(t *testing.T, gotOutput *bytes.Buffer) {
++    t.Skip("Not compatible with systemd init")
+ 	_, _ = exec.Command("init", "q").CombinedOutput()
+ 
+ 	waitForTraceeOutput(gotOutput, time.Now())

pkgs/tools/security/tracee/skip-magic_write-test.patch

@@ -0,0 +1,12 @@
+diff --git a/tests/integration/integration_test.go b/tests/integration/integration_test.go
+index 8601eb9..a8a3eed 100644
+--- a/tests/integration/integration_test.go
++++ b/tests/integration/integration_test.go
+@@ -75,6 +75,7 @@ func waitForTraceeOutput(gotOutput *bytes.Buffer, now time.Time) {
+ 
+ // small set of actions to trigger a magic write event
+ func checkMagicwrite(t *testing.T, gotOutput *bytes.Buffer) {
++    t.Skip()
+ 	// create a temp dir for testing
+ 	d, err := ioutil.TempDir("", "Test_MagicWrite-dir-*")
+ 	require.NoError(t, err)

pkgs/tools/security/tracee/test.nix

@@ -0,0 +1,41 @@
+{ pkgs ? import ../../../../. { } }:
+
+# manually run `nix-build ./pkgs/tools/security/tracee/test.nix` to test
+pkgs.nixosTest ({
+  name = "tracee-test";
+  nodes = {
+    machine = { config, pkgs, ... }: {
+      environment.systemPackages = [
+        pkgs.tracee
+        # build the go integration tests as a binary
+        (pkgs.tracee.overrideAttrs (oa: {
+          pname = oa.pname + "-integration";
+          patches = oa.patches or [] ++ [
+            # skip test that runs `init -q` which is incompatible with systemd init
+            ./skip-init-test.patch
+            # skip magic_write test that currently fails
+            ./skip-magic_write-test.patch
+          ];
+          # just build the static lib we need for the go test binary
+          makeFlags = oa.makeFlags ++ [ "./dist/libbpf/libbpf.a" ];
+          postBuild = ''
+            # by default the tests are disabled and this is intended to be commented out
+            sed -i '/t.Skip("This test requires root privileges")/d' ./tests/integration/integration_test.go
+            CGO_CFLAGS="-I$PWD/dist/libbpf" CGO_LDFLAGS="-lelf -lz $PWD/dist/libbpf/libbpf.a" go test -tags ebpf,integration -c -o $GOPATH/tracee-integration ./tests/integration
+          '';
+          doCheck = false;
+          installPhase = ''
+            mkdir -p $out/bin
+            cp $GOPATH/tracee-integration $out/bin
+          '';
+          doInstallCheck = false;
+        }))
+      ];
+    };
+  };
+
+  testScript = ''
+    with subtest("run integration tests"):
+      print(machine.succeed('TRC_BIN="$(which tracee-ebpf)" tracee-integration -test.v -test.run "Test_Events"'))
+  '';
+})