treewide: replace hardcoded runfiles paths

We hardcoded some of the runfiles paths to find specific files. This replaces the hardcoded paths by a call to rlocationpath. This prevents running a target without the correct dependencies at build time instead of at runtime

Change-Id: I7ce56935ac80be6b28b824ccb0781ab401bd6521
Reviewed-on: https://review.monogon.dev/c/monogon/+/3301
Reviewed-by: Serge Bazanski <serge@monogon.tech>
Tested-by: Jenkins CI
diff --git a/metropolis/test/e2e/suites/kubernetes/BUILD.bazel b/metropolis/test/e2e/suites/kubernetes/BUILD.bazel
index 6234e94..302f3ac 100644
--- a/metropolis/test/e2e/suites/kubernetes/BUILD.bazel
+++ b/metropolis/test/e2e/suites/kubernetes/BUILD.bazel
@@ -20,9 +20,7 @@
     name = "kubernetes_test",
     srcs = ["run_test.go"],
     data = [
-        "//metropolis/node:image",
         "//metropolis/test/e2e:testimages_manifest",
-        "//third_party/edk2:firmware",
     ],
     embed = [":kubernetes"],
     tags = [
@@ -31,6 +29,9 @@
         # 2x2048 for nodes plus some extra.
         "resources:ram:4500",
     ],
+    x_defs = {
+        "xTestImagesManifestPath": "$(rlocationpath //metropolis/test/e2e:testimages_manifest )",
+    },
     deps = [
         "//metropolis/node",
         "//metropolis/test/launch",
diff --git a/metropolis/test/e2e/suites/kubernetes/run_test.go b/metropolis/test/e2e/suites/kubernetes/run_test.go
index f15fafd..3608c3c 100644
--- a/metropolis/test/e2e/suites/kubernetes/run_test.go
+++ b/metropolis/test/e2e/suites/kubernetes/run_test.go
@@ -30,6 +30,25 @@
 	common "source.monogon.dev/metropolis/node"
 )
 
+var (
+	// These are filled by bazel at linking time with the canonical path of
+	// their corresponding file. Inside the init function we resolve it
+	// with the rules_go runfiles package to the real path.
+	xTestImagesManifestPath string
+)
+
+func init() {
+	var err error
+	for _, path := range []*string{
+		&xTestImagesManifestPath,
+	} {
+		*path, err = runfiles.Rlocation(*path)
+		if err != nil {
+			panic(err)
+		}
+	}
+}
+
 const (
 	// Timeout for the global test context.
 	//
@@ -50,11 +69,7 @@
 	ctx, cancel := context.WithTimeout(context.Background(), globalTestTimeout)
 	defer cancel()
 
-	rPath, err := runfiles.Rlocation("_main/metropolis/test/e2e/testimages_manifest.prototxt")
-	if err != nil {
-		t.Fatalf("Resolving registry manifest failed: %v", err)
-	}
-	df, err := os.ReadFile(rPath)
+	df, err := os.ReadFile(xTestImagesManifestPath)
 	if err != nil {
 		t.Fatalf("Reading registry manifest failed: %v", err)
 	}