Prepare CLI loading for ConfigKit configuration

internal/cli/configkit_load_test.go

@@ -0,0 +1,52 @@
+package cli
+
+import (
+	"bytes"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	configkit "gitea.maximumdirect.net/eric/ConfigKit"
+)
+
+func TestLoadConfigKitUsesDiscoveryProfileAndOverrides(t *testing.T) {
+	t.Parallel()
+	root := t.TempDir()
+	path := filepath.Join(root, "notarius.yml")
+	writeConfigKitFile(t, path, "version: 5\npipelines:\n  base:\n    input: {module: input}\n")
+	profiles := filepath.Join(root, "profiles")
+	writeConfigKitFile(t, filepath.Join(profiles, "development.yml"), "pipelines:\n  profiled:\n    input: {module: input}\n")
+	loaded, gotPath, err := loadConfigKit(path, "development", []configkit.Override{{Path: configkit.Keys("output", "directory"), Value: "generated", Flag: "--output"}}, commandContractOptions(t))
+	if err != nil {
+		t.Fatalf("loadConfigKit() error = %v", err)
+	}
+	if gotPath != path || loaded.Config.Pipelines["profiled"].Input.Module != "input" || loaded.Config.Output.Directory == "generated" {
+		t.Fatalf("loaded = %#v, path=%q", loaded.Config, gotPath)
+	}
+}
+
+func TestWriteConfigLoadErrorUsesSafeDiagnostics(t *testing.T) {
+	t.Parallel()
+	path := filepath.Join(t.TempDir(), "invalid.yml")
+	writeConfigKitFile(t, path, "version: 4\n")
+	_, _, err := loadConfigKit(path, "", nil, commandContractOptions(t))
+	if err == nil {
+		t.Fatal("loadConfigKit() error = nil")
+	}
+	var output bytes.Buffer
+	writeConfigLoadError(&output, err)
+	if !strings.Contains(output.String(), "version") || strings.Contains(output.String(), "notarius: configkit") {
+		t.Fatalf("diagnostics = %q", output.String())
+	}
+}
+
+func writeConfigKitFile(t *testing.T, path, contents string) {
+	t.Helper()
+	if err := os.MkdirAll(filepath.Dir(path), 0o700); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(path, []byte(contents), 0o600); err != nil {
+		t.Fatal(err)
+	}
+}