feat: rewrite pipeline-bridge in Go

Replace Python implementation with Go for smaller container images.
Uses handler-base Go module for NATS, health, and telemetry.

- main.go: pipeline bridge with Argo/Kubeflow HTTP submission
- main_test.go: 8 tests covering helpers and HTTP submit functions
- Dockerfile: multi-stage golang:1.25-alpine → scratch
- CI: Gitea Actions with lint/test/release/docker/notify

main_test.go

@@ -0,0 +1,163 @@
+package main
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestStrVal(t *testing.T) {
+	m := map[string]any{"key": "value", "num": 42}
+	if got := strVal(m, "key", ""); got != "value" {
+		t.Errorf("strVal(key) = %q, want %q", got, "value")
+	}
+	if got := strVal(m, "missing", "default"); got != "default" {
+		t.Errorf("strVal(missing) = %q, want %q", got, "default")
+	}
+	if got := strVal(m, "num", "fallback"); got != "fallback" {
+		t.Errorf("strVal(num) = %q, want %q", got, "fallback")
+	}
+}
+
+func TestMapVal(t *testing.T) {
+	inner := map[string]any{"a": "b"}
+	m := map[string]any{"nested": inner, "scalar": "hi"}
+	got := mapVal(m, "nested")
+	if got["a"] != "b" {
+		t.Errorf("mapVal(nested) = %v, want {a:b}", got)
+	}
+	got2 := mapVal(m, "missing")
+	if len(got2) != 0 {
+		t.Errorf("mapVal(missing) should be empty, got %v", got2)
+	}
+	got3 := mapVal(m, "scalar")
+	if len(got3) != 0 {
+		t.Errorf("mapVal(scalar) should be empty, got %v", got3)
+	}
+}
+
+func TestGetEnv(t *testing.T) {
+	t.Setenv("TEST_HOST", "http://test:8080")
+	if got := getEnv("TEST_HOST", "fallback"); got != "http://test:8080" {
+		t.Errorf("getEnv(TEST_HOST) = %q, want %q", got, "http://test:8080")
+	}
+	if got := getEnv("MISSING_VAR_XYZ", "default"); got != "default" {
+		t.Errorf("getEnv(MISSING) = %q, want %q", got, "default")
+	}
+}
+
+func TestPipelinesMap(t *testing.T) {
+	expected := []string{"document-ingestion", "batch-inference", "rag-query", "voice-pipeline", "model-evaluation"}
+	for _, name := range expected {
+		if _, ok := pipelines[name]; !ok {
+			t.Errorf("pipeline %q not found in pipelines map", name)
+		}
+	}
+	if got := pipelines["document-ingestion"].Engine; got != "argo" {
+		t.Errorf("document-ingestion engine = %q, want argo", got)
+	}
+	if got := pipelines["rag-query"].Engine; got != "kubeflow" {
+		t.Errorf("rag-query engine = %q, want kubeflow", got)
+	}
+}
+
+func TestSubmitArgo(t *testing.T) {
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodPost {
+			t.Errorf("expected POST, got %s", r.Method)
+		}
+		if r.URL.Path != "/api/v1/workflows/ai-ml" {
+			t.Errorf("unexpected path: %s", r.URL.Path)
+		}
+		if r.Header.Get("Content-Type") != "application/json" {
+			t.Errorf("expected application/json content type")
+		}
+
+		var body map[string]any
+		if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
+			t.Errorf("failed to decode body: %v", err)
+		}
+		wf, ok := body["workflow"].(map[string]any)
+		if !ok {
+			t.Fatal("missing workflow key")
+		}
+		meta := wf["metadata"].(map[string]any)
+		if meta["namespace"] != "ai-ml" {
+			t.Errorf("unexpected namespace: %v", meta["namespace"])
+		}
+
+		w.Header().Set("Content-Type", "application/json")
+		json.NewEncoder(w).Encode(map[string]any{
+			"metadata": map[string]any{"name": "document-ingestion-abc123"},
+		})
+	}))
+	defer ts.Close()
+
+	ctx := t.Context()
+	runID, err := submitArgo(ctx, ts.Client(), ts.URL, "ai-ml", "document-ingestion", map[string]any{
+		"source": "test",
+	}, "req-001")
+	if err != nil {
+		t.Fatalf("submitArgo() error: %v", err)
+	}
+	if runID != "document-ingestion-abc123" {
+		t.Errorf("runID = %q, want %q", runID, "document-ingestion-abc123")
+	}
+}
+
+func TestSubmitArgoError(t *testing.T) {
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(`{"message":"bad request"}`))
+	}))
+	defer ts.Close()
+
+	ctx := t.Context()
+	_, err := submitArgo(ctx, ts.Client(), ts.URL, "ai-ml", "bad-template", nil, "req-err")
+	if err == nil {
+		t.Fatal("expected error for 400 response")
+	}
+}
+
+func TestSubmitKubeflow(t *testing.T) {
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodPost {
+			t.Errorf("expected POST, got %s", r.Method)
+		}
+		if r.URL.Path != "/apis/v1beta1/runs" {
+			t.Errorf("unexpected path: %s", r.URL.Path)
+		}
+
+		w.Header().Set("Content-Type", "application/json")
+		json.NewEncoder(w).Encode(map[string]any{
+			"run": map[string]any{"id": "kf-run-456"},
+		})
+	}))
+	defer ts.Close()
+
+	ctx := t.Context()
+	runID, err := submitKubeflow(ctx, ts.Client(), ts.URL, "rag-pipeline", map[string]any{
+		"query": "test",
+	}, "req-002")
+	if err != nil {
+		t.Fatalf("submitKubeflow() error: %v", err)
+	}
+	if runID != "kf-run-456" {
+		t.Errorf("runID = %q, want %q", runID, "kf-run-456")
+	}
+}
+
+func TestSubmitKubeflowError(t *testing.T) {
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusInternalServerError)
+		w.Write([]byte("internal error"))
+	}))
+	defer ts.Close()
+
+	ctx := t.Context()
+	_, err := submitKubeflow(ctx, ts.Client(), ts.URL, "bad-pipeline", nil, "req-err2")
+	if err == nil {
+		t.Fatal("expected error for 500 response")
+	}
+}