feat: bootstrap control plane app skeleton

cmd/cli/main.go

@@ -0,0 +1,28 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"log"
+
+	"sub2api-cn-relay-manager/internal/config"
+)
+
+func main() {
+	if err := execute(context.Background(), log.Writer(), func(context.Context) (config.StartupConfig, error) {
+		return config.LoadStartupFromEnv()
+	}); err != nil {
+		log.Fatalf("run cli: %v", err)
+	}
+}
+
+func execute(ctx context.Context, output io.Writer, loadConfig func(context.Context) (config.StartupConfig, error)) error {
+	cfg, err := loadConfig(ctx)
+	if err != nil {
+		return err
+	}
+
+	_, err = fmt.Fprintf(output, "sub2api-cn-relay-manager cli ready\nlisten_addr=%s\nsqlite_dsn=%s\n", cfg.Server.ListenAddr, cfg.Database.SQLiteDSN)
+	return err
+}

cmd/cli/main_test.go

@@ -0,0 +1,79 @@
+package main
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"strings"
+	"testing"
+
+	"sub2api-cn-relay-manager/internal/config"
+)
+
+type errWriter struct {
+	err error
+}
+
+func (w errWriter) Write([]byte) (int, error) {
+	return 0, w.err
+}
+
+func TestExecuteWritesConfigSummaryAfterBootstrap(t *testing.T) {
+	var output bytes.Buffer
+	loadCalled := false
+
+	err := execute(context.Background(), &output, func(context.Context) (config.StartupConfig, error) {
+		loadCalled = true
+		return config.StartupConfig{
+			Server: config.ServerConfig{ListenAddr: ":9191"},
+			Database: config.DatabaseConfig{
+				SQLiteDSN: "file:test.db?_foreign_keys=on",
+			},
+		}, nil
+	})
+	if err != nil {
+		t.Fatalf("execute() returned error: %v", err)
+	}
+
+	if !loadCalled {
+		t.Fatal("execute() did not load config")
+	}
+
+	got := output.String()
+	if !strings.Contains(got, "sub2api-cn-relay-manager cli ready") {
+		t.Fatalf("execute() output = %q, want readiness line", got)
+	}
+
+	if !strings.Contains(got, "listen_addr=:9191") {
+		t.Fatalf("execute() output = %q, want listen addr summary", got)
+	}
+
+	if !strings.Contains(got, "sqlite_dsn=file:test.db?_foreign_keys=on") {
+		t.Fatalf("execute() output = %q, want sqlite dsn summary", got)
+	}
+}
+
+func TestExecuteReturnsBootstrapError(t *testing.T) {
+	wantErr := errors.New("load config failed")
+
+	err := execute(context.Background(), &bytes.Buffer{}, func(context.Context) (config.StartupConfig, error) {
+		return config.StartupConfig{}, wantErr
+	})
+	if !errors.Is(err, wantErr) {
+		t.Fatalf("execute() error = %v, want %v", err, wantErr)
+	}
+}
+
+func TestExecuteReturnsWriteError(t *testing.T) {
+	wantErr := errors.New("write failed")
+
+	err := execute(context.Background(), errWriter{err: wantErr}, func(context.Context) (config.StartupConfig, error) {
+		return config.StartupConfig{
+			Server:   config.ServerConfig{ListenAddr: ":9292"},
+			Database: config.DatabaseConfig{SQLiteDSN: "file:test.db"},
+		}, nil
+	})
+	if !errors.Is(err, wantErr) {
+		t.Fatalf("execute() error = %v, want %v", err, wantErr)
+	}
+}