Codevault initial commit

internal/runcmd/config_example.go

@@ -0,0 +1,59 @@
+package runcmd
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"time"
+
+	"gopkg.in/yaml.v3"
+
+	"github.com/kanootoko/codevault/internal/config"
+)
+
+func ConfigExample(configPath string) error {
+	configExample := config.Config{
+		Environment: config.DevelopmentEnvironment,
+		Server: config.ServerConfig{
+			Address: ":8080",
+			// Example: a Docker-network CIDR in front of a reverse proxy nginx.
+			// Replace with the actual proxy's IP/CIDR, or leave empty to trust
+			// no forwarded-for headers.
+			TrustedProxies: []string{"172.16.0.0/12"},
+		},
+		Database: config.DatabaseConfig{
+			Path: "./codevault.db",
+		},
+		RateLimit: config.RateLimitConfig{
+			MaxFailures: 10,
+			Window:      time.Minute,
+		},
+		Observability: config.ObservabilityConfig{
+			Logging: config.LoggingConfig{
+				Stderr: config.InfoLoggingLevel,
+				Files:  map[config.LoggingLevel]string{config.InfoLoggingLevel: "./info.log"},
+				Exporter: config.LogsExporterConfig{
+					Level:     config.InfoLoggingLevel,
+					Endpoint:  "http://127.0.0.1:4317/v1/logs",
+					Transport: "grpc",
+				},
+			},
+			Metrics: config.MetricsConfig{
+				Host: "127.0.0.1",
+				Port: 9092,
+			},
+		},
+	}
+	configBytesBuffer := bytes.NewBuffer(nil)
+	encoder := yaml.NewEncoder(configBytesBuffer)
+	encoder.SetIndent(2)
+	err := encoder.Encode(configExample)
+	if err != nil {
+		return fmt.Errorf("cannot marshal example config: %w", err)
+	}
+	err = os.WriteFile(configPath, configBytesBuffer.Bytes(), os.ModePerm)
+	if err != nil {
+		return fmt.Errorf("cannot write config file: %w", err)
+	}
+	return nil
+}