feat: docker compose backup

internal/storage/s3.go

@@ -0,0 +1,78 @@
+package storage
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+	"time"
+
+	"github.com/aws/aws-sdk-go-v2/aws"
+	"github.com/aws/aws-sdk-go-v2/config"
+	"github.com/aws/aws-sdk-go-v2/credentials"
+	"github.com/aws/aws-sdk-go-v2/service/s3"
+
+	dcfg "git.misaka.ren/M1saka/docker_backup/internal/config"
+)
+
+// S3Backend uploads to S3-compatible storage.
+type S3Backend struct {
+	cfg    *dcfg.S3Config
+	client *s3.Client
+}
+
+// NewS3Backend creates a configured S3 backend.
+func NewS3Backend(cfg *dcfg.S3Config) (*S3Backend, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer cancel()
+
+	awsCfg, err := config.LoadDefaultConfig(ctx,
+		config.WithRegion(cfg.Region),
+		config.WithCredentialsProvider(
+			credentials.NewStaticCredentialsProvider(cfg.AccessKey, cfg.SecretKey, ""),
+		),
+	)
+	if err != nil {
+		return nil, fmt.Errorf("load aws config: %w", err)
+	}
+
+	s3Opts := func(o *s3.Options) {
+		if cfg.Endpoint != "" {
+			o.BaseEndpoint = aws.String(cfg.Endpoint)
+			o.UsePathStyle = true
+		}
+	}
+
+	return &S3Backend{
+		cfg:    cfg,
+		client: s3.NewFromConfig(awsCfg, s3Opts),
+	}, nil
+}
+
+// Upload implements Backend.
+func (s *S3Backend) Upload(ctx context.Context, projectName, localPath string) error {
+	file, err := os.Open(localPath)
+	if err != nil {
+		return fmt.Errorf("open: %w", err)
+	}
+	defer file.Close()
+
+	key := filepath.Base(localPath)
+	if s.cfg.PathPrefix != "" {
+		key = s.cfg.PathPrefix + projectName + "/" + key
+	} else {
+		key = projectName + "/" + key
+	}
+
+	_, err = s.client.PutObject(ctx, &s3.PutObjectInput{
+		Bucket:      aws.String(s.cfg.Bucket),
+		Key:         aws.String(key),
+		Body:        file,
+		ContentType: aws.String("application/gzip"),
+	})
+	if err != nil {
+		return fmt.Errorf("s3 put object: %w", err)
+	}
+
+	return nil
+}