# Introduction

This document outlines how to make hotfix binaries and containers for MinIO?. The main focus in this article is about how to backport patches to a specific branch and finally building binaries/containers.

## Pre-pre requisite

- A working knowledge of MinIO codebase and its various components.
- A working knowledge of AWS S3 API behaviors and corner cases.

## Pre-requisite for backporting any fixes

		writer.payloadBufferIndex = 0
	}
	return result
}

// Finish is the last call to the message writer - it sends any
// remaining record payload, then sends statistics and finally the end
// message.
func (writer *messageWriter) Finish(bytesScanned, bytesProcessed int64) error {
	select {
	case <-writer.doneCh:
		return fmt.Errorf("messageWriter is done")
	default:

		// Check policy for parent user of service account.
		svcPolicies, err = sys.PolicyDBGet(parentUser, args.Groups...)
		if err != nil {
			iamLogIf(GlobalContext, err)
			return false
		}

		// Finally, if there is no parent policy, check if a policy claim is
		// present.
		if len(svcPolicies) == 0 {
			policySet, _ := policy.GetPoliciesFromClaims(args.Claims, iamPolicyClaimNameOpenID())

	return srv
}

// UseReadHeaderTimeout configure read header timeout
func (srv *Server) UseReadHeaderTimeout(d time.Duration) *Server {
	srv.ReadHeaderTimeout = d
	return srv
}

// UseHandler configure final handler for this HTTP *Server
func (srv *Server) UseHandler(h http.Handler) *Server {
	srv.Handler = h
	return srv
}

// UseTLSConfig pass configured TLSConfig for this HTTP *Server

			ObjectOptions{Versioned: testCase.versioned})
		if err != nil {
			t.Fatalf("Test %d: Failed to upload the final object: %v", i+1, err)
		}

		// Step 4: Try to read the object back and check its md5sum
		sets.erasureDisksMu.Lock()
		xl.getDisks = func() []StorageAPI { return origErasureDisks }

			partsMetadata[index].SetInlineData()
		}
		if opts.DataMovement {
			partsMetadata[index].SetDataMov()
		}
	}

	// Rename the successfully written temporary object to final location.
	onlineDisks, versions, oldDataDir, err := renameData(ctx, onlineDisks, minioMetaTmpBucket, tempObj, partsMetadata, bucket, object, writeQuorum)
	if err != nil {
		if errors.Is(err, errFileNotFound) {

	// Fill in Expires for presigned query.
	query.Set("Expires", strconv.FormatInt(epochExpires, 10))

	// Encode query and save.
	req.URL.RawQuery = query.Encode()

	// Save signature finally.
	req.URL.RawQuery += "&Signature=" + url.QueryEscape(signature)
	return nil
}

// Sign given request using Signature V2.
func signRequestV2(req *http.Request, accessKey, secretKey string) error {

		// server configuration, and convert it to minio-go's
		// replication configuration type (by converting to xml and
		// parsing it back), use minio-go's add rule function, and
		// finally convert it back to the server type (again via xml).
		// This is needed as there is no add-rule function in the server
		// yet.

		// Though we do not check if the rule already exists, this is

		if err != nil {
			continue
		}

		mrfRec, err = loadMRF(rc)
		if err != nil {
			continue
		}

		// finally delete the file after processing mrf entries
		localDrive.Delete(p.ctx, minioMetaBucket, pathJoin(replicationMRFDir, globalLocalNodeNameHex+".bin"), DeleteOptions{})
		break
	}

	return mrfRec, nil
}

		Cache:    &cache,
	})
	if err != nil {
		return cache, toStorageErr(err)
	}
	var final *dataUsageCache
	err = st.Results(func(resp *nsScannerResp) error {
		if resp.Update != nil {
			select {
			case <-ctx.Done():
			case updates <- *resp.Update:
			}
		}
		if resp.Final != nil {
			final = resp.Final
		}
		// We can't reuse the response since it is sent upstream.
		return nil
	})