From 404aeae4545d2426c089a5f8d5e82dae56f5212b Mon Sep 17 00:00:00 2001
From: Rutger Broekhoff
Date: Fri, 29 Dec 2023 21:31:53 +0100
Subject: Make Nix builds work

---
 vendor/github.com/minio/minio-go/v7/retry.go | 148 +++++++++++++++++++++++++++
 1 file changed, 148 insertions(+)
 create mode 100644 vendor/github.com/minio/minio-go/v7/retry.go

(limited to 'vendor/github.com/minio/minio-go/v7/retry.go')

diff --git a/vendor/github.com/minio/minio-go/v7/retry.go b/vendor/github.com/minio/minio-go/v7/retry.go
new file mode 100644
index 0000000..1c6105e
--- /dev/null
+++ b/vendor/github.com/minio/minio-go/v7/retry.go
@@ -0,0 +1,148 @@
+/*
+ * MinIO Go Library for Amazon S3 Compatible Cloud Storage
+ * Copyright 2015-2017 MinIO, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package minio
+
+import (
+	"context"
+	"crypto/x509"
+	"errors"
+	"net/http"
+	"net/url"
+	"time"
+)
+
+// MaxRetry is the maximum number of retries before stopping.
+var MaxRetry = 10
+
+// MaxJitter will randomize over the full exponential backoff time
+const MaxJitter = 1.0
+
+// NoJitter disables the use of jitter for randomizing the exponential backoff time
+const NoJitter = 0.0
+
+// DefaultRetryUnit - default unit multiplicative per retry.
+// defaults to 200 * time.Millisecond
+var DefaultRetryUnit = 200 * time.Millisecond
+
+// DefaultRetryCap - Each retry attempt never waits no longer than
+// this maximum time duration.
+var DefaultRetryCap = time.Second
+
+// newRetryTimer creates a timer with exponentially increasing
+// delays until the maximum retry attempts are reached.
+func (c *Client) newRetryTimer(ctx context.Context, maxRetry int, unit, cap time.Duration, jitter float64) <-chan int {
+	attemptCh := make(chan int)
+
+	// computes the exponential backoff duration according to
+	// https://www.awsarchitectureblog.com/2015/03/backoff.html
+	exponentialBackoffWait := func(attempt int) time.Duration {
+		// normalize jitter to the range [0, 1.0]
+		if jitter < NoJitter {
+			jitter = NoJitter
+		}
+		if jitter > MaxJitter {
+			jitter = MaxJitter
+		}
+
+		// sleep = random_between(0, min(cap, base * 2 ** attempt))
+		sleep := unit * time.Duration(1<<uint(attempt))
+		if sleep > cap {
+			sleep = cap
+		}
+		if jitter != NoJitter {
+			sleep -= time.Duration(c.random.Float64() * float64(sleep) * jitter)
+		}
+		return sleep
+	}
+
+	go func() {
+		defer close(attemptCh)
+		for i := 0; i < maxRetry; i++ {
+			select {
+			case attemptCh <- i + 1:
+			case <-ctx.Done():
+				return
+			}
+
+			select {
+			case <-time.After(exponentialBackoffWait(i)):
+			case <-ctx.Done():
+				return
+			}
+		}
+	}()
+	return attemptCh
+}
+
+// List of AWS S3 error codes which are retryable.
+var retryableS3Codes = map[string]struct{}{
+	"RequestError":          {},
+	"RequestTimeout":        {},
+	"Throttling":            {},
+	"ThrottlingException":   {},
+	"RequestLimitExceeded":  {},
+	"RequestThrottled":      {},
+	"InternalError":         {},
+	"ExpiredToken":          {},
+	"ExpiredTokenException": {},
+	"SlowDown":              {},
+	// Add more AWS S3 codes here.
+}
+
+// isS3CodeRetryable - is s3 error code retryable.
+func isS3CodeRetryable(s3Code string) (ok bool) {
+	_, ok = retryableS3Codes[s3Code]
+	return ok
+}
+
+// List of HTTP status codes which are retryable.
+var retryableHTTPStatusCodes = map[int]struct{}{
+	429:                            {}, // http.StatusTooManyRequests is not part of the Go 1.5 library, yet
+	499:                            {}, // client closed request, retry. A non-standard status code introduced by nginx.
+	http.StatusInternalServerError: {},
+	http.StatusBadGateway:          {},
+	http.StatusServiceUnavailable:  {},
+	http.StatusGatewayTimeout:      {},
+	// Add more HTTP status codes here.
+}
+
+// isHTTPStatusRetryable - is HTTP error code retryable.
+func isHTTPStatusRetryable(httpStatusCode int) (ok bool) {
+	_, ok = retryableHTTPStatusCodes[httpStatusCode]
+	return ok
+}
+
+// For now, all http Do() requests are retriable except some well defined errors
+func isRequestErrorRetryable(err error) bool {
+	if errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) {
+		return false
+	}
+	if ue, ok := err.(*url.Error); ok {
+		e := ue.Unwrap()
+		switch e.(type) {
+		// x509: certificate signed by unknown authority
+		case x509.UnknownAuthorityError:
+			return false
+		}
+		switch e.Error() {
+		case "http: server gave HTTP response to HTTPS client":
+			return false
+		}
+	}
+	return true
+}
-- 
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