bump dependencies

vendor/github.com/jesseduffield/go-getter/detect_s3.go

@@ -0,0 +1,61 @@
+package getter
+
+import (
+	"fmt"
+	"net/url"
+	"strings"
+)
+
+// S3Detector implements Detector to detect S3 URLs and turn
+// them into URLs that the S3 getter can understand.
+type S3Detector struct{}
+
+func (d *S3Detector) Detect(src, _ string) (string, bool, error) {
+	if len(src) == 0 {
+		return "", false, nil
+	}
+
+	if strings.Contains(src, ".amazonaws.com/") {
+		return d.detectHTTP(src)
+	}
+
+	return "", false, nil
+}
+
+func (d *S3Detector) detectHTTP(src string) (string, bool, error) {
+	parts := strings.Split(src, "/")
+	if len(parts) < 2 {
+		return "", false, fmt.Errorf(
+			"URL is not a valid S3 URL")
+	}
+
+	hostParts := strings.Split(parts[0], ".")
+	if len(hostParts) == 3 {
+		return d.detectPathStyle(hostParts[0], parts[1:])
+	} else if len(hostParts) == 4 {
+		return d.detectVhostStyle(hostParts[1], hostParts[0], parts[1:])
+	} else {
+		return "", false, fmt.Errorf(
+			"URL is not a valid S3 URL")
+	}
+}
+
+func (d *S3Detector) detectPathStyle(region string, parts []string) (string, bool, error) {
+	urlStr := fmt.Sprintf("https://%s.amazonaws.com/%s", region, strings.Join(parts, "/"))
+	url, err := url.Parse(urlStr)
+	if err != nil {
+		return "", false, fmt.Errorf("error parsing S3 URL: %s", err)
+	}
+
+	return "s3::" + url.String(), true, nil
+}
+
+func (d *S3Detector) detectVhostStyle(region, bucket string, parts []string) (string, bool, error) {
+	urlStr := fmt.Sprintf("https://%s.amazonaws.com/%s/%s", region, bucket, strings.Join(parts, "/"))
+	url, err := url.Parse(urlStr)
+	if err != nil {
+		return "", false, fmt.Errorf("error parsing S3 URL: %s", err)
+	}
+
+	return "s3::" + url.String(), true, nil
+}