Fix url; add changelog

CHANGELOG.md

@@ -5,6 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+
+- Fixed incorrect s3 url when "proxy" runs on uninitialized repository.
+[Refs: [#77](https://github.com/hypnoglow/helm-s3/issues/77) [#78](https://github.com/hypnoglow/helm-s3/pull/78)] [@horacimacias](https://github.com/horacimacias)
+
 ## [0.8.0]
 
 ### Added

cmd/helms3/proxy.go

@@ -27,7 +27,12 @@ func (act proxyCmd) Run(ctx context.Context) error {
 	b, err := storage.FetchRaw(ctx, act.uri)
 	if err != nil {
 		if strings.HasSuffix(act.uri, indexYaml) && err == awss3.ErrObjectNotFound {
-			return fmt.Errorf("The index file does not exist by the path %s. If you haven't initialized the repository yet, try running \"helm s3 init %s\"", act.uri, act.uri[0:len(indexYaml)])
+			return fmt.Errorf(
+				"The index file does not exist by the path %s. "+
+					"If you haven't initialized the repository yet, try running \"helm s3 init %s\"",
+				act.uri,
+				strings.TrimSuffix(strings.TrimSuffix(act.uri, indexYaml), "/"),
+			)
 		}
 		return errors.WithMessage(err, "fetch from s3")
 	}