Fix for relative chart path support in index.yaml

pkg/downloader/chart_downloader.go

@@ -217,12 +217,15 @@ func (c *ChartDownloader) ResolveChartVersion(ref, version string) (*url.URL, ge
 
 	// If the URL is relative (no scheme), prepend the chart repo's base URL
 	if !u.IsAbs() {
-		path := u.Path
-		u, err = url.Parse(rc.URL)
+		repoURL, err := url.Parse(rc.URL)
 		if err != nil {
-			return u, r.Client, err
+			return repoURL, r.Client, err
 		}
-		u.Path = u.Path + path
+		q := repoURL.Query()
+		// We need a trailing slash for ResolveReference to work, but make sure there isn't already one
+		repoURL.Path = strings.TrimSuffix(repoURL.Path, "/") + "/"
+		u = repoURL.ResolveReference(u)
+		u.RawQuery = q.Encode()
 		return u, r.Client, err
 	}
 

pkg/downloader/chart_downloader_test.go

@@ -44,6 +44,10 @@ func TestResolveChartRef(t *testing.T) {
 		{name: "reference, version, testing repo", ref: "testing/alpine", version: "0.2.0", expect: "http://example.com/alpine-0.2.0.tgz"},
 		{name: "reference, version, malformed repo", ref: "malformed/alpine", version: "1.2.3", expect: "http://dl.example.com/alpine-1.2.3.tgz"},
 		{name: "reference, querystring repo", ref: "testing-querystring/alpine", expect: "http://example.com/alpine-1.2.3.tgz?key=value"},
+		{name: "reference, testing-relative repo", ref: "testing-relative/foo", expect: "http://example.com/helm/charts/foo-1.2.3.tgz"},
+		{name: "reference, testing-relative repo", ref: "testing-relative/bar", expect: "http://example.com/helm/bar-1.2.3.tgz"},
+		{name: "reference, testing-relative-trailing-slash repo", ref: "testing-relative-trailing-slash/foo", expect: "http://example.com/helm/charts/foo-1.2.3.tgz"},
+		{name: "reference, testing-relative-trailing-slash repo", ref: "testing-relative-trailing-slash/bar", expect: "http://example.com/helm/bar-1.2.3.tgz"},
 		{name: "full URL, HTTPS, irrelevant version", ref: "https://example.com/foo-1.2.3.tgz", version: "0.1.0", expect: "https://example.com/foo-1.2.3.tgz", fail: true},
 		{name: "full URL, file", ref: "file:///foo-1.2.3.tgz", fail: true},
 		{name: "invalid", ref: "invalid-1.2.3", fail: true},

pkg/downloader/testdata/helmhome/repository/cache/testing-relative-index.yaml

@@ -0,0 +1,28 @@
+apiVersion: v1
+entries:
+  foo:
+    - name: foo
+      description: Foo Chart With Relative Path
+      engine: gotpl
+      home: https://k8s.io/helm
+      keywords: []
+      maintainers: []
+      sources:
+        - https://github.com/kubernetes/charts
+      urls:
+        - charts/foo-1.2.3.tgz
+      version: 1.2.3
+      checksum: 0e6661f193211d7a5206918d42f5c2a9470b737d
+  bar:
+    - name: bar
+      description: Bar Chart With Relative Path
+      engine: gotpl
+      home: https://k8s.io/helm
+      keywords: []
+      maintainers: []
+      sources:
+        - https://github.com/kubernetes/charts
+      urls:
+        - bar-1.2.3.tgz
+      version: 1.2.3
+      checksum: 0e6661f193211d7a5206918d42f5c2a9470b737d

pkg/downloader/testdata/helmhome/repository/cache/testing-relative-trailing-slash-index.yaml

@@ -0,0 +1,28 @@
+apiVersion: v1
+entries:
+  foo:
+    - name: foo
+      description: Foo Chart With Relative Path
+      engine: gotpl
+      home: https://k8s.io/helm
+      keywords: []
+      maintainers: []
+      sources:
+        - https://github.com/kubernetes/charts
+      urls:
+        - charts/foo-1.2.3.tgz
+      version: 1.2.3
+      checksum: 0e6661f193211d7a5206918d42f5c2a9470b737d
+  bar:
+    - name: bar
+      description: Bar Chart With Relative Path
+      engine: gotpl
+      home: https://k8s.io/helm
+      keywords: []
+      maintainers: []
+      sources:
+        - https://github.com/kubernetes/charts
+      urls:
+        - bar-1.2.3.tgz
+      version: 1.2.3
+      checksum: 0e6661f193211d7a5206918d42f5c2a9470b737d

pkg/downloader/testdata/helmhome/repository/repositories.yaml

@@ -11,4 +11,8 @@ repositories:
   - name: malformed
     url: "http://dl.example.com"
   - name: testing-querystring
-    url: "http://example.com?key=value"
+    url: "http://example.com?key=value"
+  - name: testing-relative
+    url: "http://example.com/helm"
+  - name: testing-relative-trailing-slash
+    url: "http://example.com/helm/"