fix: helm chart referenced by http URL (#695)

We unintentionally broke this since #593.

Fixes #675
Fixes #687

pkg/state/chart_dependency.go

@@ -128,21 +128,6 @@ func (d *ResolvedDependencies) Get(chart, versionConstraint string) (string, err
 	return "", fmt.Errorf("no resolved dependency found for \"%s\"", chart)
 }
 
-func resolveRemoteChart(repoAndChart string) (string, string, bool) {
-	parts := strings.Split(repoAndChart, "/")
-	if isLocalChart(repoAndChart) {
-		return "", "", false
-	}
-	if len(parts) != 2 {
-		panic(fmt.Sprintf("unsupported format of chart name: %s", repoAndChart))
-	}
-
-	repo := parts[0]
-	chart := parts[1]
-
-	return repo, chart, true
-}
-
 func (st *HelmState) mergeLockedDependencies() (*HelmState, error) {
 	filename, unresolved, err := getUnresolvedDependenciess(st)
 	if err != nil {

pkg/state/state.go

@@ -1073,17 +1073,6 @@ func normalizeChart(basePath, chart string) string {
 	}
 	return filepath.Join(basePath, chart)
 }
-
-func isLocalChart(chart string) bool {
-	regex, _ := regexp.Compile("^[.]?./")
-	matched := regex.MatchString(chart)
-	if matched {
-		return true
-	}
-
-	return chart == "" || chart[0] == '/' || len(strings.Split(chart, "/")) != 2
-}
-
 func pathExists(chart string) bool {
 	_, err := os.Stat(chart)
 	return err == nil

pkg/state/util.go

@@ -0,0 +1,40 @@
+package state
+
+import (
+	"regexp"
+	"strings"
+)
+
+func isLocalChart(chart string) bool {
+	regex, _ := regexp.Compile("^[.]?./")
+	matched := regex.MatchString(chart)
+	if matched {
+		return true
+	}
+
+	uriLike := strings.Index(chart, "://") > -1
+	if uriLike {
+		return false
+	}
+
+	return chart == "" ||
+		chart[0] == '/' ||
+		strings.Index(chart, "/") == -1 ||
+		len(strings.Split(chart, "/")) != 2
+}
+
+func resolveRemoteChart(repoAndChart string) (string, string, bool) {
+	if isLocalChart(repoAndChart) {
+		return "", "", false
+	}
+
+	parts := strings.Split(repoAndChart, "/")
+	if len(parts) != 2 {
+		return "", "", false
+	}
+
+	repo := parts[0]
+	chart := parts[1]
+
+	return repo, chart, true
+}

pkg/state/util_test.go

@@ -0,0 +1,113 @@
+package state
+
+import "testing"
+
+func TestIsLocalChart(t *testing.T) {
+	testcases := []struct {
+		input    string
+		expected bool
+	}{
+		{
+			input:    "mychart",
+			expected: true,
+		},
+		{
+			input:    "stable/mysql",
+			expected: false,
+		},
+		{
+			input:    "./charts/myapp",
+			expected: true,
+		},
+		{
+			input:    "charts/mysubsystem/myapp",
+			expected: true,
+		},
+		{
+			input:    "./charts/mysubsystem/myapp",
+			expected: true,
+		},
+		{
+			// Regression test case for:
+			// * https://github.com/roboll/helmfile/issues/675
+			// * https://github.com/roboll/helmfile/issues/687
+			input:    "https://github.com/arangodb/kube-arangodb/releases/download/0.3.11/kube-arangodb-crd.tgz",
+			expected: false,
+		},
+		{
+			input:    "https://example.com/bar.tgz",
+			expected: false,
+		},
+	}
+
+	for i := range testcases {
+		testcase := testcases[i]
+
+		actual := isLocalChart(testcase.input)
+
+		if testcase.expected != actual {
+			t.Errorf("unexpected result: isLocalChart(\"%s\"): expected=%v, got=%v", testcase.input, testcase.expected, actual)
+		}
+	}
+}
+
+func TestResolveRemortChart(t *testing.T) {
+	testcases := []struct {
+		input  string
+		repo   string
+		chart  string
+		remote bool
+	}{
+		{
+			input:  "mychart",
+			remote: false,
+		},
+		{
+			input:  "stable/mysql",
+			repo:   "stable",
+			chart:  "mysql",
+			remote: true,
+		},
+		{
+			input:  "./charts/myapp",
+			remote: false,
+		},
+		{
+			input:  "charts/mysubsystem/myapp",
+			remote: false,
+		},
+		{
+			input:  "./charts/mysubsystem/myapp",
+			remote: false,
+		},
+		{
+			// Regression test case for:
+			// * https://github.com/roboll/helmfile/issues/675
+			// * https://github.com/roboll/helmfile/issues/687
+			input:  "https://github.com/arangodb/kube-arangodb/releases/download/0.3.11/kube-arangodb-crd.tgz",
+			remote: false,
+		},
+		{
+			input:  "https://example.com/bar.tgz",
+			remote: false,
+		},
+	}
+
+	for i := range testcases {
+		testcase := testcases[i]
+
+		repo, chart, actual := resolveRemoteChart(testcase.input)
+
+		if testcase.remote != actual {
+			t.Fatalf("unexpected result: reolveRemoteChart(\"%s\"): expected=%v, got=%v", testcase.input, testcase.remote, actual)
+		}
+
+		if testcase.repo != repo {
+			t.Errorf("unexpected repo: %s: expected=%v, got=%v", testcase.input, testcase.repo, repo)
+		}
+
+		if testcase.chart != chart {
+			t.Errorf("unexpected chart: %s: expected=%v, got=%v", testcase.input, testcase.chart, chart)
+		}
+	}
+}