fix: absolute chart path (#753)

Resolves #743

pkg/state/util.go

@@ -1,6 +1,7 @@
 package state
 
 import (
+	"path/filepath"
 	"regexp"
 	"strings"
 )
@@ -38,3 +39,14 @@ func resolveRemoteChart(repoAndChart string) (string, string, bool) {
 
 	return repo, chart, true
 }
+
+// normalizeChart allows for the distinction between a file path reference and repository references.
+// - Any single (or double character) followed by a `/` will be considered a local file reference and
+// 	 be constructed relative to the `base path`.
+// - Everything else is assumed to be an absolute path or an actual <repository>/<chart> reference.
+func normalizeChart(basePath, chart string) string {
+	if !isLocalChart(chart) || chart[0] == '/' {
+		return chart
+	}
+	return filepath.Join(basePath, chart)
+}