CopyIndexFile returns a deep copy of the provided index file.

HasVar takes a slice of values and value files and returns true if there is a variable with the provided name among them.

ParseChartFilename returns chart name and version from the provided chart package filename generated by ToChartFilename function below.

ToChartFilename returns a chart archive filename for the provided name/version.

Vals merges values from files specified via -f/--values and directly via --set or --set-string or --set-file, marshaling them to YAML.