"""Macros for working with Helm Charts"""

def helm_template(name, chart, release_name, namespace = "", values_yaml = ""):
    """Returns a genrule for rendering a Helm Chart into a set of templates

    Provides single multidoc as result that can be handed to k8s_object.
    """

    values_flag = "" if values_yaml == "" else "-f $(location " + values_yaml + ")"
    namespace_flag = "" if namespace == "" else "--namespace " + namespace

    native.genrule(
        name = name,
        # only add values_yaml if its provided
        srcs = [chart] if values_yaml == "" else [chart, values_yaml],
        tools = ["//hack/tools:helm"],
        outs = [release_name + "_manifests.yaml"],
        cmd = "$(location //hack/tools:helm) template --include-crds " + release_name + " $(location " + chart + ") " + values_flag + " " + namespace_flag + "> \"$@\"",
    )