Extend HelmChart to support helm --set-file

api/types/helmchartargs.go

@@ -63,6 +63,11 @@ type HelmChart struct {
 	// addition to either the default values file or the values specified in ValuesFile.
 	AdditionalValuesFiles []string `json:"additionalValuesFiles,omitempty" yaml:"additionalValuesFiles,omitempty"`
 
+	// AdditionalValuesFromFileContent holds value mappings where the value is
+	// specified in a file. This allows setting values from respective files.
+	// The file's content will become the value's content.
+	AdditionalValuesFromFileContent map[string]string `json:"additionalValuesFromFileContent,omitempty" yaml:"additionalValuesFromFileContent,omitempty"`
+
 	// ValuesFile is a local file path to a values file to use _instead of_
 	// the default values that accompanied the chart.
 	// The default values are in '{ChartHome}/{Name}/values.yaml'.
@@ -168,6 +173,9 @@ func (h HelmChart) AsHelmArgs(absChartHome string) []string {
 	for _, valuesFile := range h.AdditionalValuesFiles {
 		args = append(args, "-f", valuesFile)
 	}
+	for key, file := range h.AdditionalValuesFromFileContent {
+		args = append(args, "--set-file", key+"="+file)
+	}
 
 	for _, apiVer := range h.ApiVersions {
 		args = append(args, "--api-versions", apiVer)

plugin/builtin/helmchartinflationgenerator/HelmChartInflationGenerator.go

@@ -107,6 +107,14 @@ func (p *plugin) validateArgs() (err error) {
 		// the additional values filepaths must be relative to the kust root
 		p.AdditionalValuesFiles[i] = filepath.Join(p.h.Loader().Root(), file)
 	}
+	for key, file := range p.AdditionalValuesFromFileContent {
+		// use Load() to enforce root restrictions
+		if _, err := p.h.Loader().Load(file); err != nil {
+			return errors.WrapPrefixf(err, "could not load file specified in AdditionalValuesFromFileContent")
+		}
+		// the filepaths must be relative to the kust root
+		p.AdditionalValuesFromFileContent[key] = filepath.Join(p.h.Loader().Root(), file)
+	}
 
 	if err = p.errIfIllegalValuesMerge(); err != nil {
 		return err