allow reuse-values on upgrade to be configurable

ct/cmd/install.go

@@ -82,6 +82,9 @@ func addInstallFlags(flags *flag.FlagSet) {
 		(e.g. "--set=name=value"`))
 	flags.Bool("skip-clean-up", false, heredoc.Doc(`
 		Skip resources clean-up. Used if need to continue other flows or keep it around.`))
+	flags.Bool("reuse-values", true, heredoc.Doc(`
+		Can be reset to disable adding the reuse-values flag for upgrades when
+		using the --upgrade flag.`))
 }
 
 func install(cmd *cobra.Command, args []string) error {

pkg/chart/chart.go

@@ -260,7 +260,7 @@ func NewTesting(config config.Configuration, extraSetArgs string) (Testing, erro
 
 	testing := Testing{
 		config:           config,
-		helm:             tool.NewHelm(procExec, extraArgs, strings.Fields(extraSetArgs)),
+		helm:             tool.NewHelm(procExec, extraArgs, strings.Fields(extraSetArgs), config.ReuseValues),
 		git:              tool.NewGit(procExec),
 		kubectl:          tool.NewKubectl(procExec, config.KubectlTimeout),
 		linter:           tool.NewLinter(procExec),

pkg/chart/integration_test.go

@@ -41,7 +41,7 @@ func newTestingHelmIntegration(cfg config.Configuration, extraSetArgs string) Te
 		utils:            util.Utils{},
 		accountValidator: fakeAccountValidator{},
 		linter:           fakeMockLinter,
-		helm:             tool.NewHelm(procExec, extraArgs, strings.Fields(extraSetArgs)),
+		helm:             tool.NewHelm(procExec, extraArgs, strings.Fields(extraSetArgs), cfg.ReuseValues),
 		kubectl:          tool.NewKubectl(procExec, 30*time.Second),
 	}
 }

pkg/config/config.go

@@ -71,6 +71,7 @@ type Configuration struct {
 	ExcludeDeprecated       bool          `mapstructure:"exclude-deprecated"`
 	KubectlTimeout          time.Duration `mapstructure:"kubectl-timeout"`
 	PrintLogs               bool          `mapstructure:"print-logs"`
+	ReuseValues             bool          `mapstructure:"reuse-values"`
 }
 
 func LoadConfiguration(cfgFile string, cmd *cobra.Command, printConfig bool) (*Configuration, error) {

pkg/tool/helm.go

@@ -24,13 +24,15 @@ type Helm struct {
 	exec         exec.ProcessExecutor
 	extraArgs    []string
 	extraSetArgs []string
+	reuseValues  bool
 }
 
-func NewHelm(exec exec.ProcessExecutor, extraArgs []string, extraSetArgs []string) Helm {
+func NewHelm(exec exec.ProcessExecutor, extraArgs []string, extraSetArgs []string, reuseValues bool) Helm {
 	return Helm{
 		exec:         exec,
 		extraArgs:    extraArgs,
 		extraSetArgs: extraSetArgs,
+		reuseValues:  reuseValues,
 	}
 }
 
@@ -70,8 +72,12 @@ func (h Helm) InstallWithValues(chart string, valuesFile string, namespace strin
 }
 
 func (h Helm) Upgrade(chart string, namespace string, release string) error {
+	var reuseValuesFlag string
+	if h.reuseValues {
+		reuseValuesFlag = "--reuse-values"
+	}
 	if err := h.exec.RunProcess("helm", "upgrade", release, chart, "--namespace", namespace,
-		"--reuse-values", "--wait", h.extraArgs, h.extraSetArgs); err != nil {
+		reuseValuesFlag, "--wait", h.extraArgs, h.extraSetArgs); err != nil {
 		return err
 	}