Merge pull request #73 from pelotech/godiomaticity

More-idiomatic initialization of Steps

cmd/drone-helm/main.go

@@ -5,11 +5,12 @@ import (
 	"os"
 
 	_ "github.com/joho/godotenv/autoload"
+	"github.com/pelotech/drone-helm3/internal/env"
 	"github.com/pelotech/drone-helm3/internal/helm"
 )
 
 func main() {
-	cfg, err := helm.NewConfig(os.Stdout, os.Stderr)
+	cfg, err := env.NewConfig(os.Stdout, os.Stderr)
 
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "%s\n", err.Error())

docs/parameter_reference.md

@@ -6,6 +6,7 @@
 | mode                | string          | helm_command | Indicates the operation to perform. Recommended, but not required. Valid options are `upgrade`, `uninstall`, `lint`, and `help`. |
 | update_dependencies | boolean         |              | Calls `helm dependency update` before running the main command.|
 | add_repos           | list\<string\>  | helm_repos   | Calls `helm repo add $repo` before running the main command. Each string should be formatted as `repo_name=https://repo.url/`. |
+| repo_ca_file        | string          |              | TLS certificate for a chart repository certificate authority. |
 | namespace           | string          |              | Kubernetes namespace to use for this operation. |
 | debug               | boolean         |              | Generate debug output within drone-helm3 and pass `--debug` to all helm commands. Use with care, since the debug output may include secrets. |
 

internal/env/config.go

@@ -1,4 +1,4 @@
-package helm
+package env
 
 import (
 	"fmt"
@@ -21,16 +21,17 @@ var (
 type Config struct {
 	// Configuration for drone-helm itself
 	Command            string   `envconfig:"mode"`                   // Helm command to run
-	DroneEvent         string   `envconfig:"DRONE_BUILD_EVENT"`      // Drone event that invoked this plugin.
+	DroneEvent         string   `envconfig:"drone_build_event"`      // Drone event that invoked this plugin.
 	UpdateDependencies bool     `split_words:"true"`                 // Call `helm dependency update` before the main command
 	AddRepos           []string `split_words:"true"`                 // Call `helm repo add` before the main command
+	RepoCAFile         string   `envconfig:"repo_ca_file"`           // CA certificate for `helm repo add`
 	Debug              bool     ``                                   // Generate debug output and pass --debug to all helm commands
 	Values             string   ``                                   // Argument to pass to --set in applicable helm commands
 	StringValues       string   `split_words:"true"`                 // Argument to pass to --set-string in applicable helm commands
 	ValuesFiles        []string `split_words:"true"`                 // Arguments to pass to --values in applicable helm commands
 	Namespace          string   ``                                   // Kubernetes namespace for all helm commands
 	KubeToken          string   `split_words:"true"`                 // Kubernetes authentication token to put in .kube/config
-	SkipTLSVerify      bool     `envconfig:"SKIP_TLS_VERIFY"`        // Put insecure-skip-tls-verify in .kube/config
+	SkipTLSVerify      bool     `envconfig:"skip_tls_verify"`        // Put insecure-skip-tls-verify in .kube/config
 	Certificate        string   `envconfig:"kube_certificate"`       // The Kubernetes cluster CA's self-signed certificate (must be base64-encoded)
 	APIServer          string   `envconfig:"kube_api_server"`        // The Kubernetes cluster's API endpoint
 	ServiceAccount     string   `envconfig:"kube_service_account"`   // Account to use for connecting to the Kubernetes cluster
@@ -44,7 +45,7 @@ type Config struct {
 	Release            string   ``                                   // Release argument to use in applicable helm commands
 	Force              bool     `envconfig:"force_upgrade"`          // Pass --force to applicable helm commands
 	AtomicUpgrade      bool     `split_words:"true"`                 // Pass --atomic to `helm upgrade`
-	CleanupOnFail      bool     `envconfig:"CLEANUP_FAILED_UPGRADE"` // Pass --cleanup-on-fail to `helm upgrade`
+	CleanupOnFail      bool     `envconfig:"cleanup_failed_upgrade"` // Pass --cleanup-on-fail to `helm upgrade`
 	LintStrictly       bool     `split_words:"true"`                 // Pass --strict to `helm lint`
 
 	Stdout io.Writer `ignored:"true"`

internal/env/config_test.go

@@ -1,4 +1,4 @@
-package helm
+package env
 
 import (
 	"fmt"

internal/helm/mock_step_test.go

@@ -6,7 +6,6 @@ package helm
 
 import (
 	gomock "github.com/golang/mock/gomock"
-	run "github.com/pelotech/drone-helm3/internal/run"
 	reflect "reflect"
 )
 
@@ -34,29 +33,29 @@ func (m *MockStep) EXPECT() *MockStepMockRecorder {
 }
 
 // Prepare mocks base method
-func (m *MockStep) Prepare(arg0 run.Config) error {
+func (m *MockStep) Prepare() error {
 	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "Prepare", arg0)
+	ret := m.ctrl.Call(m, "Prepare")
 	ret0, _ := ret[0].(error)
 	return ret0
 }
 
 // Prepare indicates an expected call of Prepare
-func (mr *MockStepMockRecorder) Prepare(arg0 interface{}) *gomock.Call {
+func (mr *MockStepMockRecorder) Prepare() *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Prepare", reflect.TypeOf((*MockStep)(nil).Prepare), arg0)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Prepare", reflect.TypeOf((*MockStep)(nil).Prepare))
 }
 
 // Execute mocks base method
-func (m *MockStep) Execute(arg0 run.Config) error {
+func (m *MockStep) Execute() error {
 	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "Execute", arg0)
+	ret := m.ctrl.Call(m, "Execute")
 	ret0, _ := ret[0].(error)
 	return ret0
 }
 
 // Execute indicates an expected call of Execute
-func (mr *MockStepMockRecorder) Execute(arg0 interface{}) *gomock.Call {
+func (mr *MockStepMockRecorder) Execute() *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Execute", reflect.TypeOf((*MockStep)(nil).Execute), arg0)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Execute", reflect.TypeOf((*MockStep)(nil).Execute))
 }

internal/helm/plan.go

@@ -2,6 +2,7 @@ package helm
 
 import (
 	"fmt"
+	"github.com/pelotech/drone-helm3/internal/env"
 	"github.com/pelotech/drone-helm3/internal/run"
 	"os"
 )
@@ -13,27 +14,20 @@ const (
 
 // A Step is one step in the plan.
 type Step interface {
-	Prepare(run.Config) error
-	Execute(run.Config) error
+	Prepare() error
+	Execute() error
 }
 
 // A Plan is a series of steps to perform.
 type Plan struct {
 	steps []Step
-	cfg    Config
-	runCfg run.Config
+	cfg   env.Config
 }
 
 // NewPlan makes a plan for running a helm operation.
-func NewPlan(cfg Config) (*Plan, error) {
+func NewPlan(cfg env.Config) (*Plan, error) {
 	p := Plan{
 		cfg: cfg,
-		runCfg: run.Config{
-			Debug:     cfg.Debug,
-			Namespace: cfg.Namespace,
-			Stdout:    cfg.Stdout,
-			Stderr:    cfg.Stderr,
-		},
 	}
 
 	p.steps = (*determineSteps(cfg))(cfg)
@@ -43,7 +37,7 @@ func NewPlan(cfg Config) (*Plan, error) {
 			fmt.Fprintf(os.Stderr, "calling %T.Prepare (step %d)\n", step, i)
 		}
 
-		if err := step.Prepare(p.runCfg); err != nil {
+		if err := step.Prepare(); err != nil {
 			err = fmt.Errorf("while preparing %T step: %w", step, err)
 			return nil, err
 		}
@@ -54,7 +48,7 @@ func NewPlan(cfg Config) (*Plan, error) {
 
 // determineSteps is primarily for the tests' convenience: it allows testing the "which stuff should
 // we do" logic without building a config that meets all the steps' requirements.
-func determineSteps(cfg Config) *func(Config) []Step {
+func determineSteps(cfg env.Config) *func(env.Config) []Step {
 	switch cfg.Command {
 	case "upgrade":
 		return &upgrade
@@ -83,7 +77,7 @@ func (p *Plan) Execute() error {
 			fmt.Fprintf(p.cfg.Stderr, "calling %T.Execute (step %d)\n", step, i)
 		}
 
-		if err := step.Execute(p.runCfg); err != nil {
+		if err := step.Execute(); err != nil {
 			return fmt.Errorf("while executing %T step: %w", step, err)
 		}
 	}
@@ -91,97 +85,43 @@ func (p *Plan) Execute() error {
 	return nil
 }
 
-var upgrade = func(cfg Config) []Step {
-	steps := initKube(cfg)
-	steps = append(steps, addRepos(cfg)...)
-	if cfg.UpdateDependencies {
-		steps = append(steps, depUpdate(cfg)...)
-	}
-	steps = append(steps, &run.Upgrade{
-		Chart:         cfg.Chart,
-		Release:       cfg.Release,
-		ChartVersion:  cfg.ChartVersion,
-		DryRun:        cfg.DryRun,
-		Wait:          cfg.Wait,
-		Values:        cfg.Values,
-		StringValues:  cfg.StringValues,
-		ValuesFiles:   cfg.ValuesFiles,
-		ReuseValues:   cfg.ReuseValues,
-		Timeout:       cfg.Timeout,
-		Force:         cfg.Force,
-		Atomic:        cfg.AtomicUpgrade,
-		CleanupOnFail: cfg.CleanupOnFail,
-	})
-
-	return steps
-}
-
-var uninstall = func(cfg Config) []Step {
-	steps := initKube(cfg)
-	if cfg.UpdateDependencies {
-		steps = append(steps, depUpdate(cfg)...)
-	}
-	steps = append(steps, &run.Uninstall{
-		Release:     cfg.Release,
-		DryRun:      cfg.DryRun,
-		KeepHistory: cfg.KeepHistory,
-	})
-
-	return steps
-}
-
-var lint = func(cfg Config) []Step {
-	steps := addRepos(cfg)
-	if cfg.UpdateDependencies {
-		steps = append(steps, depUpdate(cfg)...)
-	}
-	steps = append(steps, &run.Lint{
-		Chart:        cfg.Chart,
-		Values:       cfg.Values,
-		StringValues: cfg.StringValues,
-		ValuesFiles:  cfg.ValuesFiles,
-		Strict:       cfg.LintStrictly,
-	})
-
-	return steps
-}
-
-var help = func(cfg Config) []Step {
-	help := &run.Help{
-		HelmCommand: cfg.Command,
-	}
-	return []Step{help}
-}
-
-func initKube(cfg Config) []Step {
-	return []Step{
-		&run.InitKube{
-			SkipTLSVerify:  cfg.SkipTLSVerify,
-			Certificate:    cfg.Certificate,
-			APIServer:      cfg.APIServer,
-			ServiceAccount: cfg.ServiceAccount,
-			Token:          cfg.KubeToken,
-			TemplateFile:   kubeConfigTemplate,
-			ConfigFile:     kubeConfigFile,
-		},
-	}
-}
-
-func addRepos(cfg Config) []Step {
-	steps := make([]Step, 0)
+var upgrade = func(cfg env.Config) []Step {
+	var steps []Step
+	steps = append(steps, run.NewInitKube(cfg, kubeConfigTemplate, kubeConfigFile))
 	for _, repo := range cfg.AddRepos {
-		steps = append(steps, &run.AddRepo{
-			Repo: repo,
-		})
+		steps = append(steps, run.NewAddRepo(cfg, repo))
 	}
+	if cfg.UpdateDependencies {
+		steps = append(steps, run.NewDepUpdate(cfg))
+	}
+	steps = append(steps, run.NewUpgrade(cfg))
 
 	return steps
 }
 
-func depUpdate(cfg Config) []Step {
-	return []Step{
-		&run.DepUpdate{
-			Chart: cfg.Chart,
-		},
+var uninstall = func(cfg env.Config) []Step {
+	var steps []Step
+	steps = append(steps, run.NewInitKube(cfg, kubeConfigTemplate, kubeConfigFile))
+	if cfg.UpdateDependencies {
+		steps = append(steps, run.NewDepUpdate(cfg))
 	}
+	steps = append(steps, run.NewUninstall(cfg))
+
+	return steps
+}
+
+var lint = func(cfg env.Config) []Step {
+	var steps []Step
+	for _, repo := range cfg.AddRepos {
+		steps = append(steps, run.NewAddRepo(cfg, repo))
+	}
+	if cfg.UpdateDependencies {
+		steps = append(steps, run.NewDepUpdate(cfg))
+	}
+	steps = append(steps, run.NewLint(cfg))
+	return steps
+}
+
+var help = func(cfg env.Config) []Step {
+	return []Step{run.NewHelp(cfg)}
 }

internal/helm/plan_test.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 	"testing"
 
+	"github.com/pelotech/drone-helm3/internal/env"
 	"github.com/pelotech/drone-helm3/internal/run"
 )
 
@@ -25,14 +26,14 @@ func (suite *PlanTestSuite) TestNewPlan() {
 	stepTwo := NewMockStep(ctrl)
 
 	origHelp := help
-	help = func(cfg Config) []Step {
+	help = func(cfg env.Config) []Step {
 		return []Step{stepOne, stepTwo}
 	}
 	defer func() { help = origHelp }()
 
 	stdout := strings.Builder{}
 	stderr := strings.Builder{}
-	cfg := Config{
+	cfg := env.Config{
 		Command:   "help",
 		Debug:     false,
 		Namespace: "outer",
@@ -40,22 +41,14 @@ func (suite *PlanTestSuite) TestNewPlan() {
 		Stderr:    &stderr,
 	}
 
-	runCfg := run.Config{
-		Debug:     false,
-		Namespace: "outer",
-		Stdout:    &stdout,
-		Stderr:    &stderr,
-	}
-
 	stepOne.EXPECT().
-		Prepare(runCfg)
+		Prepare()
 	stepTwo.EXPECT().
-		Prepare(runCfg)
+		Prepare()
 
 	plan, err := NewPlan(cfg)
 	suite.Require().Nil(err)
 	suite.Equal(cfg, plan.cfg)
-	suite.Equal(runCfg, plan.runCfg)
 }
 
 func (suite *PlanTestSuite) TestNewPlanAbortsOnError() {
@@ -65,17 +58,17 @@ func (suite *PlanTestSuite) TestNewPlanAbortsOnError() {
 	stepTwo := NewMockStep(ctrl)
 
 	origHelp := help
-	help = func(cfg Config) []Step {
+	help = func(cfg env.Config) []Step {
 		return []Step{stepOne, stepTwo}
 	}
 	defer func() { help = origHelp }()
 
-	cfg := Config{
+	cfg := env.Config{
 		Command: "help",
 	}
 
 	stepOne.EXPECT().
-		Prepare(gomock.Any()).
+		Prepare().
 		Return(fmt.Errorf("I'm starry Dave, aye, cat blew that"))
 
 	_, err := NewPlan(cfg)
@@ -89,18 +82,15 @@ func (suite *PlanTestSuite) TestExecute() {
 	stepOne := NewMockStep(ctrl)
 	stepTwo := NewMockStep(ctrl)
 
-	runCfg := run.Config{}
-
 	plan := Plan{
 		steps: []Step{stepOne, stepTwo},
-		runCfg: runCfg,
 	}
 
 	stepOne.EXPECT().
-		Execute(runCfg).
+		Execute().
 		Times(1)
 	stepTwo.EXPECT().
-		Execute(runCfg).
+		Execute().
 		Times(1)
 
 	suite.NoError(plan.Execute())
@@ -112,15 +102,12 @@ func (suite *PlanTestSuite) TestExecuteAbortsOnError() {
 	stepOne := NewMockStep(ctrl)
 	stepTwo := NewMockStep(ctrl)
 
-	runCfg := run.Config{}
-
 	plan := Plan{
 		steps: []Step{stepOne, stepTwo},
-		runCfg: runCfg,
 	}
 
 	stepOne.EXPECT().
-		Execute(runCfg).
+		Execute().
 		Times(1).
 		Return(fmt.Errorf("oh, he'll gnaw"))
 
@@ -129,50 +116,14 @@ func (suite *PlanTestSuite) TestExecuteAbortsOnError() {
 }
 
 func (suite *PlanTestSuite) TestUpgrade() {
-	cfg := Config{
-		ChartVersion:  "seventeen",
-		DryRun:        true,
-		Wait:          true,
-		Values:        "steadfastness,forthrightness",
-		StringValues:  "tensile_strength,flexibility",
-		ValuesFiles:   []string{"/root/price_inventory.yml"},
-		ReuseValues:   true,
-		Timeout:       "go sit in the corner",
-		Chart:         "billboard_top_100",
-		Release:       "post_malone_circles",
-		Force:         true,
-		AtomicUpgrade: true,
-		CleanupOnFail: true,
-	}
-
-	steps := upgrade(cfg)
+	steps := upgrade(env.Config{})
 	suite.Require().Equal(2, len(steps), "upgrade should return 2 steps")
-	suite.Require().IsType(&run.InitKube{}, steps[0])
-
-	suite.Require().IsType(&run.Upgrade{}, steps[1])
-	upgrade, _ := steps[1].(*run.Upgrade)
-
-	expected := &run.Upgrade{
-		Chart:         cfg.Chart,
-		Release:       cfg.Release,
-		ChartVersion:  cfg.ChartVersion,
-		DryRun:        true,
-		Wait:          cfg.Wait,
-		Values:        "steadfastness,forthrightness",
-		StringValues:  "tensile_strength,flexibility",
-		ValuesFiles:   []string{"/root/price_inventory.yml"},
-		ReuseValues:   cfg.ReuseValues,
-		Timeout:       cfg.Timeout,
-		Force:         cfg.Force,
-		Atomic:        true,
-		CleanupOnFail: true,
-	}
-
-	suite.Equal(expected, upgrade)
+	suite.IsType(&run.InitKube{}, steps[0])
+	suite.IsType(&run.Upgrade{}, steps[1])
 }
 
 func (suite *PlanTestSuite) TestUpgradeWithUpdateDependencies() {
-	cfg := Config{
+	cfg := env.Config{
 		UpdateDependencies: true,
 	}
 	steps := upgrade(cfg)
@@ -182,7 +133,7 @@ func (suite *PlanTestSuite) TestUpgradeWithUpdateDependencies() {
 }
 
 func (suite *PlanTestSuite) TestUpgradeWithAddRepos() {
-	cfg := Config{
+	cfg := env.Config{
 		AddRepos: []string{
 			"machine=https://github.com/harold_finch/themachine",
 		},
@@ -193,47 +144,15 @@ func (suite *PlanTestSuite) TestUpgradeWithAddRepos() {
 }
 
 func (suite *PlanTestSuite) TestUninstall() {
-	cfg := Config{
-		KubeToken:      "b2YgbXkgYWZmZWN0aW9u",
-		SkipTLSVerify:  true,
-		Certificate:    "cHJvY2xhaW1zIHdvbmRlcmZ1bCBmcmllbmRzaGlw",
-		APIServer:      "98.765.43.21",
-		ServiceAccount: "greathelm",
-		DryRun:         true,
-		Timeout:        "think about what you did",
-		Release:        "jetta_id_love_to_change_the_world",
-		KeepHistory:    true,
-	}
-
-	steps := uninstall(cfg)
+	steps := uninstall(env.Config{})
 	suite.Require().Equal(2, len(steps), "uninstall should return 2 steps")
 
-	suite.Require().IsType(&run.InitKube{}, steps[0])
-	init, _ := steps[0].(*run.InitKube)
-	var expected Step = &run.InitKube{
-		SkipTLSVerify:  true,
-		Certificate:    "cHJvY2xhaW1zIHdvbmRlcmZ1bCBmcmllbmRzaGlw",
-		APIServer:      "98.765.43.21",
-		ServiceAccount: "greathelm",
-		Token:          "b2YgbXkgYWZmZWN0aW9u",
-		TemplateFile:   kubeConfigTemplate,
-		ConfigFile:     kubeConfigFile,
-	}
-
-	suite.Equal(expected, init)
-
-	suite.Require().IsType(&run.Uninstall{}, steps[1])
-	actual, _ := steps[1].(*run.Uninstall)
-	expected = &run.Uninstall{
-		Release:     "jetta_id_love_to_change_the_world",
-		DryRun:      true,
-		KeepHistory: true,
-	}
-	suite.Equal(expected, actual)
+	suite.IsType(&run.InitKube{}, steps[0])
+	suite.IsType(&run.Uninstall{}, steps[1])
 }
 
 func (suite *PlanTestSuite) TestUninstallWithUpdateDependencies() {
-	cfg := Config{
+	cfg := env.Config{
 		UpdateDependencies: true,
 	}
 	steps := uninstall(cfg)
@@ -242,91 +161,14 @@ func (suite *PlanTestSuite) TestUninstallWithUpdateDependencies() {
 	suite.IsType(&run.DepUpdate{}, steps[1])
 }
 
-func (suite *PlanTestSuite) TestInitKube() {
-	cfg := Config{
-		KubeToken:      "cXVlZXIgY2hhcmFjdGVyCg==",
-		SkipTLSVerify:  true,
-		Certificate:    "b2Ygd29rZW5lc3MK",
-		APIServer:      "123.456.78.9",
-		ServiceAccount: "helmet",
-	}
-
-	steps := initKube(cfg)
-	suite.Require().Equal(1, len(steps), "initKube should return one step")
-	suite.Require().IsType(&run.InitKube{}, steps[0])
-	init, _ := steps[0].(*run.InitKube)
-
-	expected := &run.InitKube{
-		SkipTLSVerify:  true,
-		Certificate:    "b2Ygd29rZW5lc3MK",
-		APIServer:      "123.456.78.9",
-		ServiceAccount: "helmet",
-		Token:          "cXVlZXIgY2hhcmFjdGVyCg==",
-		TemplateFile:   kubeConfigTemplate,
-		ConfigFile:     kubeConfigFile,
-	}
-	suite.Equal(expected, init)
-}
-
-func (suite *PlanTestSuite) TestDepUpdate() {
-	cfg := Config{
-		UpdateDependencies: true,
-		Chart:              "scatterplot",
-	}
-
-	steps := depUpdate(cfg)
-	suite.Require().Equal(1, len(steps), "depUpdate should return one step")
-	suite.Require().IsType(&run.DepUpdate{}, steps[0])
-	update, _ := steps[0].(*run.DepUpdate)
-
-	expected := &run.DepUpdate{
-		Chart: "scatterplot",
-	}
-	suite.Equal(expected, update)
-}
-
-func (suite *PlanTestSuite) TestAddRepos() {
-	cfg := Config{
-		AddRepos: []string{
-			"first=https://add.repos/one",
-			"second=https://add.repos/two",
-		},
-	}
-	steps := addRepos(cfg)
-	suite.Require().Equal(2, len(steps), "addRepos should add one step per repo")
-	suite.Require().IsType(&run.AddRepo{}, steps[0])
-	suite.Require().IsType(&run.AddRepo{}, steps[1])
-	first := steps[0].(*run.AddRepo)
-	second := steps[1].(*run.AddRepo)
-
-	suite.Equal(first.Repo, "first=https://add.repos/one")
-	suite.Equal(second.Repo, "second=https://add.repos/two")
-}
-
 func (suite *PlanTestSuite) TestLint() {
-	cfg := Config{
-		Chart:        "./flow",
-		Values:       "steadfastness,forthrightness",
-		StringValues: "tensile_strength,flexibility",
-		ValuesFiles:  []string{"/root/price_inventory.yml"},
-		LintStrictly: true,
-	}
-
-	steps := lint(cfg)
-	suite.Equal(1, len(steps))
-
-	want := &run.Lint{
-		Chart:        "./flow",
-		Values:       "steadfastness,forthrightness",
-		StringValues: "tensile_strength,flexibility",
-		ValuesFiles:  []string{"/root/price_inventory.yml"},
-		Strict:       true,
-	}
-	suite.Equal(want, steps[0])
+	steps := lint(env.Config{})
+	suite.Require().Equal(1, len(steps))
+	suite.IsType(&run.Lint{}, steps[0])
 }
 
 func (suite *PlanTestSuite) TestLintWithUpdateDependencies() {
-	cfg := Config{
+	cfg := env.Config{
 		UpdateDependencies: true,
 	}
 	steps := lint(cfg)
@@ -335,7 +177,7 @@ func (suite *PlanTestSuite) TestLintWithUpdateDependencies() {
 }
 
 func (suite *PlanTestSuite) TestLintWithAddRepos() {
-	cfg := Config{
+	cfg := env.Config{
 		AddRepos: []string{"friendczar=https://github.com/logan_pierce/friendczar"},
 	}
 	steps := lint(cfg)
@@ -344,7 +186,7 @@ func (suite *PlanTestSuite) TestLintWithAddRepos() {
 }
 
 func (suite *PlanTestSuite) TestDeterminePlanUpgradeCommand() {
-	cfg := Config{
+	cfg := env.Config{
 		Command: "upgrade",
 	}
 	stepsMaker := determineSteps(cfg)
@@ -352,7 +194,7 @@ func (suite *PlanTestSuite) TestDeterminePlanUpgradeCommand() {
 }
 
 func (suite *PlanTestSuite) TestDeterminePlanUpgradeFromDroneEvent() {
-	cfg := Config{}
+	cfg := env.Config{}
 
 	upgradeEvents := []string{"push", "tag", "deployment", "pull_request", "promote", "rollback"}
 	for _, event := range upgradeEvents {
@@ -363,7 +205,7 @@ func (suite *PlanTestSuite) TestDeterminePlanUpgradeFromDroneEvent() {
 }
 
 func (suite *PlanTestSuite) TestDeterminePlanUninstallCommand() {
-	cfg := Config{
+	cfg := env.Config{
 		Command: "uninstall",
 	}
 	stepsMaker := determineSteps(cfg)
@@ -372,7 +214,7 @@ func (suite *PlanTestSuite) TestDeterminePlanUninstallCommand() {
 
 // helm_command = delete is provided as an alias for backward-compatibility with drone-helm
 func (suite *PlanTestSuite) TestDeterminePlanDeleteCommand() {
-	cfg := Config{
+	cfg := env.Config{
 		Command: "delete",
 	}
 	stepsMaker := determineSteps(cfg)
@@ -380,7 +222,7 @@ func (suite *PlanTestSuite) TestDeterminePlanDeleteCommand() {
 }
 
 func (suite *PlanTestSuite) TestDeterminePlanDeleteFromDroneEvent() {
-	cfg := Config{
+	cfg := env.Config{
 		DroneEvent: "delete",
 	}
 	stepsMaker := determineSteps(cfg)
@@ -388,7 +230,7 @@ func (suite *PlanTestSuite) TestDeterminePlanDeleteFromDroneEvent() {
 }
 
 func (suite *PlanTestSuite) TestDeterminePlanLintCommand() {
-	cfg := Config{
+	cfg := env.Config{
 		Command: "lint",
 	}
 
@@ -397,7 +239,7 @@ func (suite *PlanTestSuite) TestDeterminePlanLintCommand() {
 }
 
 func (suite *PlanTestSuite) TestDeterminePlanHelpCommand() {
-	cfg := Config{
+	cfg := env.Config{
 		Command: "help",
 	}
 

internal/run/addrepo.go

@@ -2,50 +2,58 @@ package run
 
 import (
 	"fmt"
+	"github.com/pelotech/drone-helm3/internal/env"
 	"strings"
 )
 
 // AddRepo is an execution step that calls `helm repo add` when executed.
 type AddRepo struct {
-	Repo string
+	*config
+	repo   string
+	caFile string
 	cmd    cmd
 }
 
+// NewAddRepo creates an AddRepo for the given repo-spec. No validation is performed at this time.
+func NewAddRepo(cfg env.Config, repo string) *AddRepo {
+	return &AddRepo{
+		config: newConfig(cfg),
+		repo:   repo,
+		caFile: cfg.RepoCAFile,
+	}
+}
+
 // Execute executes the `helm repo add` command.
-func (a *AddRepo) Execute(_ Config) error {
+func (a *AddRepo) Execute() error {
 	return a.cmd.Run()
 }
 
 // Prepare gets the AddRepo ready to execute.
-func (a *AddRepo) Prepare(cfg Config) error {
-	if a.Repo == "" {
+func (a *AddRepo) Prepare() error {
+	if a.repo == "" {
 		return fmt.Errorf("repo is required")
 	}
-	split := strings.SplitN(a.Repo, "=", 2)
+	split := strings.SplitN(a.repo, "=", 2)
 	if len(split) != 2 {
-		return fmt.Errorf("bad repo spec '%s'", a.Repo)
+		return fmt.Errorf("bad repo spec '%s'", a.repo)
 	}
 
 	name := split[0]
 	url := split[1]
 
-	args := make([]string, 0)
-
-	if cfg.Namespace != "" {
-		args = append(args, "--namespace", cfg.Namespace)
+	args := a.globalFlags()
+	args = append(args, "repo", "add")
+	if a.caFile != "" {
+		args = append(args, "--ca-file", a.caFile)
 	}
-	if cfg.Debug {
-		args = append(args, "--debug")
-	}
-
-	args = append(args, "repo", "add", name, url)
+	args = append(args, name, url)
 
 	a.cmd = command(helmBin, args...)
-	a.cmd.Stdout(cfg.Stdout)
-	a.cmd.Stderr(cfg.Stderr)
+	a.cmd.Stdout(a.stdout)
+	a.cmd.Stderr(a.stderr)
 
-	if cfg.Debug {
-		fmt.Fprintf(cfg.Stderr, "Generated command: '%s'\n", a.cmd.String())
+	if a.debug {
+		fmt.Fprintf(a.stderr, "Generated command: '%s'\n", a.cmd.String())
 	}
 
 	return nil

internal/run/addrepo_test.go

@@ -1,8 +1,8 @@
 package run
 
 import (
-	"fmt"
 	"github.com/golang/mock/gomock"
+	"github.com/pelotech/drone-helm3/internal/env"
 	"github.com/stretchr/testify/suite"
 	"strings"
 	"testing"
@@ -38,16 +38,21 @@ func TestAddRepoTestSuite(t *testing.T) {
 	suite.Run(t, new(AddRepoTestSuite))
 }
 
+func (suite *AddRepoTestSuite) TestNewAddRepo() {
+	repo := NewAddRepo(env.Config{}, "picompress=https://github.com/caleb_phipps/picompress")
+	suite.Require().NotNil(repo)
+	suite.Equal("picompress=https://github.com/caleb_phipps/picompress", repo.repo)
+	suite.NotNil(repo.config)
+}
+
 func (suite *AddRepoTestSuite) TestPrepareAndExecute() {
 	stdout := strings.Builder{}
 	stderr := strings.Builder{}
-	cfg := Config{
+	cfg := env.Config{
 		Stdout: &stdout,
 		Stderr: &stderr,
 	}
-	a := AddRepo{
-		Repo: "edeath=https://github.com/n_marks/e-death",
-	}
+	a := NewAddRepo(cfg, "edeath=https://github.com/n_marks/e-death")
 
 	suite.mockCmd.EXPECT().
 		Stdout(&stdout).
@@ -56,7 +61,7 @@ func (suite *AddRepoTestSuite) TestPrepareAndExecute() {
 		Stderr(&stderr).
 		Times(1)
 
-	suite.Require().NoError(a.Prepare(cfg))
+	suite.Require().NoError(a.Prepare())
 	suite.Equal(helmBin, suite.commandPath)
 	suite.Equal([]string{"repo", "add", "edeath", "https://github.com/n_marks/e-death"}, suite.commandArgs)
 
@@ -64,7 +69,7 @@ func (suite *AddRepoTestSuite) TestPrepareAndExecute() {
 		Run().
 		Times(1)
 
-	suite.Require().NoError(a.Execute(cfg))
+	suite.Require().NoError(a.Execute())
 
 }
 
@@ -72,70 +77,34 @@ func (suite *AddRepoTestSuite) TestPrepareRepoIsRequired() {
 	// These aren't really expected, but allowing them gives clearer test-failure messages
 	suite.mockCmd.EXPECT().Stdout(gomock.Any()).AnyTimes()
 	suite.mockCmd.EXPECT().Stderr(gomock.Any()).AnyTimes()
-	cfg := Config{}
-	a := AddRepo{}
+	a := NewAddRepo(env.Config{}, "")
 
-	err := a.Prepare(cfg)
+	err := a.Prepare()
 	suite.EqualError(err, "repo is required")
 }
 
 func (suite *AddRepoTestSuite) TestPrepareMalformedRepo() {
-	a := AddRepo{
-		Repo: "dwim",
-	}
-	err := a.Prepare(Config{})
+	a := NewAddRepo(env.Config{}, "dwim")
+	err := a.Prepare()
 	suite.EqualError(err, "bad repo spec 'dwim'")
 }
 
 func (suite *AddRepoTestSuite) TestPrepareWithEqualSignInURL() {
 	suite.mockCmd.EXPECT().Stdout(gomock.Any()).AnyTimes()
 	suite.mockCmd.EXPECT().Stderr(gomock.Any()).AnyTimes()
-	a := AddRepo{
-		Repo: "samaritan=https://github.com/arthur_claypool/samaritan?version=2.1",
-	}
-	suite.NoError(a.Prepare(Config{}))
+	a := NewAddRepo(env.Config{}, "samaritan=https://github.com/arthur_claypool/samaritan?version=2.1")
+	suite.NoError(a.Prepare())
 	suite.Contains(suite.commandArgs, "https://github.com/arthur_claypool/samaritan?version=2.1")
 }
 
-func (suite *AddRepoTestSuite) TestNamespaceFlag() {
+func (suite *AddRepoTestSuite) TestRepoAddFlags() {
 	suite.mockCmd.EXPECT().Stdout(gomock.Any()).AnyTimes()
 	suite.mockCmd.EXPECT().Stderr(gomock.Any()).AnyTimes()
-	cfg := Config{
-		Namespace: "alliteration",
+	cfg := env.Config{
+		RepoCAFile: "./helm/reporepo.cert",
 	}
-	a := AddRepo{
-		Repo: "edeath=https://github.com/theater_guy/e-death",
-	}
-
-	suite.NoError(a.Prepare(cfg))
-	suite.Equal(suite.commandPath, helmBin)
-	suite.Equal(suite.commandArgs, []string{"--namespace", "alliteration",
-		"repo", "add", "edeath", "https://github.com/theater_guy/e-death"})
-}
-
-func (suite *AddRepoTestSuite) TestDebugFlag() {
-	suite.mockCmd.EXPECT().Stdout(gomock.Any()).AnyTimes()
-	suite.mockCmd.EXPECT().Stderr(gomock.Any()).AnyTimes()
-
-	stderr := strings.Builder{}
-
-	command = func(path string, args ...string) cmd {
-		suite.mockCmd.EXPECT().
-			String().
-			Return(fmt.Sprintf("%s %s", path, strings.Join(args, " ")))
-
-		return suite.mockCmd
-	}
-
-	cfg := Config{
-		Debug:  true,
-		Stderr: &stderr,
-	}
-	a := AddRepo{
-		Repo: "edeath=https://github.com/the_bug/e-death",
-	}
-
-	suite.Require().NoError(a.Prepare(cfg))
-	suite.Equal(fmt.Sprintf("Generated command: '%s --debug "+
-		"repo add edeath https://github.com/the_bug/e-death'\n", helmBin), stderr.String())
+	a := NewAddRepo(cfg, "machine=https://github.com/harold_finch/themachine")
+	suite.NoError(a.Prepare())
+	suite.Equal([]string{"repo", "add", "--ca-file", "./helm/reporepo.cert",
+		"machine", "https://github.com/harold_finch/themachine"}, suite.commandArgs)
 }

internal/run/config.go

@@ -1,13 +1,33 @@
 package run
 
 import (
+	"github.com/pelotech/drone-helm3/internal/env"
 	"io"
 )
 
-// Config contains configuration applicable to all helm commands
-type Config struct {
-	Debug     bool
-	Namespace string
-	Stdout    io.Writer
-	Stderr    io.Writer
+type config struct {
+	debug     bool
+	namespace string
+	stdout    io.Writer
+	stderr    io.Writer
+}
+
+func newConfig(cfg env.Config) *config {
+	return &config{
+		debug:     cfg.Debug,
+		namespace: cfg.Namespace,
+		stdout:    cfg.Stdout,
+		stderr:    cfg.Stderr,
+	}
+}
+
+func (cfg *config) globalFlags() []string {
+	flags := []string{}
+	if cfg.debug {
+		flags = append(flags, "--debug")
+	}
+	if cfg.namespace != "" {
+		flags = append(flags, "--namespace", cfg.namespace)
+	}
+	return flags
 }

internal/run/config_test.go

@@ -0,0 +1,48 @@
+package run
+
+import (
+	"github.com/pelotech/drone-helm3/internal/env"
+	"github.com/stretchr/testify/suite"
+	"strings"
+	"testing"
+)
+
+type ConfigTestSuite struct {
+	suite.Suite
+}
+
+func TestConfigTestSuite(t *testing.T) {
+	suite.Run(t, new(ConfigTestSuite))
+}
+
+func (suite *ConfigTestSuite) TestNewConfig() {
+	stdout := &strings.Builder{}
+	stderr := &strings.Builder{}
+	envCfg := env.Config{
+		Namespace: "private",
+		Debug:     true,
+		Stdout:    stdout,
+		Stderr:    stderr,
+	}
+	cfg := newConfig(envCfg)
+	suite.Require().NotNil(cfg)
+	suite.Equal(&config{
+		namespace: "private",
+		debug:     true,
+		stdout:    stdout,
+		stderr:    stderr,
+	}, cfg)
+}
+
+func (suite *ConfigTestSuite) TestGlobalFlags() {
+	cfg := config{
+		debug:     true,
+		namespace: "public",
+	}
+	flags := cfg.globalFlags()
+	suite.Equal([]string{"--debug", "--namespace", "public"}, flags)
+
+	cfg = config{}
+	flags = cfg.globalFlags()
+	suite.Equal([]string{}, flags)
+}

internal/run/depupdate.go

@@ -2,42 +2,44 @@ package run
 
 import (
 	"fmt"
+	"github.com/pelotech/drone-helm3/internal/env"
 )
 
 // DepUpdate is an execution step that calls `helm dependency update` when executed.
 type DepUpdate struct {
-	Chart string
+	*config
+	chart string
 	cmd   cmd
 }
 
+// NewDepUpdate creates a DepUpdate using fields from the given Config. No validation is performed at this time.
+func NewDepUpdate(cfg env.Config) *DepUpdate {
+	return &DepUpdate{
+		config: newConfig(cfg),
+		chart:  cfg.Chart,
+	}
+}
+
 // Execute executes the `helm upgrade` command.
-func (d *DepUpdate) Execute(_ Config) error {
+func (d *DepUpdate) Execute() error {
 	return d.cmd.Run()
 }
 
 // Prepare gets the DepUpdate ready to execute.
-func (d *DepUpdate) Prepare(cfg Config) error {
-	if d.Chart == "" {
+func (d *DepUpdate) Prepare() error {
+	if d.chart == "" {
 		return fmt.Errorf("chart is required")
 	}
 
-	args := make([]string, 0)
-
-	if cfg.Namespace != "" {
-		args = append(args, "--namespace", cfg.Namespace)
-	}
-	if cfg.Debug {
-		args = append(args, "--debug")
-	}
-
-	args = append(args, "dependency", "update", d.Chart)
+	args := d.globalFlags()
+	args = append(args, "dependency", "update", d.chart)
 
 	d.cmd = command(helmBin, args...)
-	d.cmd.Stdout(cfg.Stdout)
-	d.cmd.Stderr(cfg.Stderr)
+	d.cmd.Stdout(d.stdout)
+	d.cmd.Stderr(d.stderr)
 
-	if cfg.Debug {
-		fmt.Fprintf(cfg.Stderr, "Generated command: '%s'\n", d.cmd.String())
+	if d.debug {
+		fmt.Fprintf(d.stderr, "Generated command: '%s'\n", d.cmd.String())
 	}
 
 	return nil

internal/run/depupdate_test.go

@@ -1,8 +1,8 @@
 package run
 
 import (
-	"fmt"
 	"github.com/golang/mock/gomock"
+	"github.com/pelotech/drone-helm3/internal/env"
 	"github.com/stretchr/testify/suite"
 	"strings"
 	"testing"
@@ -31,12 +31,21 @@ func TestDepUpdateTestSuite(t *testing.T) {
 	suite.Run(t, new(DepUpdateTestSuite))
 }
 
+func (suite *DepUpdateTestSuite) TestNewDepUpdate() {
+	cfg := env.Config{
+		Chart: "scatterplot",
+	}
+	d := NewDepUpdate(cfg)
+	suite.Equal("scatterplot", d.chart)
+}
+
 func (suite *DepUpdateTestSuite) TestPrepareAndExecute() {
 	defer suite.ctrl.Finish()
 
 	stdout := strings.Builder{}
 	stderr := strings.Builder{}
-	cfg := Config{
+	cfg := env.Config{
+		Chart:  "your_top_songs_2019",
 		Stdout: &stdout,
 		Stderr: &stderr,
 	}
@@ -55,74 +64,18 @@ func (suite *DepUpdateTestSuite) TestPrepareAndExecute() {
 		Run().
 		Times(1)
 
-	d := DepUpdate{
-		Chart: "your_top_songs_2019",
-	}
+	d := NewDepUpdate(cfg)
 
-	suite.Require().NoError(d.Prepare(cfg))
-	suite.NoError(d.Execute(cfg))
-}
-
-func (suite *DepUpdateTestSuite) TestPrepareNamespaceFlag() {
-	defer suite.ctrl.Finish()
-
-	cfg := Config{
-		Namespace: "spotify",
-	}
-
-	command = func(path string, args ...string) cmd {
-		suite.Equal([]string{"--namespace", "spotify", "dependency", "update", "your_top_songs_2019"}, args)
-
-		return suite.mockCmd
-	}
-	suite.mockCmd.EXPECT().Stdout(gomock.Any()).AnyTimes()
-	suite.mockCmd.EXPECT().Stderr(gomock.Any()).AnyTimes()
-
-	d := DepUpdate{
-		Chart: "your_top_songs_2019",
-	}
-
-	suite.Require().NoError(d.Prepare(cfg))
-}
-
-func (suite *DepUpdateTestSuite) TestPrepareDebugFlag() {
-	defer suite.ctrl.Finish()
-
-	stdout := strings.Builder{}
-	stderr := strings.Builder{}
-	cfg := Config{
-		Debug:  true,
-		Stdout: &stdout,
-		Stderr: &stderr,
-	}
-
-	command = func(path string, args ...string) cmd {
-		suite.mockCmd.EXPECT().
-			String().
-			Return(fmt.Sprintf("%s %s", path, strings.Join(args, " ")))
-
-		return suite.mockCmd
-	}
-	suite.mockCmd.EXPECT().Stdout(gomock.Any()).AnyTimes()
-	suite.mockCmd.EXPECT().Stderr(gomock.Any()).AnyTimes()
-
-	d := DepUpdate{
-		Chart: "your_top_songs_2019",
-	}
-
-	suite.Require().NoError(d.Prepare(cfg))
-
-	want := fmt.Sprintf("Generated command: '%s --debug dependency update your_top_songs_2019'\n", helmBin)
-	suite.Equal(want, stderr.String())
-	suite.Equal("", stdout.String())
+	suite.Require().NoError(d.Prepare())
+	suite.NoError(d.Execute())
 }
 
 func (suite *DepUpdateTestSuite) TestPrepareChartRequired() {
-	d := DepUpdate{}
+	d := NewDepUpdate(env.Config{})
 
 	suite.mockCmd.EXPECT().Stdout(gomock.Any()).AnyTimes()
 	suite.mockCmd.EXPECT().Stderr(gomock.Any()).AnyTimes()
 
-	err := d.Prepare(Config{})
+	err := d.Prepare()
 	suite.EqualError(err, "chart is required")
 }

internal/run/help.go

@@ -2,39 +2,47 @@ package run
 
 import (
 	"fmt"
+	"github.com/pelotech/drone-helm3/internal/env"
 )
 
 // Help is a step in a helm Plan that calls `helm help`.
 type Help struct {
-	HelmCommand string
+	*config
+	helmCommand string
 	cmd         cmd
 }
 
+// NewHelp creates a Help using fields from the given Config. No validation is performed at this time.
+func NewHelp(cfg env.Config) *Help {
+	return &Help{
+		config:      newConfig(cfg),
+		helmCommand: cfg.Command,
+	}
+}
+
 // Execute executes the `helm help` command.
-func (h *Help) Execute(cfg Config) error {
+func (h *Help) Execute() error {
 	if err := h.cmd.Run(); err != nil {
 		return fmt.Errorf("while running '%s': %w", h.cmd.String(), err)
 	}
 
-	if h.HelmCommand == "help" {
+	if h.helmCommand == "help" {
 		return nil
 	}
-	return fmt.Errorf("unknown command '%s'", h.HelmCommand)
+	return fmt.Errorf("unknown command '%s'", h.helmCommand)
 }
 
 // Prepare gets the Help ready to execute.
-func (h *Help) Prepare(cfg Config) error {
-	args := []string{"help"}
-	if cfg.Debug {
-		args = append([]string{"--debug"}, args...)
-	}
+func (h *Help) Prepare() error {
+	args := h.globalFlags()
+	args = append(args, "help")
 
 	h.cmd = command(helmBin, args...)
-	h.cmd.Stdout(cfg.Stdout)
-	h.cmd.Stderr(cfg.Stderr)
+	h.cmd.Stdout(h.stdout)
+	h.cmd.Stderr(h.stderr)
 
-	if cfg.Debug {
-		fmt.Fprintf(cfg.Stderr, "Generated command: '%s'\n", h.cmd.String())
+	if h.debug {
+		fmt.Fprintf(h.stderr, "Generated command: '%s'\n", h.cmd.String())
 	}
 
 	return nil

internal/run/help_test.go

@@ -1,8 +1,8 @@
 package run
 
 import (
-	"fmt"
 	"github.com/golang/mock/gomock"
+	"github.com/pelotech/drone-helm3/internal/env"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/suite"
 	"strings"
@@ -17,6 +17,15 @@ func TestHelpTestSuite(t *testing.T) {
 	suite.Run(t, new(HelpTestSuite))
 }
 
+func (suite *HelpTestSuite) TestNewHelp() {
+	cfg := env.Config{
+		Command: "everybody dance NOW!!",
+	}
+	help := NewHelp(cfg)
+	suite.Require().NotNil(help)
+	suite.Equal("everybody dance NOW!!", help.helmCommand)
+}
+
 func (suite *HelpTestSuite) TestPrepare() {
 	ctrl := gomock.NewController(suite.T())
 	defer ctrl.Finish()
@@ -39,13 +48,13 @@ func (suite *HelpTestSuite) TestPrepare() {
 	mCmd.EXPECT().
 		Stderr(&stderr)
 
-	cfg := Config{
+	cfg := env.Config{
 		Stdout: &stdout,
 		Stderr: &stderr,
 	}
 
-	h := Help{}
-	err := h.Prepare(cfg)
+	h := NewHelp(cfg)
+	err := h.Prepare()
 	suite.NoError(err)
 }
 
@@ -53,41 +62,15 @@ func (suite *HelpTestSuite) TestExecute() {
 	ctrl := gomock.NewController(suite.T())
 	defer ctrl.Finish()
 	mCmd := NewMockcmd(ctrl)
-	originalCommand := command
-	command = func(_ string, _ ...string) cmd {
-		return mCmd
-	}
-	defer func() { command = originalCommand }()
 
 	mCmd.EXPECT().
 		Run().
 		Times(2)
 
-	cfg := Config{}
-	help := Help{
-		HelmCommand: "help",
-		cmd:         mCmd,
-	}
-	suite.NoError(help.Execute(cfg))
-
-	help.HelmCommand = "get down on friday"
-	suite.EqualError(help.Execute(cfg), "unknown command 'get down on friday'")
-}
-
-func (suite *HelpTestSuite) TestPrepareDebugFlag() {
-	help := Help{}
-
-	stdout := strings.Builder{}
-	stderr := strings.Builder{}
-	cfg := Config{
-		Debug:  true,
-		Stdout: &stdout,
-		Stderr: &stderr,
-	}
-
-	help.Prepare(cfg)
-
-	want := fmt.Sprintf("Generated command: '%s --debug help'\n", helmBin)
-	suite.Equal(want, stderr.String())
-	suite.Equal("", stdout.String())
+	help := NewHelp(env.Config{Command: "help"})
+	help.cmd = mCmd
+	suite.NoError(help.Execute())
+
+	help.helmCommand = "get down on friday"
+	suite.EqualError(help.Execute(), "unknown command 'get down on friday'")
 }

internal/run/initkube.go

@@ -3,6 +3,7 @@ package run
 import (
 	"errors"
 	"fmt"
+	"github.com/pelotech/drone-helm3/internal/env"
 	"io"
 	"os"
 	"text/template"
@@ -10,14 +11,9 @@ import (
 
 // InitKube is a step in a helm Plan that initializes the kubernetes config file.
 type InitKube struct {
-	SkipTLSVerify  bool
-	Certificate    string
-	APIServer      string
-	ServiceAccount string
-	Token          string
-	TemplateFile   string
-	ConfigFile     string
-
+	*config
+	templateFilename string
+	configFilename   string
 	template         *template.Template
 	configFile       io.WriteCloser
 	values           kubeValues
@@ -32,58 +28,66 @@ type kubeValues struct {
 	Token          string
 }
 
+// NewInitKube creates a InitKube using the given Config and filepaths. No validation is performed at this time.
+func NewInitKube(cfg env.Config, templateFile, configFile string) *InitKube {
+	return &InitKube{
+		config: newConfig(cfg),
+		values: kubeValues{
+			SkipTLSVerify:  cfg.SkipTLSVerify,
+			Certificate:    cfg.Certificate,
+			APIServer:      cfg.APIServer,
+			Namespace:      cfg.Namespace,
+			ServiceAccount: cfg.ServiceAccount,
+			Token:          cfg.KubeToken,
+		},
+		templateFilename: templateFile,
+		configFilename:   configFile,
+	}
+}
+
 // Execute generates a kubernetes config file from drone-helm3's template.
-func (i *InitKube) Execute(cfg Config) error {
-	if cfg.Debug {
-		fmt.Fprintf(cfg.Stderr, "writing kubeconfig file to %s\n", i.ConfigFile)
+func (i *InitKube) Execute() error {
+	if i.debug {
+		fmt.Fprintf(i.stderr, "writing kubeconfig file to %s\n", i.configFilename)
 	}
 	defer i.configFile.Close()
 	return i.template.Execute(i.configFile, i.values)
 }
 
 // Prepare ensures all required configuration is present and that the config file is writable.
-func (i *InitKube) Prepare(cfg Config) error {
+func (i *InitKube) Prepare() error {
 	var err error
 
-	if i.APIServer == "" {
+	if i.values.APIServer == "" {
 		return errors.New("an API Server is needed to deploy")
 	}
-	if i.Token == "" {
+	if i.values.Token == "" {
 		return errors.New("token is needed to deploy")
 	}
 
-	if i.ServiceAccount == "" {
-		i.ServiceAccount = "helm"
+	if i.values.ServiceAccount == "" {
+		i.values.ServiceAccount = "helm"
 	}
 
-	if cfg.Debug {
-		fmt.Fprintf(cfg.Stderr, "loading kubeconfig template from %s\n", i.TemplateFile)
+	if i.debug {
+		fmt.Fprintf(i.stderr, "loading kubeconfig template from %s\n", i.templateFilename)
 	}
-	i.template, err = template.ParseFiles(i.TemplateFile)
+	i.template, err = template.ParseFiles(i.templateFilename)
 	if err != nil {
 		return fmt.Errorf("could not load kubeconfig template: %w", err)
 	}
 
-	i.values = kubeValues{
-		SkipTLSVerify:  i.SkipTLSVerify,
-		Certificate:    i.Certificate,
-		APIServer:      i.APIServer,
-		ServiceAccount: i.ServiceAccount,
-		Token:          i.Token,
-		Namespace:      cfg.Namespace,
-	}
-
-	if cfg.Debug {
-		if _, err := os.Stat(i.ConfigFile); err != nil {
+	if i.debug {
+		if _, err := os.Stat(i.configFilename); err != nil {
 			// non-nil err here isn't an actual error state; the kubeconfig just doesn't exist
-			fmt.Fprint(cfg.Stderr, "creating ")
+			fmt.Fprint(i.stderr, "creating ")
 		} else {
-			fmt.Fprint(cfg.Stderr, "truncating ")
+			fmt.Fprint(i.stderr, "truncating ")
 		}
-		fmt.Fprintf(cfg.Stderr, "kubeconfig file at %s\n", i.ConfigFile)
+		fmt.Fprintf(i.stderr, "kubeconfig file at %s\n", i.configFilename)
 	}
 
-	i.configFile, err = os.Create(i.ConfigFile)
+	i.configFile, err = os.Create(i.configFilename)
 	if err != nil {
 		return fmt.Errorf("could not open kubeconfig file for writing: %w", err)
 	}

internal/run/initkube_test.go

@@ -1,10 +1,13 @@
 package run
 
 import (
+	"fmt"
+	"github.com/pelotech/drone-helm3/internal/env"
 	"github.com/stretchr/testify/suite"
 	yaml "gopkg.in/yaml.v2"
 	"io/ioutil"
 	"os"
+	"strings"
 	"testing"
 	"text/template"
 )
@@ -17,6 +20,30 @@ func TestInitKubeTestSuite(t *testing.T) {
 	suite.Run(t, new(InitKubeTestSuite))
 }
 
+func (suite *InitKubeTestSuite) TestNewInitKube() {
+	cfg := env.Config{
+		SkipTLSVerify:  true,
+		Certificate:    "cHJvY2xhaW1zIHdvbmRlcmZ1bCBmcmllbmRzaGlw",
+		APIServer:      "98.765.43.21",
+		ServiceAccount: "greathelm",
+		KubeToken:      "b2YgbXkgYWZmZWN0aW9u",
+		Stderr:         &strings.Builder{},
+		Debug:          true,
+	}
+
+	init := NewInitKube(cfg, "conf.tpl", "conf.yml")
+	suite.Equal(kubeValues{
+		SkipTLSVerify:  true,
+		Certificate:    "cHJvY2xhaW1zIHdvbmRlcmZ1bCBmcmllbmRzaGlw",
+		APIServer:      "98.765.43.21",
+		ServiceAccount: "greathelm",
+		Token:          "b2YgbXkgYWZmZWN0aW9u",
+	}, init.values)
+	suite.Equal("conf.tpl", init.templateFilename)
+	suite.Equal("conf.yml", init.configFilename)
+	suite.NotNil(init.config)
+}
+
 func (suite *InitKubeTestSuite) TestPrepareExecute() {
 	templateFile, err := tempfile("kubeconfig********.yml.tpl", `
 certificate: {{ .Certificate }}
@@ -29,23 +56,20 @@ namespace: {{ .Namespace }}
 	defer os.Remove(configFile.Name())
 	suite.Require().Nil(err)
 
-	init := InitKube{
+	cfg := env.Config{
 		APIServer:   "Sysadmin",
 		Certificate: "CCNA",
-		Token:        "Aspire virtual currency",
-		TemplateFile: templateFile.Name(),
-		ConfigFile:   configFile.Name(),
-	}
-	cfg := Config{
+		KubeToken:   "Aspire virtual currency",
 		Namespace:   "Cisco",
 	}
-	err = init.Prepare(cfg)
+	init := NewInitKube(cfg, templateFile.Name(), configFile.Name())
+	err = init.Prepare()
 	suite.Require().Nil(err)
 
 	suite.IsType(&template.Template{}, init.template)
 	suite.NotNil(init.configFile)
 
-	err = init.Execute(cfg)
+	err = init.Execute()
 	suite.Require().Nil(err)
 
 	conf, err := ioutil.ReadFile(configFile.Name())
@@ -63,19 +87,16 @@ func (suite *InitKubeTestSuite) TestExecuteGeneratesConfig() {
 	defer os.Remove(configFile.Name())
 	suite.Require().NoError(err)
 
-	cfg := Config{
-		Namespace: "marshmallow",
-	}
-	init := InitKube{
-		ConfigFile:     configFile.Name(),
-		TemplateFile:   "../../assets/kubeconfig.tpl", // the actual kubeconfig template
+	cfg := env.Config{
 		APIServer:      "https://kube.cluster/peanut",
 		ServiceAccount: "chef",
-		Token:          "eWVhaCB3ZSB0b2tpbic=",
+		KubeToken:      "eWVhaCB3ZSB0b2tpbic=",
 		Certificate:    "d293LCB5b3UgYXJlIHNvIGNvb2wgZm9yIHNtb2tpbmcgd2VlZCDwn5mE",
+		Namespace:      "marshmallow",
 	}
-	suite.Require().NoError(init.Prepare(cfg))
-	suite.Require().NoError(init.Execute(cfg))
+	init := NewInitKube(cfg, "../../assets/kubeconfig.tpl", configFile.Name()) // the actual kubeconfig template
+	suite.Require().NoError(init.Prepare())
+	suite.Require().NoError(init.Execute())
 
 	contents, err := ioutil.ReadFile(configFile.Name())
 	suite.Require().NoError(err)
@@ -98,11 +119,11 @@ func (suite *InitKubeTestSuite) TestExecuteGeneratesConfig() {
 	suite.NoError(yaml.UnmarshalStrict(contents, &conf))
 
 	// test the other branch of the certificate/SkipTLSVerify conditional
-	init.SkipTLSVerify = true
-	init.Certificate = ""
+	init.values.SkipTLSVerify = true
+	init.values.Certificate = ""
 
-	suite.Require().NoError(init.Prepare(cfg))
-	suite.Require().NoError(init.Execute(cfg))
+	suite.Require().NoError(init.Prepare())
+	suite.Require().NoError(init.Execute())
 	contents, err = ioutil.ReadFile(configFile.Name())
 	suite.Require().NoError(err)
 	suite.Contains(string(contents), "insecure-skip-tls-verify: true")
@@ -116,25 +137,25 @@ func (suite *InitKubeTestSuite) TestPrepareParseError() {
 	defer os.Remove(templateFile.Name())
 	suite.Require().Nil(err)
 
-	init := InitKube{
+	cfg := env.Config{
 		APIServer:   "Sysadmin",
 		Certificate: "CCNA",
-		Token:        "Aspire virtual currency",
-		TemplateFile: templateFile.Name(),
+		KubeToken:   "Aspire virtual currency",
 	}
-	err = init.Prepare(Config{})
+	init := NewInitKube(cfg, templateFile.Name(), "")
+	err = init.Prepare()
 	suite.Error(err)
 	suite.Regexp("could not load kubeconfig .* function .* not defined", err)
 }
 
 func (suite *InitKubeTestSuite) TestPrepareNonexistentTemplateFile() {
-	init := InitKube{
+	cfg := env.Config{
 		APIServer:   "Sysadmin",
 		Certificate: "CCNA",
-		Token:        "Aspire virtual currency",
-		TemplateFile: "/usr/foreign/exclude/kubeprofig.tpl",
+		KubeToken:   "Aspire virtual currency",
 	}
-	err := init.Prepare(Config{})
+	init := NewInitKube(cfg, "/usr/foreign/exclude/kubeprofig.tpl", "")
+	err := init.Prepare()
 	suite.Error(err)
 	suite.Regexp("could not load kubeconfig .* no such file or directory", err)
 }
@@ -143,16 +164,14 @@ func (suite *InitKubeTestSuite) TestPrepareCannotOpenDestinationFile() {
 	templateFile, err := tempfile("kubeconfig********.yml.tpl", "hurgity burgity")
 	defer os.Remove(templateFile.Name())
 	suite.Require().Nil(err)
-	init := InitKube{
+	cfg := env.Config{
 		APIServer:   "Sysadmin",
 		Certificate: "CCNA",
-		Token:        "Aspire virtual currency",
-		TemplateFile: templateFile.Name(),
-		ConfigFile:   "/usr/foreign/exclude/kubeprofig",
+		KubeToken:   "Aspire virtual currency",
 	}
+	init := NewInitKube(cfg, templateFile.Name(), "/usr/foreign/exclude/kubeprofig")
 
-	cfg := Config{}
-	err = init.Prepare(cfg)
+	err = init.Prepare()
 	suite.Error(err)
 	suite.Regexp("could not open .* for writing: .* no such file or directory", err)
 }
@@ -167,24 +186,21 @@ func (suite *InitKubeTestSuite) TestPrepareRequiredConfig() {
 	suite.Require().Nil(err)
 
 	// initial config with all required fields present
-	init := InitKube{
+	cfg := env.Config{
 		APIServer:   "Sysadmin",
 		Certificate: "CCNA",
-		Token:        "Aspire virtual currency",
-		TemplateFile: templateFile.Name(),
-		ConfigFile:   configFile.Name(),
+		KubeToken:   "Aspire virtual currency",
 	}
 
-	cfg := Config{}
+	init := NewInitKube(cfg, templateFile.Name(), configFile.Name())
+	suite.NoError(init.Prepare()) // consistency check; we should be starting in a happy state
 
-	suite.NoError(init.Prepare(cfg)) // consistency check; we should be starting in a happy state
+	init.values.APIServer = ""
+	suite.Error(init.Prepare(), "APIServer should be required.")
 
-	init.APIServer = ""
-	suite.Error(init.Prepare(cfg), "APIServer should be required.")
-
-	init.APIServer = "Sysadmin"
-	init.Token = ""
-	suite.Error(init.Prepare(cfg), "Token should be required.")
+	init.values.APIServer = "Sysadmin"
+	init.values.Token = ""
+	suite.Error(init.Prepare(), "Token should be required.")
 }
 
 func (suite *InitKubeTestSuite) TestPrepareDefaultsServiceAccount() {
@@ -196,18 +212,43 @@ func (suite *InitKubeTestSuite) TestPrepareDefaultsServiceAccount() {
 	defer os.Remove(configFile.Name())
 	suite.Require().Nil(err)
 
-	init := InitKube{
+	cfg := env.Config{
 		APIServer:   "Sysadmin",
 		Certificate: "CCNA",
-		Token:        "Aspire virtual currency",
-		TemplateFile: templateFile.Name(),
-		ConfigFile:   configFile.Name(),
+		KubeToken:   "Aspire virtual currency",
+	}
+	init := NewInitKube(cfg, templateFile.Name(), configFile.Name())
+
+	init.Prepare()
+	suite.Equal("helm", init.values.ServiceAccount)
 }
 
-	cfg := Config{}
+func (suite *InitKubeTestSuite) TestDebugOutput() {
+	templateFile, err := tempfile("kubeconfig********.yml.tpl", "hurgity burgity")
+	defer os.Remove(templateFile.Name())
+	suite.Require().Nil(err)
 
-	init.Prepare(cfg)
-	suite.Equal("helm", init.ServiceAccount)
+	configFile, err := tempfile("kubeconfig********.yml", "")
+	defer os.Remove(configFile.Name())
+	suite.Require().Nil(err)
+
+	stdout := &strings.Builder{}
+	stderr := &strings.Builder{}
+	cfg := env.Config{
+		APIServer: "http://my.kube.server/",
+		KubeToken: "QSBzaW5nbGUgcm9zZQ==",
+		Debug:     true,
+		Stdout:    stdout,
+		Stderr:    stderr,
+	}
+	init := NewInitKube(cfg, templateFile.Name(), configFile.Name())
+	suite.NoError(init.Prepare())
+
+	suite.Contains(stderr.String(), fmt.Sprintf("loading kubeconfig template from %s\n", templateFile.Name()))
+	suite.Contains(stderr.String(), fmt.Sprintf("truncating kubeconfig file at %s\n", configFile.Name()))
+
+	suite.NoError(init.Execute())
+	suite.Contains(stderr.String(), fmt.Sprintf("writing kubeconfig file to %s\n", configFile.Name()))
 }
 
 func tempfile(name, contents string) (*os.File, error) {

internal/run/lint.go

@@ -2,61 +2,67 @@ package run
 
 import (
 	"fmt"
+	"github.com/pelotech/drone-helm3/internal/env"
 )
 
 // Lint is an execution step that calls `helm lint` when executed.
 type Lint struct {
-	Chart        string
-	Values       string
-	StringValues string
-	ValuesFiles  []string
-	Strict       bool
+	*config
+	chart        string
+	values       string
+	stringValues string
+	valuesFiles  []string
+	strict       bool
 	cmd          cmd
 }
 
+// NewLint creates a Lint using fields from the given Config. No validation is performed at this time.
+func NewLint(cfg env.Config) *Lint {
+	return &Lint{
+		config:       newConfig(cfg),
+		chart:        cfg.Chart,
+		values:       cfg.Values,
+		stringValues: cfg.StringValues,
+		valuesFiles:  cfg.ValuesFiles,
+		strict:       cfg.LintStrictly,
+	}
+}
+
 // Execute executes the `helm lint` command.
-func (l *Lint) Execute(_ Config) error {
+func (l *Lint) Execute() error {
 	return l.cmd.Run()
 }
 
 // Prepare gets the Lint ready to execute.
-func (l *Lint) Prepare(cfg Config) error {
-	if l.Chart == "" {
+func (l *Lint) Prepare() error {
+	if l.chart == "" {
 		return fmt.Errorf("chart is required")
 	}
 
-	args := make([]string, 0)
-
-	if cfg.Namespace != "" {
-		args = append(args, "--namespace", cfg.Namespace)
-	}
-	if cfg.Debug {
-		args = append(args, "--debug")
-	}
-
+	args := l.globalFlags()
 	args = append(args, "lint")
 
-	if l.Values != "" {
-		args = append(args, "--set", l.Values)
+	if l.values != "" {
+		args = append(args, "--set", l.values)
 	}
-	if l.StringValues != "" {
-		args = append(args, "--set-string", l.StringValues)
+	if l.stringValues != "" {
+		args = append(args, "--set-string", l.stringValues)
 	}
-	for _, vFile := range l.ValuesFiles {
+	for _, vFile := range l.valuesFiles {
 		args = append(args, "--values", vFile)
 	}
-	if l.Strict {
+	if l.strict {
 		args = append(args, "--strict")
 	}
 
-	args = append(args, l.Chart)
+	args = append(args, l.chart)
 
 	l.cmd = command(helmBin, args...)
-	l.cmd.Stdout(cfg.Stdout)
-	l.cmd.Stderr(cfg.Stderr)
+	l.cmd.Stdout(l.stdout)
+	l.cmd.Stderr(l.stderr)
 
-	if cfg.Debug {
-		fmt.Fprintf(cfg.Stderr, "Generated command: '%s'\n", l.cmd.String())
+	if l.debug {
+		fmt.Fprintf(l.stderr, "Generated command: '%s'\n", l.cmd.String())
 	}
 
 	return nil

internal/run/lint_test.go

@@ -1,8 +1,8 @@
 package run
 
 import (
-	"fmt"
 	"github.com/golang/mock/gomock"
+	"github.com/pelotech/drone-helm3/internal/env"
 	"github.com/stretchr/testify/suite"
 	"strings"
 	"testing"
@@ -31,19 +31,36 @@ func TestLintTestSuite(t *testing.T) {
 	suite.Run(t, new(LintTestSuite))
 }
 
+func (suite *LintTestSuite) TestNewLint() {
+	cfg := env.Config{
+		Chart:        "./flow",
+		Values:       "steadfastness,forthrightness",
+		StringValues: "tensile_strength,flexibility",
+		ValuesFiles:  []string{"/root/price_inventory.yml"},
+		LintStrictly: true,
+	}
+	lint := NewLint(cfg)
+	suite.Require().NotNil(lint)
+	suite.Equal("./flow", lint.chart)
+	suite.Equal("steadfastness,forthrightness", lint.values)
+	suite.Equal("tensile_strength,flexibility", lint.stringValues)
+	suite.Equal([]string{"/root/price_inventory.yml"}, lint.valuesFiles)
+	suite.Equal(true, lint.strict)
+	suite.NotNil(lint.config)
+}
+
 func (suite *LintTestSuite) TestPrepareAndExecute() {
 	defer suite.ctrl.Finish()
 
 	stdout := strings.Builder{}
 	stderr := strings.Builder{}
 
-	l := Lint{
+	cfg := env.Config{
 		Chart:  "./epic/mychart",
-	}
-	cfg := Config{
 		Stdout: &stdout,
 		Stderr: &stderr,
 	}
+	l := NewLint(cfg)
 
 	command = func(path string, args ...string) cmd {
 		suite.Equal(helmBin, path)
@@ -52,6 +69,7 @@ func (suite *LintTestSuite) TestPrepareAndExecute() {
 		return suite.mockCmd
 	}
 
+	suite.mockCmd.EXPECT().String().AnyTimes()
 	suite.mockCmd.EXPECT().
 		Stdout(&stdout)
 	suite.mockCmd.EXPECT().
@@ -60,9 +78,9 @@ func (suite *LintTestSuite) TestPrepareAndExecute() {
 		Run().
 		Times(1)
 
-	err := l.Prepare(cfg)
+	err := l.Prepare()
 	suite.Require().Nil(err)
-	l.Execute(cfg)
+	l.Execute()
 }
 
 func (suite *LintTestSuite) TestPrepareRequiresChart() {
@@ -70,25 +88,22 @@ func (suite *LintTestSuite) TestPrepareRequiresChart() {
 	suite.mockCmd.EXPECT().Stdout(gomock.Any()).AnyTimes()
 	suite.mockCmd.EXPECT().Stderr(gomock.Any()).AnyTimes()
 
-	cfg := Config{}
-	l := Lint{}
-
-	err := l.Prepare(cfg)
+	l := NewLint(env.Config{})
+	err := l.Prepare()
 	suite.EqualError(err, "chart is required", "Chart should be mandatory")
 }
 
 func (suite *LintTestSuite) TestPrepareWithLintFlags() {
 	defer suite.ctrl.Finish()
 
-	cfg := Config{}
-
-	l := Lint{
+	cfg := env.Config{
 		Chart:        "./uk/top_40",
 		Values:       "width=5",
 		StringValues: "version=2.0",
 		ValuesFiles:  []string{"/usr/local/underrides", "/usr/local/overrides"},
-		Strict:       true,
+		LintStrictly: true,
 	}
+	l := NewLint(cfg)
 
 	command = func(path string, args ...string) cmd {
 		suite.Equal(helmBin, path)
@@ -105,66 +120,8 @@ func (suite *LintTestSuite) TestPrepareWithLintFlags() {
 
 	suite.mockCmd.EXPECT().Stdout(gomock.Any()).AnyTimes()
 	suite.mockCmd.EXPECT().Stderr(gomock.Any()).AnyTimes()
+	suite.mockCmd.EXPECT().String().AnyTimes()
 
-	err := l.Prepare(cfg)
+	err := l.Prepare()
 	suite.Require().Nil(err)
 }
-
-func (suite *LintTestSuite) TestPrepareWithDebugFlag() {
-	defer suite.ctrl.Finish()
-
-	stderr := strings.Builder{}
-
-	cfg := Config{
-		Debug:  true,
-		Stderr: &stderr,
-	}
-
-	l := Lint{
-		Chart: "./scotland/top_40",
-	}
-
-	command = func(path string, args ...string) cmd {
-		suite.mockCmd.EXPECT().
-			String().
-			Return(fmt.Sprintf("%s %s", path, strings.Join(args, " ")))
-
-		return suite.mockCmd
-	}
-
-	suite.mockCmd.EXPECT().Stdout(gomock.Any())
-	suite.mockCmd.EXPECT().Stderr(&stderr)
-
-	err := l.Prepare(cfg)
-	suite.Require().Nil(err)
-
-	want := fmt.Sprintf("Generated command: '%s --debug lint ./scotland/top_40'\n", helmBin)
-	suite.Equal(want, stderr.String())
-}
-
-func (suite *LintTestSuite) TestPrepareWithNamespaceFlag() {
-	defer suite.ctrl.Finish()
-
-	cfg := Config{
-		Namespace: "table-service",
-	}
-
-	l := Lint{
-		Chart: "./wales/top_40",
-	}
-
-	actual := []string{}
-	command = func(path string, args ...string) cmd {
-		actual = args
-		return suite.mockCmd
-	}
-
-	suite.mockCmd.EXPECT().Stdout(gomock.Any()).AnyTimes()
-	suite.mockCmd.EXPECT().Stderr(gomock.Any()).AnyTimes()
-
-	err := l.Prepare(cfg)
-	suite.Require().Nil(err)
-
-	expected := []string{"--namespace", "table-service", "lint", "./wales/top_40"}
-	suite.Equal(expected, actual)
-}

internal/run/uninstall.go

@@ -2,53 +2,57 @@ package run
 
 import (
 	"fmt"
+	"github.com/pelotech/drone-helm3/internal/env"
 )
 
 // Uninstall is an execution step that calls `helm uninstall` when executed.
 type Uninstall struct {
-	Release     string
-	DryRun      bool
-	KeepHistory bool
+	*config
+	release     string
+	dryRun      bool
+	keepHistory bool
 	cmd         cmd
 }
 
+// NewUninstall creates an Uninstall using fields from the given Config. No validation is performed at this time.
+func NewUninstall(cfg env.Config) *Uninstall {
+	return &Uninstall{
+		config:      newConfig(cfg),
+		release:     cfg.Release,
+		dryRun:      cfg.DryRun,
+		keepHistory: cfg.KeepHistory,
+	}
+}
+
 // Execute executes the `helm uninstall` command.
-func (u *Uninstall) Execute(_ Config) error {
+func (u *Uninstall) Execute() error {
 	return u.cmd.Run()
 }
 
 // Prepare gets the Uninstall ready to execute.
-func (u *Uninstall) Prepare(cfg Config) error {
-	if u.Release == "" {
+func (u *Uninstall) Prepare() error {
+	if u.release == "" {
 		return fmt.Errorf("release is required")
 	}
 
-	args := make([]string, 0)
-
-	if cfg.Namespace != "" {
-		args = append(args, "--namespace", cfg.Namespace)
-	}
-	if cfg.Debug {
-		args = append(args, "--debug")
-	}
-
+	args := u.globalFlags()
 	args = append(args, "uninstall")
 
-	if u.DryRun {
+	if u.dryRun {
 		args = append(args, "--dry-run")
 	}
-	if u.KeepHistory {
+	if u.keepHistory {
 		args = append(args, "--keep-history")
 	}
 
-	args = append(args, u.Release)
+	args = append(args, u.release)
 
 	u.cmd = command(helmBin, args...)
-	u.cmd.Stdout(cfg.Stdout)
-	u.cmd.Stderr(cfg.Stderr)
+	u.cmd.Stdout(u.stdout)
+	u.cmd.Stderr(u.stderr)
 
-	if cfg.Debug {
-		fmt.Fprintf(cfg.Stderr, "Generated command: '%s'\n", u.cmd.String())
+	if u.debug {
+		fmt.Fprintf(u.stderr, "Generated command: '%s'\n", u.cmd.String())
 	}
 
 	return nil

internal/run/uninstall_test.go

@@ -1,10 +1,9 @@
 package run
 
 import (
-	"fmt"
 	"github.com/golang/mock/gomock"
+	"github.com/pelotech/drone-helm3/internal/env"
 	"github.com/stretchr/testify/suite"
-	"strings"
 	"testing"
 )
 
@@ -35,12 +34,26 @@ func TestUninstallTestSuite(t *testing.T) {
 	suite.Run(t, new(UninstallTestSuite))
 }
 
+func (suite *UninstallTestSuite) TestNewUninstall() {
+	cfg := env.Config{
+		DryRun:      true,
+		Release:     "jetta_id_love_to_change_the_world",
+		KeepHistory: true,
+	}
+	u := NewUninstall(cfg)
+	suite.Equal("jetta_id_love_to_change_the_world", u.release)
+	suite.Equal(true, u.dryRun)
+	suite.Equal(true, u.keepHistory)
+	suite.NotNil(u.config)
+}
+
 func (suite *UninstallTestSuite) TestPrepareAndExecute() {
 	defer suite.ctrl.Finish()
 
-	u := Uninstall{
+	cfg := env.Config{
 		Release: "zayde_wølf_king",
 	}
+	u := NewUninstall(cfg)
 
 	actual := []string{}
 	command = func(path string, args ...string) cmd {
@@ -58,92 +71,49 @@ func (suite *UninstallTestSuite) TestPrepareAndExecute() {
 		Run().
 		Times(1)
 
-	cfg := Config{}
-	suite.NoError(u.Prepare(cfg))
+	suite.NoError(u.Prepare())
 	expected := []string{"uninstall", "zayde_wølf_king"}
 	suite.Equal(expected, actual)
 
-	u.Execute(cfg)
+	u.Execute()
 }
 
 func (suite *UninstallTestSuite) TestPrepareDryRunFlag() {
-	u := Uninstall{
+	cfg := env.Config{
 		Release: "firefox_ak_wildfire",
 		DryRun:  true,
 	}
-	cfg := Config{}
+	u := NewUninstall(cfg)
 
 	suite.mockCmd.EXPECT().Stdout(gomock.Any()).AnyTimes()
 	suite.mockCmd.EXPECT().Stderr(gomock.Any()).AnyTimes()
 
-	suite.NoError(u.Prepare(cfg))
+	suite.NoError(u.Prepare())
 	expected := []string{"uninstall", "--dry-run", "firefox_ak_wildfire"}
 	suite.Equal(expected, suite.actualArgs)
 }
 
 func (suite *UninstallTestSuite) TestPrepareKeepHistoryFlag() {
-	u := Uninstall{
+	cfg := env.Config{
 		Release:     "perturbator_sentient",
 		KeepHistory: true,
 	}
-	cfg := Config{}
+	u := NewUninstall(cfg)
 
 	suite.mockCmd.EXPECT().Stdout(gomock.Any()).AnyTimes()
 	suite.mockCmd.EXPECT().Stderr(gomock.Any()).AnyTimes()
 
-	suite.NoError(u.Prepare(cfg))
+	suite.NoError(u.Prepare())
 	expected := []string{"uninstall", "--keep-history", "perturbator_sentient"}
 	suite.Equal(expected, suite.actualArgs)
 }
 
-func (suite *UninstallTestSuite) TestPrepareNamespaceFlag() {
-	u := Uninstall{
-		Release: "carly_simon_run_away_with_me",
-	}
-	cfg := Config{
-		Namespace: "emotion",
-	}
-
-	suite.mockCmd.EXPECT().Stdout(gomock.Any()).AnyTimes()
-	suite.mockCmd.EXPECT().Stderr(gomock.Any()).AnyTimes()
-
-	suite.NoError(u.Prepare(cfg))
-	expected := []string{"--namespace", "emotion", "uninstall", "carly_simon_run_away_with_me"}
-	suite.Equal(expected, suite.actualArgs)
-}
-
-func (suite *UninstallTestSuite) TestPrepareDebugFlag() {
-	u := Uninstall{
-		Release: "just_a_band_huff_and_puff",
-	}
-	stderr := strings.Builder{}
-	cfg := Config{
-		Debug:  true,
-		Stderr: &stderr,
-	}
-
-	command = func(path string, args ...string) cmd {
-		suite.mockCmd.EXPECT().
-			String().
-			Return(fmt.Sprintf("%s %s", path, strings.Join(args, " ")))
-
-		return suite.mockCmd
-	}
-
-	suite.mockCmd.EXPECT().Stdout(gomock.Any()).AnyTimes()
-	suite.mockCmd.EXPECT().Stderr(&stderr).AnyTimes()
-
-	suite.NoError(u.Prepare(cfg))
-	suite.Equal(fmt.Sprintf("Generated command: '%s --debug "+
-		"uninstall just_a_band_huff_and_puff'\n", helmBin), stderr.String())
-}
-
 func (suite *UninstallTestSuite) TestPrepareRequiresRelease() {
 	// These aren't really expected, but allowing them gives clearer test-failure messages
 	suite.mockCmd.EXPECT().Stdout(gomock.Any()).AnyTimes()
 	suite.mockCmd.EXPECT().Stderr(gomock.Any()).AnyTimes()
 
-	u := Uninstall{}
-	err := u.Prepare(Config{})
+	u := NewUninstall(env.Config{})
+	err := u.Prepare()
 	suite.EqualError(err, "release is required", "Uninstall.Release should be mandatory")
 }

internal/run/upgrade.go

@@ -2,94 +2,113 @@ package run
 
 import (
 	"fmt"
+	"github.com/pelotech/drone-helm3/internal/env"
 )
 
 // Upgrade is an execution step that calls `helm upgrade` when executed.
 type Upgrade struct {
-	Chart   string
-	Release string
+	*config
+	chart   string
+	release string
 
-	ChartVersion  string
-	DryRun        bool
-	Wait          bool
-	Values        string
-	StringValues  string
-	ValuesFiles   []string
-	ReuseValues   bool
-	Timeout       string
-	Force         bool
-	Atomic        bool
-	CleanupOnFail bool
+	chartVersion  string
+	dryRun        bool
+	wait          bool
+	values        string
+	stringValues  string
+	valuesFiles   []string
+	reuseValues   bool
+	timeout       string
+	force         bool
+	atomic        bool
+	cleanupOnFail bool
+	caFile        string
 
 	cmd cmd
 }
 
+// NewUpgrade creates an Upgrade using fields from the given Config. No validation is performed at this time.
+func NewUpgrade(cfg env.Config) *Upgrade {
+	return &Upgrade{
+		config:        newConfig(cfg),
+		chart:         cfg.Chart,
+		release:       cfg.Release,
+		chartVersion:  cfg.ChartVersion,
+		dryRun:        cfg.DryRun,
+		wait:          cfg.Wait,
+		values:        cfg.Values,
+		stringValues:  cfg.StringValues,
+		valuesFiles:   cfg.ValuesFiles,
+		reuseValues:   cfg.ReuseValues,
+		timeout:       cfg.Timeout,
+		force:         cfg.Force,
+		atomic:        cfg.AtomicUpgrade,
+		cleanupOnFail: cfg.CleanupOnFail,
+		caFile:        cfg.RepoCAFile,
+	}
+}
+
 // Execute executes the `helm upgrade` command.
-func (u *Upgrade) Execute(_ Config) error {
+func (u *Upgrade) Execute() error {
 	return u.cmd.Run()
 }
 
 // Prepare gets the Upgrade ready to execute.
-func (u *Upgrade) Prepare(cfg Config) error {
-	if u.Chart == "" {
+func (u *Upgrade) Prepare() error {
+	if u.chart == "" {
 		return fmt.Errorf("chart is required")
 	}
-	if u.Release == "" {
+	if u.release == "" {
 		return fmt.Errorf("release is required")
 	}
 
-	args := make([]string, 0)
-
-	if cfg.Namespace != "" {
-		args = append(args, "--namespace", cfg.Namespace)
-	}
-	if cfg.Debug {
-		args = append(args, "--debug")
-	}
-
+	args := u.globalFlags()
 	args = append(args, "upgrade", "--install")
 
-	if u.ChartVersion != "" {
-		args = append(args, "--version", u.ChartVersion)
+	if u.chartVersion != "" {
+		args = append(args, "--version", u.chartVersion)
 	}
-	if u.DryRun {
+	if u.dryRun {
 		args = append(args, "--dry-run")
 	}
-	if u.Wait {
+	if u.wait {
 		args = append(args, "--wait")
 	}
-	if u.ReuseValues {
+	if u.reuseValues {
 		args = append(args, "--reuse-values")
 	}
-	if u.Timeout != "" {
-		args = append(args, "--timeout", u.Timeout)
+	if u.timeout != "" {
+		args = append(args, "--timeout", u.timeout)
 	}
-	if u.Force {
+	if u.force {
 		args = append(args, "--force")
 	}
-	if u.Atomic {
+	if u.atomic {
 		args = append(args, "--atomic")
 	}
-	if u.CleanupOnFail {
+	if u.cleanupOnFail {
 		args = append(args, "--cleanup-on-fail")
 	}
-	if u.Values != "" {
-		args = append(args, "--set", u.Values)
+	if u.values != "" {
+		args = append(args, "--set", u.values)
 	}
-	if u.StringValues != "" {
-		args = append(args, "--set-string", u.StringValues)
+	if u.stringValues != "" {
+		args = append(args, "--set-string", u.stringValues)
 	}
-	for _, vFile := range u.ValuesFiles {
+	for _, vFile := range u.valuesFiles {
 		args = append(args, "--values", vFile)
 	}
+	if u.caFile != "" {
+		args = append(args, "--ca-file", u.caFile)
+	}
 
-	args = append(args, u.Release, u.Chart)
+	args = append(args, u.release, u.chart)
 	u.cmd = command(helmBin, args...)
-	u.cmd.Stdout(cfg.Stdout)
-	u.cmd.Stderr(cfg.Stderr)
+	u.cmd.Stdout(u.stdout)
+	u.cmd.Stderr(u.stderr)
 
-	if cfg.Debug {
-		fmt.Fprintf(cfg.Stderr, "Generated command: '%s'\n", u.cmd.String())
+	if u.debug {
+		fmt.Fprintf(u.stderr, "Generated command: '%s'\n", u.cmd.String())
 	}
 
 	return nil

internal/run/upgrade_test.go

@@ -3,6 +3,7 @@ package run
 import (
 	"fmt"
 	"github.com/golang/mock/gomock"
+	"github.com/pelotech/drone-helm3/internal/env"
 	"github.com/stretchr/testify/suite"
 	"strings"
 	"testing"
@@ -31,13 +32,48 @@ func TestUpgradeTestSuite(t *testing.T) {
 	suite.Run(t, new(UpgradeTestSuite))
 }
 
+func (suite *UpgradeTestSuite) TestNewUpgrade() {
+	cfg := env.Config{
+		ChartVersion:  "seventeen",
+		DryRun:        true,
+		Wait:          true,
+		Values:        "steadfastness,forthrightness",
+		StringValues:  "tensile_strength,flexibility",
+		ValuesFiles:   []string{"/root/price_inventory.yml"},
+		ReuseValues:   true,
+		Timeout:       "go sit in the corner",
+		Chart:         "billboard_top_100",
+		Release:       "post_malone_circles",
+		Force:         true,
+		AtomicUpgrade: true,
+		CleanupOnFail: true,
+	}
+
+	up := NewUpgrade(cfg)
+	suite.Equal(cfg.Chart, up.chart)
+	suite.Equal(cfg.Release, up.release)
+	suite.Equal(cfg.ChartVersion, up.chartVersion)
+	suite.Equal(true, up.dryRun)
+	suite.Equal(cfg.Wait, up.wait)
+	suite.Equal("steadfastness,forthrightness", up.values)
+	suite.Equal("tensile_strength,flexibility", up.stringValues)
+	suite.Equal([]string{"/root/price_inventory.yml"}, up.valuesFiles)
+	suite.Equal(cfg.ReuseValues, up.reuseValues)
+	suite.Equal(cfg.Timeout, up.timeout)
+	suite.Equal(cfg.Force, up.force)
+	suite.Equal(true, up.atomic)
+	suite.Equal(true, up.cleanupOnFail)
+	suite.NotNil(up.config)
+}
+
 func (suite *UpgradeTestSuite) TestPrepareAndExecute() {
 	defer suite.ctrl.Finish()
 
-	u := Upgrade{
+	cfg := env.Config{
 		Chart:   "at40",
 		Release: "jonas_brothers_only_human",
 	}
+	u := NewUpgrade(cfg)
 
 	command = func(path string, args ...string) cmd {
 		suite.Equal(helmBin, path)
@@ -54,19 +90,20 @@ func (suite *UpgradeTestSuite) TestPrepareAndExecute() {
 		Run().
 		Times(1)
 
-	cfg := Config{}
-	err := u.Prepare(cfg)
+	err := u.Prepare()
 	suite.Require().Nil(err)
-	u.Execute(cfg)
+	u.Execute()
 }
 
 func (suite *UpgradeTestSuite) TestPrepareNamespaceFlag() {
 	defer suite.ctrl.Finish()
 
-	u := Upgrade{
+	cfg := env.Config{
+		Namespace: "melt",
 		Chart:     "at40",
 		Release:   "shaed_trampoline",
 	}
+	u := NewUpgrade(cfg)
 
 	command = func(path string, args ...string) cmd {
 		suite.Equal(helmBin, path)
@@ -78,17 +115,14 @@ func (suite *UpgradeTestSuite) TestPrepareNamespaceFlag() {
 	suite.mockCmd.EXPECT().Stdout(gomock.Any())
 	suite.mockCmd.EXPECT().Stderr(gomock.Any())
 
-	cfg := Config{
-		Namespace: "melt",
-	}
-	err := u.Prepare(cfg)
+	err := u.Prepare()
 	suite.Require().Nil(err)
 }
 
 func (suite *UpgradeTestSuite) TestPrepareWithUpgradeFlags() {
 	defer suite.ctrl.Finish()
 
-	u := Upgrade{
+	cfg := env.Config{
 		Chart:         "hot_ac",
 		Release:       "maroon_5_memories",
 		ChartVersion:  "radio_edit",
@@ -100,11 +134,11 @@ func (suite *UpgradeTestSuite) TestPrepareWithUpgradeFlags() {
 		ReuseValues:   true,
 		Timeout:       "sit_in_the_corner",
 		Force:         true,
-		Atomic:        true,
+		AtomicUpgrade: true,
 		CleanupOnFail: true,
+		RepoCAFile:    "local_ca.cert",
 	}
-
-	cfg := Config{}
+	u := NewUpgrade(cfg)
 
 	command = func(path string, args ...string) cmd {
 		suite.Equal(helmBin, path)
@@ -121,6 +155,7 @@ func (suite *UpgradeTestSuite) TestPrepareWithUpgradeFlags() {
 			"--set-string", "height=5ft10in",
 			"--values", "/usr/local/stats",
 			"--values", "/usr/local/grades",
+			"--ca-file", "local_ca.cert",
 			"maroon_5_memories", "hot_ac"}, args)
 
 		return suite.mockCmd
@@ -129,7 +164,7 @@ func (suite *UpgradeTestSuite) TestPrepareWithUpgradeFlags() {
 	suite.mockCmd.EXPECT().Stdout(gomock.Any())
 	suite.mockCmd.EXPECT().Stderr(gomock.Any())
 
-	err := u.Prepare(cfg)
+	err := u.Prepare()
 	suite.Require().Nil(err)
 }
 
@@ -138,34 +173,30 @@ func (suite *UpgradeTestSuite) TestRequiresChartAndRelease() {
 	suite.mockCmd.EXPECT().Stdout(gomock.Any()).AnyTimes()
 	suite.mockCmd.EXPECT().Stderr(gomock.Any()).AnyTimes()
 
-	u := Upgrade{
-		Release: "seth_everman_unskippable_cutscene",
-	}
+	u := NewUpgrade(env.Config{})
+	u.release = "seth_everman_unskippable_cutscene"
 
-	err := u.Prepare(Config{})
+	err := u.Prepare()
 	suite.EqualError(err, "chart is required", "Chart should be mandatory")
 
-	u = Upgrade{
-		Chart: "billboard_top_zero",
-	}
+	u.release = ""
+	u.chart = "billboard_top_zero"
 
-	err = u.Prepare(Config{})
+	err = u.Prepare()
 	suite.EqualError(err, "release is required", "Release should be mandatory")
 }
 
 func (suite *UpgradeTestSuite) TestPrepareDebugFlag() {
-	u := Upgrade{
-		Chart:   "at40",
-		Release: "lewis_capaldi_someone_you_loved",
-	}
-
 	stdout := strings.Builder{}
 	stderr := strings.Builder{}
-	cfg := Config{
+	cfg := env.Config{
+		Chart:   "at40",
+		Release: "lewis_capaldi_someone_you_loved",
 		Debug:   true,
 		Stdout:  &stdout,
 		Stderr:  &stderr,
 	}
+	u := NewUpgrade(cfg)
 
 	command = func(path string, args ...string) cmd {
 		suite.mockCmd.EXPECT().
@@ -180,7 +211,7 @@ func (suite *UpgradeTestSuite) TestPrepareDebugFlag() {
 	suite.mockCmd.EXPECT().
 		Stderr(&stderr)
 
-	u.Prepare(cfg)
+	u.Prepare()
 
 	want := fmt.Sprintf("Generated command: '%s --debug upgrade "+
 		"--install lewis_capaldi_someone_you_loved at40'\n", helmBin)