refactor(terraform): remove unused options (aquasecurity#6446)

pkg/iac/scanners/terraform/executor/executor.go

@@ -14,52 +14,31 @@ import (
 	"github.com/aquasecurity/trivy/pkg/iac/rego"
 	"github.com/aquasecurity/trivy/pkg/iac/rules"
 	"github.com/aquasecurity/trivy/pkg/iac/scan"
-	"github.com/aquasecurity/trivy/pkg/iac/severity"
-	"github.com/aquasecurity/trivy/pkg/iac/state"
 	"github.com/aquasecurity/trivy/pkg/iac/terraform"
 	"github.com/aquasecurity/trivy/pkg/iac/types"
 )
 
 // Executor scans HCL blocks by running all registered rules against them
 type Executor struct {
-	enableIgnores     bool
-	excludedRuleIDs   []string
-	includedRuleIDs   []string
-	ignoreCheckErrors bool
-	workspaceName     string
-	useSingleThread   bool
-	debug             debug.Logger
-	resultsFilters    []func(scan.Results) scan.Results
-	severityOverrides map[string]string
-	regoScanner       *rego.Scanner
-	regoOnly          bool
-	stateFuncs        []func(*state.State)
-	frameworks        []framework.Framework
+	workspaceName  string
+	debug          debug.Logger
+	resultsFilters []func(scan.Results) scan.Results
+	regoScanner    *rego.Scanner
+	regoOnly       bool
+	frameworks     []framework.Framework
 }
 
 // New creates a new Executor
 func New(options ...Option) *Executor {
 	s := &Executor{
-		ignoreCheckErrors: true,
-		enableIgnores:     true,
-		regoOnly:          false,
+		regoOnly: false,
 	}
 	for _, option := range options {
 		option(s)
 	}
 	return s
 }
 
-// Find element in list
-func checkInList(id string, list []string) bool {
-	for _, codeIgnored := range list {
-		if codeIgnored == id {
-			return true
-		}
-	}
-	return false
-}
-
 func (e *Executor) Execute(modules terraform.Modules) (scan.Results, error) {
 
 	e.debug.Log("Adapting modules...")
@@ -70,90 +49,46 @@ func (e *Executor) Execute(modules terraform.Modules) (scan.Results, error) {
 	if threads > 1 {
 		threads--
 	}
-	if e.useSingleThread {
-		threads = 1
-	}
-	e.debug.Log("Using max routines of %d", threads)
 
-	e.debug.Log("Applying state modifier functions...")
-	for _, f := range e.stateFuncs {
-		f(infra)
-	}
+	e.debug.Log("Using max routines of %d", threads)
 
 	registeredRules := rules.GetRegistered(e.frameworks...)
 	e.debug.Log("Initialized %d rule(s).", len(registeredRules))
 
-	pool := NewPool(threads, registeredRules, modules, infra, e.ignoreCheckErrors, e.regoScanner, e.regoOnly)
+	pool := NewPool(threads, registeredRules, modules, infra, e.regoScanner, e.regoOnly)
 	e.debug.Log("Created pool with %d worker(s) to apply rules.", threads)
+
 	results, err := pool.Run()
 	if err != nil {
 		return nil, err
 	}
-	e.debug.Log("Finished applying rules.")
 
-	if e.enableIgnores {
-		e.debug.Log("Applying ignores...")
-		var ignores ignore.Rules
-		for _, module := range modules {
-			ignores = append(ignores, module.Ignores()...)
-		}
+	e.debug.Log("Finished applying rules.")
 
-		ignorers := map[string]ignore.Ignorer{
-			"ws":     workspaceIgnorer(e.workspaceName),
-			"ignore": attributeIgnorer(modules),
-		}
+	e.debug.Log("Applying ignores...")
+	var ignores ignore.Rules
+	for _, module := range modules {
+		ignores = append(ignores, module.Ignores()...)
+	}
 
-		results.Ignore(ignores, ignorers)
+	ignorers := map[string]ignore.Ignorer{
+		"ws":     workspaceIgnorer(e.workspaceName),
+		"ignore": attributeIgnorer(modules),
+	}
 
-		for _, ignored := range results.GetIgnored() {
-			e.debug.Log("Ignored '%s' at '%s'.", ignored.Rule().LongID(), ignored.Range())
-		}
+	results.Ignore(ignores, ignorers)
 
-	} else {
-		e.debug.Log("Ignores are disabled.")
+	for _, ignored := range results.GetIgnored() {
+		e.debug.Log("Ignored '%s' at '%s'.", ignored.Rule().LongID(), ignored.Range())
 	}
 
-	results = e.updateSeverity(results)
 	results = e.filterResults(results)
 
 	e.sortResults(results)
 	return results, nil
 }
 
-func (e *Executor) updateSeverity(results []scan.Result) scan.Results {
-	if len(e.severityOverrides) == 0 {
-		return results
-	}
-
-	var overriddenResults scan.Results
-	for _, res := range results {
-		for code, sev := range e.severityOverrides {
-			if res.Rule().LongID() != code {
-				continue
-			}
-
-			overrides := scan.Results([]scan.Result{res})
-			override := res.Rule()
-			override.Severity = severity.Severity(sev)
-			overrides.SetRule(override)
-			res = overrides[0]
-		}
-		overriddenResults = append(overriddenResults, res)
-	}
-
-	return overriddenResults
-}
-
 func (e *Executor) filterResults(results scan.Results) scan.Results {
-	includedOnly := len(e.includedRuleIDs) > 0
-	for i, result := range results {
-		id := result.Rule().LongID()
-		if (includedOnly && !checkInList(id, e.includedRuleIDs)) || checkInList(id, e.excludedRuleIDs) {
-			e.debug.Log("Excluding '%s' at '%s'.", result.Rule().LongID(), result.Range())
-			results[i].OverrideStatus(scan.StatusIgnored)
-		}
-	}
-
 	if len(e.resultsFilters) > 0 && len(results) > 0 {
 		before := len(results.GetIgnored())
 		e.debug.Log("Applying %d results filters to %d results...", len(results), before)

pkg/iac/scanners/terraform/executor/executor_test.go

@@ -78,8 +78,7 @@ resource "problem" "this" {
 
 	modules, _, err := p.EvaluateAll(context.TODO())
 	require.NoError(t, err)
-
-	_, err = New(OptionStopOnErrors(false)).Execute(modules)
+	_, err = New().Execute(modules)
 	assert.Error(t, err)
 }
 
@@ -127,6 +126,6 @@ resource "problem" "this" {
 	modules, _, err := p.EvaluateAll(context.TODO())
 	require.NoError(t, err)
 
-	_, err = New(OptionStopOnErrors(false)).Execute(modules)
+	_, err = New().Execute(modules)
 	assert.Error(t, err)
 }

pkg/iac/scanners/terraform/executor/option.go

@@ -7,7 +7,6 @@ import (
 	"github.com/aquasecurity/trivy/pkg/iac/framework"
 	"github.com/aquasecurity/trivy/pkg/iac/rego"
 	"github.com/aquasecurity/trivy/pkg/iac/scan"
-	"github.com/aquasecurity/trivy/pkg/iac/state"
 )
 
 type Option func(s *Executor)
@@ -24,66 +23,24 @@ func OptionWithResultsFilter(f func(scan.Results) scan.Results) Option {
 	}
 }
 
-func OptionWithSeverityOverrides(overrides map[string]string) Option {
-	return func(s *Executor) {
-		s.severityOverrides = overrides
-	}
-}
-
 func OptionWithDebugWriter(w io.Writer) Option {
 	return func(s *Executor) {
 		s.debug = debug.New(w, "terraform", "executor")
 	}
 }
 
-func OptionNoIgnores() Option {
-	return func(s *Executor) {
-		s.enableIgnores = false
-	}
-}
-
-func OptionExcludeRules(ruleIDs []string) Option {
-	return func(s *Executor) {
-		s.excludedRuleIDs = ruleIDs
-	}
-}
-
-func OptionIncludeRules(ruleIDs []string) Option {
-	return func(s *Executor) {
-		s.includedRuleIDs = ruleIDs
-	}
-}
-
-func OptionStopOnErrors(stop bool) Option {
-	return func(s *Executor) {
-		s.ignoreCheckErrors = !stop
-	}
-}
-
 func OptionWithWorkspaceName(workspaceName string) Option {
 	return func(s *Executor) {
 		s.workspaceName = workspaceName
 	}
 }
 
-func OptionWithSingleThread(single bool) Option {
-	return func(s *Executor) {
-		s.useSingleThread = single
-	}
-}
-
 func OptionWithRegoScanner(s *rego.Scanner) Option {
 	return func(e *Executor) {
 		e.regoScanner = s
 	}
 }
 
-func OptionWithStateFunc(f ...func(*state.State)) Option {
-	return func(e *Executor) {
-		e.stateFuncs = f
-	}
-}
-
 func OptionWithRegoOnly(regoOnly bool) Option {
 	return func(e *Executor) {
 		e.regoOnly = regoOnly

pkg/iac/scanners/terraform/executor/pool.go

@@ -17,24 +17,22 @@ import (
 )
 
 type Pool struct {
-	size         int
-	modules      terraform.Modules
-	state        *state.State
-	rules        []types.RegisteredRule
-	ignoreErrors bool
-	rs           *rego.Scanner
-	regoOnly     bool
+	size     int
+	modules  terraform.Modules
+	state    *state.State
+	rules    []types.RegisteredRule
+	rs       *rego.Scanner
+	regoOnly bool
 }
 
-func NewPool(size int, rules []types.RegisteredRule, modules terraform.Modules, st *state.State, ignoreErrors bool, regoScanner *rego.Scanner, regoOnly bool) *Pool {
+func NewPool(size int, rules []types.RegisteredRule, modules terraform.Modules, st *state.State, regoScanner *rego.Scanner, regoOnly bool) *Pool {
 	return &Pool{
-		size:         size,
-		rules:        rules,
-		state:        st,
-		modules:      modules,
-		ignoreErrors: ignoreErrors,
-		rs:           regoScanner,
-		regoOnly:     regoOnly,
+		size:     size,
+		rules:    rules,
+		state:    st,
+		modules:  modules,
+		rs:       regoScanner,
+		regoOnly: regoOnly,
 	}
 }
 
@@ -69,17 +67,15 @@ func (p *Pool) Run() (scan.Results, error) {
 				for _, module := range p.modules {
 					mod := *module
 					outgoing <- &hclModuleRuleJob{
-						module:       &mod,
-						rule:         r,
-						ignoreErrors: p.ignoreErrors,
+						module: &mod,
+						rule:   r,
 					}
 				}
 			} else {
 				// run defsec rule
 				outgoing <- &infraRuleJob{
-					state:        p.state,
-					rule:         r,
-					ignoreErrors: p.ignoreErrors,
+					state: p.state,
+					rule:  r,
 				}
 			}
 		}
@@ -105,14 +101,11 @@ type Job interface {
 type infraRuleJob struct {
 	state *state.State
 	rule  types.RegisteredRule
-
-	ignoreErrors bool
 }
 
 type hclModuleRuleJob struct {
-	module       *terraform.Module
-	rule         types.RegisteredRule
-	ignoreErrors bool
+	module *terraform.Module
+	rule   types.RegisteredRule
 }
 
 type regoJob struct {
@@ -122,24 +115,21 @@ type regoJob struct {
 }
 
 func (h *infraRuleJob) Run() (_ scan.Results, err error) {
-	if h.ignoreErrors {
-		defer func() {
-			if panicErr := recover(); panicErr != nil {
-				err = fmt.Errorf("%s\n%s", panicErr, string(runtimeDebug.Stack()))
-			}
-		}()
-	}
+	defer func() {
+		if panicErr := recover(); panicErr != nil {
+			err = fmt.Errorf("%s\n%s", panicErr, string(runtimeDebug.Stack()))
+		}
+	}()
+
 	return h.rule.Evaluate(h.state), err
 }
 
 func (h *hclModuleRuleJob) Run() (results scan.Results, err error) {
-	if h.ignoreErrors {
-		defer func() {
-			if panicErr := recover(); panicErr != nil {
-				err = fmt.Errorf("%s\n%s", panicErr, string(runtimeDebug.Stack()))
-			}
-		}()
-	}
+	defer func() {
+		if panicErr := recover(); panicErr != nil {
+			err = fmt.Errorf("%s\n%s", panicErr, string(runtimeDebug.Stack()))
+		}
+	}()
 	customCheck := h.rule.GetRule().CustomChecks.Terraform
 	for _, block := range h.module.GetBlocks() {
 		if !isCustomCheckRequiredForBlock(customCheck, block) {