feat(misconf): add --file-patterns for terraform misconfiguration

	- docs: make usage --file-patterns clear as it still includes default
files
	- test: add case for dockerfile as name 'Containerfile'
	- test: add case for terraform .tf.json

docs/docs/references/cli/client.md

@@ -47,7 +47,7 @@ Vulnerability Flags
 Misconfiguration Flags
       --config-data strings         specify paths from which data for the Rego policies will be recursively loaded
       --config-policy strings       specify paths to the Rego policy files directory, applying config files
-      --file-patterns strings       specify config file patterns, available with '--security-checks config'
+      --file-patterns strings       specify additional config file mathcing in regex format, available with '--security-checks config'
       --include-non-failures        include successes and exceptions, available with '--security-checks config'
       --policy-namespaces strings   Rego namespaces
       --trace                       enable more verbose trace output for custom queries

docs/docs/references/cli/config.md

@@ -2,6 +2,7 @@
 
 ``` bash
 Scan config files for misconfigurations
+Support: Dockerfile/Containerfile, Yaml, JSON, Helm, Terraform, CloudFormation
 
 Usage:
   trivy config [flags] DIR
@@ -32,7 +33,7 @@ Cache Flags
 Misconfiguration Flags
       --config-data strings         specify paths from which data for the Rego policies will be recursively loaded
       --config-policy strings       specify paths to the Rego policy files directory, applying config files
-      --file-patterns strings       specify config file patterns, available with '--security-checks config'
+      --file-patterns strings       specify additional config file mathcing in regex format, available with '--security-checks config'
       --include-non-failures        include successes and exceptions, available with '--security-checks config'
       --policy-namespaces strings   Rego namespaces
       --trace                       enable more verbose trace output for custom queries

docs/docs/references/cli/fs.md

@@ -55,7 +55,7 @@ Vulnerability Flags
 Misconfiguration Flags
       --config-data strings         specify paths from which data for the Rego policies will be recursively loaded
       --config-policy strings       specify paths to the Rego policy files directory, applying config files
-      --file-patterns strings       specify config file patterns, available with '--security-checks config'
+      --file-patterns strings       specify additional config file mathcing in regex format, available with '--security-checks config'
       --include-non-failures        include successes and exceptions, available with '--security-checks config'
       --policy-namespaces strings   Rego namespaces
       --trace                       enable more verbose trace output for custom queries
@@ -82,4 +82,4 @@ Global Flags:
   -q, --quiet                     suppress progress bar and log output
       --timeout duration          timeout (default 5m0s)
   -v, --version                   show version
-```
+```

docs/docs/references/cli/image.md

@@ -73,7 +73,7 @@ Vulnerability Flags
 Misconfiguration Flags
       --config-data strings         specify paths from which data for the Rego policies will be recursively loaded
       --config-policy strings       specify paths to the Rego policy files directory, applying config files
-      --file-patterns strings       specify config file patterns, available with '--security-checks config'
+      --file-patterns strings       specify additional config file mathcing in regex format, available with '--security-checks config'
       --include-non-failures        include successes and exceptions, available with '--security-checks config'
       --policy-namespaces strings   Rego namespaces
       --trace                       enable more verbose trace output for custom queries

docs/docs/references/cli/repo.md

@@ -52,7 +52,7 @@ Vulnerability Flags
 Misconfiguration Flags
       --config-data strings         specify paths from which data for the Rego policies will be recursively loaded
       --config-policy strings       specify paths to the Rego policy files directory, applying config files
-      --file-patterns strings       specify config file patterns, available with '--security-checks config'
+      --file-patterns strings       specify additional config file mathcing in regex format, available with '--security-checks config'
       --include-non-failures        include successes and exceptions, available with '--security-checks config'
       --policy-namespaces strings   Rego namespaces
       --trace                       enable more verbose trace output for custom queries
@@ -84,4 +84,4 @@ Global Flags:
   -q, --quiet                     suppress progress bar and log output
       --timeout duration          timeout (default 5m0s)
   -v, --version                   show version
-```
+```

docs/docs/references/cli/rootfs.md

@@ -55,7 +55,7 @@ Vulnerability Flags
 Misconfiguration Flags
       --config-data strings         specify paths from which data for the Rego policies will be recursively loaded
       --config-policy strings       specify paths to the Rego policy files directory, applying config files
-      --file-patterns strings       specify config file patterns, available with '--security-checks config'
+      --file-patterns strings       specify additional config file mathcing in regex format, available with '--security-checks config'
       --include-non-failures        include successes and exceptions, available with '--security-checks config'
       --policy-namespaces strings   Rego namespaces
       --trace                       enable more verbose trace output for custom queries
@@ -76,4 +76,4 @@ Global Flags:
   -q, --quiet                     suppress progress bar and log output
       --timeout duration          timeout (default 5m0s)
   -v, --version                   show version
-```
+```

pkg/commands/app.go

@@ -542,6 +542,7 @@ func NewConfigCommand(globalFlags *flag.GlobalFlagGroup) *cobra.Command {
 		Use:     "config [flags] DIR",
 		Aliases: []string{"conf"},
 		Short:   "Scan config files for misconfigurations",
+		Long:    "Support: Dockerfile/Containerfile, Yaml, JSON, Helm, Terraform, CloudFormation",
 		PreRunE: func(cmd *cobra.Command, args []string) error {
 			if err := configFlags.Bind(cmd); err != nil {
 				return xerrors.Errorf("flag bind error: %w", err)

pkg/fanal/analyzer/config/config.go

@@ -37,7 +37,7 @@ func (o *ScannerOption) Sort() {
 }
 
 func RegisterConfigAnalyzers(filePatterns []string) error {
-	var dockerRegexp, jsonRegexp, yamlRegexp, helmRegexp *regexp.Regexp
+	var dockerRegexp, jsonRegexp, yamlRegexp, helmRegexp, terraformRegexp *regexp.Regexp
 	for _, p := range filePatterns {
 		// e.g. "dockerfile:my_dockerfile_*"
 		s := strings.SplitN(p, separator, 2)
@@ -59,13 +59,15 @@ func RegisterConfigAnalyzers(filePatterns []string) error {
 			yamlRegexp = r
 		case types.Helm:
 			helmRegexp = r
+		case types.Terraform:
+			terraformRegexp = r
 		default:
 			return xerrors.Errorf("unknown file type: %s, pattern: %s", fileType, pattern)
 		}
 	}
 
 	analyzer.RegisterAnalyzer(dockerfile.NewConfigAnalyzer(dockerRegexp))
-	analyzer.RegisterAnalyzer(terraform.NewConfigAnalyzer())
+	analyzer.RegisterAnalyzer(terraform.NewConfigAnalyzer(terraformRegexp))
 	analyzer.RegisterAnalyzer(json.NewConfigAnalyzer(jsonRegexp))
 	analyzer.RegisterAnalyzer(yaml.NewConfigAnalyzer(yamlRegexp))
 	analyzer.RegisterAnalyzer(helm.NewConfigAnalyzer(helmRegexp))

pkg/fanal/analyzer/config/dockerfile/docker_test.go

@@ -118,6 +118,11 @@ func Test_dockerConfigAnalyzer_Required(t *testing.T) {
 			filePath: "docker/Dockerfile",
 			want:     true,
 		},
+		{
+			name:     "Containerfile in dir",
+			filePath: "Containerfile",
+			want:     true,
+		},
 		{
 			name:     "Dockerfile as prefix",
 			filePath: "Dockerfilebuild",

pkg/fanal/analyzer/config/helm/helm.go

@@ -79,7 +79,7 @@ func (a ConfigAnalyzer) Required(filePath string, info os.FileInfo) bool {
 	}
 
 	name := filepath.Base(filePath)
-	for _, acceptable := range []string{"Chart.yaml", ".helmignore"} {
+	for _, acceptable := range []string{".helmignore"} {
 		if strings.EqualFold(name, acceptable) {
 			return true
 		}

pkg/fanal/analyzer/config/terraform/terraform.go

@@ -5,6 +5,7 @@ import (
 	"io"
 	"os"
 	"path/filepath"
+	"regexp"
 
 	"golang.org/x/exp/slices"
 	"golang.org/x/xerrors"
@@ -18,10 +19,13 @@ const version = 1
 var requiredExts = []string{".tf", ".tf.json"}
 
 type ConfigAnalyzer struct {
+	filePattern *regexp.Regexp
 }
 
-func NewConfigAnalyzer() ConfigAnalyzer {
-	return ConfigAnalyzer{}
+func NewConfigAnalyzer(filePattern *regexp.Regexp) ConfigAnalyzer {
+	return ConfigAnalyzer{
+		filePattern: filePattern,
+	}
 }
 
 // Analyze returns a name of Terraform file

pkg/fanal/analyzer/config/terraform/terraform_test.go

@@ -13,14 +13,14 @@ import (
 	"github.com/aquasecurity/trivy/pkg/fanal/types"
 )
 
-func TestConfigAnalyzer_Analyze(t *testing.T) {
+func Test_TerraformConfigAnalyzer_Analyze(t *testing.T) {
 	tests := []struct {
 		name  string
 		input analyzer.AnalysisInput
 		want  *analyzer.AnalysisResult
 	}{
 		{
-			name: "happy path",
+			name: "happy path1",
 			input: analyzer.AnalysisInput{
 				Dir:      "path/to/",
 				FilePath: "main.tf",
@@ -38,10 +38,29 @@ func TestConfigAnalyzer_Analyze(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "happy path2",
+			input: analyzer.AnalysisInput{
+				Dir:      "path/to/",
+				FilePath: "main.tf.json",
+				Content:  bytes.NewReader(nil),
+			},
+			want: &analyzer.AnalysisResult{
+				Files: map[types.HandlerType][]types.File{
+					types.MisconfPostHandler: {
+						{
+							Type:    types.Terraform,
+							Path:    "main.tf.json",
+							Content: []byte{},
+						},
+					},
+				},
+			},
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			a := terraform.ConfigAnalyzer{}
+			a := terraform.NewConfigAnalyzer(tt.filePattern)
 			ctx := context.Background()
 			got, err := a.Analyze(ctx, tt.input)
 
@@ -51,17 +70,23 @@ func TestConfigAnalyzer_Analyze(t *testing.T) {
 	}
 }
 
-func TestConfigAnalyzer_Required(t *testing.T) {
+func Test_TerraformConfigAnalyzer_Required(t *testing.T) {
 	tests := []struct {
-		name     string
-		filePath string
-		want     bool
+		name        string
+		filePattern *regexp.Regexp
+		filePath    string
+		want        bool
 	}{
 		{
-			name:     "happy path",
+			name:     "happy path1",
 			filePath: "/path/to/main.tf",
 			want:     true,
 		},
+		{
+			name:     "happy path2",
+			filePath: "/path/to/main.tf.json",
+			want:     true,
+		},
 		{
 			name:     "hcl",
 			filePath: "/path/to/main.hcl",
@@ -72,12 +97,25 @@ func TestConfigAnalyzer_Required(t *testing.T) {
 			filePath: "deployment.yaml",
 			want:     false,
 		},
+		{
+			name:        "file pattern",
+			filePattern: regexp.MustCompile(`foo*`),
+			filePath:    "foo_file",
+			want:        true,
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			a := terraform.ConfigAnalyzer{}
+			a := terraform.NewConfigAnalyzer(tt.filePattern)
 			got := a.Required(tt.filePath, nil)
 			assert.Equal(t, tt.want, got)
 		})
 	}
 }
+
+func Test_TerraformConfigAnalyzer_Type(t *testing.T) {
+	a := terraform.NewConfigAnalyzer(nil)
+	want := analyzer.TypeTerraform
+	got := a.Type()
+	assert.Equal(t, want, got)
+}

pkg/flag/misconf_flags.go

@@ -14,7 +14,7 @@ var (
 		Name:       "file-patterns",
 		ConfigName: "misconfiguration.file-patterns",
 		Value:      []string{},
-		Usage:      "specify config file patterns, available with '--security-checks config'",
+		Usage:      "specify additional config file mathcing in regex format, available with '--security-checks config'",
 	}
 	IncludeNonFailuresFlag = Flag{
 		Name:       "include-non-failures",