add -ignore-filename-pattern option

Readme.md

@@ -51,6 +51,8 @@ Usage: ./bin/kubeconform [OPTION]... [FILE OR FOLDER]...
   -exit-on-error
         immediately stop execution when the first error is encountered
   -h    show help information
+  -ignore-filename-pattern value
+        regular expression specifying paths to ignore (can be specified multiple times)
   -ignore-missing-schemas
         skip files with missing schemas instead of failing
   -insecure-skip-tls-verify

acceptance.bats

@@ -166,3 +166,9 @@
   [ "$status" -eq 1 ]
   [ "$output" = "fixtures/valid.yaml - ReplicationController bob failed validation: prohibited resource kind ReplicationController" ]
 }
+
+@test "Ignores file that match the --ignore-filename-pattern given" {
+  run bin/kubeconform -summary --ignore-filename-pattern 'crd' --ignore-filename-pattern '.*invalid.*' fixtures/multi_invalid.yaml fixtures/list_invalid.yaml fixtures/quantity.yaml fixtures/crd_schema.yaml
+  [ "$status" -eq 0 ]
+  [ "$output" = "Summary: 1 resource found in 1 file - Valid: 1, Invalid: 0, Errors: 0 Skipped: 0" ]
+}

cmd/kubeconform/main.go

@@ -169,7 +169,7 @@ func realMain() int {
 	if isStdin {
 		resourcesChan, errors = resource.FromStream(ctx, "stdin", os.Stdin)
 	} else {
-		resourcesChan, errors = resource.FromFiles(ctx, cfg.Files...)
+		resourcesChan, errors = resource.FromFiles(ctx, cfg.IgnoreFilenamePatterns, cfg.Files...)
 	}
 
 	c := cache.New()

pkg/config/config.go

@@ -22,6 +22,7 @@ type Config struct {
 	Strict                 bool
 	Verbose                bool
 	IgnoreMissingSchemas   bool
+	IgnoreFilenamePatterns []string
 	Help                   bool
 }
 
@@ -50,7 +51,7 @@ func splitCSV(csvStr string) map[string]bool {
 }
 
 func FromFlags(progName string, args []string) (Config, string, error) {
-	var schemaLocationsParam arrayParam
+	var schemaLocationsParam, ignoreFilenamePatterns arrayParam
 	var skipKindsCSV, rejectKindsCSV string
 	flags := flag.NewFlagSet(progName, flag.ExitOnError)
 	var buf bytes.Buffer
@@ -65,6 +66,7 @@ func FromFlags(progName string, args []string) (Config, string, error) {
 	flags.StringVar(&rejectKindsCSV, "reject", "", "comma-separated list of kinds to reject")
 	flags.BoolVar(&c.ExitOnError, "exit-on-error", false, "immediately stop execution when the first error is encountered")
 	flags.BoolVar(&c.IgnoreMissingSchemas, "ignore-missing-schemas", false, "skip files with missing schemas instead of failing")
+	flags.Var(&ignoreFilenamePatterns, "ignore-filename-pattern", "regular expression specifying paths to ignore (can be specified multiple times)")
 	flags.BoolVar(&c.Summary, "summary", false, "print a summary at the end")
 	flags.IntVar(&c.NumberOfWorkers, "n", 4, "number of goroutines to run concurrently")
 	flags.BoolVar(&c.Strict, "strict", false, "disallow additional properties not in schema")
@@ -83,6 +85,7 @@ func FromFlags(progName string, args []string) (Config, string, error) {
 
 	c.SkipKinds = splitCSV(skipKindsCSV)
 	c.RejectKinds = splitCSV(rejectKindsCSV)
+	c.IgnoreFilenamePatterns = ignoreFilenamePatterns
 	c.SchemaLocations = schemaLocationsParam
 	if len(c.SchemaLocations) == 0 {
 		c.SchemaLocations = append(c.SchemaLocations, "https://kubernetesjsonschema.dev") // if not specified, default behaviour is to use kubernetesjson-schema.dev as registry

pkg/resource/files.go

@@ -7,6 +7,7 @@ import (
 	"io/ioutil"
 	"os"
 	"path/filepath"
+	"regexp"
 	"strings"
 )
 
@@ -27,7 +28,20 @@ func (de DiscoveryError) Error() string {
 	return de.Err.Error()
 }
 
-func FromFiles(ctx context.Context, paths ...string) (<-chan Resource, <-chan error) {
+func isIgnored(path string, ignoreFilePatterns []string) (bool, error) {
+	for _, p := range ignoreFilePatterns {
+		m, err := regexp.MatchString(p, path)
+		if err != nil {
+			return false, err
+		}
+		if m {
+			return true, nil
+		}
+	}
+	return false, nil
+}
+
+func FromFiles(ctx context.Context, ignoreFilePatterns []string, paths ...string) (<-chan Resource, <-chan error) {
 	resources := make(chan Resource)
 	errors := make(chan error)
 	stop := false
@@ -53,6 +67,14 @@ func FromFiles(ctx context.Context, paths ...string) (<-chan Resource, <-chan er
 					return nil
 				}
 
+				ignored, err := isIgnored(path, ignoreFilePatterns)
+				if err != nil {
+					return err
+				}
+				if ignored {
+					return nil
+				}
+
 				f, err := os.Open(p)
 				if err != nil {
 					return err