/
fileutils.go
244 lines (218 loc) · 5.68 KB
/
fileutils.go
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package cautils
import (
"bytes"
"encoding/json"
"fmt"
"os"
"path/filepath"
"strings"
"github.com/armosec/k8s-interface/workloadinterface"
"github.com/armosec/kubescape/core/cautils/logger"
"github.com/armosec/opa-utils/objectsenvelopes"
"gopkg.in/yaml.v2"
)
var (
YAML_PREFIX = []string{".yaml", ".yml"}
JSON_PREFIX = []string{".json"}
)
type FileFormat string
const (
YAML_FILE_FORMAT FileFormat = "yaml"
JSON_FILE_FORMAT FileFormat = "json"
)
func LoadResourcesFromFiles(inputPatterns []string) (map[string][]workloadinterface.IMetadata, error) {
files, errs := listFiles(inputPatterns)
if len(errs) > 0 {
logger.L().Error(fmt.Sprintf("%v", errs))
}
if len(files) == 0 {
return nil, nil
}
workloads, errs := loadFiles(files)
if len(errs) > 0 {
logger.L().Error(fmt.Sprintf("%v", errs))
}
return workloads, nil
}
func loadFiles(filePaths []string) (map[string][]workloadinterface.IMetadata, []error) {
workloads := make(map[string][]workloadinterface.IMetadata, 0)
errs := []error{}
for i := range filePaths {
f, err := loadFile(filePaths[i])
if err != nil {
errs = append(errs, err)
continue
}
w, e := ReadFile(f, GetFileFormat(filePaths[i]))
errs = append(errs, e...)
if w != nil {
if _, ok := workloads[filePaths[i]]; !ok {
workloads[filePaths[i]] = []workloadinterface.IMetadata{}
}
wSlice := workloads[filePaths[i]]
wSlice = append(wSlice, w...)
workloads[filePaths[i]] = wSlice
}
}
return workloads, errs
}
func loadFile(filePath string) ([]byte, error) {
return os.ReadFile(filePath)
}
func ReadFile(fileContent []byte, fileFromat FileFormat) ([]workloadinterface.IMetadata, []error) {
switch fileFromat {
case YAML_FILE_FORMAT:
return readYamlFile(fileContent)
case JSON_FILE_FORMAT:
return readJsonFile(fileContent)
default:
return nil, nil // []error{fmt.Errorf("file extension %s not supported", fileFromat)}
}
}
func listFiles(patterns []string) ([]string, []error) {
files := []string{}
errs := []error{}
for i := range patterns {
if strings.HasPrefix(patterns[i], "http") {
continue
}
if !filepath.IsAbs(patterns[i]) {
o, _ := os.Getwd()
patterns[i] = filepath.Join(o, patterns[i])
}
if IsFile(patterns[i]) {
files = append(files, patterns[i])
} else {
f, err := glob(filepath.Split(patterns[i])) //filepath.Glob(patterns[i])
if err != nil {
errs = append(errs, err)
} else {
files = append(files, f...)
}
}
}
return files, errs
}
func readYamlFile(yamlFile []byte) ([]workloadinterface.IMetadata, []error) {
errs := []error{}
r := bytes.NewReader(yamlFile)
dec := yaml.NewDecoder(r)
yamlObjs := []workloadinterface.IMetadata{}
var t interface{}
for dec.Decode(&t) == nil {
j := convertYamlToJson(t)
if j == nil {
continue
}
if obj, ok := j.(map[string]interface{}); ok {
if o := objectsenvelopes.NewObject(obj); o != nil {
if o.GetKind() == "List" {
yamlObjs = append(yamlObjs, handleListObject(o)...)
} else {
yamlObjs = append(yamlObjs, o)
}
}
} else {
errs = append(errs, fmt.Errorf("failed to convert yaml file to map[string]interface, file content: %v", j))
}
}
return yamlObjs, errs
}
func readJsonFile(jsonFile []byte) ([]workloadinterface.IMetadata, []error) {
workloads := []workloadinterface.IMetadata{}
var jsonObj interface{}
if err := json.Unmarshal(jsonFile, &jsonObj); err != nil {
return workloads, []error{err}
}
convertJsonToWorkload(jsonObj, &workloads)
return workloads, nil
}
func convertJsonToWorkload(jsonObj interface{}, workloads *[]workloadinterface.IMetadata) {
switch x := jsonObj.(type) {
case map[string]interface{}:
if o := objectsenvelopes.NewObject(x); o != nil {
(*workloads) = append(*workloads, o)
}
case []interface{}:
for i := range x {
convertJsonToWorkload(x[i], workloads)
}
}
}
func convertYamlToJson(i interface{}) interface{} {
switch x := i.(type) {
case map[interface{}]interface{}:
m2 := map[string]interface{}{}
for k, v := range x {
if s, ok := k.(string); ok {
m2[s] = convertYamlToJson(v)
}
}
return m2
case []interface{}:
for i, v := range x {
x[i] = convertYamlToJson(v)
}
}
return i
}
func IsYaml(filePath string) bool {
return StringInSlice(YAML_PREFIX, filepath.Ext(filePath)) != ValueNotFound
}
func IsJson(filePath string) bool {
return StringInSlice(JSON_PREFIX, filepath.Ext(filePath)) != ValueNotFound
}
func glob(root, pattern string) ([]string, error) {
var matches []string
err := filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if info.IsDir() {
return nil
}
if matched, err := filepath.Match(pattern, filepath.Base(path)); err != nil {
return err
} else if matched {
matches = append(matches, path)
}
return nil
})
if err != nil {
return nil, err
}
return matches, nil
}
func IsFile(name string) bool {
if fi, err := os.Stat(name); err == nil {
if fi.Mode().IsRegular() {
return true
}
}
return false
}
func GetFileFormat(filePath string) FileFormat {
if IsYaml(filePath) {
return YAML_FILE_FORMAT
} else if IsJson(filePath) {
return JSON_FILE_FORMAT
} else {
return FileFormat(filePath)
}
}
// handleListObject handle a List manifest
func handleListObject(obj workloadinterface.IMetadata) []workloadinterface.IMetadata {
yamlObjs := []workloadinterface.IMetadata{}
if i, ok := workloadinterface.InspectMap(obj.GetObject(), "items"); ok && i != nil {
if items, ok := i.([]interface{}); ok && items != nil {
for item := range items {
if m, ok := items[item].(map[string]interface{}); ok && m != nil {
if o := objectsenvelopes.NewObject(m); o != nil {
yamlObjs = append(yamlObjs, o)
}
}
}
}
}
return yamlObjs
}