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tf.go
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tf.go
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// Copyright 2022 Snyk Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tf
import (
"bytes"
"compress/gzip"
_ "embed"
"encoding/json"
"io/ioutil"
"github.com/snyk/policy-engine/pkg/input/schemas"
)
//go:embed aws.json.gz
var awsJsonGz []byte
//go:embed azurerm.json.gz
var azurermJsonGz []byte
//go:embed google.json.gz
var googleJsonGz []byte
var allSchemaFiles [][]byte = [][]byte{
awsJsonGz,
azurermJsonGz,
googleJsonGz,
}
var loadedSchemas map[string]*schemas.Schema = map[string]*schemas.Schema{}
func loadSchema(schemaFile []byte) error {
reader, err := gzip.NewReader(bytes.NewReader(schemaFile))
if err != nil {
return err
}
bytes, err := ioutil.ReadAll(reader)
if err != nil {
return err
}
var schemas map[string]*schemas.Schema
if err := json.Unmarshal(bytes, &schemas); err != nil {
return err
}
for k, schema := range schemas {
loadedSchemas[k] = schema
}
return nil
}
func loadSchemas() error {
for _, schemaFile := range allSchemaFiles {
if err := loadSchema(schemaFile); err != nil {
return nil
}
}
return nil
}
func GetSchema(resourceType string) *schemas.Schema {
if len(loadedSchemas) == 0 {
if err := loadSchemas(); err != nil {
panic(err)
}
}
if schema, ok := loadedSchemas[resourceType]; ok {
return schema
} else {
return nil
}
}