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// Copyright 2020 The gVisor Authors.
//
// 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.
// Binary yamltest does strict yaml parsing and validation.
package main
import (
"encoding/json"
"errors"
"flag"
"fmt"
"os"
"github.com/xeipuuv/gojsonschema"
yaml "gopkg.in/yaml.v2"
)
func fixup(v interface{}) (interface{}, error) {
switch x := v.(type) {
case map[interface{}]interface{}:
// Coerse into a string-based map, required for yaml.
strMap := make(map[string]interface{})
for k, v := range x {
strK, ok := k.(string)
if !ok {
// This cannot be converted to JSON at all.
return nil, fmt.Errorf("invalid key %T in (%#v)", k, x)
}
fv, err := fixup(v)
if err != nil {
return nil, fmt.Errorf(".%s%w", strK, err)
}
strMap[strK] = fv
}
return strMap, nil
case []interface{}:
for i := range x {
fv, err := fixup(x[i])
if err != nil {
return nil, fmt.Errorf("[%d]%w", i, err)
}
x[i] = fv
}
return x, nil
default:
return v, nil
}
}
func loadFile(filename string) (gojsonschema.JSONLoader, error) {
f, err := os.Open(filename)
if err != nil {
return nil, err
}
defer f.Close()
dec := yaml.NewDecoder(f)
dec.SetStrict(true)
var object interface{}
if err := dec.Decode(&object); err != nil {
return nil, err
}
fixedObject, err := fixup(object) // For serialization.
if err != nil {
return nil, err
}
bytes, err := json.Marshal(fixedObject)
if err != nil {
return nil, err
}
return gojsonschema.NewStringLoader(string(bytes)), nil
}
var schema = flag.String("schema", "", "path to JSON schema file.")
func main() {
flag.Parse()
if *schema == "" || len(flag.Args()) == 0 {
flag.Usage()
os.Exit(2)
}
// Construct our schema loader.
schemaLoader := gojsonschema.NewReferenceLoader(fmt.Sprintf("file://%s", *schema))
// Parse all documents.
allErrors := make(map[string][]error)
for _, filename := range flag.Args() {
// Record the filename with an empty slice for below, where
// we will emit all files (even those without any errors).
allErrors[filename] = nil
documentLoader, err := loadFile(filename)
if err != nil {
allErrors[filename] = append(allErrors[filename], err)
continue
}
result, err := gojsonschema.Validate(schemaLoader, documentLoader)
if err != nil {
allErrors[filename] = append(allErrors[filename], err)
continue
}
for _, desc := range result.Errors() {
allErrors[filename] = append(allErrors[filename], errors.New(desc.String()))
}
}
// Print errors in yaml format.
totalErrors := 0
for filename, errs := range allErrors {
totalErrors += len(errs)
if len(errs) == 0 {
fmt.Fprintf(os.Stderr, "%s: ✓\n", filename)
continue
}
fmt.Fprintf(os.Stderr, "%s:\n", filename)
for _, err := range errs {
fmt.Fprintf(os.Stderr, "- %s\n", err)
}
}
if totalErrors != 0 {
os.Exit(1)
}
}
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