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forgejo/modules/migration/file_format.go
Aravinth Manivannan 3bb028cc46
Validate migration files (#18203)
JSON Schema validation for data used by Gitea during migrations

Discussion at https://forum.forgefriends.org/t/common-json-schema-for-repository-information/563

Co-authored-by: Loïc Dachary <loic@dachary.org>
2022-01-26 10:45:51 +01:00

112 lines
2.3 KiB
Go

// Copyright 2022 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package migration
import (
"fmt"
"os"
"strings"
"code.gitea.io/gitea/modules/json"
"code.gitea.io/gitea/modules/log"
"github.com/santhosh-tekuri/jsonschema/v5"
"gopkg.in/yaml.v2"
)
// Load project data from file, with optional validation
func Load(filename string, data interface{}, validation bool) error {
isJSON := strings.HasSuffix(filename, ".json")
bs, err := os.ReadFile(filename)
if err != nil {
return err
}
if validation {
err := validate(bs, data, isJSON)
if err != nil {
return err
}
}
return unmarshal(bs, data, isJSON)
}
func unmarshal(bs []byte, data interface{}, isJSON bool) error {
if isJSON {
return json.Unmarshal(bs, data)
}
return yaml.Unmarshal(bs, data)
}
func getSchema(filename string) (*jsonschema.Schema, error) {
c := jsonschema.NewCompiler()
c.LoadURL = openSchema
return c.Compile(filename)
}
func validate(bs []byte, datatype interface{}, isJSON bool) error {
var v interface{}
err := unmarshal(bs, &v, isJSON)
if err != nil {
return err
}
if !isJSON {
v, err = toStringKeys(v)
if err != nil {
return err
}
}
var schemaFilename string
switch datatype := datatype.(type) {
case *[]*Issue:
schemaFilename = "issue.json"
case *[]*Milestone:
schemaFilename = "milestone.json"
default:
return fmt.Errorf("file_format:validate: %T has not a validation implemented", datatype)
}
sch, err := getSchema(schemaFilename)
if err != nil {
return err
}
err = sch.Validate(v)
if err != nil {
log.Error("migration validation with %s failed for\n%s", schemaFilename, string(bs))
}
return err
}
func toStringKeys(val interface{}) (interface{}, error) {
var err error
switch val := val.(type) {
case map[interface{}]interface{}:
m := make(map[string]interface{})
for k, v := range val {
k, ok := k.(string)
if !ok {
return nil, fmt.Errorf("found non-string key %T %s", k, k)
}
m[k], err = toStringKeys(v)
if err != nil {
return nil, err
}
}
return m, nil
case []interface{}:
l := make([]interface{}, len(val))
for i, v := range val {
l[i], err = toStringKeys(v)
if err != nil {
return nil, err
}
}
return l, nil
default:
return val, nil
}
}