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uuid.go
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uuid.go
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// Copyright 2020 Cruise LLC
//
// 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 modules
import (
"github.com/google/uuid"
"go.starlark.net/starlark"
isopod "github.com/cruise-automation/isopod/pkg"
)
var (
seedUUID = uuid.MustParse("00000000-0000-0000-0000-000000000000")
)
// NewUUIDModule returns a uuid module.
func NewUUIDModule() *isopod.Module {
return &isopod.Module{
Name: "uuid",
Attrs: map[string]starlark.Value{
"v3": starlark.NewBuiltin("uuid.v3", uuidGenerateV3Fn),
"v4": starlark.NewBuiltin("uuid.v4", uuidGenerateV4Fn),
"v5": starlark.NewBuiltin("uuid.v5", uuidGenerateV5Fn),
},
}
}
// uuidGenerateV3Fn is a built-in to generate type 3 UUID digest from input data.
func uuidGenerateV3Fn(t *starlark.Thread, b *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
var v string
if err := starlark.UnpackPositionalArgs(b.Name(), args, nil, 1, &v); err != nil {
return nil, err
}
result := uuid.NewMD5(seedUUID, []byte(v))
return starlark.String(result.String()), nil
}
// uuidGenerateV4Fn is a built-in to generate type 4 UUID.
func uuidGenerateV4Fn(t *starlark.Thread, b *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
return starlark.String(uuid.New().String()), nil
}
// uuidGenerateV3Fn is a built-in to generate type 5 UUID digest from input data.
func uuidGenerateV5Fn(t *starlark.Thread, b *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
var v string
if err := starlark.UnpackPositionalArgs(b.Name(), args, nil, 1, &v); err != nil {
return nil, err
}
result := uuid.NewSHA1(seedUUID, []byte(v))
return starlark.String(result.String()), nil
}