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lock_file.go
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/
lock_file.go
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// Copyright 2020-2023 Buf Technologies, Inc.
//
// 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 buflock
import (
"context"
"fmt"
"github.com/bufbuild/buf/private/pkg/encoding"
"github.com/bufbuild/buf/private/pkg/storage"
)
func readConfig(ctx context.Context, readBucket storage.ReadBucket) (_ *Config, retErr error) {
configBytes, err := storage.ReadPath(ctx, readBucket, ExternalConfigFilePath)
if err != nil {
if storage.IsNotExist(err) {
// If the lock file doesn't exist, just return no dependencies.
return &Config{}, nil
}
return nil, fmt.Errorf("failed to read lock file: %w", err)
}
var configVersion ExternalConfigVersion
if err := encoding.UnmarshalYAMLNonStrict(configBytes, &configVersion); err != nil {
return nil, fmt.Errorf("failed to decode lock file as YAML: %w", err)
}
switch configVersion.Version {
case "", V1Beta1Version:
var externalConfig ExternalConfigV1Beta1
if err := encoding.UnmarshalYAMLStrict(configBytes, &externalConfig); err != nil {
return nil, fmt.Errorf("failed to unmarshal lock file at %s: %w", V1Beta1Version, err)
}
config := &Config{}
for _, dep := range externalConfig.Deps {
config.Dependencies = append(config.Dependencies, DependencyForExternalConfigDependencyV1Beta1(dep))
}
return config, nil
case V1Version:
var externalConfig ExternalConfigV1
if err := encoding.UnmarshalYAMLStrict(configBytes, &externalConfig); err != nil {
return nil, fmt.Errorf("failed to unmarshal lock file at %s: %w", V1Version, err)
}
config := &Config{}
for _, dep := range externalConfig.Deps {
config.Dependencies = append(config.Dependencies, DependencyForExternalConfigDependencyV1(dep))
}
return config, nil
default:
return nil, fmt.Errorf("unknown lock file versions %q", configVersion.Version)
}
}
func writeConfig(ctx context.Context, writeBucket storage.WriteBucket, config *Config) error {
externalConfig := ExternalConfigV1{
Version: V1Version,
Deps: make([]ExternalConfigDependencyV1, 0, len(config.Dependencies)),
}
for _, dep := range config.Dependencies {
externalConfig.Deps = append(externalConfig.Deps, ExternalConfigDependencyV1ForDependency(dep))
}
configBytes, err := encoding.MarshalYAML(&externalConfig)
if err != nil {
return fmt.Errorf("failed to marshal lock file: %w", err)
}
if err := storage.PutPath(
ctx,
writeBucket,
ExternalConfigFilePath,
append([]byte(Header), configBytes...),
); err != nil {
return fmt.Errorf("failed to write lock file: %w", err)
}
return nil
}