/
main.go
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/
main.go
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// Copyright 2020-2024 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 main
import (
"fmt"
"os"
"github.com/bufbuild/buf/private/bufpkg/bufstyle"
"github.com/bufbuild/buf/private/pkg/encoding"
"golang.org/x/tools/go/analysis/multichecker"
)
var externalConfigPath = ".bufstyle.yaml"
func main() {
analyzerProvider, err := newAnalyzerProvider()
if err != nil {
if errString := err.Error(); errString != "" {
fmt.Fprintln(os.Stderr, errString)
}
os.Exit(1)
}
multichecker.Main(analyzerProvider.Analyzers()...)
}
func newAnalyzerProvider() (bufstyle.AnalyzerProvider, error) {
externalConfig, err := readExternalConfig()
if err != nil {
return nil, err
}
ignoreAnalyzerNameToRelFilePaths, err := getIgnoreAnalyzerNameToRelFilePaths(externalConfig)
if err != nil {
return nil, err
}
var analyzerProviderOptions []bufstyle.AnalyzerProviderOption
for analyzerName, relFilePaths := range ignoreAnalyzerNameToRelFilePaths {
for relFilePath := range relFilePaths {
analyzerProviderOptions = append(
analyzerProviderOptions,
bufstyle.WithIgnore(analyzerName, relFilePath),
)
}
}
rootDirPath, err := os.Getwd()
if err != nil {
return nil, err
}
return bufstyle.NewAnalyzerProvider(rootDirPath, analyzerProviderOptions...)
}
func readExternalConfig() (bufstyle.ExternalConfig, error) {
var externalConfig bufstyle.ExternalConfig
data, err := os.ReadFile(externalConfigPath)
if err != nil {
if os.IsNotExist(err) {
return externalConfig, nil
}
return externalConfig, err
}
if err := encoding.UnmarshalYAMLStrict(data, &externalConfig); err != nil {
return externalConfig, err
}
return externalConfig, nil
}
func getIgnoreAnalyzerNameToRelFilePaths(externalConfig bufstyle.ExternalConfig) (map[string]map[string]struct{}, error) {
ignoreAnalyzerNameToRelFilePaths := make(map[string]map[string]struct{})
for analyzerName, relFilePaths := range externalConfig.Ignore {
if len(relFilePaths) == 0 {
return nil, fmt.Errorf("empty ignore file paths")
}
relFilePathMap := make(map[string]struct{})
for _, relFilePath := range relFilePaths {
if _, ok := relFilePathMap[relFilePath]; ok {
return nil, fmt.Errorf("duplicate ignore file path %q for analyzer %q", relFilePath, analyzerName)
}
relFilePathMap[relFilePath] = struct{}{}
}
if _, ok := ignoreAnalyzerNameToRelFilePaths[analyzerName]; ok {
return nil, fmt.Errorf("duplicate ignore analyzer name: %q", analyzerName)
}
ignoreAnalyzerNameToRelFilePaths[analyzerName] = relFilePathMap
}
return ignoreAnalyzerNameToRelFilePaths, nil
}