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analyzer_provider.go
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/
analyzer_provider.go
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// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You 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 bufstyle
import (
"path/filepath"
)
import (
"go.uber.org/multierr"
"golang.org/x/tools/go/analysis"
)
type analyzerProvider struct {
absRootDirPath string
ignoreAnalyzerNameToRelFilePaths map[string]map[string]struct{}
}
func newAnalyzerProvider(rootDirPath string, options ...AnalyzerProviderOption) (*analyzerProvider, error) {
if rootDirPath == "" {
rootDirPath = "."
}
absRootDirPath, err := filepath.Abs(rootDirPath)
if err != nil {
return nil, err
}
analyzerProvider := &analyzerProvider{
absRootDirPath: absRootDirPath,
ignoreAnalyzerNameToRelFilePaths: make(map[string]map[string]struct{}),
}
for _, option := range options {
option(analyzerProvider)
}
return analyzerProvider, nil
}
func (a *analyzerProvider) Analyzers() []*analysis.Analyzer {
analyzers := newAnalyzers()
for _, analyzer := range analyzers {
a.modifyAnalyzer(analyzer)
for _, requireAnalyzer := range analyzer.Requires {
a.modifyAnalyzer(requireAnalyzer)
}
}
return analyzers
}
func (a *analyzerProvider) modifyAnalyzer(analyzer *analysis.Analyzer) {
if analyzer.Run == nil {
return
}
oldRun := analyzer.Run
analyzer.Run = func(pass *analysis.Pass) (interface{}, error) {
oldReport := pass.Report
var reportErr error
pass.Report = func(diagnostic analysis.Diagnostic) {
if pass.Fset == nil {
oldReport(diagnostic)
return
}
relFilePaths, ok := a.ignoreAnalyzerNameToRelFilePaths[analyzer.Name]
if !ok {
oldReport(diagnostic)
return
}
position := pass.Fset.Position(diagnostic.Pos)
filePath := position.Filename
if filePath == "" {
oldReport(diagnostic)
return
}
absFilePath, err := filepath.Abs(position.Filename)
if err != nil {
reportErr = multierr.Append(reportErr, err)
return
}
relFilePath, err := filepath.Rel(a.absRootDirPath, absFilePath)
if err != nil {
reportErr = multierr.Append(reportErr, err)
return
}
if _, ok := relFilePaths[relFilePath]; !ok {
oldReport(diagnostic)
}
}
if reportErr != nil {
return nil, reportErr
}
return oldRun(pass)
}
}