57 lines
1.6 KiB
Go
57 lines
1.6 KiB
Go
// Copyright 2019 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package checkunsafe allows unsafe imports only in files named appropriately.
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package checkunsafe
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import (
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"fmt"
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"path"
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"strconv"
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"strings"
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"golang.org/x/tools/go/analysis"
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)
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// Analyzer defines the entrypoint.
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var Analyzer = &analysis.Analyzer{
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Name: "checkunsafe",
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Doc: "allows unsafe use only in specified files",
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Run: run,
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}
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func run(pass *analysis.Pass) (interface{}, error) {
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for _, f := range pass.Files {
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for _, imp := range f.Imports {
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// Is this an unsafe import?
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pkg, err := strconv.Unquote(imp.Path.Value)
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if err != nil || pkg != "unsafe" {
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continue
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}
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// Extract the filename.
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filename := pass.Fset.File(imp.Pos()).Name()
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// Allow files named _unsafe.go or _test.go to opt out.
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if strings.HasSuffix(filename, "_unsafe.go") || strings.HasSuffix(filename, "_test.go") {
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continue
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}
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// Throw the error.
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pass.Reportf(imp.Pos(), fmt.Sprintf("package unsafe imported by %s; must end with _unsafe.go", path.Base(filename)))
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}
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}
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return nil, nil
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}
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