mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-27 20:28:54 +01:00
84 lines
2.4 KiB
Go
84 lines
2.4 KiB
Go
// Copyright 2022 The Ebitengine 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 main
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import (
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"fmt"
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"go/token"
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"reflect"
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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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// imageImportCheckAnalyzer is an analyzer to check whether unexpected `image/*` packages are imported.
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// Importing `image/gif`, `image/jpeg`, and `image/png` registers their recorders at `init` functions, so
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// it affects the result of `image.Decode`. Ebitengine should not have such side-effects.
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var imageImportCheckAnalyzer = &analysis.Analyzer{
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Name: "imageimportcheck",
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Doc: "check importing image/gif, image/jpeg, and image/png packages",
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Run: runImageImportCheck,
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ResultType: reflect.TypeOf(imageImportCheckResult{}),
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}
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type imageImportCheckResult struct {
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Errors []imageImportCheckError
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}
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type imageImportCheckError struct {
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Pos token.Pos
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Import string
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}
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func runImageImportCheck(pass *analysis.Pass) (any, error) {
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pkgPath := pass.Pkg.Path()
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if strings.HasPrefix(pkgPath, "github.com/hajimehoshi/ebiten/v2/examples/") {
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return nil, nil
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}
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if strings.HasSuffix(pkgPath, "_test") {
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return nil, nil
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}
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// TODO: Remove this exception after v3 is released (#2336).
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if pkgPath == "github.com/hajimehoshi/ebiten/v2/ebitenutil" {
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return nil, nil
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}
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var errs []imageImportCheckError
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for _, f := range pass.Files {
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for _, i := range f.Imports {
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path, err := strconv.Unquote(i.Path.Value)
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if err != nil {
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return nil, err
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}
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if path == "image/gif" || path == "image/jpeg" || path == "image/png" {
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err := imageImportCheckError{
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Pos: pass.Fset.File(f.Pos()).Pos(int(i.Pos())),
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Import: path,
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}
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errs = append(errs, err)
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pass.Report(analysis.Diagnostic{
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Pos: err.Pos,
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Message: fmt.Sprintf("unexpected import %q", err.Import),
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})
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}
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}
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}
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return imageImportCheckResult{
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Errors: errs,
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}, nil
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}
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