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118 lines
3 KiB
Go
118 lines
3 KiB
Go
package magic_numbers
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import (
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"flag"
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"go/ast"
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"strings"
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"github.com/tommy-muehle/go-mnd/v2/checks"
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"github.com/tommy-muehle/go-mnd/v2/config"
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"golang.org/x/tools/go/analysis"
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"golang.org/x/tools/go/analysis/passes/inspect"
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"golang.org/x/tools/go/ast/inspector"
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)
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const Doc = `magic number detector`
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var Analyzer = &analysis.Analyzer{
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Name: "mnd",
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Doc: Doc,
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Run: run,
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Flags: options(),
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Requires: []*analysis.Analyzer{inspect.Analyzer},
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RunDespiteErrors: true,
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}
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type Checker interface {
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NodeFilter() []ast.Node
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Check(n ast.Node)
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}
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func options() flag.FlagSet {
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options := flag.NewFlagSet("", flag.ExitOnError)
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options.String("excludes", "", "deprecated: use ignored-files instead")
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options.String("ignored-files", "", "comma separated list of file patterns to exclude from analysis")
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options.String("ignored-functions", "", "comma separated list of function patterns to exclude from analysis")
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options.String("ignored-numbers", "", "comma separated list of numbers to exclude from analysis")
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options.String(
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"checks",
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checks.ArgumentCheck+","+
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checks.CaseCheck+","+
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checks.ConditionCheck+","+
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checks.OperationCheck+","+
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checks.ReturnCheck+","+
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checks.AssignCheck,
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"comma separated list of checks",
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)
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return *options
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}
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func run(pass *analysis.Pass) (interface{}, error) {
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var ignoredFiles string
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ignoredFiles = strings.Join(
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[]string{
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pass.Analyzer.Flags.Lookup("excludes").Value.String(), // is deprecated
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pass.Analyzer.Flags.Lookup("ignored-files").Value.String(),
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},
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",",
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)
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if ignoredFiles == "," {
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ignoredFiles = ""
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}
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conf := config.WithOptions(
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config.WithCustomChecks(pass.Analyzer.Flags.Lookup("checks").Value.String()),
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config.WithIgnoredFiles(ignoredFiles),
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config.WithIgnoredFunctions(pass.Analyzer.Flags.Lookup("ignored-functions").Value.String()),
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config.WithIgnoredNumbers(pass.Analyzer.Flags.Lookup("ignored-numbers").Value.String()),
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)
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var checker []Checker
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if conf.IsCheckEnabled(checks.ArgumentCheck) {
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checker = append(checker, checks.NewArgumentAnalyzer(pass, conf))
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}
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if conf.IsCheckEnabled(checks.CaseCheck) {
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checker = append(checker, checks.NewCaseAnalyzer(pass, conf))
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}
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if conf.IsCheckEnabled(checks.ConditionCheck) {
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checker = append(checker, checks.NewConditionAnalyzer(pass, conf))
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}
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if conf.IsCheckEnabled(checks.OperationCheck) {
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checker = append(checker, checks.NewOperationAnalyzer(pass, conf))
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}
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if conf.IsCheckEnabled(checks.ReturnCheck) {
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checker = append(checker, checks.NewReturnAnalyzer(pass, conf))
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}
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if conf.IsCheckEnabled(checks.AssignCheck) {
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checker = append(checker, checks.NewAssignAnalyzer(pass, conf))
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}
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i := pass.ResultOf[inspect.Analyzer].(*inspector.Inspector)
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for _, c := range checker {
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c := c
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i.Preorder(c.NodeFilter(), func(node ast.Node) {
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for _, exclude := range conf.IgnoredFiles {
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if exclude.String() == "" {
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continue
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}
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if exclude.MatchString(pass.Fset.Position(node.Pos()).Filename) {
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return
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}
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}
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c.Check(node)
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})
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}
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return nil, nil
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}
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