| // Package multichecker defines the main function for an analysis driver |
| // with several analyzers. This package makes it easy for anyone to build |
| // an analysis tool containing just the analyzers they need. |
| package multichecker |
| |
| import ( |
| "flag" |
| "log" |
| |
| "golang.org/x/tools/go/analysis" |
| "golang.org/x/tools/go/analysis/internal/checker" |
| ) |
| |
| func Main(analyzers ...*analysis.Analyzer) { |
| if err := analysis.Validate(analyzers); err != nil { |
| log.Fatal(err) |
| } |
| |
| checker.RegisterFlags() |
| |
| // Connect each analysis flag to the command line as --analysis.flag. |
| enabled := make(map[*analysis.Analyzer]*bool) |
| for _, a := range analyzers { |
| prefix := a.Name + "." |
| |
| // Add --foo.enable flag. |
| enable := new(bool) |
| flag.BoolVar(enable, prefix+"enable", false, "enable only "+a.Name+" analysis") |
| enabled[a] = enable |
| |
| a.Flags.VisitAll(func(f *flag.Flag) { |
| flag.Var(f.Value, prefix+f.Name, f.Usage) |
| }) |
| } |
| |
| flag.Parse() // (ExitOnError) |
| |
| // If any --foo.enable flag is set, |
| // run only those analyzers. |
| var keep []*analysis.Analyzer |
| for _, a := range analyzers { |
| if *enabled[a] { |
| keep = append(keep, a) |
| } |
| } |
| if keep != nil { |
| analyzers = keep |
| } |
| |
| if err := checker.Run(flag.Args(), analyzers); err != nil { |
| log.Fatal(err) |
| } |
| } |