Merge pull request #8 from gostaticanalysis/add-flag-for-plugin

Add flags for plugin

README.md

@@ -96,3 +96,10 @@ The main.go can be built as a plugin for [golangci-lint](https://golangci-lint.r
 $ skeleton pkgname
 $ go build -buildmode=plugin -o path_to_plugin_dir importpath
 ```
+
+If you would like to specify flags for your plugin, you can put them via `ldflags` as below.
+
+```
+$ skeleton pkgname
+$ go build -buildmode=plugin -ldflags "-X 'main.flags=-funcs log.Fatal'" -o path_to_plugin_dir github.com/gostaticanalysis/called/plugin/called
+```

template.go

@@ -86,16 +86,29 @@ var pluginMainTempl = template.Must(template.New("main.go").Parse(`// This file
 package main
 
 import (
+	"strings"
+
 	"{{.ImportPath}}"
 	"golang.org/x/tools/go/analysis"
 )
 
+// flags for Analyzer.Flag.
+// If you would like to specify flags for your plugin, you can put them via `ldflags` as below.
+//     $ go build -buildmode=plugin -ldflags "-X 'main.flags=-opt val'" {{.ImportPath}}/plugin/{{.Pkg}
+var flags string
+
 // AnalyzerPlugin provides analyzers as a plugin.
 // It follows golangci-lint style plugin.
 var AnalyzerPlugin analyzerPlugin
 
 type analyzerPlugin struct{}
 func (analyzerPlugin) GetAnalyzers() []*analysis.Analyzer {
+	if flags != "" {
+		flagset := {{.Pkg}}.Analyzer.Flags
+		if err := flagset.Parse(strings.Split(flags, " ")); err != nil {
+			panic("cannot parse flags of {{.Pkg}}: "+err.Error())
+		}
+	}
 	return []*analysis.Analyzer{
 		{{.Pkg}}.Analyzer,
 	}