add fieldaligment

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

fiealaligment.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"log"
+	"os"
+
+	"golang.org/x/tools/go/analysis/passes/fieldalignment"
+	"golang.org/x/tools/go/analysis/singlechecker"
+	"google.golang.org/protobuf/compiler/protogen"
+)
+
+func (g *Generator) fieldAlign(plugin *protogen.Plugin) error {
+	if !g.fieldaligment {
+		return nil
+	}
+
+	log.Printf("%v\n", []string{"fieldalignment", "-fix", g.tagPath})
+	origArgs := os.Args
+	os.Args = []string{"fieldalignment", "-fix", g.tagPath}
+	singlechecker.Main(fieldalignment.Analyzer)
+	os.Args = origArgs
+
+	return nil
+}