sample: add license to the generated sample files

cmd/gen-go-sample/main.go

@@ -24,10 +24,12 @@ import (
 	"os"
 	"sort"
 	"strings"
+	"time"
 
 	"github.com/golang/protobuf/proto"
 	"github.com/golang/protobuf/protoc-gen-go/descriptor"
 	"github.com/googleapis/gapic-generator-go/internal/errors"
+	"github.com/googleapis/gapic-generator-go/internal/license"
 	"github.com/googleapis/gapic-generator-go/internal/pbinfo"
 	"github.com/googleapis/gapic-generator-go/internal/printer"
 	yaml "gopkg.in/yaml.v2"
@@ -144,8 +146,8 @@ func (g *generator) commit(gofmt bool) error {
 
 	firstNonStd := sort.Search(len(imports), func(i int) bool { return strings.IndexByte(imports[i].Path, '.') >= 0 })
 
-	// TODO(pongad): add license
 	var file bytes.Buffer
+	fmt.Fprintf(&file, license.Apache, time.Now().Year())
 	file.WriteString("package main\n")
 	file.WriteString("import(\n")
 	for i, imp := range imports {

gengapic/doc_file.go

@@ -19,6 +19,7 @@ import (
 
 	"github.com/golang/protobuf/proto"
 	"github.com/golang/protobuf/protoc-gen-go/descriptor"
+	"github.com/googleapis/gapic-generator-go/internal/license"
 	"google.golang.org/genproto/googleapis/api/annotations"
 )
 
@@ -29,7 +30,7 @@ import (
 func (g *generator) genDocFile(pkgPath, pkgName string, year int, scopes []string) {
 	p := g.printf
 
-	p(apacheLicense, year)
+	p(license.Apache, year)
 	p("")
 
 	p("// Package %s is an auto-generated package for the", pkgName)

gengapic/gengapic.go

@@ -27,6 +27,7 @@ import (
 	"github.com/golang/protobuf/protoc-gen-go/descriptor"
 	plugin "github.com/golang/protobuf/protoc-gen-go/plugin"
 	"github.com/googleapis/gapic-generator-go/internal/errors"
+	"github.com/googleapis/gapic-generator-go/internal/license"
 	"github.com/googleapis/gapic-generator-go/internal/pbinfo"
 	"github.com/googleapis/gapic-generator-go/internal/printer"
 	"google.golang.org/genproto/googleapis/api/annotations"
@@ -178,7 +179,7 @@ func (g *generator) printf(s string, a ...interface{}) {
 
 func (g *generator) commit(fileName, pkgName string) {
 	var header strings.Builder
-	fmt.Fprintf(&header, apacheLicense, time.Now().Year())
+	fmt.Fprintf(&header, license.Apache, time.Now().Year())
 	fmt.Fprintf(&header, "package %s\n\n", pkgName)
 
 	var imps []pbinfo.ImportSpec

gengapic/license.go → internal/license/license.go

@@ -12,9 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package gengapic
+package license
 
-const apacheLicense = `// Copyright %d Google LLC
+const Apache = `// Copyright %d Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.