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license_serializer.go
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license_serializer.go
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// Copyright 2017 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// The license_serializer program normalizes and serializes the known
// licenseclassifier licenses into a compressed archive. The hash values for
// the licenses are calculated and added to the archive. These can then be used
// to determine where in unknown text is a good offset to run through the
// Levenshtein Distance algorithm.
package main
import (
"flag"
"fmt"
"log"
"os"
"path/filepath"
"strings"
"github.com/google/licenseclassifier"
"github.com/google/licenseclassifier/serializer"
)
var (
forbiddenOnly = flag.Bool("forbidden", false, "serialize only forbidden licenses")
outputDir = flag.String("output", "", "output directory")
)
func init() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, `Usage: %s [OPTIONS]
Calculate the hash values for files and serialize them into a database.
See go/license-classifier
Options:
`, filepath.Base(os.Args[0]))
flag.PrintDefaults()
}
}
func main() {
flag.Parse()
archiveName := licenseclassifier.LicenseArchive
if *forbiddenOnly {
archiveName = licenseclassifier.ForbiddenLicenseArchive
}
fn := filepath.Join(*outputDir, archiveName)
out, err := os.Create(fn)
if err != nil {
log.Fatalf("error: cannot create file %q: %v", fn, err)
}
defer out.Close()
lics, err := licenseclassifier.ReadLicenseDir()
if err != nil {
log.Fatalf("error: cannot read licenses directory: %v", err)
}
var licenses []string
for _, lic := range lics {
if !*forbiddenOnly || licenseclassifier.LicenseType(strings.TrimSuffix(lic.Name(), ".txt")) == "FORBIDDEN" {
licenses = append(licenses, lic.Name())
}
}
if err := serializer.ArchiveLicenses(licenses, out); err != nil {
log.Fatalf("error: cannot create database: %v", err)
}
}