1 files changed, 92 insertions, 0 deletions
diff --git a/tools/identify_license/identify_license.go b/tools/identify_license/identify_license.go
new file mode 100644
index 0000000..23660dc
--- /dev/null
+++ b/tools/identify_license/identify_license.go
@@ -0,0 +1,92 @@
+// 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 identify_license program tries to identify the license type of an
+// unknown license. The file containing the license text is specified on the
+// command line. Multiple license files can be analyzed with a single command.
+// The type of the license is returned along with the confidence level of the
+// match. The confidence level is between 0.0 and 1.0, with 1.0 indicating an
+// exact match and 0.0 indicating a complete mismatch. The results are sorted
+// by confidence level.
+//
+//	$ identifylicense LICENSE1 LICENSE2
+//	LICENSE2: MIT (confidence: 0.987)
+//	LICENSE1: BSD-2-Clause (confidence: 0.833)
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"sort"
+	"time"
+
+	"github.com/google/licenseclassifier"
+	"github.com/google/licenseclassifier/tools/identify_license/backend"
+)
+
+var (
+	headers       = flag.Bool("headers", false, "match license headers")
+	forbiddenOnly = flag.Bool("forbidden", false, "identify using forbidden licenses archive")
+	threshold     = flag.Float64("threshold", licenseclassifier.DefaultConfidenceThreshold, "confidence threshold")
+	timeout       = flag.Duration("timeout", 24*time.Hour, "timeout before giving up on classifying a file.")
+)
+
+func init() {
+	flag.Usage = func() {
+		fmt.Fprintf(os.Stderr, `Usage: %s <licensefile> ...
+
+Identify an unknown license.
+
+Options:
+`, filepath.Base(os.Args[0]))
+		flag.PrintDefaults()
+	}
+}
+
+func main() {
+	flag.Parse()
+
+	be, err := backend.New(*threshold, *forbiddenOnly)
+	if err != nil {
+		be.Close()
+		log.Fatalf("cannot create license classifier: %v", err)
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), *timeout)
+	defer cancel()
+	if errs := be.ClassifyLicensesWithContext(ctx, flag.Args(), *headers); errs != nil {
+		be.Close()
+		for _, err := range errs {
+			log.Printf("classify license failed: %v", err)
+		}
+		log.Fatal("cannot classify licenses")
+	}
+
+	results := be.GetResults()
+	if len(results) == 0 {
+		be.Close()
+		log.Fatal("Couldn't classify license(s)")
+	}
+
+	sort.Sort(results)
+	for _, r := range results {
+		fmt.Printf("%s: %s (confidence: %v, offset: %v, extent: %v)\n",
+			r.Filename, r.Name, r.Confidence, r.Offset, r.Extent)
+	}
+	be.Close()
+}