license metadata text notice files
Introduce the below command-line tool:
textnotice outputs a NOTICE text file constructed from the license
texts of the transitive closure of dependencies.
Bug: 68860345
Bug: 151177513
Bug: 151953481
Bug: 213388645
Bug: 210912771
Test: m all
Test: m systemlicense
Test: m textnotice; out/soong/host/linux-x85/textnotice ...
where ... is the path to the .meta_lic file for the system image. In my
case if
$ export PRODUCT=$(realpath $ANDROID_PRODUCT_OUT --relative-to=$PWD)
... can be expressed as:
${PRODUCT}/gen/META/lic_intermediates/${PRODUCT}/system.img.meta_lic
Change-Id: Ia691869fd8e58ef008024f48c23b1a4b4435677a
diff --git a/tools/compliance/cmd/textnotice.go b/tools/compliance/cmd/textnotice.go
new file mode 100644
index 0000000..91c57b0
--- /dev/null
+++ b/tools/compliance/cmd/textnotice.go
@@ -0,0 +1,153 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
+package main
+
+import (
+ "bytes"
+ "compliance"
+ "flag"
+ "fmt"
+ "io"
+ "io/fs"
+ "os"
+ "path/filepath"
+ "strings"
+)
+
+var (
+ outputFile = flag.String("o", "-", "Where to write the NOTICE text file. (default stdout)")
+ stripPrefix = flag.String("strip_prefix", "", "Prefix to remove from paths. i.e. path to root")
+
+ failNoneRequested = fmt.Errorf("\nNo license metadata files requested")
+ failNoLicenses = fmt.Errorf("No licenses found")
+)
+
+type context struct {
+ stdout io.Writer
+ stderr io.Writer
+ rootFS fs.FS
+ stripPrefix string
+}
+
+func init() {
+ flag.Usage = func() {
+ fmt.Fprintf(os.Stderr, `Usage: %s {options} file.meta_lic {file.meta_lic...}
+
+Outputs a text NOTICE file.
+
+Options:
+`, filepath.Base(os.Args[0]))
+ flag.PrintDefaults()
+ }
+}
+
+func main() {
+ flag.Parse()
+
+ // Must specify at least one root target.
+ if flag.NArg() == 0 {
+ flag.Usage()
+ os.Exit(2)
+ }
+
+ if len(*outputFile) == 0 {
+ flag.Usage()
+ fmt.Fprintf(os.Stderr, "must specify file for -o; use - for stdout\n")
+ os.Exit(2)
+ } else {
+ dir, err := filepath.Abs(filepath.Dir(*outputFile))
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "cannot determine path to %q: %w\n", *outputFile, err)
+ os.Exit(1)
+ }
+ fi, err := os.Stat(dir)
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "cannot read directory %q of %q: %w\n", dir, *outputFile, err)
+ os.Exit(1)
+ }
+ if !fi.IsDir() {
+ fmt.Fprintf(os.Stderr, "parent %q of %q is not a directory\n", dir, *outputFile)
+ os.Exit(1)
+ }
+ }
+
+ var ofile io.Writer
+ ofile = os.Stdout
+ if *outputFile != "-" {
+ ofile = &bytes.Buffer{}
+ }
+
+ ctx := &context{ofile, os.Stderr, os.DirFS("."), *stripPrefix}
+
+ err := textNotice(ctx, flag.Args()...)
+ if err != nil {
+ if err == failNoneRequested {
+ flag.Usage()
+ }
+ fmt.Fprintf(os.Stderr, "%s\n", err.Error())
+ os.Exit(1)
+ }
+ if *outputFile != "-" {
+ err := os.WriteFile(*outputFile, ofile.(*bytes.Buffer).Bytes(), 0666)
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "could not write output to %q: %w\n", *outputFile, err)
+ os.Exit(1)
+ }
+ }
+ os.Exit(0)
+}
+
+// textNotice implements the textNotice utility.
+func textNotice(ctx *context, files ...string) error {
+ // Must be at least one root file.
+ if len(files) < 1 {
+ return failNoneRequested
+ }
+
+ // Read the license graph from the license metadata files (*.meta_lic).
+ licenseGraph, err := compliance.ReadLicenseGraph(ctx.rootFS, ctx.stderr, files)
+ if err != nil {
+ return fmt.Errorf("Unable to read license metadata file(s) %q: %v\n", files, err)
+ }
+ if licenseGraph == nil {
+ return failNoLicenses
+ }
+
+ // rs contains all notice resolutions.
+ rs := compliance.ResolveNotices(licenseGraph)
+
+ ni, err := compliance.IndexLicenseTexts(ctx.rootFS, licenseGraph, rs)
+ if err != nil {
+ return fmt.Errorf("Unable to read license text file(s) for %q: %v\n", files, err)
+ }
+
+ for h := range ni.Hashes() {
+ fmt.Fprintln(ctx.stdout, "==============================================================================")
+ for _, libName := range ni.HashLibs(h) {
+ fmt.Fprintf(ctx.stdout, "%s used by:\n", libName)
+ for _, installPath := range ni.HashLibInstalls(h, libName) {
+ if 0 < len(ctx.stripPrefix) && strings.HasPrefix(installPath, ctx.stripPrefix) {
+ fmt.Fprintf(ctx.stdout, " %s\n", installPath[len(ctx.stripPrefix):])
+ } else {
+ fmt.Fprintf(ctx.stdout, " %s\n", installPath)
+ }
+ }
+ fmt.Fprintln(ctx.stdout)
+ }
+ ctx.stdout.Write(ni.HashText(h))
+ fmt.Fprintln(ctx.stdout)
+ }
+ return nil
+}