Merge "Tool to create license metadata for copied target."

func licensesMakeVarsProvider(ctx MakeVarsContext) {

	ctx.Strict("BUILD_LICENSE_METADATA",

		ctx.Config().HostToolPath(ctx, "build_license_metadata").String())

	ctx.Strict("COPY_LICENSE_METADATA",

		ctx.Config().HostToolPath(ctx, "copy_license_metadata").String())

	ctx.Strict("HTMLNOTICE", ctx.Config().HostToolPath(ctx, "htmlnotice").String())

	ctx.Strict("XMLNOTICE", ctx.Config().HostToolPath(ctx, "xmlnotice").String())

	ctx.Strict("TEXTNOTICE", ctx.Config().HostToolPath(ctx, "textnotice").String())

// Copyright 2022 Google Inc. All rights reserved.

//

// 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 {

    default_applicable_licenses: ["Android-Apache-2.0"],

}

blueprint_go_binary {

    name: "copy_license_metadata",

    srcs: [

        "copy_license_metadata.go",

    ],

    deps: [

        "license_metadata_proto",

        "golang-protobuf-proto",

        "golang-protobuf-encoding-prototext",

        "soong-response",

    ],

}

// Copyright 2022 Google Inc. All rights reserved.

//

// 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 (

	"flag"

	"fmt"

	"io/ioutil"

	"os"

	"strings"

	"google.golang.org/protobuf/encoding/prototext"

	"google.golang.org/protobuf/proto"

	"android/soong/compliance/license_metadata_proto"

	"android/soong/response"

)

func newMultiString(flags *flag.FlagSet, name, usage string) *multiString {

	var f multiString

	flags.Var(&f, name, usage)

	return &f

}

type multiString []string

func (ms *multiString) String() string     { return strings.Join(*ms, ", ") }

func (ms *multiString) Set(s string) error { *ms = append(*ms, s); return nil }

func main() {

	var expandedArgs []string

	for _, arg := range os.Args[1:] {

		if strings.HasPrefix(arg, "@") {

			f, err := os.Open(strings.TrimPrefix(arg, "@"))

			if err != nil {

				fmt.Fprintln(os.Stderr, err.Error())

				os.Exit(1)

			}

			respArgs, err := response.ReadRspFile(f)

			f.Close()

			if err != nil {

				fmt.Fprintln(os.Stderr, err.Error())

				os.Exit(1)

			}

			expandedArgs = append(expandedArgs, respArgs...)

		} else {

			expandedArgs = append(expandedArgs, arg)

		}

	}

	flags := flag.NewFlagSet("flags", flag.ExitOnError)

	installed := flags.String("i", "", "installed target")

	sources := newMultiString(flags, "s", "source (input) file")

	dep := flags.String("d", "", "license metadata file dependency")

	outFile := flags.String("o", "", "output file")

	flags.Parse(expandedArgs)

	if len(*dep) == 0 || len(*installed) == 0 || len(*sources) == 0 {

		flags.Usage()

		if len(*dep) == 0 {

			fmt.Fprintf(os.Stderr, "source license metadata (-d flag) required\n")

		}

		if len(*sources) == 0 {

			fmt.Fprintf(os.Stderr, "source copy (-s flag required\n")

		}

		if len(*installed) == 0 {

			fmt.Fprintf(os.Stderr, "installed copy (-i flag) required\n")

		}

		os.Exit(1)

	}

	src_metadata := license_metadata_proto.LicenseMetadata{}

	err := readMetadata(*dep, &src_metadata)

	if err != nil {

		fmt.Fprintf(os.Stderr, "error: %s\n", err.Error())

		os.Exit(2)

	}

	metadata := src_metadata

	metadata.Built = nil

	metadata.InstallMap = nil

	metadata.Installed = []string{*installed}

	metadata.Sources = *sources

	metadata.Deps = []*license_metadata_proto.AnnotatedDependency{&license_metadata_proto.AnnotatedDependency{

		File:        proto.String(*dep),

		Annotations: []string{"static"},

	}}

	err = writeMetadata(*outFile, &metadata)

	if err != nil {

		fmt.Fprintf(os.Stderr, "error: %s\n", err.Error())

		os.Exit(2)

	}

}

func readMetadata(file string, metadata *license_metadata_proto.LicenseMetadata) error {

	if file == "" {

		return fmt.Errorf("source metadata file (-d) required")

	}

	buf, err := ioutil.ReadFile(file)

	if err != nil {

		return fmt.Errorf("error reading textproto %q: %w", file, err)

	}

	err = prototext.Unmarshal(buf, metadata)

	if err != nil {

		return fmt.Errorf("error unmarshalling textproto: %w", err)

	}

	return nil

}

func writeMetadata(file string, metadata *license_metadata_proto.LicenseMetadata) error {

	buf, err := prototext.MarshalOptions{Multiline: true}.Marshal(metadata)

	if err != nil {

		return fmt.Errorf("error marshalling textproto: %w", err)

	}

	if file != "" {

		err = ioutil.WriteFile(file, buf, 0666)

		if err != nil {

			return fmt.Errorf("error writing textproto %q: %w", file, err)

		}

	} else {

		_, _ = os.Stdout.Write(buf)

	}

	return nil

}