flutter_oss_licenses 3.0.2

A tool to generate detail and better OSS license list using pubspec.yaml/lock files.

example/lib/main.dart

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';

import 'oss_licenses.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Licenses',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const OssLicensesPage(),
    );
  }
}

class OssLicensesPage extends StatelessWidget {
  const OssLicensesPage({super.key});

  static Future<List<Package>> loadLicenses() async {
    // merging non-dart dependency list using LicenseRegistry.
    final lm = <String, List<String>>{};
    await for (var l in LicenseRegistry.licenses) {
      for (var p in l.packages) {
        final lp = lm.putIfAbsent(p, () => []);
        lp.addAll(l.paragraphs.map((p) => p.text));
      }
    }
    final licenses = allDependencies.toList();
    for (var key in lm.keys) {
      licenses.add(Package(
        name: key,
        description: '',
        authors: [],
        version: '',
        license: lm[key]!.join('\n\n'),
        isMarkdown: false,
        isSdk: false,
        dependencies: [],
      ));
    }
    return licenses..sort((a, b) => a.name.compareTo(b.name));
  }

  static final _licenses = loadLicenses();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: const Text('Open Source Licenses'),
        ),
        body: FutureBuilder<List<Package>>(
            future: _licenses,
            initialData: const [],
            builder: (context, snapshot) {
              return ListView.separated(
                  padding: const EdgeInsets.all(0),
                  itemCount: snapshot.data?.length ?? 0,
                  itemBuilder: (context, index) {
                    final package = snapshot.data![index];
                    return ListTile(
                      title: Text('${package.name} ${package.version}'),
                      subtitle: package.description.isNotEmpty ? Text(package.description) : null,
                      trailing: const Icon(Icons.chevron_right),
                      onTap: () => Navigator.of(context).push(
                        MaterialPageRoute(
                          builder: (context) => MiscOssLicenseSingle(package: package),
                        ),
                      ),
                    );
                  },
                  separatorBuilder: (context, index) => const Divider());
            }));
  }
}

class MiscOssLicenseSingle extends StatelessWidget {
  final Package package;

  const MiscOssLicenseSingle({super.key, required this.package});

  String _bodyText() {
    return package.license!.split('\n').map((line) {
      if (line.startsWith('//')) line = line.substring(2);
      line = line.trim();
      return line;
    }).join('\n');
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('${package.name} ${package.version}')),
      body: Container(
          color: Theme.of(context).canvasColor,
          child: ListView(children: <Widget>[
            if (package.description.isNotEmpty)
              Padding(
                  padding: const EdgeInsets.only(top: 12.0, left: 12.0, right: 12.0),
                  child: Text(package.description,
                      style: Theme.of(context).textTheme.bodyMedium!.copyWith(fontWeight: FontWeight.bold))),
            if (package.homepage != null)
              Padding(
                  padding: const EdgeInsets.only(top: 12.0, left: 12.0, right: 12.0),
                  child: InkWell(
                    child: Text(package.homepage!,
                        style: const TextStyle(color: Colors.blue, decoration: TextDecoration.underline)),
                    onTap: () => launch(package.homepage!),
                  )),
            if (package.description.isNotEmpty || package.homepage != null) const Divider(),
            Padding(
              padding: const EdgeInsets.only(top: 12.0, left: 12.0, right: 12.0),
              child: Text(_bodyText(), style: Theme.of(context).textTheme.bodyMedium),
            ),
          ])),
    );
  }
}