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// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:process/process.dart';
import '../base/io.dart';
import '../base/user_messages.dart';
import '../base/version.dart';
import '../doctor_validator.dart';
/// A combination of version description and parsed version number.
class _VersionInfo {
/// Constructs a VersionInfo from a version description string.
///
/// This should contain a version number. For example:
/// "clang version 9.0.1-6+build1"
_VersionInfo(this.description) {
final String? versionString = RegExp(r'[0-9]+\.[0-9]+(?:\.[0-9]+)?').firstMatch(description)?.group(0);
number = Version.parse(versionString);
}
// The full info string reported by the binary.
String description;
// The parsed Version.
Version? number;
}
/// A validator that checks for Clang and Make build dependencies.
class LinuxDoctorValidator extends DoctorValidator {
LinuxDoctorValidator({
required ProcessManager processManager,
required UserMessages userMessages,
}) : _processManager = processManager,
_userMessages = userMessages,
super('Linux toolchain - develop for Linux desktop');
final ProcessManager _processManager;
final UserMessages _userMessages;
static const String kClangBinary = 'clang++';
static const String kCmakeBinary = 'cmake';
static const String kNinjaBinary = 'ninja';
static const String kPkgConfigBinary = 'pkg-config';
final Map<String, Version> _requiredBinaryVersions = <String, Version>{
kClangBinary: Version(3, 4, 0),
kCmakeBinary: Version(3, 10, 0),
kNinjaBinary: Version(1, 8, 0),
kPkgConfigBinary: Version(0, 29, 0),
};
final List<String> _requiredGtkLibraries = <String>[
'gtk+-3.0',
'glib-2.0',
'gio-2.0',
];
@override
Future<ValidationResult> validate() async {
ValidationType validationType = ValidationType.installed;
final List<ValidationMessage> messages = <ValidationMessage>[];
final Map<String, _VersionInfo?> installedVersions = <String, _VersionInfo?>{
// Sort the check to make the call order predictable for unit tests.
for (String binary in _requiredBinaryVersions.keys.toList()..sort())
binary: await _getBinaryVersion(binary)
};
// Determine overall validation level.
if (installedVersions.values.any((_VersionInfo? versionInfo) => versionInfo?.number == null)) {
validationType = ValidationType.missing;
} else if (installedVersions.keys.any((String binary) =>
installedVersions[binary]!.number! < _requiredBinaryVersions[binary]!)) {
validationType = ValidationType.partial;
}
// Message for Clang.
{
final _VersionInfo? version = installedVersions[kClangBinary];
if (version == null || version.number == null) {
messages.add(ValidationMessage.error(_userMessages.clangMissing));
} else {
assert(_requiredBinaryVersions.containsKey(kClangBinary));
messages.add(ValidationMessage(version.description));
final Version requiredVersion = _requiredBinaryVersions[kClangBinary]!;
if (version.number! < requiredVersion) {
messages.add(ValidationMessage.error(_userMessages.clangTooOld(requiredVersion.toString())));
}
}
}
// Message for CMake.
{
final _VersionInfo? version = installedVersions[kCmakeBinary];
if (version == null || version.number == null) {
messages.add(ValidationMessage.error(_userMessages.cmakeMissing));
} else {
assert(_requiredBinaryVersions.containsKey(kCmakeBinary));
messages.add(ValidationMessage(version.description));
final Version requiredVersion = _requiredBinaryVersions[kCmakeBinary]!;
if (version.number! < requiredVersion) {
messages.add(ValidationMessage.error(_userMessages.cmakeTooOld(requiredVersion.toString())));
}
}
}
// Message for ninja.
{
final _VersionInfo? version = installedVersions[kNinjaBinary];
if (version == null || version.number == null) {
messages.add(ValidationMessage.error(_userMessages.ninjaMissing));
} else {
assert(_requiredBinaryVersions.containsKey(kNinjaBinary));
// The full version description is just the number, so add context.
messages.add(ValidationMessage(_userMessages.ninjaVersion(version.description)));
final Version requiredVersion = _requiredBinaryVersions[kNinjaBinary]!;
if (version.number! < requiredVersion) {
messages.add(ValidationMessage.error(_userMessages.ninjaTooOld(requiredVersion.toString())));
}
}
}
// Message for pkg-config.
{
final _VersionInfo? version = installedVersions[kPkgConfigBinary];
if (version == null || version.number == null) {
messages.add(ValidationMessage.error(_userMessages.pkgConfigMissing));
} else {
assert(_requiredBinaryVersions.containsKey(kPkgConfigBinary));
// The full version description is just the number, so add context.
messages.add(ValidationMessage(_userMessages.pkgConfigVersion(version.description)));
final Version requiredVersion = _requiredBinaryVersions[kPkgConfigBinary]!;
if (version.number! < requiredVersion) {
messages.add(ValidationMessage.error(_userMessages.pkgConfigTooOld(requiredVersion.toString())));
}
}
}
// Messages for libraries.
{
bool libraryMissing = false;
for (final String library in _requiredGtkLibraries) {
if (!await _libraryIsPresent(library)) {
libraryMissing = true;
break;
}
}
if (libraryMissing) {
validationType = ValidationType.missing;
messages.add(ValidationMessage.error(_userMessages.gtkLibrariesMissing));
}
}
return ValidationResult(validationType, messages);
}
/// Returns the installed version of [binary], or null if it's not installed.
///
/// Requires tha [binary] take a '--version' flag, and print a version of the
/// form x.y.z somewhere on the first line of output.
Future<_VersionInfo?> _getBinaryVersion(String binary) async {
ProcessResult? result;
try {
result = await _processManager.run(<String>[
binary,
'--version',
]);
} on ArgumentError {
// ignore error.
}
if (result == null || result.exitCode != 0) {
return null;
}
final String firstLine = (result.stdout as String).split('\n').first.trim();
return _VersionInfo(firstLine);
}
/// Checks that [library] is available via pkg-config.
Future<bool> _libraryIsPresent(String library) async {
ProcessResult? result;
try {
result = await _processManager.run(<String>[
'pkg-config',
'--exists',
library,
]);
} on ArgumentError {
// ignore error.
}
return (result?.exitCode ?? 1) == 0;
}
}