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[frdb] Add support for env connection variable. (#18429)

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Similar to the flutter driver, now the fuchsia_remote_debug_protocol can
connect via an environment variable. This can also be used to point to
the SSH config location.

This makes it so that tests written using the FRDB do not have to write
extra information about where their device is on the network.
This commit is contained in:
Andrew Davies 2018-06-13 11:37:06 -07:00 committed by GitHub
parent b401e76554
commit 5ed029059e
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1 changed files with 46 additions and 4 deletions
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50
packages/fuchsia_remote_debug_protocol/lib/src/fuchsia_remote_connection.dart
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@ -13,9 +13,9 @@ import 'common/network.dart';
import 'dart/dart_vm.dart';
import 'runners/ssh_command_runner.dart';
final String _ipv4Loopback = InternetAddress.LOOPBACK_IP_V4.address; // ignore: deprecated_member_use
final String _ipv4Loopback = InternetAddress.loopbackIPv4.address;
final String _ipv6Loopback = InternetAddress.LOOPBACK_IP_V6.address; // ignore: deprecated_member_use
final String _ipv6Loopback = InternetAddress.loopbackIPv6.address;
const ProcessManager _processManager = const LocalProcessManager();
@ -47,6 +47,21 @@ void restoreFuchsiaPortForwardingFunction() {
fuchsiaPortForwardingFunction = _SshPortForwarder.start;
}
/// A general error raised when something fails within a
/// [FuchsiaRemoteConnection].
class FuchsiaRemoteConnectionError extends Error {
/// Basic constructor outlining the reason for the failure in `message`.
FuchsiaRemoteConnectionError(this.message);
/// The reason for the failure.
final String message;
@override
String toString() {
return '$FuchsiaRemoteConnectionError: $message';
}
}
/// An enum specifying a Dart VM's state.
enum DartVmEventType {
/// The Dart VM has started.
@ -157,11 +172,38 @@ class FuchsiaRemoteConnection {
/// then `interface` will probably need to be set in order to connect
/// successfully (that being the outgoing interface of your machine, not the
/// interface on the target machine).
static Future<FuchsiaRemoteConnection> connect(
String address, [
///
/// Attempts to set `address` via the environment variable
/// `FUCHSIA_DEVICE_URL` in the event that the argument is not passed.
/// If `address` is not supplied, `interface` is also ignored, as the format
/// is expected to contain the interface as well (in the event that it is
/// link-local), like the following:
///
/// ```
/// fe80::1%eth0
/// ```
///
/// In the event that `FUCHSIA_SSH_CONFIG` is set in the environment, that
/// will be used when `sshConfigPath` isn't supplied.
static Future<FuchsiaRemoteConnection> connect([
String address,
String interface = '',
String sshConfigPath,
]) async {
address ??= Platform.environment['FUCHSIA_DEVICE_URL'];
sshConfigPath ??= Platform.environment['FUCHSIA_SSH_CONFIG'];
if (address == null) {
throw new FuchsiaRemoteConnectionError(
'No address supplied, and \$FUCHSIA_DEVICE_URL not found.');
}
const String interfaceDelimiter = '%';
if (address.contains(interfaceDelimiter)) {
final List<String> addressAndInterface =
address.split(interfaceDelimiter);
address = addressAndInterface[0];
interface = addressAndInterface[1];
}
return await FuchsiaRemoteConnection.connectWithSshCommandRunner(
new SshCommandRunner(
address: address,