1 files changed, 140 insertions, 0 deletions
diff --git a/third_party/libwebrtc/build/fuchsia/common.py b/third_party/libwebrtc/build/fuchsia/common.py
new file mode 100644
index 0000000000..99ced81ee9
--- /dev/null
+++ b/third_party/libwebrtc/build/fuchsia/common.py
@@ -0,0 +1,140 @@
+# Copyright 2018 The Chromium 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 logging
+import os
+import platform
+import signal
+import socket
+import subprocess
+import sys
+import time
+import threading
+
+DIR_SOURCE_ROOT = os.path.abspath(
+    os.path.join(os.path.dirname(__file__), os.pardir, os.pardir))
+IMAGES_ROOT = os.path.join(
+    DIR_SOURCE_ROOT, 'third_party', 'fuchsia-sdk', 'images')
+SDK_ROOT = os.path.join(DIR_SOURCE_ROOT, 'third_party', 'fuchsia-sdk', 'sdk')
+
+def EnsurePathExists(path):
+  """Checks that the file |path| exists on the filesystem and returns the path
+  if it does, raising an exception otherwise."""
+
+  if not os.path.exists(path):
+    raise IOError('Missing file: ' + path)
+
+  return path
+
+def GetHostOsFromPlatform():
+  host_platform = sys.platform
+  if host_platform.startswith('linux'):
+    return 'linux'
+  elif host_platform.startswith('darwin'):
+    return 'mac'
+  raise Exception('Unsupported host platform: %s' % host_platform)
+
+def GetHostArchFromPlatform():
+  host_arch = platform.machine()
+  if host_arch == 'x86_64':
+    return 'x64'
+  elif host_arch == 'aarch64':
+    return 'arm64'
+  raise Exception('Unsupported host architecture: %s' % host_arch)
+
+def GetHostToolPathFromPlatform(tool):
+  host_arch = platform.machine()
+  return os.path.join(SDK_ROOT, 'tools', GetHostArchFromPlatform(), tool)
+
+
+def GetEmuRootForPlatform(emulator):
+  return os.path.join(
+      DIR_SOURCE_ROOT, 'third_party', '{0}-{1}-{2}'.format(
+          emulator, GetHostOsFromPlatform(), GetHostArchFromPlatform()))
+
+
+def ConnectPortForwardingTask(target, local_port, remote_port = 0):
+  """Establishes a port forwarding SSH task to a localhost TCP endpoint hosted
+  at port |local_port|. Blocks until port forwarding is established.
+
+  Returns the remote port number."""
+
+  forwarding_flags = ['-O', 'forward',  # Send SSH mux control signal.
+                      '-R', '%d:localhost:%d' % (remote_port, local_port),
+                      '-v',   # Get forwarded port info from stderr.
+                      '-NT']  # Don't execute command; don't allocate terminal.
+
+  if remote_port != 0:
+    # Forward to a known remote port.
+    task = target.RunCommand([], ssh_args=forwarding_flags)
+    if task.returncode != 0:
+      raise Exception('Could not establish a port forwarding connection.')
+    return
+
+  task = target.RunCommandPiped([],
+                                ssh_args=forwarding_flags,
+                                stdout=subprocess.PIPE,
+                                stderr=open('/dev/null'))
+  output = task.stdout.readlines()
+  task.wait()
+  if task.returncode != 0:
+    raise Exception('Got an error code when requesting port forwarding: %d' %
+                    task.returncode)
+
+  parsed_port = int(output[0].strip())
+  logging.debug('Port forwarding established (local=%d, device=%d)' %
+                (local_port, parsed_port))
+  return parsed_port
+
+
+def GetAvailableTcpPort():
+  """Finds a (probably) open port by opening and closing a listen socket."""
+  sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+  sock.bind(("", 0))
+  port = sock.getsockname()[1]
+  sock.close()
+  return port
+
+
+def SubprocessCallWithTimeout(command, silent=False, timeout_secs=None):
+  """Helper function for running a command.
+
+  Args:
+    command: The command to run.
+    silent: If true, stdout and stderr of the command will not be printed.
+    timeout_secs: Maximum amount of time allowed for the command to finish.
+
+  Returns:
+    A tuple of (return code, stdout, stderr) of the command. Raises
+    an exception if the subprocess times out.
+  """
+
+  if silent:
+    devnull = open(os.devnull, 'w')
+    process = subprocess.Popen(command, stdout=devnull, stderr=devnull)
+  else:
+    process = subprocess.Popen(command,
+                               stdout=subprocess.PIPE,
+                               stderr=subprocess.PIPE)
+  timeout_timer = None
+  if timeout_secs:
+
+    def interrupt_process():
+      process.send_signal(signal.SIGKILL)
+
+    timeout_timer = threading.Timer(timeout_secs, interrupt_process)
+
+    # Ensure that keyboard interrupts are handled properly (crbug/1198113).
+    timeout_timer.daemon = True
+
+    timeout_timer.start()
+
+  out, err = process.communicate()
+  if timeout_timer:
+    timeout_timer.cancel()
+
+  if process.returncode == -9:
+    raise Exception('Timeout when executing \"%s\".' % ' '.join(command))
+
+  return process.returncode, out, err