Add infrastructure to download golang and build AppRTC collider.

build_apprtc_collider.py

+#!/usr/bin/python
+# Copyright 2014 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.
+
+"""Builds the AppRTC collider using the golang toolchain.
+
+The golang toolchain is downloaded by download_golang.py. We use that here
+to build the AppRTC collider server.
+"""
+
+import os
+import shutil
+import subprocess
+import sys
+
+import utils
+
+
+def main():
+  web_samples_dir = os.path.join('webrtc-samples', 'samples/web')

[kjellander_chromium, 2014/12/08 13:58:07]

'samples/web' -> 'samples', 'web'

[phoglund_chromium, 2014/12/08 14:26:15]

Done.

+  golang_workspace = os.path.join('src', 'out', 'go-workspace')
+  shutil.rmtree(golang_workspace, ignore_errors=True)
+  golang_workspace_src = os.path.join(golang_workspace, 'src')
+
+  collider_dir = os.path.join(web_samples_dir, 'content', 'apprtc', 'collider')
+  shutil.copytree(collider_dir, golang_workspace_src,
+                  ignore=shutil.ignore_patterns('.svn'))

[kjellander_chromium, 2014/12/08 13:58:07]

what if they move to .git?

[phoglund_chromium, 2014/12/08 14:26:15]

I'll make it ignore .git too then.

+
+  golang_binary = 'go%s' % ('.exe' if utils.GetPlatform() == 'win' else '')
+  golang_path = os.path.join('go', 'bin', golang_binary)
+
+  golang_env = os.environ.copy()
+  golang_env['GOROOT'] = os.path.abspath('go')
+  golang_env['GOPATH'] = os.path.abspath(golang_workspace)
+  golang_env['PATH'] += os.pathsep + os.path.abspath('mercurial')
+  subprocess.check_call([golang_path, 'get', 'collidermain'],
+                        env=golang_env)
+  subprocess.check_call([golang_path, 'install', 'collidermain'],

[kjellander_chromium, 2014/12/08 13:58:07]

Is it "installed" somewhere outside the workspace?

[phoglund_chromium, 2014/12/08 14:26:15]

Good question, it might be. I should actually invoke build here, that'll only
build the binary I need.

+                        env=golang_env)
+
+if __name__ == '__main__':
+  sys.exit(main())