add an asset for the Linux Android NDK.

I have run create_and_upload.py... cipd is uploading now.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2275093003

Review-Url: https://codereview.chromium.org/2275093003

infra/bots/assets/android_ndk_linux/VERSION

@@ -0,0 +1 @@
+4

infra/bots/assets/android_ndk_linux/common.py

@@ -0,0 +1,26 @@
+#!/usr/bin/env python
+#
+# Copyright 2016 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+
+"""Common vars used by scripts in this directory."""
+
+
+import os
+import sys
+
+FILE_DIR = os.path.dirname(os.path.abspath(__file__))
+INFRA_BOTS_DIR = os.path.realpath(os.path.join(FILE_DIR, os.pardir, os.pardir))
+
+sys.path.insert(0, INFRA_BOTS_DIR)
+from assets import assets
+
+ASSET_NAME = os.path.basename(FILE_DIR)
+
+
+def run(cmd):
+  """Run a command, eg. "upload" or "download". """
+  assets.main([cmd, ASSET_NAME] + sys.argv[1:])

infra/bots/assets/android_ndk_linux/create.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python
+#
+# Copyright 2016 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+
+"""Create the asset."""
+
+
+import argparse
+import glob
+import os.path
+import shutil
+import subprocess
+
+NDK_VER = "android-ndk-r12b"
+NDK_URL = \
+    "https://dl.google.com/android/repository/%s-linux-x86_64.zip" % NDK_VER
+
+def create_asset(target_dir):
+  """Create the asset."""
+  subprocess.check_call(["curl", NDK_URL, "-o", "ndk.zip"])
+  subprocess.check_call(["unzip", "ndk.zip", "-d", target_dir])
+  for f in glob.glob(os.path.join(target_dir, NDK_VER, "*")):
+    shutil.move(f, target_dir)
+  subprocess.check_call(["rm", "ndk.zip"])
+
+
+def main():
+  parser = argparse.ArgumentParser()
+  parser.add_argument('--target_dir', '-t', required=True)
+  args = parser.parse_args()
+  create_asset(args.target_dir)
+
+
+if __name__ == '__main__':
+  main()

infra/bots/assets/android_ndk_linux/create_and_upload.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python
+#
+# Copyright 2016 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+
+"""Create the asset and upload it."""
+
+
+import argparse
+import common
+import os
+import subprocess
+import sys
+import utils
+
+
+def main():
+  parser = argparse.ArgumentParser()
+  parser.add_argument('--gsutil')
+  args = parser.parse_args()
+
+  with utils.tmp_dir():
+    cwd = os.getcwd()
+    create_script = os.path.join(common.FILE_DIR, 'create.py')
+    upload_script = os.path.join(common.FILE_DIR, 'upload.py')
+
+    try:
+      subprocess.check_call(['python', create_script, '-t', cwd])
+      cmd = ['python', upload_script, '-t', cwd]
+      if args.gsutil:
+        cmd.extend(['--gsutil', args.gsutil])
+      subprocess.check_call(cmd)
+    except subprocess.CalledProcessError:
+      # Trap exceptions to avoid printing two stacktraces.
+      sys.exit(1)
+
+
+if __name__ == '__main__':
+  main()

infra/bots/assets/android_ndk_linux/download.py

@@ -0,0 +1,16 @@
+#!/usr/bin/env python
+#
+# Copyright 2016 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+
+"""Download the current version of the asset."""
+
+
+import common
+
+
+if __name__ == '__main__':
+  common.run('download')

infra/bots/assets/android_ndk_linux/upload.py

@@ -0,0 +1,16 @@
+#!/usr/bin/env python
+#
+# Copyright 2016 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+
+"""Upload a new version of the asset."""
+
+
+import common
+
+
+if __name__ == '__main__':
+  common.run('upload')

infra/bots/zip_utils.py

@@ -27,7 +27,7 @@ def zip(target_dir, zip_file, blacklist=None):  # pylint: disable=W0622
   if not os.path.isdir(target_dir):
     raise IOError('%s does not exist!' % target_dir)
   blacklist = blacklist or []
-  with zipfile.ZipFile(zip_file, 'w') as z:
+  with zipfile.ZipFile(zip_file, 'w', zipfile.ZIP_DEFLATED, True) as z:
     for r, d, f in os.walk(target_dir, topdown=True):
       d[:] = filtered(d, blacklist)
       for filename in filtered(f, blacklist):
@@ -36,7 +36,7 @@ def zip(target_dir, zip_file, blacklist=None):  # pylint: disable=W0622
         zi.filename = os.path.relpath(filepath, target_dir)
         perms = os.stat(filepath).st_mode
         zi.external_attr = perms << 16L
-        zi.compress_type = zipfile.ZIP_STORED
+        zi.compress_type = zipfile.ZIP_DEFLATED
         with open(filepath, 'rb') as f:
           content = f.read()
         z.writestr(zi, content)
@@ -49,7 +49,7 @@ def unzip(zip_file, target_dir):
   """Unzip the given zip file into the target dir."""
   if not os.path.isdir(target_dir):
     os.makedirs(target_dir)
-  with zipfile.ZipFile(zip_file, 'r') as z:
+  with zipfile.ZipFile(zip_file, 'r', zipfile.ZIP_DEFLATED, True) as z:
     for zi in z.infolist():
       dst_path = os.path.join(target_dir, zi.filename)
       if zi.filename.endswith('/'):