Add CIPD GAE SDK recipe module and packager.

scripts/slave/recipe_modules/zip/resources/unzip.py

Index: scripts/slave/recipe_modules/zip/resources/unzip.py
diff --git a/scripts/slave/recipe_modules/zip/resources/unzip.py b/scripts/slave/recipe_modules/zip/resources/unzip.py
index 0d1ae391f205cb6e8b1355df4c59e128f26d968a..da37e63e9f56287a2b8652f1f7db9379757b6627 100644
--- a/scripts/slave/recipe_modules/zip/resources/unzip.py
+++ b/scripts/slave/recipe_modules/zip/resources/unzip.py
@@ -14,7 +14,7 @@ import sys
 import zipfile
 
 
-def unzip_with_subprocess(zip_file, output):
+def unzip_with_subprocess(zip_file, output, quiet):
   """Unzips an archive using 'zip' utility.
 
   Works only on Linux and Mac, uses system 'zip' program.
@@ -22,12 +22,19 @@ def unzip_with_subprocess(zip_file, output):
   Args:
     zip_file: absolute path to an archive to unzip.
     output: existing directory to unzip to.
+    quiet (bool): If True, instruct the subprocess to unzip with
+        minimal output.
 
   Returns:
     Exit code (0 on success).
   """
+  args = ['unzip']
+  if quiet:
+    args += ['-q']
+  args += [zip_file]
+
   return subprocess.call(
-      args=['unzip', zip_file],
+      args=args,
       cwd=output)
 
 
@@ -55,6 +62,7 @@ def main():
   data = json.load(sys.stdin)
   output = data['output']
   zip_file = data['zip_file']
+  quiet = data['quiet']
 
   # Archive path should exist and be an absolute path to a file.
   assert os.path.exists(zip_file), zip_file
@@ -73,7 +81,7 @@ def main():
       exit_code = unzip_with_python(zip_file, output)
     else:
       # On mac and linux 'unzip' utility handles symlink and file modes.
-      exit_code = unzip_with_subprocess(zip_file, output)
+      exit_code = unzip_with_subprocess(zip_file, output, quiet)
   finally:
     # On non-zero exit code or on unexpected exception, clean up.
     if exit_code: