Issue 5129 - [build] Signing fails if zipalign is not in PATH

build.py

 #!/usr/bin/env python
 
 import glob
 import json
 import os
 import re
 import shutil
 import string
 import subprocess
 import sys
@@ skipping 84 matching lines @@
             manifest["moz_app_version"], manifest["buildid"], architecture)
     target_apk_path = os.path.join(dist_path, target_apk_name)
     shutil.copyfile(apk_path, target_apk_path)
 
     target_manifest_path = re.sub(r".apk$", ".json", target_apk_path)
     shutil.copyfile(manifest_path, target_manifest_path)
 
     return target_apk_path
 
 
-def _sign(apk_path, key_store, key_name):
+def _sign(apk_path, key_store, key_name, sdk_path):
+    sys.path.append(os.path.join(_ABB_PATH, "python", "mozboot", "mozboot"))
+    from android import ANDROID_BUILD_TOOLS_VERSION
+    zipalign_path = os.path.join(sdk_path, "build-tools",
+                                 ANDROID_BUILD_TOOLS_VERSION, "zipalign")
     temp_apk_path = tempfile.NamedTemporaryFile().name
     shutil.copyfile(apk_path, temp_apk_path)
     try:
         subprocess.check_call(["jarsigner", "-verbose",
                                "-sigalg", "SHA1withRSA",
                                "-digestalg", "SHA1",
                                "-keystore", key_store,
                                temp_apk_path, key_name])
         os.remove(apk_path)
-        subprocess.check_call(["zipalign", "-v", "4", temp_apk_path, apk_path])
+        subprocess.check_call([zipalign_path, "-v", "4", temp_apk_path,
+                               apk_path])
     finally:
         os.remove(temp_apk_path)
 
 if __name__ == "__main__":
     if len(sys.argv) < 2:
         print_usage()
         sys.exit(1)
 
     mode = sys.argv[1]
     do_build = mode in (_CMD_BUILD, _CMD_BUILD_SIGN)
@@ skipping 27 matching lines @@
     architecture = config.ARCHITECTURE
     if architecture not in _ARCHS:
         print >>sys.stderr, error_msg % (
                                          "architecture", "architectures", _ARCHS)
         sys.exit(6)
 
     if do_build:
         apk_path = _build(architecture, distribution_mode, build_mode,
                           config.ANDROID_SDK_PATH, config.ANDROID_NDK_PATH)
     if do_sign:
-        _sign(apk_path, config.ANDROID_KEYSTORE_PATH, config.ANDROID_KEY_NAME)
+        _sign(apk_path, config.ANDROID_KEYSTORE_PATH, config.ANDROID_KEY_NAME,
+              config.ANDROID_SDK_PATH)
     else:
         print apk_path