Android: Support package_resources post-processing.

This CL adds support for android_apk targets to post-process a resource
packaged APK.

Bug: 695304
Change-Id: Ic3b58f48fdfdf4e87ebf45546b2ef12369390aaf
Reviewed-on: https://chromium-review.googlesource.com/558427Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Eric Stevenson <estevenson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487554}

build/android/gyp/util/build_utils.py

@@ -271,7 +271,7 @@ def AddToZipHermetic(zip_file, zip_path, src_path=None, data=None,
     zip_path: Destination path within the zip file.
     src_path: Path of the source file. Mutually exclusive with |data|.
     data: File data as a string.
-    compress: Whether to enable compression. Default is take from ZipFile
+    compress: Whether to enable compression. Default is taken from ZipFile
         constructor.
   """
   assert (src_path is None) != (data is None), (
@@ -303,13 +303,15 @@ def AddToZipHermetic(zip_file, zip_path, src_path=None, data=None,
   zip_file.writestr(zipinfo, data, compress_type)
 
 
-def DoZip(inputs, output, base_dir=None):
+def DoZip(inputs, output, base_dir=None, compress_fn=None):
   """Creates a zip file from a list of files.
 
   Args:
     inputs: A list of paths to zip, or a list of (zip_path, fs_path) tuples.
     output: Destination .zip file.
     base_dir: Prefix to strip from inputs.
+    compress_fn: Applied to each input to determine whether or not to compress.
+        By default, items will be |zipfile.ZIP_STORED|.
   """
   input_tuples = []
   for tup in inputs:
@@ -321,16 +323,17 @@ def DoZip(inputs, output, base_dir=None):
   input_tuples.sort(key=lambda tup: tup[0])
   with zipfile.ZipFile(output, 'w') as outfile:
     for zip_path, fs_path in input_tuples:
-      AddToZipHermetic(outfile, zip_path, src_path=fs_path)
+      compress = compress_fn(zip_path) if compress_fn else None
+      AddToZipHermetic(outfile, zip_path, src_path=fs_path, compress=compress)
 
 
-def ZipDir(output, base_dir):
+def ZipDir(output, base_dir, compress_fn=None):
   """Creates a zip file from a directory."""
   inputs = []
   for root, _, files in os.walk(base_dir):
     for f in files:
       inputs.append(os.path.join(root, f))
-  DoZip(inputs, output, base_dir)
+  DoZip(inputs, output, base_dir, compress_fn=compress_fn)
 
 
 def MatchesGlob(path, filters):

build/config/android/internal_rules.gni

@@ -1631,7 +1631,18 @@ if (enable_java_templates) {
     }
 
     template("package_resources_helper") {
-      action(target_name) {
+      _resource_packaged_apk_path = invoker.resource_packaged_apk_path
+      _package_resources_target = target_name
+      _post_process = defined(invoker.post_process_package_resources_script) &&
+                      defined(invoker.post_process_package_resources_args)
+      if (_post_process) {
+        _package_resources_target = "${_package_resources_target}__intermediate"
+        _post_processed_resource_packaged_apk_path = _resource_packaged_apk_path
+        _resource_packaged_apk_path =
+            "${_resource_packaged_apk_path}__intermediate.ap_"
+      }
+
+      action(_package_resources_target) {
         deps = invoker.deps
 
         script = "//build/android/gyp/package_resources.py"
@@ -1643,7 +1654,7 @@ if (enable_java_templates) {
           inputs += [ _resources_zip ]
         }
         outputs = [
-          invoker.resource_packaged_apk_path,
+          _resource_packaged_apk_path,
         ]
 
         if (defined(invoker.android_aapt_path)) {
@@ -1674,7 +1685,7 @@ if (enable_java_templates) {
           "--version-name",
           _version_name,
           "--apk-path",
-          rebase_path(invoker.resource_packaged_apk_path, root_build_dir),
+          rebase_path(_resource_packaged_apk_path, root_build_dir),
         ]
 
         if (defined(_resources_zip)) {
@@ -1727,6 +1738,32 @@ if (enable_java_templates) {
           }
         }
       }
+
+      if (_post_process) {
+        action(target_name) {
+          depfile = "${target_gen_dir}/${target_name}.d"
+          script = invoker.post_process_package_resources_script
+          args = [
+            "--depfile",
+            rebase_path(depfile, root_build_dir),
+            "--apk-path",
+            rebase_path(_resource_packaged_apk_path, root_build_dir),
+            "--output",
+            rebase_path(_post_processed_resource_packaged_apk_path,
+                        root_build_dir),
+          ]
+          args += invoker.post_process_package_resources_args
+          inputs = [
+            _resource_packaged_apk_path,
+          ]
+          outputs = [
+            _post_processed_resource_packaged_apk_path,
+          ]
+          deps = [
+            ":${_package_resources_target}",
+          ]
+        }
+      }
     }
 
     _package_resources_target_name = "${target_name}__package_resources"
@@ -1739,6 +1776,8 @@ if (enable_java_templates) {
                                "png_to_webp",
                                "exclude_xxxhdpi",
                                "extensions_to_not_compress",
+                               "post_process_package_resources_args",
+                               "post_process_package_resources_script",
                                "xxxhdpi_whitelist",
                              ])
       deps = _deps
@@ -1791,6 +1830,8 @@ if (enable_java_templates) {
                                "png_to_webp",
                                "exclude_xxxhdpi",
                                "extensions_to_not_compress",
+                               "post_process_package_resources_args",
+                               "post_process_package_resources_script",
                                "xxxhdpi_whitelist",
                              ])
       deps =

build/config/android/rules.gni

@@ -2269,6 +2269,8 @@ if (enable_java_templates) {
                                "exclude_xxxhdpi",
                                "extensions_to_not_compress",
                                "language_splits",
+                               "post_process_package_resources_args",
+                               "post_process_package_resources_script",
                                "public_deps",
                                "secondary_native_libs",
                                "shared_resources",