Adds GN rule & script for generating AndroidManifest.xml for APK splits

build/config/android/internal_rules.gni

Index: build/config/android/internal_rules.gni
diff --git a/build/config/android/internal_rules.gni b/build/config/android/internal_rules.gni
index 2a7a8921ed37fbd994a208877a58ec7ab52a0bca..b30e4e85dc5d01634e1fe574994846f65bdd9ea4 100644
--- a/build/config/android/internal_rules.gni
+++ b/build/config/android/internal_rules.gni
@@ -1177,3 +1177,54 @@ template("deps_dex") {
     }
   }
 }
+
+# Creates an AndroidManifest.xml for an APK split.
+template("generate_split_manifest") {
+  assert(defined(invoker.main_manifest))
+  assert(defined(invoker.out_manifest))
+  assert(defined(invoker.split_name))
+
+  depfile = "$target_gen_dir/$target_name.d"
+  _args = [
+    "--main-manifest",
+    rebase_path(invoker.main_manifest, root_build_dir),
+    "--out-manifest",
+    rebase_path(invoker.out_manifest, root_build_dir),
+    "--split",
+    invoker.split_name,
+  ]
+  if (defined(invoker.version_code)) {
+    _args += [
+      "--version-code",
+      invoker.version_code,
+    ]
+  }
+  if (defined(invoker.version_name)) {
+    _args += [
+      "--version-name",
+      invoker.version_name,
+    ]
+  }
+  if (defined(invoker.has_code)) {
+    _args += [
+      "--has-code",
+      invoker.has_code,
+    ]
+  }
+  _args += [
+    "--depfile",
+    rebase_path(depfile, root_build_dir),
+  ]
+
+  action(target_name) {

[cjhopman, 2015/05/14 00:24:41]

nit: for templates that consist of a single action, I think it's best for
everything to be done within that action (that is, move this line to the
beginning of the template).

[agrieve, 2015/05/14 13:51:45]

Done.

+    script = "//build/android/gyp/generate_split_manifest.py"
+    outputs = [
+      depfile,
+      invoker.out_manifest,
+    ]
+    inputs = [
+      invoker.main_manifest,
+    ]
+    args = _args
+  }
+}