Add module type apex to build APEX bundles

A new module type 'apex' is added to be able to build APEX bundles in
Soong.

Usage:

apex {
    name: "com.android.awesome",
    manifest: "manifest.json",
    file_contexts: "file_contexts",
    native_shared_lib_modules: ["libX", "libY"],
}

This will create /system/apex/com.android.awesome.apex having libX.so
and libY.so in it.

Right now, it lacks many of the planned features:

- APEX modules are now built against platform API, which should be against
stable APIs like NDK, Android API and API from other APEXs.

- Only native shared libs are supported. Executables, java libraries,
aidl_interfaces, and prebuilts should be supported.

- Inter-APEX dependency isn't supported yet.

- fs_config isn't configurable. All files and directories are set to
(uid/gid/mode) = (1000/1000/0644)

- native shared libs are stored unstripped.

Bug: 112672359
Test: m apex.test

Change-Id: Ifc44790a8f7de9307550edef0e4d70e9a78327f6

1 files changed, 5 insertions, 0 deletions

diff --git a/apexer/apexer.py b/apexer/apexer.py
index 3032535..d80e807 100644
--- a/apexer/apexer.py
+++ b/apexer/apexer.py
@@ -31,6 +31,8 @@ import subprocess
 import sys
 import tempfile
 
+tool_path = os.environ['APEXER_TOOL_PATH']
+
 def ParseArgs(argv):
   parser = argparse.ArgumentParser(description='Create an APEX file')
   parser.add_argument('-f', '--force', action='store_true',
@@ -55,6 +57,9 @@ def ParseArgs(argv):
 def RunCommand(cmd, verbose=False, env=None):
   env = env or {}
   env.update(os.environ.copy())
+
+  cmd[0] = os.path.join(tool_path, cmd[0])
+
   if verbose:
     print("Running: " + " ".join(cmd))
   p = subprocess.Popen(