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Add support for different Android versions.
We provide the following arguments to configure the Android version:
- `ANDROID_NDK`
- `ANDROID_SDK` (note that this is dependent on `ANDROID_VERSION)
- `ANDROID_VERSION`
- `ANDROID_SYSTEM_COMPLETE`: do a complete Android build
- `ANDROID_SYSTEM_NONE`: do not build the Android system, disables runner support
We now support NDK versions r10e-r25b, SDK versions 21-33, and Android versions 5.0, 5.1, 6.0, 7.0, 8.0, 8.1, 9.0, and 10.0. We also validate that the NDK, SDK, and Android versions are compatible.
Next, we've improved the removal of unittests during the build process, to ensure fast builds while maintaining compatibility with various newer Android versions. To do this, we've implemented a Python library and a script. The Python library contains a complete parser (correctly parses all valid input) for Soong blueprint files, using an LALR grammar, and a rudimentary parser for Makefiles.
The Soong parser removes any `gtest` dependencies, as well as any subdirectories or scope names containing `test`. For example:
```
cc_library {
name: "lib",
srcs: ["lib.cc",],
}
cc_test {
name: "test",
defaults: ["target"],
srcs: ["test.cc"],
}
```
Will become:
```
cc_library {
name: "lib",
srcs: ["lib.cc",],
}
```
The Makefile parser first splits the file based on conditional directives (`ifeq`, `endif`, etc.) to ensure any subsequent processing doesn't lead to unbalanced directives. Next, we split the text within each directive based on comment sections used in the Android source tree. For example:
```
test_tags := tests
include $(call subdir,$(LOCAL_PATH))
c_flags := \
-g \
-Wall
```
We can therefore remove the `Benchmarks` and `Unit tests` sections without removing the `Other section`.
The Python library is reasonably performant (it adds no noticeable overhead to the build process) and is compact (in total, < 60KB). Also, it is much more resilient than a series of `sed` scripts.
Finally, extensive unittests have been added for the Python library, for both code linting (`flake8`) and unittests (via `tox`). Since we cannot assume the presence of Python on the host machine, the tests can be optionally enabled via the `--python` flag (or `PYTHON` environment variable, to hook into the git hooks), and custom overrides for the `flake8` and `tox` commands are provided (since the user may wish to specify a specific Python version, such as `python3.7 -m flake8`).- Loading branch information
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,4 @@ | ||
| { | ||
| "description": "support different Android NDK, API, and Android versions using Docker build args.", | ||
| "type": "added" | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,11 @@ | ||
| # don't copy any of the python artifacts to the docker context | ||
| __pycache__/ | ||
| .pytest_cache/ | ||
| *.py[cod] | ||
| *$py.class | ||
| **/*.egg-info/ | ||
| *.egg | ||
| .tox | ||
|
|
||
| # also skip our test suite | ||
| android/tests/ |
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