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graal.bzl
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"Rules for building native binaries using the GraalVM `native-image` tool on Bazel 5 and older."
load(
"@bazel_skylib//lib:dicts.bzl",
"dicts",
)
load(
"//internal/native_image:classic.bzl",
_BAZEL_CPP_TOOLCHAIN_TYPE = "BAZEL_CPP_TOOLCHAIN_TYPE",
_BAZEL_CURRENT_CPP_TOOLCHAIN = "BAZEL_CURRENT_CPP_TOOLCHAIN",
_DEBUG = "DEBUG_CONDITION",
_DEFAULT_GVM_REPO = "DEFAULT_GVM_REPO",
_NATIVE_IMAGE_ATTRS = "NATIVE_IMAGE_ATTRS",
_OPTIMIZATION_MODE = "OPTIMIZATION_MODE_CONDITION",
_graal_binary_implementation = "graal_binary_implementation",
)
_DEFAULT_NATIVE_IMAGE_TOOL = Label("%s//:native-image" % _DEFAULT_GVM_REPO)
_native_image = rule(
implementation = _graal_binary_implementation,
attrs = dicts.add(_NATIVE_IMAGE_ATTRS, **{
"native_image_tool": attr.label(
cfg = "exec",
default = _DEFAULT_NATIVE_IMAGE_TOOL,
allow_files = True,
executable = True,
mandatory = False,
),
"_cc_toolchain": attr.label(
default = Label(_BAZEL_CURRENT_CPP_TOOLCHAIN),
),
}),
executable = True,
fragments = [
"cpp",
],
toolchains = [
_BAZEL_CPP_TOOLCHAIN_TYPE,
],
)
## Exports.
def native_image(
name,
deps,
main_class = None,
executable_name = select({
"@bazel_tools//src/conditions:windows": "%target%-bin.exe",
"//conditions:default": "%target%-bin",
}),
include_resources = None,
reflection_configuration = None,
jni_configuration = None,
initialize_at_build_time = [],
initialize_at_run_time = [],
native_features = [],
debug = _DEBUG,
optimization_mode = _OPTIMIZATION_MODE,
shared_library = None,
static_zlib = None,
c_compiler_option = [],
data = [],
extra_args = [],
allow_fallback = False,
check_toolchains = select({
"@bazel_tools//src/conditions:windows": True,
"//conditions:default": False,
}),
native_image_tool = _DEFAULT_NATIVE_IMAGE_TOOL,
**kwargs):
"""Generates and compiles a GraalVM native image from a Java library target.
Args:
name: Name of the target; required.
deps: Dependency `java_library` targets to assemble the classpath from. Mandatory.
main_class: Entrypoint main class to build from; mandatory unless building a shared library.
executable_name: Set the name of the output binary; defaults to `%target%-bin`, or `%target%-bin.exe` on Windows.
The special string `%target%`, if present, is replaced with `name`.
include_resources: Glob to pass to `IncludeResources`. No default; optional.
reflection_configuration: Reflection configuration file. No default; optional.
jni_configuration: JNI configuration file. No default; optional.
initialize_at_build_time: Classes or patterns to pass to `--initialize-at-build-time`. No default; optional.
initialize_at_run_time: Classes or patterns to pass to `--initialize-at-run-time`. No default; optional.
native_features: GraalVM `Feature` classes to include and apply. No default; optional.
debug: Whether to include debug symbols; by default, this flag's state is managed by Bazel. Passing
`--compilation_mode=dbg` is sufficient to flip this to `True`, or it can be overridden via this parameter.
optimization_mode: Behaves the same as `debug`; normally, this flag's state is managed by Bazel. Passing
`--compilation_mode=fastbuild|opt|dbg` is sufficient to set this flag, or it can be overridden via this
parameter.
shared_library: Build a shared library binary instead of an executable.
static_zlib: A cc_library or cc_import target that provides zlib as a static library.
On Linux, this is used when Graal statically links zlib into the binary, e.g. with
`-H:+StaticExecutableWithDynamicLibC`.
c_compiler_option: Extra C compiler options to pass through `native-image`. No default; optional.
data: Data files to make available during the compilation. No default; optional.
extra_args: Extra `native-image` args to pass. Last wins. No default; optional.
allow_fallback: Whether to allow fall-back to a partial native image; defaults to `False`.
check_toolchains: Whether to perform toolchain checks in `native-image`; defaults to `True` on Windows, `False` otherwise.
native_image_tool: Specific `native-image` executable target to use.
**kwargs: Extra keyword arguments are passed to the underlying `native_image` rule.
"""
_native_image(
name = name,
deps = deps,
main_class = main_class,
include_resources = include_resources,
reflection_configuration = reflection_configuration,
jni_configuration = jni_configuration,
initialize_at_build_time = initialize_at_build_time,
initialize_at_run_time = initialize_at_run_time,
native_features = native_features,
debug = debug,
optimization_mode = optimization_mode,
shared_library = shared_library,
data = data,
extra_args = extra_args,
check_toolchains = check_toolchains,
static_zlib = static_zlib,
c_compiler_option = c_compiler_option,
allow_fallback = allow_fallback,
executable_name = executable_name,
native_image_tool = native_image_tool,
**kwargs
)
def graal_binary(
name,
deps,
main_class = None,
executable_name = select({
"@bazel_tools//src/conditions:windows": "%target%-bin.exe",
"//conditions:default": "%target%-bin",
}),
include_resources = None,
reflection_configuration = None,
jni_configuration = None,
initialize_at_build_time = [],
initialize_at_run_time = [],
native_features = [],
debug = _DEBUG,
optimization_mode = _OPTIMIZATION_MODE,
shared_library = None,
static_zlib = None,
c_compiler_option = [],
data = [],
extra_args = [],
allow_fallback = False,
check_toolchains = select({
"@bazel_tools//src/conditions:windows": True,
"//conditions:default": False,
}),
native_image_tool = _DEFAULT_NATIVE_IMAGE_TOOL,
**kwargs):
"""Alias for the renamed `native_image` rule. Identical.
Args:
name: Name of the target; required.
deps: Dependency `java_library` targets to assemble the classpath from. Mandatory.
main_class: Entrypoint main class to build from; mandatory unless building a shared library.
executable_name: Set the name of the output binary; defaults to `%target%-bin`, or `%target%-bin.exe` on Windows.
The special string `%target%`, if present, is replaced with `name`.
include_resources: Glob to pass to `IncludeResources`. No default; optional.
reflection_configuration: Reflection configuration file. No default; optional.
jni_configuration: JNI configuration file. No default; optional.
initialize_at_build_time: Classes or patterns to pass to `--initialize-at-build-time`. No default; optional.
initialize_at_run_time: Classes or patterns to pass to `--initialize-at-run-time`. No default; optional.
native_features: GraalVM `Feature` classes to include and apply. No default; optional.
debug: Whether to include debug symbols; by default, this flag's state is managed by Bazel. Passing
`--compilation_mode=dbg` is sufficient to flip this to `True`, or it can be overridden via this parameter.
optimization_mode: Behaves the same as `debug`; normally, this flag's state is managed by Bazel. Passing
`--compilation_mode=fastbuild|opt|dbg` is sufficient to set this flag, or it can be overridden via this
parameter.
shared_library: Build a shared library binary instead of an executable.
static_zlib: A cc_library or cc_import target that provides zlib as a static library.
On Linux, this is used when Graal statically links zlib into the binary, e.g. with
`-H:+StaticExecutableWithDynamicLibC`.
c_compiler_option: Extra C compiler options to pass through `native-image`. No default; optional.
data: Data files to make available during the compilation. No default; optional.
extra_args: Extra `native-image` args to pass. Last wins. No default; optional.
allow_fallback: Whether to allow fall-back to a partial native image; defaults to `False`.
check_toolchains: Whether to perform toolchain checks in `native-image`; defaults to `True` on Windows, `False` otherwise.
native_image_tool: Specific `native-image` executable target to use.
**kwargs: Extra keyword arguments are passed to the underlying `native_image` rule.
"""
native_image(
name = name,
deps = deps,
main_class = main_class,
include_resources = include_resources,
reflection_configuration = reflection_configuration,
jni_configuration = jni_configuration,
initialize_at_build_time = initialize_at_build_time,
initialize_at_run_time = initialize_at_run_time,
native_features = native_features,
debug = debug,
optimization_mode = optimization_mode,
shared_library = shared_library,
data = data,
extra_args = extra_args,
static_zlib = static_zlib,
check_toolchains = check_toolchains,
c_compiler_option = c_compiler_option,
executable_name = executable_name,
native_image_tool = native_image_tool,
allow_fallback = allow_fallback,
**kwargs
)