java_tools should have prebuilt Linux AArch64 binaries

[timothyg-stripe]

Currently, only four platforms have prebuilt java_tools binaries (singlejar, ijar, etc.): linux, windows, darwin_x86_64, darwin_arm64.

rules_java/java/repositories.bzl

Lines 27 to 51 in 3c34c81

	"java_tools_linux": {
	"mirror_url": "https://mirror.bazel.build/bazel_java_tools/releases/java/v13.4/java_tools_linux-v13.4.zip",
	"github_url": "https://github.com/bazelbuild/java_tools/releases/download/java_v13.4/java_tools_linux-v13.4.zip",
	"sha": "ba10f09a138cf185d04cbc807d67a3da42ab13d618c5d1ce20d776e199c33a39",
	},
	"java_tools_windows": {
	"mirror_url": "https://mirror.bazel.build/bazel_java_tools/releases/java/v13.4/java_tools_windows-v13.4.zip",
	"github_url": "https://github.com/bazelbuild/java_tools/releases/download/java_v13.4/java_tools_windows-v13.4.zip",
	"sha": "fe2f88169696d6c6fc6e90ba61bb46be7d0ae3693cbafdf336041bf56679e8d1",
	},
	"java_tools_darwin_x86_64": {
	"mirror_url": "https://mirror.bazel.build/bazel_java_tools/releases/java/v13.4/java_tools_darwin_x86_64-v13.4.zip",
	"github_url": "https://github.com/bazelbuild/java_tools/releases/download/java_v13.4/java_tools_darwin_x86_64-v13.4.zip",
	"sha": "4523aec4d09c587091a2dae6f5c9bc6922c220f3b6030e5aba9c8f015913cc65",
	},
	"java_tools_darwin_arm64": {
	"mirror_url": "https://mirror.bazel.build/bazel_java_tools/releases/java/v13.4/java_tools_darwin_arm64-v13.4.zip",
	"github_url": "https://github.com/bazelbuild/java_tools/releases/download/java_v13.4/java_tools_darwin_arm64-v13.4.zip",
	"sha": "076a7e198ad077f8c7d997986ef5102427fae6bbfce7a7852d2e080ed8767528",
	},
	"java_tools": {
	"mirror_url": "https://mirror.bazel.build/bazel_java_tools/releases/java/v13.4/java_tools-v13.4.zip",
	"github_url": "https://github.com/bazelbuild/java_tools/releases/download/java_v13.4/java_tools-v13.4.zip",
	"sha": "e025fd260ac39b47c111f5212d64ec0d00d85dec16e49368aae82fc626a940cf",
	},

However, other parts of rules_java supports more platforms, like remotejdk21 which additionally supports Linux AArch64. It would be great if rules_java can distribute prebuilt Linux AArch64 binaries for java_tools, bringing it inline with JDK.

[guw]

Is this a matter of enabling the build process to produce the binaries and release them or is the development work necessary to implement missing native support?

[timothyg-stripe]

I'm guessing it's just a matter of enabling the build process. I haven't tried running it on AArch64, but I'd be surprised if there's any incompatibility.

[fmeum]

Since GraalVM can't cross-compile native images, at least for full parity this would require having real Linux AArch64 machines in Bazel CI.

cc @meteorcloudy

[guw]

As a workaround for now use

rules_java/toolchains/default_java_toolchain.bzl

Line 124 in 02df693

PREBUILT_TOOLCHAIN_CONFIGURATION = dict(

with care

[meteorcloudy]

We do have two Linux Arm64 machines on Bazel CI, one in the normal Bazel unstrusted org, another in the trusted org for release builds. You can use them by ubuntu2004_arm64 platform name.