Add a platform agnostic release for java_tools.

[iirina]

Create a way to release a java_tools version (in addition to the linux, darwin and winodws versions) without including pre-built ijar and singlejar.

[varming]

I ran into this issue today. Is there a workaround? Even with the parameters --java_toolchain=@bazel_tools//tools/jdk:toolchain_hostjdk8 --host_java_toolchain=@bazel_tools//tools/jdk:toolchain_hostjdk8 bazel still downloads remote_java_tool_linux with the broken ijar

[fosslinux]

Despite the commit closing this issue, I am still having issues with ijar on a non-standard system (musl). How can I force bazel to rebuild ijar now that this should be supported?

[comius]

Add

load("@bazel_tools//tools/jdk:default_java_toolchain.bzl", "default_java_toolchain", "NONPREBUILT_TOOLCHAIN_CONFIGURATION")
default_java_toolchain(
   name = 'custom',
   configuration = NONPREBUILT_TOOLCHAIN_CONFIGURATION,
)

to a BUILD file and use --extra_toolchains=//:custom_definition --incompatible_use_toolchain_resolution_for_java_rules with bazel@head.

Be careful to add _definition suffix when specifying the flag.

@fosslinux I'd be glad if you confirm this is working. We don't have any non-standard systems in our test stand.

[fosslinux]

I appended that block to the root BUILD file in a checkout of this bazel repository and added that flag to the end of my bazel build command. However, it fails with:

ERROR: Traceback (most recent call last):
        File "/builddir/bazel-3.7.2/BUILD", line 241, column 87, in <toplevel>
                load("@bazel_tools//tools/jdk:default_java_toolchain.bzl", "default_java_toolchain", "NONPREBUILT_TOOLCHAIN_CONFIGURATION")
Error: file '@bazel_tools//tools/jdk:default_java_toolchain.bzl' does not contain symbol 'NONPREBUILT_TOOLCHAIN_CONFIGURATION'

Grepping through the checkout yields no results for NONPREBUILT_TOOLCHAIN_CONFIGURATION. Why is this so?

[fosslinux]

Oops, I wasn't on master. Now, this symbol is most def in tools/jdk/default_java_toolchain.bzl, but the build system still gives the same error....

[comius]

For building Bazel itself it's a bit different. The NONPREBUILT_TOOLCHAIN_CONFIG is not found, because it is not part of released Bazel you're using (and this change hasn't been released yet). You can wait for it to be released or you could try bootstraping Bazel, instructions are here https://docs.bazel.build/versions/master/install-compile-source.html#bootstrap-bazel. The bootstrapping already builds everything from scratch so no modifications should be necessary.

After bootstrapping you can use the recipe for either building Bazel or something else.

[wglacier]

Add

load("@bazel_tools//tools/jdk:default_java_toolchain.bzl", "default_java_toolchain", "NONPREBUILT_TOOLCHAIN_CONFIGURATION")
default_java_toolchain(
   name = 'custom',
   configuration = NONPREBUILT_TOOLCHAIN_CONFIGURATION,
)

to a BUILD file and use --extra_toolchains=//:custom_definition --incompatible_use_toolchain_resolution_for_java_rules with bazel@head.

Be careful to add _definition suffix when specifying the flag.

@fosslinux I'd be glad if you confirm this is working. We don't have any non-standard systems in our test stand.

Hi Comius, this change worked for us on rhel6, thanks so much for the help!