Can't install on rocky linux 8.6

[JonKohler]

As the title suggests, I was unable to easily get this setup on Rocky 8.6. I did the clone, and yarn install and that worked, but trying to get the server up fails almost immediately with the following:

INFO: Call stack for the definition of repository 'llvm_toolchain' which is a llvm_toolchain (rule definition at /root/.cache/bazel/_bazel_root/116cb4b37cb5ae33998452196fe24c90/external/com_grail_bazel_toolchain/toolchain/rules.bzl:24:18):
 - /root/git/schedviz/WORKSPACE:66:1
ERROR: An error occurred during the fetch of repository 'llvm_toolchain':
   Traceback (most recent call last):
        File "/root/.cache/bazel/_bazel_root/116cb4b37cb5ae33998452196fe24c90/external/com_grail_bazel_toolchain/toolchain/internal/configure.bzl", line 101
                _download_llvm_preconfigured(rctx)
        File "/root/.cache/bazel/_bazel_root/116cb4b37cb5ae33998452196fe24c90/external/com_grail_bazel_toolchain/toolchain/internal/llvm_distributions.bzl", line 120, in _download_llvm_preconfigured
                fail(("Failed to detect host OS versi...)))
Failed to detect host OS version: 

Unsupported linux distribution and version: rocky, 8.6
ERROR: no such package '@llvm_toolchain//': Traceback (most recent call last):
        File "/root/.cache/bazel/_bazel_root/116cb4b37cb5ae33998452196fe24c90/external/com_grail_bazel_toolchain/toolchain/internal/configure.bzl", line 101
                _download_llvm_preconfigured(rctx)
        File "/root/.cache/bazel/_bazel_root/116cb4b37cb5ae33998452196fe24c90/external/com_grail_bazel_toolchain/toolchain/internal/llvm_distributions.bzl", line 120, in _download_llvm_preconfigured
                fail(("Failed to detect host OS versi...)))
Failed to detect host OS version: 

Unsupported linux distribution and version: rocky, 8.6
ERROR: no such package '@llvm_toolchain//': Traceback (most recent call last):
        File "/root/.cache/bazel/_bazel_root/116cb4b37cb5ae33998452196fe24c90/external/com_grail_bazel_toolchain/toolchain/internal/configure.bzl", line 101
                _download_llvm_preconfigured(rctx)
        File "/root/.cache/bazel/_bazel_root/116cb4b37cb5ae33998452196fe24c90/external/com_grail_bazel_toolchain/toolchain/internal/llvm_distributions.bzl", line 120, in _download_llvm_preconfigured
                fail(("Failed to detect host OS versi...)))
Failed to detect host OS version: 

Unsupported linux distribution and version: rocky, 8.6

[sabarabc]

Try setting the distribution flag to "clang+llvm-9.0.0-x86_64-pc-linux-gnu.tar.xz" here:

schedviz/WORKSPACE

Lines 66 to 69 in 5fb1be3

	llvm_toolchain(
	name = "llvm_toolchain",
	llvm_version = "9.0.0",
	)

The problem is that the llvm_toolchain dependency can't detect your distro, so you have to manually specify the version to download.

[JonKohler]

Yep that helped, configured it like this and it went ahead.

Looking forward though, is there any dependency chain or something we need to "bump" to have that work automagically? Or perhaps document the supported OS versions, etc?

llvm_toolchain(
    name = "llvm_toolchain",
    llvm_version = "9.0.0",
    distribution = "clang+llvm-9.0.0-x86_64-pc-linux-gnu.tar.xz",
)

[JonKohler]

It's also worth saying that "out of the box" this repo wont run because of #38 and #40, so this only fixes one issue