[Bug]: ERROR: key "windows_amd64" not found in dictionary in aspect_bazel_lib_register_toolchains

[sloretz]

What happened?

I ran bazel sync on Linux in a workspace which depends on aspect-build/bazel-lib. It failed with an error about a dictionary not containing a key for a different platform.

Version

Development (host) and target OS/architectures:

Output of bazel --version:

$ bazel --version
bazel 6.2.0

Version of the Aspect rules, or other relevant rules from your
WORKSPACE or MODULE.bazel file:

2.0.2

Language(s) and/or frameworks involved:

None

How to reproduce

1. Create a folder called `mre_bazel_sync`
2. Create an empty `BUILD` file
3. Create a `WORKSPACE` file with the following content.


workspace(name = "mre_bazel_sync")

load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")

http_archive(
    name = "aspect_bazel_lib",
    sha256 = "4c1de11ebabc23a3c976b73a2b2647596f545beda8a61d2c1c034e07f3f8b976",
    strip_prefix = "bazel-lib-2.0.2",
    url = "https://github.com/aspect-build/bazel-lib/releases/download/v2.0.2/bazel-lib-v2.0.2.tar.gz",
)

load("@aspect_bazel_lib//lib:repositories.bzl", "aspect_bazel_lib_dependencies", "aspect_bazel_lib_register_toolchains")
aspect_bazel_lib_dependencies()
aspect_bazel_lib_register_toolchains()


4. Run `bazel sync`

Any other information?

INFO: Repository bsd_tar_windows_amd64 instantiated at:
  /home/sloretz/projects/sdk/mre-sync-issue/WORKSPACE:14:37: in <toplevel>
  /home/sloretz/.cache/bazel/_bazel_sloretz/b31e869f84d42f493eab6c61a24d6c3e/external/aspect_bazel_lib/lib/repositories.bzl:250:28: in aspect_bazel_lib_register_toolchains
  /home/sloretz/.cache/bazel/_bazel_sloretz/b31e869f84d42f493eab6c61a24d6c3e/external/aspect_bazel_lib/lib/repositories.bzl:94:27: in register_tar_toolchains
Repository rule bsdtar_binary_repo defined at:
  /home/sloretz/.cache/bazel/_bazel_sloretz/b31e869f84d42f493eab6c61a24d6c3e/external/aspect_bazel_lib/lib/private/tar_toolchain.bzl:165:37: in <toplevel>
ERROR: An error occurred during the fetch of repository 'bsd_tar_windows_amd64':
   Traceback (most recent call last):
        File "/home/sloretz/.cache/bazel/_bazel_sloretz/b31e869f84d42f493eab6c61a24d6c3e/external/aspect_bazel_lib/lib/private/tar_toolchain.bzl", line 143, column 30, in _bsdtar_binary_repo
                for lib in LINUX_LIB_DEPS[rctx.attr.platform]:
Error: key "windows_amd64" not found in dictionary
ERROR: /home/sloretz/projects/sdk/mre-sync-issue/WORKSPACE:14:37: fetching bsdtar_binary_repo rule //external:bsd_tar_windows_amd64: Traceback (most recent call last):
        File "/home/sloretz/.cache/bazel/_bazel_sloretz/b31e869f84d42f493eab6c61a24d6c3e/external/aspect_bazel_lib/lib/private/tar_toolchain.bzl", line 143, column 30, in _bsdtar_binary_repo
                for lib in LINUX_LIB_DEPS[rctx.attr.platform]:
Error: key "windows_amd64" not found in dictionary
INFO: Repository bsd_tar_host instantiated at:
  /home/sloretz/projects/sdk/mre-sync-issue/WORKSPACE:14:37: in <toplevel>
  /home/sloretz/.cache/bazel/_bazel_sloretz/b31e869f84d42f493eab6c61a24d6c3e/external/aspect_bazel_lib/lib/repositories.bzl:250:28: in aspect_bazel_lib_register_toolchains
  /home/sloretz/.cache/bazel/_bazel_sloretz/b31e869f84d42f493eab6c61a24d6c3e/external/aspect_bazel_lib/lib/repositories.bzl:94:27: in register_tar_toolchains
Repository rule bsdtar_binary_repo defined at:
  /home/sloretz/.cache/bazel/_bazel_sloretz/b31e869f84d42f493eab6c61a24d6c3e/external/aspect_bazel_lib/lib/private/tar_toolchain.bzl:165:37: in <toplevel>
ERROR: An error occurred during the fetch of repository 'bsd_tar_host':
   Traceback (most recent call last):
        File "/home/sloretz/.cache/bazel/_bazel_sloretz/b31e869f84d42f493eab6c61a24d6c3e/external/aspect_bazel_lib/lib/private/tar_toolchain.bzl", line 125, column 38, in _bsdtar_binary_repo
                tar = _find_usable_system_tar(rctx, tar_name)
        File "/home/sloretz/.cache/bazel/_bazel_sloretz/b31e869f84d42f493eab6c61a24d6c3e/external/aspect_bazel_lib/lib/private/tar_toolchain.bzl", line 110, column 9, in _find_usable_system_tar
                fail("tar isn't a BSD tar")
Error in fail: tar isn't a BSD tar
ERROR: /home/sloretz/projects/sdk/mre-sync-issue/WORKSPACE:14:37: fetching bsdtar_binary_repo rule //external:bsd_tar_host: Traceback (most recent call last):
        File "/home/sloretz/.cache/bazel/_bazel_sloretz/b31e869f84d42f493eab6c61a24d6c3e/external/aspect_bazel_lib/lib/private/tar_toolchain.bzl", line 125, column 38, in _bsdtar_binary_repo
                tar = _find_usable_system_tar(rctx, tar_name)
        File "/home/sloretz/.cache/bazel/_bazel_sloretz/b31e869f84d42f493eab6c61a24d6c3e/external/aspect_bazel_lib/lib/private/tar_toolchain.bzl", line 110, column 9, in _find_usable_system_tar
                fail("tar isn't a BSD tar")
Error in fail: tar isn't a BSD tar
ERROR: key "windows_amd64" not found in dictionary
 checking cached actions

[sloretz]

Workaround: Replace aspect_bazel_lib_register_toolchains() call with registering the toolchains manually, and don't register the tar toolchain

register_copy_directory_toolchains()
register_copy_to_directory_toolchains()
register_expand_template_toolchains()
register_coreutils_toolchains()
register_jq_toolchains()
register_yq_toolchains()