Update to Bazel 8 and use bzl_mod

.bazeliskrc

@@ -1 +1 @@
-USE_BAZEL_VERSION=6.2.0
+USE_BAZEL_VERSION=8.3.1

.bazelrc

@@ -2,6 +2,6 @@ build:aarch64_sysroot --incompatible_enable_cc_toolchain_resolution
 build:aarch64_sysroot --platforms=@rules_swiftnav//platforms:aarch64_bullseye_graviton2
 
 build:x86_64_sysroot --incompatible_enable_cc_toolchain_resolution
-build:x86_64_sysroot --@rules_swiftnav//cc:enable_sysroot=true
+build:x86_64_sysroot --@rules_swiftnav//cc:use_libcpp=true
 
 try-import %workspace%/.bazelrc.user

.github/workflows/bullseye-aarch64-sysroot.yaml

@@ -5,6 +5,9 @@ on:
     paths:
       - "sysroot/**"
       - .github/workflows/bullseye-aarch64-sysroot.yaml
+      - "MODULE.bazel"
+      - ".bazeliskrc"
+      - ".bazelrc"
   push:
     tags:
       - "bullseye-sysroot-*"

.github/workflows/bullseye-x86_64-sysroot.yaml

@@ -5,6 +5,9 @@ on:
     paths:
       - "sysroot/**"
       - .github/workflows/bullseye-x86_64-sysroot.yaml
+      - "MODULE.bazel"
+      - ".bazeliskrc"
+      - ".bazelrc"
   push:
     tags:
       - "bullseye-sysroot-*"

.gitignore

@@ -6,3 +6,6 @@ llvm-obfuscator-*.txz
 sysroot/out
 /bazel-*
 .bazelrc.user
+
+debian_bullseye_x86_64_sysroot.tar.xz
+debian_bullseye_aarch64_sysroot.tar.xz

MODULE.bazel

@@ -0,0 +1,27 @@
+bazel_dep(name = "bazel_skylib", version = "1.8.2")
+
+bazel_dep(name = "rules_swiftnav", version = "0.10.0")
+git_override(
+    module_name = "rules_swiftnav",
+    remote = "https://github.com/swift-nav/rules_swiftnav.git",
+    commit = "3d7491c82b032802774570beb169633d15643846",
+)
+
+swift_cc_toolchain_ext = use_extension("@rules_swiftnav//cc:extensions.bzl", "swift_cc_toolchain_extension")
+use_repo(
+    swift_cc_toolchain_ext,
+    "aarch64-darwin-llvm",
+    "aarch64-linux-llvm",
+    "x86_64-darwin-llvm",
+    "x86_64-linux-llvm",
+)
+
+register_toolchains(
+    "@rules_swiftnav//cc/toolchains/llvm/aarch64-darwin:cc-toolchain-aarch64-darwin",
+    "@rules_swiftnav//cc/toolchains/llvm/x86_64-darwin:cc-toolchain-x86_64-darwin",
+    "@rules_swiftnav//cc/toolchains/llvm/aarch64-linux:cc-toolchain-aarch64-linux",
+    "@rules_swiftnav//cc/toolchains/llvm/x86_64-linux:cc-toolchain-x86_64-linux",
+    "@rules_swiftnav//cc/toolchains/llvm/x86_64-linux:cc-toolchain-intel-mkl",
+    "@rules_swiftnav//cc/toolchains/llvm/x86_64-aarch64-linux:cc-toolchain-aarch64-bullseye-graviton2",
+    "@rules_swiftnav//cc/toolchains/llvm/x86_64-aarch64-linux:cc-toolchain-aarch64-bullseye-graviton3",
+)