chore: Install toolchains_buildbuddy as bzlmod dependency

.bazelrc.remote

@@ -43,7 +43,11 @@ build:remote-exec --experimental_remote_downloader=grpcs://aherrmann.buildbuddy.
 # docs: https://bazel.build/reference/command-line-reference#flag--jobs
 build:remote-exec --jobs=80
 
+# use BuildBuddy platform on remote builds
 # docs: https://bazel.build/reference/command-line-reference#flag--extra_execution_platforms
 build:remote-exec --extra_execution_platforms=@buildbuddy_toolchain//:platform
 # docs: https://bazel.build/reference/command-line-reference#flag--extra_toolchains
 build:remote-exec --extra_toolchains=@buildbuddy_toolchain//:cc_toolchain
+# prefer host platform on non-remote builds
+# docs: https://bazel.build/reference/command-line-reference#flag--extra_execution_platforms
+build:local --extra_execution_platforms=@local_config_platform//:host

CONTRIBUTING.md

@@ -1,5 +1,28 @@
 # How to Contribute
 
+## Building
+
+To build with remote execution enabled, add the following to `.bazelrc.user`:
+
+```
+build --config=remote
+build --remote_header=x-buildbuddy-api-key=YOUR_TOKEN
+```
+
+To build locally instead, add the following to `.bazelrc.user`:
+
+```
+build --config=local
+```
+
+Build and test:
+
+```
+$ bazel test //...
+$ bazel test //zig/tests/integration_tests
+$ cd e2e/workspace; bazel test //...
+```
+
 ## Committing
 
 Follow [conventional commits](https://www.conventionalcommits.org/en/v1.0.0/)

MODULE.bazel

@@ -26,8 +26,22 @@ zig_dev.toolchain(zig_version = "0.12.1")
 zig_dev.toolchain(zig_version = "0.12.0")
 zig_dev.toolchain(zig_version = "0.11.0")
 
+bazel_dep(name = "toolchains_buildbuddy", dev_dependency = True)
+archive_override(
+    module_name = "toolchains_buildbuddy",
+    integrity = "sha256-HupO9xeeYDAybxZiXmUFk6W5bAlNnM3c2e8cwkutEpc=",
+    strip_prefix = "buildbuddy-toolchain-eb143d1cf81dcc3ddbf0be5b9950cf8c14aa2de9",
+    urls = "https://github.com/buildbuddy-io/buildbuddy-toolchain/archive/eb143d1cf81dcc3ddbf0be5b9950cf8c14aa2de9.tar.gz",
+)
+
+buildbuddy = use_extension(
+    "@toolchains_buildbuddy//:extensions.bzl",
+    "buildbuddy",
+    dev_dependency = True,
+)
+use_repo(buildbuddy, "buildbuddy_toolchain")
+
 bazel_dep(name = "rules_cc", version = "0.0.13", dev_dependency = True)
-bazel_dep(name = "protobuf", version = "28.3", dev_dependency = True)  # for buildbuddy toolchain
 bazel_dep(name = "stardoc", version = "0.7.1", dev_dependency = True, repo_name = "io_bazel_stardoc")
 bazel_dep(name = "gazelle", version = "0.39.1", dev_dependency = True, repo_name = "bazel_gazelle")
 bazel_dep(name = "bazel_skylib_gazelle_plugin", version = "1.7.1", dev_dependency = True)

WORKSPACE.bzlmod

@@ -1,12 +0,0 @@
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-
-http_archive(
-    name = "io_buildbuddy_buildbuddy_toolchain",
-    sha256 = "1eea4ef7179e6030326f16625e650593a5b96c094d9ccddcd9ef1cc24bad1297",
-    strip_prefix = "buildbuddy-toolchain-eb143d1cf81dcc3ddbf0be5b9950cf8c14aa2de9",
-    urls = ["https://github.com/buildbuddy-io/buildbuddy-toolchain/archive/eb143d1cf81dcc3ddbf0be5b9950cf8c14aa2de9.tar.gz"],
-)
-
-load("@io_buildbuddy_buildbuddy_toolchain//:rules.bzl", "buildbuddy")
-
-buildbuddy(name = "buildbuddy_toolchain")

e2e/workspace/MODULE.bazel

@@ -2,7 +2,6 @@ bazel_dep(name = "rules_zig", version = "0.0.0", dev_dependency = True)
 bazel_dep(name = "aspect_bazel_lib", version = "2.9.4", dev_dependency = True)
 bazel_dep(name = "bazel_skylib", version = "1.7.1", dev_dependency = True)
 bazel_dep(name = "platforms", version = "0.0.10", dev_dependency = True)
-bazel_dep(name = "protobuf", version = "28.3", dev_dependency = True)  # for buildbuddy toolchain
 bazel_dep(name = "rules_cc", version = "0.0.13", dev_dependency = True)
 
 local_path_override(
@@ -21,6 +20,21 @@ zig.toolchain(zig_version = "0.12.0")
 zig.toolchain(zig_version = "0.11.0")
 use_repo(zig, "zig_toolchains")
 
+bazel_dep(name = "toolchains_buildbuddy", dev_dependency = True)
+archive_override(
+    module_name = "toolchains_buildbuddy",
+    integrity = "sha256-HupO9xeeYDAybxZiXmUFk6W5bAlNnM3c2e8cwkutEpc=",
+    strip_prefix = "buildbuddy-toolchain-eb143d1cf81dcc3ddbf0be5b9950cf8c14aa2de9",
+    urls = "https://github.com/buildbuddy-io/buildbuddy-toolchain/archive/eb143d1cf81dcc3ddbf0be5b9950cf8c14aa2de9.tar.gz",
+)
+
+buildbuddy = use_extension(
+    "@toolchains_buildbuddy//:extensions.bzl",
+    "buildbuddy",
+    dev_dependency = True,
+)
+use_repo(buildbuddy, "buildbuddy_toolchain")
+
 bazel_dep(name = "runfiles_library_dependency", dev_dependency = True)
 local_path_override(
     module_name = "runfiles_library_dependency",

e2e/workspace/WORKSPACE.bzlmod

@@ -1,15 +1,2 @@
 # When --enable_bzlmod is set, this file replaces WORKSPACE.bazel.
 # Dependencies then come from MODULE.bazel instead.
-
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-
-http_archive(
-    name = "io_buildbuddy_buildbuddy_toolchain",
-    sha256 = "1eea4ef7179e6030326f16625e650593a5b96c094d9ccddcd9ef1cc24bad1297",
-    strip_prefix = "buildbuddy-toolchain-eb143d1cf81dcc3ddbf0be5b9950cf8c14aa2de9",
-    urls = ["https://github.com/buildbuddy-io/buildbuddy-toolchain/archive/eb143d1cf81dcc3ddbf0be5b9950cf8c14aa2de9.tar.gz"],
-)
-
-load("@io_buildbuddy_buildbuddy_toolchain//:rules.bzl", "buildbuddy")
-
-buildbuddy(name = "buildbuddy_toolchain")

zig/tests/integration_tests/workspace/MODULE.bazel

@@ -19,3 +19,18 @@ zig.toolchain(zig_version = "0.12.1")
 zig.toolchain(zig_version = "0.12.0")
 zig.toolchain(zig_version = "0.11.0")
 use_repo(zig, "zig_toolchains")
+
+bazel_dep(name = "toolchains_buildbuddy", dev_dependency = True)
+archive_override(
+    module_name = "toolchains_buildbuddy",
+    integrity = "sha256-HupO9xeeYDAybxZiXmUFk6W5bAlNnM3c2e8cwkutEpc=",
+    strip_prefix = "buildbuddy-toolchain-eb143d1cf81dcc3ddbf0be5b9950cf8c14aa2de9",
+    urls = "https://github.com/buildbuddy-io/buildbuddy-toolchain/archive/eb143d1cf81dcc3ddbf0be5b9950cf8c14aa2de9.tar.gz",
+)
+
+buildbuddy = use_extension(
+    "@toolchains_buildbuddy//:extensions.bzl",
+    "buildbuddy",
+    dev_dependency = True,
+)
+use_repo(buildbuddy, "buildbuddy_toolchain")

zig/tests/integration_tests/workspace/WORKSPACE.bzlmod

@@ -1,12 +0,0 @@
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-
-http_archive(
-    name = "io_buildbuddy_buildbuddy_toolchain",
-    sha256 = "69f605320bed81fc11f1ab69bd76bd7199eca25c7d554504029c85b0a2ebb9af",
-    strip_prefix = "buildbuddy-toolchain-5bf0572e5a9c1e99fddb8e282e9a4cb6734ecd79",
-    urls = ["https://github.com/buildbuddy-io/buildbuddy-toolchain/archive/5bf0572e5a9c1e99fddb8e282e9a4cb6734ecd79.tar.gz"],
-)
-
-load("@io_buildbuddy_buildbuddy_toolchain//:rules.bzl", "buildbuddy")
-
-buildbuddy(name = "buildbuddy_toolchain")