Merge branch 'main' into process-wrapper-rust

.bazelci/presubmit.yml

@@ -15,6 +15,11 @@ default_windows_targets: &default_windows_targets
   - "-//test/proto/..."
   - "-//tools/rust_analyzer/..."
   - "-//test/rustfmt/..."
+crate_universe_vendor_example_targets: &crate_universe_vendor_example_targets
+  - "//vendor_local_manifests:crates_vendor"
+  - "//vendor_local_pkgs:crates_vendor"
+  - "//vendor_remote_manifests:crates_vendor_manifests"
+  - "//vendor_remote_pkgs:crates_vendor_pkgs"
 tasks:
   ubuntu2004:
     build_targets: *default_linux_targets
@@ -249,9 +254,8 @@ tasks:
   crate_universe_examples_ubuntu2004:
     name: Crate Universe Examples
     platform: ubuntu2004
-    environment:
-      RULES_RUST_CRATE_UNIVERSE_BOOTSTRAP: true
     working_directory: examples/crate_universe
+    run_targets: *crate_universe_vendor_example_targets
     build_targets:
       - "//..."
     test_targets:
@@ -260,12 +264,11 @@ tasks:
   crate_universe_rbe_ubuntu1604:
     name: Crate Universe Examples
     platform: rbe_ubuntu1604
-    environment:
-      RULES_RUST_CRATE_UNIVERSE_BOOTSTRAP: true
     working_directory: examples/crate_universe
     shell_commands:
       - sed -i 's/^# load("@bazelci_rules/load("@bazelci_rules/' WORKSPACE.bazel
       - sed -i 's/^# rbe_preconfig/rbe_preconfig/' WORKSPACE.bazel
+    run_targets: *crate_universe_vendor_example_targets
     build_targets:
       - "//..."
     test_targets:
@@ -274,9 +277,8 @@ tasks:
   crate_universe_examples_macos:
     name: Crate Universe Examples
     platform: macos
-    environment:
-      RULES_RUST_CRATE_UNIVERSE_BOOTSTRAP: true
     working_directory: examples/crate_universe
+    run_targets: *crate_universe_vendor_example_targets
     build_targets:
       - "//..."
     test_targets:
@@ -285,22 +287,16 @@ tasks:
   crate_universe_examples_windows:
     name: Crate Universe Examples
     platform: windows
-    environment:
-      RULES_RUST_CRATE_UNIVERSE_BOOTSTRAP: true
     working_directory: examples/crate_universe
-    build_flags:
-      - "--enable_runfiles" # this is not enabled by default on windows and is necessary for the cargo build scripts
-      - "--config=rustfmt"
-      - "--config=clippy"
-    crate_universe_windows_targets: &crate_universe_windows_targets
+    batch_commands:
+      - echo startup --windows_enable_symlinks >> user.bazelrc
+      - echo build --enable_runfiles >> user.bazelrc  # this is not enabled by default on windows and is necessary for the cargo build scripts
+    run_targets: *crate_universe_vendor_example_targets
+    build_flags: *aspects_flags
+    build_targets:
+      - "//..."
+    test_targets:
       - "//..."
-      # TODO: There are windows specific build issues in the generated
-      # dependencies. This should be fixed and all testing enabled.
-      - "-//uses_proc_macro/..."
-      - "-//uses_sys_crate/..."
-    build_targets: *crate_universe_windows_targets
-    # TODO: fix test targets in `crate_universe_windows_targets`
-    test_targets: *crate_universe_windows_targets
 buildifier:
   version: latest
   warnings: "all"

.bazelrc

@@ -1,5 +1,5 @@
 # `.bazelrc` is a Bazel configuration file.
-# https://docs.bazel.build/versions/master/best-practices.html#using-the-bazelrc-file
+# https://bazel.build/docs/best-practices#bazelrc-file
 
 # Enable rustfmt for all targets in the workspace
 build:rustfmt --aspects=//rust:defs.bzl%rustfmt_aspect
@@ -9,5 +9,9 @@ build:rustfmt --output_groups=+rustfmt_checks
 build:clippy --aspects=//rust:defs.bzl%rust_clippy_aspect
 build:clippy --output_groups=+clippy_checks
 
-# https://bazel.googlesource.com/bazel/+/master/site/docs/windows.md#enable-symlink-support
-startup --windows_enable_symlinks
+# https://bazel.build/docs/windows#symlink
+startup --windows_enable_symlinks
+
+# This import should always be last to allow users to override
+# settings for local development.
+try-import %workspace%/user.bazelrc

.gitignore

@@ -8,6 +8,7 @@
 /examples/bazel-*
 /examples/crate_universe/*/bazel-*
 /docs/bazel-*
+user.bazelrc
 
 # rustfmt
 *.rs.bk

WORKSPACE.bazel

@@ -6,6 +6,10 @@ rules_rust_dependencies()
 
 rust_register_toolchains(include_rustc_srcs = True)
 
+load("@rules_rust//crate_universe:crates.bzl", "crate_deps_repository")
+
+crate_deps_repository(bootstrap = True)
+
 load("@rules_rust//proto:repositories.bzl", "rust_proto_repositories")
 
 rust_proto_repositories()

cargo/cargo_bootstrap.bzl

@@ -116,6 +116,11 @@ exports_files([
     "{binary}"
 ])
 
+alias(
+    name = "binary",
+    actual = "{binary}",
+)
+
 rust_binary(
     name = "install",
     rustc_env = {{

cargo/cargo_build_script.bzl

@@ -7,7 +7,7 @@ load("//rust:defs.bzl", "rust_binary", "rust_common")
 load("//rust/private:rustc.bzl", "BuildInfo", "get_compilation_mode_opts", "get_linker_and_args")
 
 # buildifier: disable=bzl-visibility
-load("//rust/private:utils.bzl", "expand_dict_value_locations", "find_cc_toolchain", "find_toolchain", "name_to_crate_name")
+load("//rust/private:utils.bzl", "dedent", "expand_dict_value_locations", "find_cc_toolchain", "find_toolchain", "name_to_crate_name")
 
 def get_cc_compile_env(cc_toolchain, feature_configuration):
     """Gather cc environment variables from the given `cc_toolchain`
@@ -56,11 +56,7 @@ def _build_script_impl(ctx):
 
     pkg_name = _name_to_pkg_name(ctx.label.name)
 
-    toolchain_tools = [
-        # Needed for rustc to function.
-        toolchain.rustc_lib,
-        toolchain.rust_std,
-    ]
+    toolchain_tools = [toolchain.all_files]
 
     cc_toolchain = find_cpp_toolchain(ctx)
 
@@ -121,6 +117,13 @@ def _build_script_impl(ctx):
         if cc_toolchain.sysroot:
             env["SYSROOT"] = cc_toolchain.sysroot
 
+    # Inform build scripts of rustc flags
+    # https://github.com/rust-lang/cargo/issues/9600
+    env["CARGO_ENCODED_RUSTFLAGS"] = "\\x1f".join([
+        # Allow build scripts to locate the generated sysroot
+        "--sysroot=${{pwd}}/{}".format(toolchain.sysroot),
+    ] + ctx.attr.rustc_flags)
+
     for f in ctx.attr.crate_features:
         env["CARGO_FEATURE_" + f.upper().replace("-", "_")] = "1"
 
@@ -136,7 +139,6 @@ def _build_script_impl(ctx):
         direct = [
             script,
             ctx.executable._cargo_build_script_runner,
-            toolchain.rustc,
         ] + ctx.files.data + ctx.files.tools + ([toolchain.target_json] if toolchain.target_json else []),
         transitive = toolchain_tools,
     )
@@ -217,6 +219,16 @@ _build_script_run = rule(
         "links": attr.string(
             doc = "The name of the native library this crate links against.",
         ),
+        "rustc_flags": attr.string_list(
+            doc = dedent("""\
+                List of compiler flags passed to `rustc`.
+
+                These strings are subject to Make variable expansion for predefined
+                source/output path variables like `$location`, `$execpath`, and 
+                `$rootpath`. This expansion is useful if you wish to pass a generated
+                file of arguments to rustc: `@$(location //package:target)`.
+            """),
+        ),
         # The source of truth will be the `cargo_build_script` macro until stardoc
         # implements documentation inheritence. See https://github.com/bazelbuild/stardoc/issues/27
         "script": attr.label(
@@ -262,6 +274,7 @@ def cargo_build_script(
         tools = [],
         links = None,
         rustc_env = {},
+        rustc_flags = [],
         visibility = None,
         tags = None,
         **kwargs):
@@ -333,6 +346,7 @@ def cargo_build_script(
         tools (list, optional): Tools (executables) needed by the build script.
         links (str, optional): Name of the native library this crate links against.
         rustc_env (dict, optional): Environment variables to set in rustc when compiling the build script.
+        rustc_flags (list, optional): List of compiler flags passed to `rustc`.
         visibility (list of label, optional): Visibility to apply to the generated build script output.
         tags: (list of str, optional): Tags to apply to the generated build script output.
         **kwargs: Forwards to the underlying `rust_binary` rule.
@@ -357,6 +371,7 @@ def cargo_build_script(
         deps = deps,
         data = data,
         rustc_env = rustc_env,
+        rustc_flags = rustc_flags,
         tags = binary_tags,
         **kwargs
     )
@@ -370,6 +385,7 @@ def cargo_build_script(
         deps = deps,
         data = data,
         tools = tools,
+        rustc_flags = rustc_flags,
         visibility = visibility,
         tags = tags,
     )

cargo/cargo_build_script_runner/bin.rs

@@ -123,6 +123,15 @@ fn run_buildrs() -> Result<(), String> {
         }
     }
 
+    // Bazel does not support byte strings so in order to correctly represent `CARGO_ENCODED_RUSTFLAGS`
+    // the escaped `\x1f` sequences need to be unescaped
+    if let Ok(encoded_rustflags) = env::var("CARGO_ENCODED_RUSTFLAGS") {
+        command.env(
+            "CARGO_ENCODED_RUSTFLAGS",
+            encoded_rustflags.replace("\\x1f", "\x1f"),
+        );
+    }
+
     let (buildrs_outputs, process_output) = BuildScriptOutput::outputs_from_command(&mut command)
         .map_err(|process_output| {
         format!(

crate_universe/3rdparty/BUILD.bazel

@@ -0,0 +1,20 @@
+load("//crate_universe:crates.bzl", "crate_deps_target")
+
+package(default_visibility = ["//visibility:public"])
+
+crate_deps_target()
+
+filegroup(
+    name = "distro",
+    srcs = glob([
+        "*.bzl",
+        "*.bazel",
+    ]) + [
+        "//crate_universe/3rdparty/crates:srcs",
+    ],
+)
+
+filegroup(
+    name = "bzl_srcs",
+    srcs = glob(["*.bzl"]),
+)