bazel-registry: Add .envoy suffix to xscan-fat-runtime version

[Copilot]

All bazel-registry modules use .envoy version suffixes. The newly created xscan-fat-runtime module used 1.0.0 instead of 1.0.0.envoy.

Changes

• Renamed version directory: 1.0.0 → 1.0.0.envoy
• Updated metadata.json and MODULE.bazel to reference 1.0.0.envoy

Now consistent with hyperscan (5.4.2.envoy), ragel (7.0.4-211228-d4577c9.envoy), and all other modules.

Original prompt

Create xscan-fat-runtime module

Background

PR #3675 implements a fat runtime for hyperscan with symbol renaming to support multiple CPU architecture variants. This pattern will also be needed for vectorscan (the ARM-focused fork of hyperscan). Rather than duplicating the logic, we should extract it into a shared module.

Task

Create a new Bazel module xscan-fat-runtime that provides the fat runtime symbol renaming infrastructure for both hyperscan and vectorscan.

Implementation

Create the following structure:

bazel-registry/modules/xscan-fat-runtime/
├── metadata.json
├── 1.0.0/
│   ├── MODULE.bazel
│   ├── source.json
│   └── overlay/
│       ├── BUILD.bazel
│       └── fat_runtime.bzl

metadata.json

{
    "homepage": "https://github.com/envoyproxy/toolshed",
    "maintainers": [
        {
            "name": "Envoy maintainers",
            "github": "envoyproxy"
        }
    ],
    "versions": [
        "1.0.0"
    ],
    "yanked_versions": {}
}

1.0.0/MODULE.bazel

module(
    name = "xscan-fat-runtime",
    version = "1.0.0",
    bazel_compatibility = [">=7.2.1"],
    compatibility_level = 1,
)

bazel_dep(name = "rules_cc", version = "0.1.1")
bazel_dep(name = "platforms", version = "0.0.11")

1.0.0/source.json

This should be a local/empty source since the module is purely overlay-based. Use appropriate format for a toolshed-local module.

1.0.0/overlay/BUILD.bazel

load("@rules_cc//cc:defs.bzl", "cc_library")

package(default_visibility = ["//visibility:public"])

exports_files(["fat_runtime.bzl"])

1.0.0/overlay/fat_runtime.bzl

Extract the fat runtime implementation from PR #3675's bazel-registry/modules/hyperscan/5.4.2.envoy/overlay/fat_runtime.bzl, containing:

1. XSCAN_KEEP_SYMBOLS - The keep-list for symbol renaming, including:

   • Hyperscan/vectorscan allocation hooks: hs_misc_alloc, hs_misc_free, hs_database_alloc, hs_database_free, hs_scratch_alloc, hs_scratch_free, hs_stream_alloc, hs_stream_free, hs_free_scratch
   • Cross-library symbols: ^mmbit_
   • System/libc symbols: ^_, ^malloc$, ^free$, ^calloc$, ^realloc$, ^memcpy$, ^memmove$, ^memset$, ^memcmp$, ^strlen$, ^strcmp$, ^strncmp$, ^strcpy$, ^strncpy$, ^printf$, ^fprintf$, ^sprintf$, ^snprintf$, ^abort$, ^exit$, ^pthread_

2. rename_symbols rule - The Starlark rule that:

   • Uses find_cc_toolchain() and use_cc_toolchain() for hermetic toolchain access
   • Gets the ar tool via cc_common.get_tool_for_action() with ACTION_NAMES.cpp_link_static_library
   • Derives nm and objcopy paths from the ar path (supporting LLVM toolchain layout)
   • Extracts objects from archive, renames symbols with prefix (excluding keep-list), recreates archive
   • Returns DefaultInfo with the renamed archive

3. exec_variant macro - A macro that:

   • Takes parameters: name, arch, march_flag, common_lib, srcs, hdrs, copts, includes, target_constraints, extra_keep_symbols (optional)
   • Creates a cc_library with the arch-specific compilation flags
   • Calls rename_symbols to rename the symbols with the arch prefix
   • Creates a cc_import for the renamed static library
   • Creates a final cc_library that exports the renamed variant

The implementation should be extracted/adapted from the working code in PR #3675's fat_runtime.bzl.

Notes

• Do NOT modify the hyperscan module - the user will hook it up themselves for testing
• The module should be self-contained and usable by both hyperscan and vectorscan
• Follow the existing patterns in the toolshed bazel-registry for module structure

This pull request was created from Copilot chat.

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