feat(wrpc): add wrpc and wit-bindgen-wrpc to JSON registry (Phase 2)

checksums/tools/wit-bindgen-wrpc.json

@@ -0,0 +1,41 @@
+{
+  "tool_name": "wit-bindgen-wrpc",
+  "github_repo": "bytecodealliance/wrpc",
+  "latest_version": "0.16.0",
+  "last_checked": "2026-02-07T00:00:00Z",
+  "description": "WIT binding generator for WebAssembly Component RPC (wrpc)",
+  "versions": {
+    "0.16.0": {
+      "release_date": "2025-11-18",
+      "platforms": {
+        "darwin_arm64": {
+          "sha256": "d2ef54ca193ee3d16cd23c67adb42713dc8ba2c96968eff53b9bcc3051466a65",
+          "url_suffix": "wit-bindgen-wrpc-aarch64-apple-darwin"
+        },
+        "darwin_amd64": {
+          "sha256": "e60efb3198774996f250e0168fd555cd9c6e056f863dc3983f373df119d2cdc4",
+          "url_suffix": "wit-bindgen-wrpc-x86_64-apple-darwin"
+        },
+        "linux_amd64": {
+          "sha256": "ce66c70da2f612c91c5d42b4eff86773dd7d13821b4c6eccea4d1dd62c399326",
+          "url_suffix": "wit-bindgen-wrpc-x86_64-unknown-linux-musl"
+        },
+        "linux_arm64": {
+          "sha256": "b35772253ef4030ec8b420fde3145610e5de44350d89a0e5135c53248a4f1f9e",
+          "url_suffix": "wit-bindgen-wrpc-aarch64-unknown-linux-musl"
+        },
+        "windows_amd64": {
+          "sha256": "e08a74f717e77372cf1104e4da6c3aa301c9283ae13b984a55b67bd6ebf84a51",
+          "url_suffix": "wit-bindgen-wrpc-x86_64-pc-windows-gnu.exe"
+        }
+      }
+    }
+  },
+  "supported_platforms": [
+    "darwin_amd64",
+    "darwin_arm64",
+    "linux_amd64",
+    "linux_arm64",
+    "windows_amd64"
+  ]
+}

checksums/tools/wrpc.json

@@ -0,0 +1,42 @@
+{
+  "tool_name": "wrpc",
+  "github_repo": "bytecodealliance/wrpc",
+  "latest_version": "0.16.0",
+  "last_checked": "2026-02-07T00:00:00Z",
+  "description": "WebAssembly Component RPC runtime (wrpc-wasmtime)",
+  "binary_name": "wrpc-wasmtime",
+  "versions": {
+    "0.16.0": {
+      "release_date": "2025-11-18",
+      "platforms": {
+        "darwin_arm64": {
+          "sha256": "4bb3341c8b8ad5d96b87dd95ee1e7e091104d4f64ea83b690ad50a9639b834e1",
+          "url_suffix": "wrpc-wasmtime-aarch64-apple-darwin"
+        },
+        "darwin_amd64": {
+          "sha256": "9d198256eb72f6246fa424b1f3c384f9eac8476b7da59ac1ddb65323bb2ccb57",
+          "url_suffix": "wrpc-wasmtime-x86_64-apple-darwin"
+        },
+        "linux_amd64": {
+          "sha256": "5669a01a64da8954b864df9ec934fd8ef318446f7d8f97263d27fbd5f30c07a8",
+          "url_suffix": "wrpc-wasmtime-x86_64-unknown-linux-musl"
+        },
+        "linux_arm64": {
+          "sha256": "542810b5bd159b2d412fc6a0a32f17e53b9732fca8c9ea66f2bdef1d807cdc9f",
+          "url_suffix": "wrpc-wasmtime-aarch64-unknown-linux-musl"
+        },
+        "windows_amd64": {
+          "sha256": "bb28a2da97805be2cf3be146bdf68931e3dada7598be3d7750551a5824d2b4a5",
+          "url_suffix": "wrpc-wasmtime-x86_64-pc-windows-gnu.exe"
+        }
+      }
+    }
+  },
+  "supported_platforms": [
+    "darwin_amd64",
+    "darwin_arm64",
+    "linux_amd64",
+    "linux_arm64",
+    "windows_amd64"
+  ]
+}

toolchains/tool_registry.bzl

@@ -125,6 +125,18 @@ _URL_PATTERNS = {
         "base": "https://github.com/{repo}/releases/download/{version}",
         "filename": "componentize-py-{version}-{suffix}",
     },
+    "wrpc": {
+        # wrpc releases are standalone binaries (wrpc-wasmtime)
+        "base": "https://github.com/{repo}/releases/download/v{version}",
+        "filename": "{suffix}",  # url_suffix IS the filename (e.g., "wrpc-wasmtime-aarch64-apple-darwin")
+        "is_binary": True,
+    },
+    "wit-bindgen-wrpc": {
+        # wit-bindgen-wrpc releases are standalone binaries
+        "base": "https://github.com/{repo}/releases/download/v{version}",
+        "filename": "{suffix}",  # url_suffix IS the filename (e.g., "wit-bindgen-wrpc-aarch64-apple-darwin")
+        "is_binary": True,
+    },
 }
 
 def _build_download_url(tool_name, version, platform, tool_info, github_repo):

toolchains/tool_versions.bzl

@@ -38,6 +38,10 @@ TOOL_VERSIONS = {
     # Signatures and security
     "wasmsign2": "0.2.6",     # WebAssembly signing tool
 
+    # WRPC (WebAssembly Component RPC)
+    "wrpc": "0.16.0",         # wrpc-wasmtime runtime for component RPC
+    "wit-bindgen-wrpc": "0.16.0",  # WIT binding generator for wrpc
+
     # Platform SDKs
     "wasi-sdk": "29",         # WASI SDK for C/C++ compilation
     "tinygo": "0.39.0",       # TinyGo compiler for Go→WASM

toolchains/wasm_toolchain.bzl

@@ -47,6 +47,7 @@ def _wasm_tools_toolchain_impl(ctx):
         wac = ctx.file.wac,
         wit_bindgen = ctx.file.wit_bindgen,
         wrpc = ctx.file.wrpc,
+        wit_bindgen_wrpc = ctx.file.wit_bindgen_wrpc,
         wasmsign2 = ctx.file.wasmsign2,
     )
 
@@ -77,7 +78,13 @@ wasm_tools_toolchain = rule(
             allow_single_file = True,
             executable = True,
             cfg = "exec",
-            doc = "wrpc binary",
+            doc = "wrpc-wasmtime runtime binary",
+        ),
+        "wit_bindgen_wrpc": attr.label(
+            allow_single_file = True,
+            executable = True,
+            cfg = "exec",
+            doc = "wit-bindgen-wrpc binding generator binary",
         ),
         "wasmsign2": attr.label(
             allow_single_file = True,
@@ -86,7 +93,7 @@ wasm_tools_toolchain = rule(
             doc = "wasmsign2 WebAssembly signing binary",
         ),
     },
-    doc = "Declares a WebAssembly toolchain with signing support",
+    doc = "Declares a WebAssembly toolchain with WRPC and signing support",
 )
 
 # Platform detection now uses tool_registry.detect_platform
@@ -329,12 +336,8 @@ echo "Basic WebAssembly component functionality is not affected"
 exit 0
 """, executable = True)
 
-    # Create placeholder wrpc binary for compatibility
-    repository_ctx.file("wrpc", """#!/bin/bash
-echo "wrpc disabled for production stability"
-echo "Use system wrpc or enable building from source"
-exit 1
-""", executable = True)
+    # Download wrpc tools from registry (Phase 2 WRPC modernization)
+    _download_wrpc_tools(repository_ctx, platform)
 
     print("Successfully set up all tools")
 
@@ -504,23 +507,44 @@ def _download_wit_bindgen(repository_ctx):
     # Use unified tool_registry for download
     tool_registry.download(repository_ctx, "wit-bindgen", wit_bindgen_version, platform)
 
-def _download_wrpc(repository_ctx):
-    """Download wrpc using modernized git_repository approach"""
+def _download_wrpc_tools(repository_ctx, platform):
+    """Download wrpc and wit-bindgen-wrpc from registry (Phase 2 WRPC modernization)"""
 
-    print("Using modernized wrpc from @wrpc_src git repository")
+    # Get versions from tool_versions.bzl
+    wrpc_version = get_tool_version("wrpc")
+    wit_bindgen_wrpc_version = get_tool_version("wit-bindgen-wrpc")
 
-    # Link to git_repository-based wrpc build instead of manual git clone + cargo build
-    if repository_ctx.path("../wrpc_src").exists:
-        repository_ctx.symlink("../wrpc_src/wrpc-wasmtime", "wrpc")
-        print("Linked wrpc from git repository")
+    # Check if wrpc is available for this platform
+    wrpc_info = get_tool_info(repository_ctx, "wrpc", wrpc_version, platform)
+    if wrpc_info:
+        print("Downloading wrpc {} for {}".format(wrpc_version, platform))
+        tool_registry.download(repository_ctx, "wrpc", wrpc_version, platform, output_name = "wrpc")
     else:
-        print("Warning: @wrpc_src git repository not available")
+        print("Warning: wrpc {} not available for platform {}".format(wrpc_version, platform))
         repository_ctx.file("wrpc", """#!/bin/bash
-echo "wrpc: modernized git repository build not available"
-echo "Ensure @wrpc_src is properly configured in MODULE.bazel"
+echo "wrpc: Not available for this platform"
+echo "Use system wrpc or build from source"
 exit 1
 """, executable = True)
 
+    # Check if wit-bindgen-wrpc is available for this platform
+    wit_bindgen_wrpc_info = get_tool_info(repository_ctx, "wit-bindgen-wrpc", wit_bindgen_wrpc_version, platform)
+    if wit_bindgen_wrpc_info:
+        print("Downloading wit-bindgen-wrpc {} for {}".format(wit_bindgen_wrpc_version, platform))
+        tool_registry.download(repository_ctx, "wit-bindgen-wrpc", wit_bindgen_wrpc_version, platform, output_name = "wit-bindgen-wrpc")
+    else:
+        print("Warning: wit-bindgen-wrpc {} not available for platform {}".format(wit_bindgen_wrpc_version, platform))
+        repository_ctx.file("wit-bindgen-wrpc", """#!/bin/bash
+echo "wit-bindgen-wrpc: Not available for this platform"
+echo "Use system wit-bindgen-wrpc or build from source"
+exit 1
+""", executable = True)
+
+def _download_wrpc(repository_ctx):
+    """Legacy wrpc download - redirects to new implementation"""
+    platform = tool_registry.detect_platform(repository_ctx)
+    _download_wrpc_tools(repository_ctx, platform)
+
 def _download_wasmsign2(repository_ctx):
     """Setup wasmsign2 placeholder - not available in prebuilt downloads"""
 
@@ -586,6 +610,12 @@ alias(
     visibility = ["//visibility:public"],
 )
 
+alias(
+    name = "wit_bindgen_wrpc_binary",
+    actual = "@wrpc_src//:wit_bindgen_wrpc_binary",
+    visibility = ["//visibility:public"],
+)
+
 # wasmsign2 not available in build strategy
 filegroup(
     name = "wasmsign2_binary",
@@ -600,6 +630,7 @@ wasm_tools_toolchain(
     wac = ":wac_binary",
     wit_bindgen = ":wit_bindgen_binary",
     wrpc = ":wrpc_binary",
+    wit_bindgen_wrpc = ":wit_bindgen_wrpc_binary",
     wasmsign2 = ":wasmsign2_binary",
 )
 
@@ -646,6 +677,12 @@ filegroup(
     visibility = ["//visibility:public"],
 )
 
+filegroup(
+    name = "wit_bindgen_wrpc_binary",
+    srcs = ["{wit_bindgen_wrpc_bin}"],
+    visibility = ["//visibility:public"],
+)
+
 filegroup(
     name = "wasmsign2_binary",
     srcs = ["{wasmsign2_bin}"],
@@ -659,6 +696,7 @@ wasm_tools_toolchain(
     wac = ":wac_binary",
     wit_bindgen = ":wit_bindgen_binary",
     wrpc = ":wrpc_binary",
+    wit_bindgen_wrpc = ":wit_bindgen_wrpc_binary",
     wasmsign2 = ":wasmsign2_binary",
 )
 
@@ -680,6 +718,7 @@ toolchain(
             wac_bin = "wac{}".format(exe_suffix),
             wit_bindgen_bin = "wit-bindgen{}".format(exe_suffix),
             wrpc_bin = "wrpc{}".format(exe_suffix),
+            wit_bindgen_wrpc_bin = "wit-bindgen-wrpc{}".format(exe_suffix),
             wasmsign2_bin = "wasmsign2{}".format(exe_suffix),
         )
 

wrpc/defs.bzl

@@ -11,35 +11,35 @@ def _wrpc_bindgen_impl(ctx):
 
     Generates language bindings for wrpc from WIT interfaces.
     Uses ctx.actions.run() for direct tool invocation (Bazel best practice).
+
+    Note: This rule uses wit-bindgen-wrpc (the binding generator), not wrpc-wasmtime
+    (the RPC runtime). wrpc-wasmtime is used by wrpc_serve and wrpc_invoke rules.
     """
 
-    # Get the wasm toolchain (which includes wrpc)
+    # Get the wasm toolchain (which includes wit-bindgen-wrpc)
     wasm_toolchain = ctx.toolchains["//toolchains:wasm_tools_toolchain_type"]
-    wrpc = wasm_toolchain.wrpc
+    wit_bindgen_wrpc = wasm_toolchain.wit_bindgen_wrpc
 
     # Output files
     output_dir = ctx.actions.declare_directory(ctx.attr.name + "_bindings")
 
     # Input WIT file
     wit_file = ctx.file.wit
 
-    # Build command arguments
+    # Build command arguments for wit-bindgen-wrpc
     args = ctx.actions.args()
-    args.add("generate")
+    args.add(ctx.attr.language)  # wit-bindgen-wrpc <language> <options>
     args.add("--world", ctx.attr.world)
-    args.add("--wit", wit_file.path)
-    args.add("--output", output_dir.path)
-
-    if ctx.attr.language:
-        args.add("--language", ctx.attr.language)
+    args.add("--out-dir", output_dir.path)
+    args.add(wit_file.path)
 
-    # Run wrpc generate - uses ctx.actions.run() (Bazel best practice)
+    # Run wit-bindgen-wrpc - uses ctx.actions.run() (Bazel best practice)
     ctx.actions.run(
-        executable = wrpc,
+        executable = wit_bindgen_wrpc,
         arguments = [args],
         inputs = [wit_file],
         outputs = [output_dir],
-        mnemonic = "WrpcBindgen",
+        mnemonic = "WitBindgenWrpc",
         progress_message = "Generating wrpc bindings for {}".format(ctx.attr.name),
     )