build: use siso instead of reclient (#48154)

* build: use siso instead of reclient

Co-authored-by: Samuel Attard <samuel.r.attard@gmail.com>

* build: remove no longer needed arg for siso

* build: fix ffmpeg build with siso

---------

Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Samuel Attard <samuel.r.attard@gmail.com>
Co-authored-by: John Kleinschmidt <jkleinsc@electronjs.org>

build/args/all.gn

@@ -69,7 +69,3 @@ v8_expose_public_symbols = true
 # Disable snapshotting a page when printing for its content to be analyzed for
 # sensitive content by enterprise users.
 enterprise_cloud_content_analysis = false
-
-# Disable siso until we are ready to use it.
-# https://chromium-review.googlesource.com/c/chromium/src/+/6638830
-use_siso = false

build/siso/backend.star

@@ -3,7 +3,7 @@
 load("@builtin//struct.star", "module")
 
 def __platform_properties(ctx):
-    container_image = "docker://gcr.io/chops-public-images-prod/rbe/siso-chromium/linux@sha256:ef35d347f4a4a2d32b76fd908e66e96f59bf8ba7379fd5626548244c45343b2b"
+    container_image = "docker://gcr.io/chops-public-images-prod/rbe/siso-chromium/linux@sha256:d7cb1ab14a0f20aa669c23f22c15a9dead761dcac19f43985bf9dd5f41fbef3a"
     return {
         "default": {
             "OSFamily": "Linux",

build/siso/main.star

@@ -0,0 +1,66 @@
+load("@builtin//encoding.star", "json")
+load("@builtin//path.star", "path")
+load("@builtin//runtime.star", "runtime")
+load("@builtin//struct.star", "module")
+load("@config//main.star", upstream_init = "init")
+load("@config//win_sdk.star", "win_sdk")
+load("@config//gn_logs.star", "gn_logs")
+
+def init(ctx):
+    mod = upstream_init(ctx)
+    step_config = json.decode(mod.step_config)
+
+    # Buildbarn doesn't support input_root_absolute_path so disable that
+    for rule in step_config["rules"]:    
+      input_root_absolute_path = rule.get("input_root_absolute_path", False)
+      if input_root_absolute_path:
+        rule.pop("input_root_absolute_path", None)
+
+    # Only wrap clang rules with a remote wrapper if not on Linux. These are currently only
+    # needed for X-Compile builds, which run on Windows and Mac.
+    if runtime.os != "linux":
+      for rule in step_config["rules"]:
+        if rule["name"].startswith("clang/") or rule["name"].startswith("clang-cl/"):
+          rule["remote_wrapper"] = "../../buildtools/reclient_cfgs/chromium-browser-clang/clang_remote_wrapper"
+          if "inputs" not in rule:
+            rule["inputs"] = []
+          rule["inputs"].append("buildtools/reclient_cfgs/chromium-browser-clang/clang_remote_wrapper")
+          rule["inputs"].append("third_party/llvm-build/Release+Asserts_linux/bin/clang")
+
+      if "executables" not in step_config:
+        step_config["executables"] = []
+      step_config["executables"].append("buildtools/reclient_cfgs/chromium-browser-clang/clang_remote_wrapper")
+      step_config["executables"].append("third_party/llvm-build/Release+Asserts_linux/bin/clang")
+
+    if runtime.os == "darwin":
+      # Update platforms to match our default siso config instead of reclient configs.
+      step_config["platforms"].update({
+          "clang": step_config["platforms"]["default"],
+          "clang_large": step_config["platforms"]["default"],          
+      })      
+
+    if runtime.os == "windows":
+      # Add additional Windows SDK headers needed by Electron      
+      win_toolchain_dir = win_sdk.toolchain_dir(ctx)
+      if win_toolchain_dir:
+        sdk_version = gn_logs.read(ctx).get("windows_sdk_version")
+        step_config["input_deps"][win_toolchain_dir + ":headers"].extend([
+          # third_party/electron_node/deps/uv/include/uv/win.h includes mswsock.h
+          path.join(win_toolchain_dir, "Windows Kits/10/Include", sdk_version, "um/mswsock.h"),
+          # third_party/electron_node/src/debug_utils.cc includes lm.h
+          path.join(win_toolchain_dir, "Windows Kits/10/Include", sdk_version, "um/Lm.h"),          
+        ])
+      
+      # Update platforms to match our default siso config instead of reclient configs.
+      step_config["platforms"].update({
+          "clang-cl": step_config["platforms"]["default"],
+          "clang-cl_large": step_config["platforms"]["default"],
+          "lld-link": step_config["platforms"]["default"],
+      })
+
+    return module(
+      "config",
+      step_config = json.encode(step_config),
+      filegroups = mod.filegroups,
+      handlers = mod.handlers,
+    )