build: align release workflow with Linux cross-compile, drop in-repo main.star

- windows-publish.yml: move all three publish jobs to the Linux runner +
  ghcr.io/electron/build container (matching build.yml). The publish
  segment was regenerated from -build.yml and now assumes a Linux host;
  leaving releases on Windows runners would have broken them.
- build-electron/action.yml: drop the Profile Windows Toolchain step.
  profile_toolchain.py reads installed_software.json (a Windows-host WMI
  dump that no longer exists); upload.py's consumer of the resulting
  windows_toolchain_profile.json is gated on sys.platform == 'win32' so
  it's skipped on the Linux host anyway.
- pipeline-segment-electron-{build,publish}.yml: drop the
  rm -rf vs_files* — the checkout cache doesn't include the toolchain,
  so this was a no-op. Keep the e d vs_toolchain.py update --force which
  actually fetches it.
- Drop build/siso/main.star + ELECTRON_BUILD_TOOLS_MAIN_STAR and bump
  BUILD_TOOLS_SHA to 03f1603 (electron/build-tools#840), which has the
  win_sdk.enabled() gate so the in-repo override is no longer needed.

.github/actions/build-electron/action.yml

@@ -44,7 +44,6 @@ runs:
       run: |
         GN_APPENDED_ARGS="$GN_EXTRA_ARGS target_os=\"win\" target_cpu=\"${{ inputs.target-arch }}\" use_v8_context_snapshot=true"
         echo "GN_EXTRA_ARGS=$GN_APPENDED_ARGS" >> $GITHUB_ENV
-        echo "ELECTRON_BUILD_TOOLS_MAIN_STAR=`pwd`/src/electron/build/siso/main.star" >> $GITHUB_ENV
     - name: Add Clang problem matcher
       shell: bash
       run: echo "::add-matcher::src/electron/.github/problem-matchers/clang.json"
@@ -154,12 +153,6 @@ runs:
           fi
           electron/script/zip_manifests/check-zip-manifest.py out/Default/chromedriver.zip electron/script/zip_manifests/chromedriver_zip.$target_os.${{ inputs.target-arch }}.manifest
         fi
-    - name: Profile Windows Toolchain ${{ inputs.step-suffix }}
-      shell: bash
-      if: ${{ inputs.is-release == 'true' && inputs.target-platform == 'win' }}
-      run: |
-        cd src
-        python3 electron/build/profile_toolchain.py --output-json=out/Default/windows_toolchain_profile.json
     - name: Add msdia140.dll to Path ${{ inputs.step-suffix }}
       shell: bash
       if: ${{ inputs.is-release == 'true' && inputs.target-platform == 'win' }}

.github/actions/install-build-tools/action.yml

@@ -15,7 +15,7 @@ runs:
         git config --global core.preloadindex true
         git config --global core.longpaths true
       fi
-      export BUILD_TOOLS_SHA=1aa9dce0b3fa9353c38a6c3d4aac0249f0f68973
+      export BUILD_TOOLS_SHA=03f1603d5698368077ae830599b0b6f6248325b1
       npm i -g @electron/build-tools
       # Update depot_tools to ensure python
       e d update_depot_tools

.github/workflows/pipeline-segment-electron-build.yml

@@ -191,9 +191,6 @@ jobs:
         e init -f --root=$(pwd) --out=Default ${{ inputs.gn-build-type }} --import ${{ inputs.gn-build-type }} --target-cpu ${{ inputs.target-arch }} --remote-build siso
     - name: Run Electron Only Hooks
       run: |
-        if [ "${{ inputs.target-platform }}" = "win" ]; then
-          rm -rf src/third_party/depot_tools/win_toolchain/vs_files*
-        fi
         echo "solutions=[{'name':'src/electron','url':None,'deps_file':'DEPS','custom_vars':{'process_deps':False},'managed':False}]" > tmpgclient
         if [ "${{ inputs.target-platform }}" = "win" ]; then
           echo "target_os=['win']" >> tmpgclient

.github/workflows/pipeline-segment-electron-publish.yml

@@ -202,9 +202,6 @@ jobs:
           inputs.target-arch }} --remote-build siso
       - name: Run Electron Only Hooks
         run: |
-          if [ "${{ inputs.target-platform }}" = "win" ]; then
-            rm -rf src/third_party/depot_tools/win_toolchain/vs_files*
-          fi
           echo "solutions=[{'name':'src/electron','url':None,'deps_file':'DEPS','custom_vars':{'process_deps':False},'managed':False}]" > tmpgclient
           if [ "${{ inputs.target-platform }}" = "win" ]; then
             echo "target_os=['win']" >> tmpgclient

.github/workflows/windows-publish.yml

@@ -61,7 +61,8 @@ jobs:
     needs: checkout-windows
     with:
       environment: production-release
-      build-runs-on: electron-arc-centralus-windows-amd64-16core
+      build-runs-on: electron-arc-centralus-linux-amd64-32core
+      build-container: '{"image":"ghcr.io/electron/build:${{ needs.checkout-windows.outputs.build-image-sha }}","options":"--user root --device /dev/fuse --cap-add SYS_ADMIN","volumes":["/mnt/win-cache:/mnt/win-cache"]}'
       target-platform: win
       target-arch: x64
       is-release: true
@@ -80,7 +81,8 @@ jobs:
     needs: checkout-windows
     with:
       environment: production-release
-      build-runs-on: electron-arc-centralus-windows-amd64-16core
+      build-runs-on: electron-arc-centralus-linux-amd64-32core
+      build-container: '{"image":"ghcr.io/electron/build:${{ needs.checkout-windows.outputs.build-image-sha }}","options":"--user root --device /dev/fuse --cap-add SYS_ADMIN","volumes":["/mnt/win-cache:/mnt/win-cache"]}'
       target-platform: win
       target-arch: arm64
       is-release: true
@@ -99,7 +101,8 @@ jobs:
     needs: checkout-windows
     with:
       environment: production-release
-      build-runs-on: electron-arc-centralus-windows-amd64-16core
+      build-runs-on: electron-arc-centralus-linux-amd64-32core
+      build-container: '{"image":"ghcr.io/electron/build:${{ needs.checkout-windows.outputs.build-image-sha }}","options":"--user root --device /dev/fuse --cap-add SYS_ADMIN","volumes":["/mnt/win-cache:/mnt/win-cache"]}'
       target-platform: win
       target-arch: x86
       is-release: true

build/siso/main.star

@@ -1,69 +0,0 @@
-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"],
-      })
-
-    # Add additional Windows SDK headers needed by Electron. Use
-    # win_sdk.enabled() (target_os == "win") rather than runtime.os so this
-    # also applies when cross-compiling Windows on a Linux host.
-    if win_sdk.enabled(ctx):
-      win_toolchain_dir = win_sdk.toolchain_dir(ctx)
-      sdk_version = gn_logs.read(ctx).get("windows_sdk_version")
-      if win_toolchain_dir and sdk_version and (win_toolchain_dir + ":headers") in step_config["input_deps"]:
-        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"),
-        ])
-
-    if runtime.os == "windows":
-      # 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,
-    )