devops: introduce goma infrastructure for Chromium builds (#5377)

This patch adds `//browser_patches/chromium/goma.sh` script that
manages goma to build chromium.

browser_patches/chromium/.gitignore

@@ -1,2 +1,3 @@
 /output
 /depot_tools
+/electron-build-tools

browser_patches/chromium/build.sh

@@ -6,7 +6,7 @@ trap "cd $(pwd -P)" EXIT
 cd "$(dirname $0)"
 
 USAGE=$(cat<<EOF
-  usage: $(basename $0) [--mirror|--mirror-linux|--mirror-win32|--mirror-win64|--mirror-mac|--compile-mac-arm64]
+  usage: $(basename $0) [--mirror|--mirror-linux|--mirror-win32|--mirror-win64|--mirror-mac|--compile-mac-arm64|--compile-linux|--compile-win32|--compile-win64|--compile-mac]
 
   Either compiles chromium or mirrors it from Chromium Continuous Builds CDN.
 EOF
@@ -121,6 +121,9 @@ compile_chromium() {
       "swiftshader"
       "v8_context_snapshot.bin"
     )
+  else
+    echo "ERROR: unknown command, use --help for details"
+    exit 1
   fi
 
   # Get chromium SHA from the build revision.
@@ -163,15 +166,29 @@ EOF
     echo 'target_cpu = "x86"' >> ./out/Default/args.gn
   fi
 
+  if [[ ! -z "$USE_GOMA" ]]; then
+    echo 'use_goma = true' >> ./out/Default/args.gn
+    echo "goma_dir = '${SCRIPT_PATH}/electron-build-tools/third_party/goma'" >> ./out/Default/args.gn
+  fi
+
   if [[ $1 == "--compile-win"* ]]; then
-    /c/Windows/System32/cmd.exe "/c $(cygpath -w ${SCRIPT_PATH}/buildwin.bat)"
+    if [[ -z "$USE_GOMA" ]]; then
+      /c/Windows/System32/cmd.exe "/c $(cygpath -w ${SCRIPT_PATH}/buildwin.bat)"
+    else
+      /c/Windows/System32/cmd.exe "/c $(cygpath -w ${SCRIPT_PATH}/buildwingoma.bat)"
+    fi
   else
     gn gen out/Default
-    autoninja -C out/Default chrome
-  fi
-
-  if [[ $1 == "--compile-linux" ]]; then
-    autoninja -C out/Default chrome_sandbox clear_key_cdm
+    if [[ $1 == "--compile-linux" ]]; then
+      TARGETS="chrome chrome_sandbox clear_key_cdm"
+    else
+      TARGETS="chrome"
+    fi
+    if [[ -z "$USE_GOMA" ]]; then
+      autoninja -C out/Default $TARGETS
+    else
+      ninja -j 200 -C out/Default $TARGETS
+    fi
   fi
 
   # Prepare resulting archive.

browser_patches/chromium/buildwingoma.bat

@@ -0,0 +1,2 @@
+CALL gn gen out/Default
+CALL ninja -j 200 -C out/Default chrome

browser_patches/chromium/goma.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+set -e
+set +x
+
+trap "cd $(pwd -P)" EXIT
+cd "$(dirname $0)"
+
+if [[ ! -d ./electron-build-tools ]]; then
+  git clone --single-branch --branch msft-goma  https://github.com/electron/build-tools/ electron-build-tools
+  cd electron-build-tools
+  npm install
+  mkdir -p third_party
+  ./src/e update-goma msftGoma
+  cd ..
+fi
+
+cd electron-build-tools
+
+if [[ $1 == "--help" ]]; then
+  echo "$(basename $0) [login|start|stop|--help]"
+  exit 0
+elif [[ $1 == "login" ]]; then
+  python ./third_party/goma/goma_auth.py login
+elif [[ $1 == "start" ]]; then
+  if [[ ! -z "$GOMA_LOGIN_COOKIE" ]]; then
+    echo "$GOMA_LOGIN_COOKIE" > "$HOME/.goma_oauth2_config"
+  fi
+  if [[ ! -f "$HOME/.goma_oauth2_config" ]]; then
+    echo "ERROR: goma is not logged in!"
+    echo "run '$(basename $0) login'"
+    exit 1
+  fi
+  python ./third_party/goma/goma_ctl.py ensure_start
+elif [[ $1 == "stop" ]]; then
+  python ./third_party/goma/goma_ctl.py stop
+else
+  echo "ERROR: unknown command - $1"
+  echo "Use --help to list all available commands"
+  exit 1
+fi
+