chore: Update alpha-build.sh script to handle xvfb-run not found and set LLVM_PROFDATA path conditionally

.github/workflows/src/alpha-build.sh

@@ -1,4 +1,4 @@
-set -x
+set -ex
 
 export ZEN_RELEASE=1
 
@@ -13,16 +13,12 @@ if ! command -v Xvfb &> /dev/null
 then
   ulimit -n 4096
   Xvfb :2 -screen 0 1024x768x24 &
-  # Check if dir exists
-  if [ -d $HOME/win-cross ]
-  then
-    export LLVM_PROFDATA="$HOME/win-cross/clang/bin/llvm-profdata"
-  else
-    export LLVM_PROFDATA=$HOME/.mozbuild/clang/bin/llvm-profdata
-  fi
+  export LLVM_PROFDATA=$HOME/.mozbuild/clang/bin/llvm-profdata
   export DISPLAY=:2
   pnpm build
 else
   echo "Xvfb could not be found, running without it"
+  echo "ASSUMING YOU ARE RUNNING THIS ON MACOS"
+  set -v
   pnpm build
 fi

configs/common/mozconfig

@@ -66,6 +66,9 @@ if test "$ZEN_RELEASE"; then
     ac_add_options --enable-lto=full
   fi
 
+  export MOZ_PGO=1
+  ac_add_options MOZ_PGO=1
+
   mk_add_options MOZILLA_OFFICIAL=1
 
   MOZILLA_OFFICIAL=1

configs/linux/mozconfig

@@ -19,11 +19,6 @@ if ! test "$ZEN_CROSS_COMPILING"; then
     export STRIP_FLAGS="--strip-debug --strip-unneeded"
 fi
 
-if test "$ZEN_RELEASE"; then
-    export MOZ_PGO=1
-    ac_add_options MOZ_PGO=1
-fi
-
 # Disable telemetry and tracking
 mk_add_options MOZ_TELEMETRY_REPORTING=
 mk_add_options MOZ_DATA_REPORTING=