Initialize sccache dir right away

Author: weliveindetail

utils/build.ps1

@@ -142,7 +142,7 @@ param(
   [switch] $Clean,
   [switch] $DebugInfo,
   [switch] $EnableCaching,
-  [string] $Cache = "",
+  [string] $Cache = "$BinaryCache\sccache",
   [string] $Allocator = "",
   [switch] $Summary,
   [switch] $ToBatch
@@ -958,11 +958,7 @@ function Build-CMakeProject {
 
     if ($EnableCaching) {
       $env:SCCACHE_DIRECT = "true"
-      if ($Cache -eq "") {
-        $env:SCCACHE_DIR = "$BinaryCache\sccache"
-      } else {
-        $env:SCCACHE_DIR = $Cache
-      }
+      $env:SCCACHE_DIR = $Cache
     }
     if ($UseSwiftSwiftDriver) {
       $env:SWIFT_DRIVER_SWIFT_FRONTEND_EXEC = ([IO.Path]::Combine($CompilersBinaryCache, "bin", "swift-frontend.exe"))