Remove cache configuration from EanbleCaching

EnableCaching should only configure cmake to allow for sccache usage, it
should not configure sccache itself in any way. Those configuration
options should be deferred into the environment variables that sccache
will look for when it starts up.

Author: brianmichel

utils/build.ps1

@@ -80,14 +80,8 @@ If set, skips building the msi's and installer
 If set, debug information will be generated for the builds.
 
 .PARAMETER EnableCaching
-If true, use `sccache` to cache the build rules.
-
-.PARAMETER Cache
-The path to a directory where the `sccache` stores the cache. By default, it will point to `$BinaryCache\sccache`.
-
-.PARAMETER EnableRemoteCaching
-If true, use `sccache` to cache the build rules remotely. If set, ensure that you configure the appropriate
-remote caching backend location and credentials environment variables for sccache.
+If true, use `sccache` to cache the build rules. Configuration of sccache must be done through
+the environment variables defined by the sccache project.
 
 .PARAMETER Clean
 If true, clean non-compiler builds while building.
@@ -171,14 +165,9 @@ param
   [string] $Variant = "Asserts",
   [switch] $Clean,
   [switch] $DebugInfo,
-  [parameter(ParameterSetName = "LocalCaching")]
   [switch] $EnableCaching,
-  [parameter(ParameterSetName = "RemoteCaching")]
-  [switch] $EnableRemoteCaching,
   [ValidateSet("debug", "release")]
   [string] $FoundationTestConfiguration = "debug",
-  [parameter(ParameterSetName = "LocalCaching")]
-  [string] $Cache = "",
   [switch] $Summary,
   [switch] $ToBatch
 )
@@ -1211,11 +1200,6 @@ function Build-CMakeProject {
       Invoke-VsDevShell $Platform
     }
 
-    if ($EnableCaching) {
-      $env:SCCACHE_DIRECT = "true"
-      $env:SCCACHE_DIR = "$(if ($Cache) { $Cache } else { "$BinaryCache\sccache" })"
-    }
-
     # Add additional defines (unless already present)
     $Defines = $Defines.Clone()
 
@@ -1298,14 +1282,14 @@ function Build-CMakeProject {
 
     if ($UseMSVCCompilers.Contains("C")) {
       Add-KeyValueIfNew $Defines CMAKE_C_COMPILER cl
-      if ($EnableCaching -or $EnableRemoteCaching) {
+      if ($EnableCaching) {
         Add-KeyValueIfNew $Defines CMAKE_C_COMPILER_LAUNCHER sccache
       }
       Add-FlagsDefine $Defines CMAKE_C_FLAGS $CFlags
     }
     if ($UseMSVCCompilers.Contains("CXX")) {
       Add-KeyValueIfNew $Defines CMAKE_CXX_COMPILER cl
-      if ($EnableCaching -or $EnableRemoteCaching) {
+      if ($EnableCaching) {
         Add-KeyValueIfNew $Defines CMAKE_CXX_COMPILER_LAUNCHER sccache
       }
       Add-FlagsDefine $Defines CMAKE_CXX_FLAGS $CXXFlags
@@ -3163,7 +3147,7 @@ if ($Clean) {
 }
 
 if (-not $SkipBuild) {
-  if ($EnableCaching -or $EnableRemoteCaching) -And (-Not (Test-SCCacheAtLeast -Major 0 -Minor 7 -Patch 4))) {
+  if ($EnableCaching -And (-Not (Test-SCCacheAtLeast -Major 0 -Minor 7 -Patch 4))) {
     throw "Minimum required sccache version is 0.7.4"
   }