Move git check for changes to script

eng/common/pipelines/templates/steps/git-push-changes.yml

@@ -10,25 +10,14 @@ parameters:
   SkipCheckingForChanges: false
 
 steps:
-- pwsh: |
-    echo "git add -A"
-    git add -A
-
-    echo "git diff --name-status --cached --exit-code"
-    git diff --name-status --cached --exit-code
-
-    if ($LastExitCode -ne 0) {
-      echo "##vso[task.setvariable variable=HasChanges]$true"
-      echo "Changes detected so setting HasChanges=true"
-    }
-    else {
-      echo "##vso[task.setvariable variable=HasChanges]$false"
-      echo "No changes so skipping code push"
-    }
+- task: PowerShell@2
   displayName: Check for changes
   condition: and(succeeded(), eq(${{ parameters.SkipCheckingForChanges }}, false))
-  workingDirectory: ${{ parameters.WorkingDirectory }}
-  ignoreLASTEXITCODE: true
+  inputs:
+    pwsh: true
+    workingDirectory: ${{ parameters.WorkingDirectory }}
+    filePath: ${{ parameters.ScriptDirectory }}/check-for-git-changes.ps1
+    ignoreLASTEXITCODE: true
 
 - pwsh: |
     # Remove the repo owner from the front of the repo name if it exists there

eng/common/scripts/check-for-git-changes.ps1

@@ -0,0 +1,14 @@
+echo "git add -A"
+git add -A
+
+echo "git diff --name-status --cached --exit-code"
+git diff --name-status --cached --exit-code
+
+if ($LastExitCode -ne 0) {
+  echo "##vso[task.setvariable variable=HasChanges]$true"
+  echo "Changes detected so setting HasChanges=true"
+}
+else {
+  echo "##vso[task.setvariable variable=HasChanges]$false"
+  echo "No changes so skipping code push"
+}