Update Tools repo Sync to make use of patch files

[chidozieononiwu]

For pull request triggered runs of the sync pipeline. Rather that copying over all the files in the Sync directory make use of a patch file to apply only the changes associated with the latest commits.

[chidozieononiwu]

/azp run azure-sdk-tools - sync - eng-common

[azure-pipelines]

Azure Pipelines could not run because the pipeline triggers exclude this branch/path.

[weshaggard]

Shouldn't you still check the lastExitCode after each invoke of git am?

[weshaggard]

(Get-ChildItem $(PatchFilesLocation)) that doesn't return a count does it?

[weshaggard]

Suggested change

	foreach ($file in (Get-ChildItem $(PatchFilesLocation)))
	{
	$results += git -c user.name="azure-sdk" -c user.email="azuresdk@microsoft.com" am $file.FullName
	}
	$shaBeforePatches = git ref-parse --short HEAD
	foreach ($file in (Get-ChildItem $(PatchFilesLocation)*.patch))
	{
	git -c user.name="azure-sdk" -c user.email="azuresdk@microsoft.com" am -3 $file.FullName
	if ($lastExitCode -ne 0) {
	git am --show-current-patch=diff
	# Once we hit one conflict that causes the patch to fail we should fail the pipeline until that
	# gets addressed.
	Write-Error "##vso[task.LogIssue type=warning;]Failed to properly apply patch files to [https://github.com/azure/${{ repo }}]"
	exit 1
	}
	}
	$shaAfterPatches = git ref-parse --short HEAD
	$hasChanges = $shaBeforePatches -ne $shaAfterPatches
	echo "##vso[task.setvariable variable=HasChanges]$hasChanges"

[chidozieononiwu]

Am closing this since the changes have been incorporated in #1052

[weshaggard]

@chidozieononiwu please also go and close the sync PRs.