Merge pull request #225 from microsoft/cleanup-upgrade-downgrade-story-2

PS: Cleanup upgrade/downgrade chains

Author: dilanbhalla

.gitattributes

@@ -88,3 +88,8 @@
 # swift prebuilt resources
 /swift/third_party/resources/*.zip filter=lfs diff=lfs merge=lfs -text
 /swift/third_party/resources/*.tar.zst filter=lfs diff=lfs merge=lfs -text
+
+# This upgrade script must use windows line-endings to be compatible with old
+# databases.
+/powershell/ql/lib/upgrades/ce269c61feda10a8ca0d16519085f7e55741a694/old.dbscheme eol=crlf
+/powershell/downgrades/802d5b9f407fb0dac894df1c0b4584f2215e1512/semmlecode.powershell.dbscheme eol=crlf

powershell/build.ps1

@@ -11,6 +11,7 @@ if ($LASTEXITCODE -ne 0) {
 
 $powershellFolder = Join-Path -Path $cliFolder -ChildPath "powershell"
 Copy-Item -Path "$PSScriptRoot/codeql-extractor.yml" -Destination $powershellFolder -Force
+Copy-Item -Path "$PSScriptRoot/downgrades" -Destination $powershellFolder -Recurse -Force
 $qlLibFolder = Join-Path -Path "$PSScriptRoot/ql" -ChildPath "lib"
 Copy-Item -Path (Join-Path $qlLibFolder "semmlecode.powershell.dbscheme") -Destination $powershellFolder -Force
 Copy-Item -Path (Join-Path $qlLibFolder "semmlecode.powershell.dbscheme.stats") -Destination $powershellFolder -Force