1 files changed, 64 insertions, 0 deletions
diff --git a/tools/libcheck.ps1 b/tools/libcheck.ps1
new file mode 100644
index 0000000..45a73aa
--- /dev/null
+++ b/tools/libcheck.ps1
@@ -0,0 +1,64 @@
+param(
+	$OldVersion,
+	$NewVersion,
+	$Configuration='Debug'
+)
+
+function Usage() {
+	$ScriptName = Split-Path -leaf $MyInvocation.ScriptName
+	Write-Host "$ScriptName -OldVersion <tag> -NewVersion <branch>"
+	exit
+}
+
+if ($Args -Contains "-?" -or !$OldVersion -or !$NewVersion -or ($OldVersion -eq $NewVersion)) {
+	Usage
+}
+
+function SetupVariables() {
+	$ToolsDir = Split-Path $MyInvocation.ScriptName
+	$RootDir = [io.path]::getfullpath((Join-Path $ToolsDir .. -resolve))
+	$BinDir = "$RootDir\bin"
+	$LibCheckTmpDir = Join-Path ([IO.Path]::GetTempPath()) "LibCheck"
+}
+
+function Checkout($Version) {
+	git checkout $Version
+}
+
+function Build() {
+	msbuild.exe "$RootDir\src\DotNetOpenId\DotNetOpenId.csproj" /p:Configuration=$Configuration
+}
+
+function Generate-Metadata($Version) {
+	Push-Location $LibCheckTmpDir
+	& ".\libcheck.exe" -store "DotNetOpenId.dll" $Version -full "$BinDir\$Configuration"
+	Pop-Location
+}
+
+function Compare-Metadata() {
+	Push-Location $LibCheckTmpDir
+	& ".\libcheck.exe" -compare $OldVersion $NewVersion
+	Pop-Location
+}
+
+function ShadowCopy-Libcheck() {
+	# This function copies LibCheck from the checked out version to a temp
+	# directory so that as we git checkout other versions of DotNetOpenId,
+	# we can be sure of running one consistent version of LibCheck.
+	Remove-Item -Recurse $LibCheckTmpDir
+	Copy-Item -Recurse "$ToolsDir\LibCheck" (Split-Path $LibCheckTmpDir)
+	# As a side benefit, this also puts the results of running LibCheck
+	# outside the git repo so it can't get checked in accidentally.
+}
+
+. SetupVariables
+ShadowCopy-Libcheck
+Checkout -version $OldVersion
+Build
+Generate-Metadata -version $OldVersion
+Checkout -version $NewVersion
+Build
+Generate-Metadata -version $NewVersion
+Compare-Metadata
+Pop-Location
+& "$LibCheckTmpDir\$($OldVersion)to$($NewVersion)\APIChanges$($OldVersion)to$($NewVersion).html"