Allow building and installing fluent-plugin-google-cloud from an arbi…

…trary branch on Windows. (#348)

windows-installer/generate_sdl_agent_exe.ps1

@@ -13,7 +13,10 @@
 #  ARGUMENTS
 ##############################
 
-Param([string]$version = (Get-Content "$PSScriptRoot\..\windows-installer\VERSION"))
+Param(
+  [string]$version = (Get-Content "$PSScriptRoot\..\windows-installer\VERSION"),
+  [string]$localOutputGemDir
+)
 
 ##############################
 #  TRACING AND ERROR HANDLING
@@ -28,6 +31,8 @@ $ErrorActionPreference = 'Stop'
 
 # Just install into current directory for simplicity.
 $BASE_INSTALLER_DIR = [string](Get-Location)
+# Re-enable tracing.
+Set-PSDebug -Trace 1
 
 # The path of where ruby and all gems will be.  This is the portion that will be
 # packaged and zipped up.
@@ -111,6 +116,8 @@ $ProgressPreference = "silentlyContinue"
 Invoke-WebRequest "$RUBY_INSTALLER_LINK" -OutFile "$RUBY_INSTALLER" -UserAgent "curl/7.60.0"
 Invoke-WebRequest "$NSIS_INSTALLER_LINK" -OutFile "$NSIS_INSTALLER" -UserAgent "curl/7.60.0"
 Invoke-WebRequest "$NSIS_UNZU_INSTALLER_LINK" -OutFile "$NSIS_UNZU_ZIP" -UserAgent "curl/7.60.0"
+# Re-enable tracing.
+Set-PSDebug -Trace 1
 
 
 ##############################
@@ -157,6 +164,15 @@ $plugin_gems_rb = $SRC_ROOT + '\plugin_gems.rb'
 & $RUBY_EXE $gem_installer $core_gems_rb
 & $RUBY_EXE $gem_installer $plugin_gems_rb
 
+
+if ($localOutputGemDir -ne $null) {
+  Push-Location $localOutputGemDir
+  Get-ChildItem
+  & $GEM_CMD build fluent-plugin-google-cloud.gemspec
+  & $GEM_CMD install fluent-plugin-google-cloud*.gem --no-document
+  Pop-Location
+}
+
 ##############################
 #  STEP 4.1 - TEMPORARY HACK TO UPDATE RUBY FILE
 ##############################