msi: add migration batch sequence

After:

* Move configuration files to c:\opt\fluent\etc\fluent\td-agent.conf
* Create symbolic link to c:\opt\fluent\etc\fluent.

Signed-off-by: Kentaro Hayashi <hayashi@clear-code.com>
Co-authored-by: Daijiro Fukuda <fukuda@clear-code.com>

fluent-package/Rakefile

@@ -546,6 +546,7 @@ class BuildTask
         ensure_directory(staging_bindir)
         cp("msi/assets/#{PACKAGE_NAME}-prompt.bat", td_agent_staging_dir)
         cp("msi/assets/#{PACKAGE_NAME}-post-install.bat", staging_bindir)
+        cp("msi/assets/#{PACKAGE_NAME}-post-migration.bat", staging_bindir)
         cp("msi/assets/#{SERVICE_NAME}.bat", td_agent_staging_dir)
         cp("msi/assets/fluent-gem.bat", td_agent_staging_dir)
         cp("msi/assets/#{PACKAGE_NAME}-version.rb", staging_bindir)

fluent-package/msi/assets/fluent-package-post-migration.bat

@@ -0,0 +1,51 @@
+@echo on
+title Fluent-package post migration script
+
+if exist "%~dp0..\..\td-agent" (
+  setlocal enabledelayedexpansion
+  sc query state=inactive | findstr fluentdwinsvc
+  if !ERRORLEVEL! == 1 (
+    @rem NOTE: If the service is not stopped here, it is a BUG.
+    @rem This state can cause fatal problems with the installation, so we should cancel this process.
+    @rem (If trying to stop it by the command such as `$ net stop fluentdwinsvc`, it can fail as "The service is starting or stopping.  Please try again later.".)
+    echo "WARN: Active fluentdwinsvc service is detected. This is unexpected. Migration process has been canceled."
+    exit /b 1
+  )
+  endlocal
+
+  if not exist "%~dp0..\etc\fluent" (
+    echo "Create c:\opt\fluent\etc\fluent directory"
+    mkdir "%~dp0..\etc\fluent"
+  )
+
+  if exist "%~dp0..\..\td-agent\etc\td-agent\td-agent.conf" (
+    echo "Migrate c:\opt\td-agent\etc\td-agent.conf"
+    move /Y "%~dp0..\..\td-agent\etc\td-agent\td-agent.conf" "%~dp0..\etc\fluent\td-agent.conf"
+    echo "Migrate td-agent.conf to c:\opt\fluent\etc\fluent\fluentd.conf"
+    copy /Y "%~dp0..\etc\fluent\td-agent.conf" "%~dp0..\etc\fluent\fluentd.conf"
+  )
+
+  @rem NOTE: do not migrate log files not to lose log accidentally
+
+  echo "Migrate c:\opt\td-agent\etc\td-agent\* files"
+  for %%f in (%~dp0..\..\td-agent\etc\td-agent\*) do (
+    move /Y %%f "%~dp0..\etc\fluent\"
+  )
+  if not exist "%~dp0..\etc\fluent\plugin" (
+    mkdir "%~dp0..\etc\fluent\plugin"
+  )
+  echo "Migrate c:\opt\td-agent\etc\plugin directory"
+  for /d %%d in (%~dp0..\..\td-agent\etc\plugin\*) do (
+    move /Y %%d "%~dp0..\etc\fluent\plugin\"
+  )
+
+  echo "Ensure remaining files under td-agent"
+  tree %~dp0..\..\td-agent
+
+  @rem create symbolic link to c:\opt\fluent (we can't use hardlink for directory)
+  if exist "%~dp0..\..\td-agent\etc\td-agent" (
+    rmdir /S /Q "%~dp0..\..\td-agent\etc\td-agent"
+  )
+  echo "Create symlink c:\opt\td-agent\etc\td-agent to c:\opt\fluent\etc\fluent"
+  mklink /D %~dp0..\..\td-agent\etc\td-agent %~dp0..\..\fluent\etc\fluent
+)

fluent-package/msi/source.wxs

@@ -163,6 +163,18 @@
                   Execute="deferred"
                   Return="check"
                   Impersonate="no" />
+
+    <Property Id="PostMigration" Value=" "/>
+    <CustomAction Id="SetPostMigrationCommand"
+                  Property="PostMigration"
+                  Value="&quot;[FLUENTPROJECTLOCATION]bin\fluent-package-post-migration.bat&quot;"/>
+    <CustomAction Id="PostMigration"
+                  BinaryKey="WixCA"
+                  DllEntry="WixQuietExec64"
+                  Execute="deferred"
+                  Return="check"
+                  Impersonate="no" />
+
     <Property Id="InstallFluentdWinSvc" Value=" "/>
     <CustomAction Id="SetInstallFluentdWinSvcCommand"
                   Property="InstallFluentdWinSvc"
@@ -219,6 +231,10 @@
     <InstallExecuteSequence>
       <Custom Action="SetPostInstallCommand" After="InstallFiles">NOT Installed</Custom>
       <Custom Action="PostInstall" After="SetPostInstallCommand">NOT Installed</Custom>
+
+      <Custom Action="SetPostMigrationCommand" Before="PostMigration">WIX_UPGRADE_DETECTED</Custom>
+      <Custom Action="PostMigration" Before="StartServices">WIX_UPGRADE_DETECTED</Custom>
+
       <Custom Action="SetInstallFluentdWinSvcCommand" After="InstallFiles">NOT Installed</Custom>
       <Custom Action="InstallFluentdWinSvc" After="SetInstallFluentdWinSvcCommand">NOT Installed</Custom>