Support multiple EngineVersions

doc/PluginPackage.md

@@ -32,9 +32,33 @@ in the root of your plugin, next to the .uplugin file. The options are:
 ```json
 {
     "OutputDir": "C:\\Users\\Steve\\MarketplaceBuilds",
-    "PluginFile": "OptionalPluginFilenameWillDetectInDirOtherwise.uplugin"
+    "PluginFile": "OptionalPluginFilenameWillDetectInDirOtherwise.uplugin",
+    "EngineVersions":
+    [
+        "5.0.0",
+        "5.1.0",
+        "5.2.0"
+    ]    
 }
 
+`OutputDir` and `EngineVersions` are required.
+
+## Engine Versions
+
+When submitting code plugins to the Marketplace, you're only allowed to include
+a single supported `EngineVersion` in each version you upload. Even though you 
+don't submit built binaries to the Marketplace, the publisher portal requires
+that the .uplugin has a single `EngineVersion` entry.
+
+Therefore to support multiple engine versions, you have to upload several essentially
+identical source archives, with each one having a different `EngineVersion` specified
+in the .uplugin.
+
+This script helps you do that; for each entry in `EngineVersions` in the `pluginconfig.json`,
+a separate zip archive is generated, with the correct version set in the .uplugin.
+
+> It seems you should always use ".0" as the 3rd version digit.
+
 ## Excluding Files
 
 By default, the plugin packaging process automatically excludes common

inc/pluginconfig.ps1

@@ -2,6 +2,8 @@
 
 class PluginConfig {
     [string]$OutputDir
+    [string]$PluginFile
+    [array]$EngineVersions
 
     PluginConfig([PSCustomObject]$obj) {
         # Construct from JSON object

pluginconfig_template.json

@@ -1,7 +1,14 @@
 {
     "OutputDir": "/Path/To/Output/Parent/Dir",
 
-    "PluginFile": "OptionalPluginFilenameWillDetectInDirOtherwise.uplugin"
+    "PluginFile": "OptionalPluginFilenameWillDetectInDirOtherwise.uplugin",
+
+    "EngineVersions":
+    [
+        "5.0",
+        "5.1",
+        "5.2"
+    ]
 
 }
 

ue-plugin-package.ps1

@@ -124,11 +124,18 @@ try {
     }
     $proj = Read-Uproject $pluginfile
     $pluginName = (Get-Item $pluginfile).Basename
-    $saveuplugin = $false
+
+    # Default to latest engine if not specified
+    if (-not $config.EngineVersions -or $config.EngineVersions.Length -eq 0) {
+        Write-Output "Warning: EngineVersions missing from pluginconfig.json, assuming latest only"
+        $config.EngineVersions = [System.Collections.ArrayList]@()
+        $config.EngineVersions.add($proj.EngineVersion) > $null
+    }
 
     Write-Output ""
     Write-Output "Plugin File     : $pluginfile"
     Write-Output "Output Folder   : $($config.OutputDir)"
+    Write-Output "Engine Versions : $($config.EngineVersions -join ", ")"
     Write-Output ""
 
     if (([bool]$major + [bool]$minor + [bool]$patch + [bool]$hotfix) -eq 0) {
@@ -141,7 +148,6 @@ try {
             $versionNumber = Get-NextPluginVersion -current:$versionNumber -major:$major -minor:$minor -patch:$patch -hotfix:$hotfix
             # Save incremented version back to uplugin object (will be saved later)
             $proj.VersionName = $versionNumber
-            $saveuplugin = $true
         }
         catch {
             Write-Output $_.Exception.Message
@@ -169,29 +175,25 @@ try {
     if (-not $proj.Installed) {
         # Need to set the installed=true for marketplace
         $proj.Installed = $true
-        $saveuplugin = $true
         $resetinstalled = $true
     }
 
+    # Marketplace requires you to submit one package per EngineVersion for code plugins
+    # Pretty dumb since the only diff is the EngineVersion in .uplugin but sure
+    $oldEngineVer = $proj.EngineVersion
+    foreach ($EngineVer in $config.EngineVersions) {
+        Write-Output "Packaging for Engine Version $EngineVer"
+        $proj.EngineVersion = $EngineVer
 
-    if ($saveuplugin) {
         $newjson = ($proj | ConvertTo-Json -depth 100)
-        if ($dryrun) {
-            Write-Output ""
-            Write-Output "Would have updated .uproject to:"
-            Write-Output $newjson
-            Write-Output ""
-    
-        } else {
+        if (-not $dryrun) {
             Write-Output "Writing updates to .uproject"
             $newjson | Out-File $pluginfile
         }
 
-    }
-
         # Zip parent of the uplugin folder
         $zipsrc = (Get-Item $pluginfile).Directory.FullName
-    $zipdst = Join-Path $config.OutputDir "$($pluginName)_$($versionNumber).zip"
+        $zipdst = Join-Path $config.OutputDir "$($pluginName)_v$($versionNumber)_UE$($EngineVer).zip"
         $excludefilename = "packageexclusions.txt"
         $excludefile = Join-Path $zipsrc $excludefilename
 
@@ -230,25 +232,22 @@ try {
 
         }
 
-    # Reset the installed flag back to how it was, for convenience 
+    }
+
+
+    # Reset the uplugin
     # Otherwise UE keeps prompting to update project files when using it as source
     if ($resetinstalled) {
         $proj.Installed = $false
-        $newjson = ($proj | ConvertTo-Json -depth 100)
-        if ($dryrun) {
-            Write-Output ""
-            Write-Output "Would have updated .uproject to:"
-            Write-Output $newjson
-            Write-Output ""
+    }
+    $proj.EngineVersion = $oldEngineVer
 
-        } else {
-            Write-Output "Writing updates to .uproject"
+    if (-not $dryrun) {
+        $newjson = ($proj | ConvertTo-Json -depth 100)
+        Write-Output "Resetting .uproject"
         $newjson | Out-File $pluginfile
     }
 
-    }
-
-
 
     if ($browse -and -not $dryrun) {
         Invoke-Item $config.OutputDir