Create symlink to import plugins to Unity project

playmaker.json

{
  "name": "PlayMaker",
  "toSymlink": [
    {
      "name": "PlayMaker",
      "to": "Standard Assets/PlayMaker"
    },
    {
      "name": "Gizmos/PlayMakerFSM Icon.tiff",
      "to": "Gizmos/PlayMakerFSM Icon.tiff"
    },
    {
      "name": "Gizmos/PlayMakerGlobals Icon.tiff",
      "to": "Gizmos/PlayMakerGlobals Icon.tiff"
    },
    {
      "name": "Gizmos/PlayMakerGUI Icon.tiff",
      "to": "Gizmos/PlayMakerGUI Icon.tiff"
    },
    {
      "name": "Gizmos/PlaymakerIcon.tiff",
      "to": "Gizmos/PlaymakerIcon.tiff"
    },
    {
      "name": "Gizmos/PlayMakerPrefs Icon.tiff",
      "to": "Gizmos/PlayMakerPrefs Icon.tiff"
    },
    {
      "name": "Plugins/PlayMaker",
      "to": "Plugins/PlayMaker"
    }    
  ]
}

set-in-references.ps1

#Requires -Version 2.0

$currentPath = (Get-Item -Path ".\" -Verbose).FullName

$referencedSettingsBase = Join-Path -Path $currentPath -ChildPath "referenced-settings"
$inReferencesBase = Join-Path -Path $currentPath -ChildPath "in-references"
$unityAssetsBase = Join-Path -Path $currentPath -ChildPath "Assets"

$gizmosDirectory = Join-Path -Path $unityAssetsBase -ChildPath "Gizmos"
$pluginDirectory = Join-Path -Path $unityAssetsBase -ChildPath "Plugins"
$pluginEditorDirectory = Join-Path -Path $pluginDirectory -ChildPath "Editor"
$standardAssetsDirectory = Join-Path -Path $unityAssetsBase -ChildPath "Standard Assets"
$standardAssetsEditorDirectory = Join-Path -Path $standardAssetsDirectory -ChildPath "Editor"

# $unityAssetsBase

function Create-Directory ()
{
  New-Item -ItemType Directory -Force -Path $gizmosDirectory  
  New-Item -ItemType Directory -Force -Path $pluginDirectory  
  New-Item -ItemType Directory -Force -Path $pluginEditorDirectory 
  New-Item -ItemType Directory -Force -Path $standardAssetsDirectory 
  New-Item -ItemType Directory -Force -Path $standardAssetsEditorDirectory 
  
  return 0
}

# Create-Directory

function Symlink-InReferences ()
{
  $files = @(Get-ChildItem "$referencedSettingsBase\*.json")
  foreach ($file in $files) {
    $setting = (Get-Content $file) | ConvertFrom-Json
  
    $sourceBase = Join-Path -Path $inReferencesBase -ChildPath $setting.name
  
    foreach ($symlinkItem in $setting.toSymlink) {
      $name = $symlinkItem.name
      $toLocation = $symlinkItem.to
  
      $sourceLocation = Join-Path -Path $sourceBase -ChildPath $name
      $sourceMetaLocation = Join-Path -Path $sourceBase -ChildPath "$name.meta"
      $targetLocation = Join-Path -Path $unityAssetsBase -ChildPath $toLocation
      $targetMetaLocation = Join-Path -Path $unityAssetsBase -ChildPath "$toLocation.meta"

      # Remove symlinked file/folder
      $targetLocationFile = Get-Item $targetLocation -Force -ea SilentlyContinue
      if ([bool]($targetLocationFile.Attributes -band [IO.FileAttributes]::ReparsePoint)) {
        Remove-Item $targetLocation
      } else {
        $showText = "It is not symlink"
        $showText
      }

      # Remove meta file
      $targetMetaLocationFile = Get-Item $targetMetaLocation -Force -ea SilentlyContinue
      if (Test-Path $targetMetaLocation) {
        Remove-Item $targetMetaLocation        
      }
      
      # Symlink file/folder if there is any
      if (Test-Path $sourceLocation) {
        New-Item -ItemType SymbolicLink -Path $targetLocation -Value $sourceLocation
      }
      # Symlink meta file if there is any 
      if (Test-Path $sourceMetaLocation) {
        New-Item -ItemType SymbolicLink -Path $targetMetaLocation -Value $sourceMetaLocation        
      }
    }
  }
  
  return 0
}

# Create folder first then create symlink
Create-Directory
Symlink-InReferences