Add powershell support, closes #40

syntax/ps1xml.vim

@@ -0,0 +1,56 @@
+" Vim syntax file
+" Language:           Windows PowerShell XML
+" Maintainer:         Peter Provost <peter@provost.org>
+" Version:            2.10
+" Project Repository: https://github.com/PProvost/vim-ps1
+" Vim Script Page:    http://www.vim.org/scripts/script.php?script_id=1327"
+
+" Compatible VIM syntax file start
+if version < 600
+  syntax clear
+elseif exists("b:current_syntax")
+  finish
+endif
+
+let s:ps1xml_cpo_save = &cpo
+set cpo&vim
+
+doau syntax xml
+unlet b:current_syntax
+
+syn case ignore
+syn include @ps1xmlScriptBlock <sfile>:p:h/ps1.vim
+unlet b:current_syntax
+
+syn region ps1xmlScriptBlock
+      \ matchgroup=xmlTag     start="<Script>"
+      \ matchgroup=xmlEndTag  end="</Script>"
+      \ fold
+      \ contains=@ps1xmlScriptBlock
+      \ keepend
+syn region ps1xmlScriptBlock
+      \ matchgroup=xmlTag     start="<ScriptBlock>"
+      \ matchgroup=xmlEndTag  end="</ScriptBlock>"
+      \ fold
+      \ contains=@ps1xmlScriptBlock
+      \ keepend
+syn region ps1xmlScriptBlock
+      \ matchgroup=xmlTag     start="<GetScriptBlock>"
+      \ matchgroup=xmlEndTag  end="</GetScriptBlock>"
+      \ fold
+      \ contains=@ps1xmlScriptBlock
+      \ keepend
+syn region ps1xmlScriptBlock
+      \ matchgroup=xmlTag     start="<SetScriptBlock>"
+      \ matchgroup=xmlEndTag  end="</SetScriptBlock>"
+      \ fold
+      \ contains=@ps1xmlScriptBlock
+      \ keepend
+
+syn cluster xmlRegionHook add=ps1xmlScriptBlock
+
+let b:current_syntax = "ps1xml"
+
+let &cpo = s:ps1xml_cpo_save
+unlet s:ps1xml_cpo_save
+