xplat installer

autoload/coc/pses.vim

@@ -0,0 +1,12 @@
+let s:root           = expand('<sfile>:h:h:h')
+let s:is_win         = has('win32') || has('win64')
+let s:is_vim         = !has('nvim')
+let s:install_script = s:root.'/'.(s:is_win ? 'install.cmd' : 'install.ps1')
+
+function! coc#pses#install()
+    let cwd = getcwd()
+    exe 'lcd '.s:root
+    exe '!'.s:install_script
+    exe 'lcd '.cwd
+endfunction
+

plugin/coc-pses.vim

@@ -35,10 +35,6 @@ function! s:PSESSetup ()
             \)
 endfunction
 
-function! coc#pses#install()
-    execute "!../install.ps1"
-endfunction
-
 " Set the file type to ps1 for ps1, psm1, and psd1
 " 'ps1' is what vim-polyglot uses for styling
 if(&filetype == "")