Support for portable mpv installation

[maliayas]

Portable mpv installation uses portable_config folder in the root of mpv installation for storing personal data. This plugin might detect that and use that folder in order to store bookmarker.json. Thanks in advance.

[maliayas]

For future readers, this patch does the job:

diff --git a/bookmarker-menu.lua b/bookmarker-menu.lua
index 848d309..079ee05 100644
--- a/bookmarker-menu.lua
+++ b/bookmarker-menu.lua
@@ -31,6 +31,8 @@ local mode = "none"
 local bookmarkStore = {}
 local oldSlot = 0
 
+CONFIG_ROOT = utils.split_path(mp.find_config_file("."))
+
 -- // Controls \\ --
 
 -- List of custom controls and their function
@@ -262,11 +264,7 @@ end
 
 -- Get the filepath of a file from the mpv config folder
 function getFilepath(filename)
-  if isWindows() then
-  	return os.getenv("APPDATA"):gsub("\\", "/") .. "/mpv/" .. filename
-  else	
-	return os.getenv("HOME") .. "/.config/mpv/" .. filename
-  end
+  return CONFIG_ROOT .. filename
 end
 
 -- Load a table from a JSON file

[maddrog]

is there a way to force bookmarker json to be created in the portable folder? rather than the appdata folder