fix(lib): add convenience param to get last part of session name

Mainly useful for Lualine

README.md

@@ -438,7 +438,13 @@ require('lualine').setup{
   options = {
     theme = 'tokyonight',
   },
-  sections = {lualine_c = {require('auto-session.lib').current_session_name}}
+  sections = {
+    lualine_c = {
+      function()
+        return require('auto-session.lib').current_session_name(true)
+      end
+    }
+  }
 }
 ```
 

lua/auto-session/lib.lua

@@ -21,11 +21,19 @@ end
 ---Returns the current session name. For an automatically generated session name, it
 ---will just be the same as vim.fn.getcwd(). For a named session, it will be the name
 ---without .vim
+---@param tail_only? boolean Only return the last part of a path based session name
 ---@return string The current session name
-function Lib.current_session_name()
+function Lib.current_session_name(tail_only)
+  tail_only = tail_only or false
   -- get the filename without the extension
   local file_name = vim.fn.fnamemodify(vim.v.this_session, ":t:r")
-  return Lib.get_session_display_name(file_name)
+  local session_name = Lib.get_session_display_name(file_name)
+
+  if not tail_only then
+    return session_name
+  end
+
+  return vim.fn.fnamemodify(session_name, ":t")
 end
 
 function Lib.is_empty_table(t)

tests/cmds_spec.lua

@@ -80,6 +80,7 @@ describe("The default config", function()
     assert.equals(1, vim.fn.bufexists(TL.test_file))
 
     assert.equals(TL.named_session_name, require("auto-session").Lib.current_session_name())
+    assert.equals(TL.named_session_name, require("auto-session").Lib.current_session_name(true))
   end)
 
   it("can complete session names", function()
@@ -156,6 +157,7 @@ describe("The default config", function()
     assert.equals(1, vim.fn.bufexists(TL.test_file))
 
     assert.equals(vim.fn.getcwd(), require("auto-session.lib").current_session_name())
+    assert.equals(vim.fn.fnamemodify(vim.fn.getcwd(), ":t"), require("auto-session.lib").current_session_name(true))
   end)
 
   it("can purge old sessions", function()