patch 9.2.0019: Hard to configure Vim according to full XDG spec

Commit: 
https://github.com/vim/vim/commit/4f04efb760af4f51975091ace7605c3dbd01d0c9
Author: Andrey Butirsky <[email protected]>
Date:   Wed Feb 18 21:14:24 2026 +0000

    patch 9.2.0019: Hard to configure Vim according to full XDG spec
    
    Problem:  Hard to configure Vim according to full XDG spec
    Solution: Include the $VIMRUNTIME/xdg.vim script as an example.
              (Andrey Butirsky).
    
    closes: #19421
    
    Co-authored-by: Christian Brabandt <[email protected]>
    Signed-off-by: Andrey Butirsky <[email protected]>
    Signed-off-by: Christian Brabandt <[email protected]>

diff --git a/runtime/doc/starting.txt b/runtime/doc/starting.txt
index 2c3968853..4d828a1c3 100644
--- a/runtime/doc/starting.txt
+++ b/runtime/doc/starting.txt
@@ -1,4 +1,4 @@
-*starting.txt* For Vim version 9.2.  Last change: 2026 Feb 16
+*starting.txt* For Vim version 9.2.  Last change: 2026 Feb 18
 
 
                  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -1125,8 +1125,13 @@ This is not an exhaustive list of those directories:
   `$XDG_DATA_HOME`     $HOME/.local/share      Persistent data files
   `$XDG_STATE_HOME`    $HOME/.local/state      State data files
 
-Vim will only use the `$XDG_CONFIG_HOME` directory, the others are not
-(yet) used for its various configuration and state files.
+                                                       *xdg.vim*
+Vim itself will only use the $XDG_CONFIG_HOME directory.  Support for the
+other XDG directories is provided by the "$VIMRUNTIME/xdg.vim" script.
+Note: xdg.vim is only effective if the $XDG_CONFIG_HOME/vim directory (or
+its default fallback) exists.  By default, it only sets the 'viminfofile'
+option.  Other option settings are commented out, see the script for
+details on how to enable them.
 
                                                        *xdg-vimrc*
 Vim, on Unix systems, will look at `$XDG_CONFIG_HOME/vim/vimrc` for its
diff --git a/runtime/doc/tags b/runtime/doc/tags
index 2c7d10766..2d3858b4d 100644
--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -11899,6 +11899,7 @@ xattr   editing.txt     /*xattr*
 xdg-base-dir   starting.txt    /*xdg-base-dir*
 xdg-runtime    starting.txt    /*xdg-runtime*
 xdg-vimrc      starting.txt    /*xdg-vimrc*
+xdg.vim        starting.txt    /*xdg.vim*
 xf86conf.vim   syntax.txt      /*xf86conf.vim*
 xfontset       mbyte.txt       /*xfontset*
 xfree-xterm    syntax.txt      /*xfree-xterm*
diff --git a/runtime/xdg.vim b/runtime/xdg.vim
new file mode 100644
index 000000000..254cb1248
--- /dev/null
+++ b/runtime/xdg.vim
@@ -0,0 +1,46 @@
+" XDG Base Directory support
+" This script sets up paths for XDG compliance.
+" Maintainer:  The Vim Project <https://github.com/vim/vim>
+" Last Change: 2026 Feb 18
+
+let s:config = empty($XDG_CONFIG_HOME) ? expand("~/.config") : 
expand("$XDG_CONFIG_HOME")
+let s:data   = empty($XDG_DATA_HOME)   ? expand("~/.local/share") : 
expand("$XDG_DATA_HOME")
+let s:state  = empty($XDG_STATE_HOME)  ? expand("~/.local/state") : 
expand("$XDG_STATE_HOME")
+
+if isdirectory(s:config .. '/vim')
+  func s:mkvimdir(dir)
+    if !isdirectory(a:dir)
+      call mkdir(a:dir, 'p', 0700)
+    endif
+    return a:dir
+  endfunc
+
+  " Use Data for packages, prevent duplicates
+  if index(split(&packpath, ','), s:data .. '/vim') == -1
+    exe $"set packpath^={s:data}/vim"
+    exe $"set packpath+={s:data}/vim/after"
+  endif
+
+  " Use Data for the viminfo file
+  let &viminfofile = s:mkvimdir(s:data .. '/vim') .. '/viminfo'
+
+  " These options are not set by default because they change the behavior of
+  " where files are saved. Uncomment them if you want to fully move all
+  " transient/persistent files to XDG directories.
+  " Note: Undo/Views/Spell are placed in DATA_HOME as they are persistent,
+  " while Swap/Backups use STATE_HOME as transient session state.
+
+  " Persistent Data:
+  " let &undodir = s:mkvimdir(s:data .. '/vim/undo') .. '//'
+  " let &viewdir = s:mkvimdir(s:data .. '/vim/view') .. '//'
+  " let g:netrw_home = s:mkvimdir(s:data .. '/vim')
+  " call s:mkvimdir(s:data .. '/vim/spell')
+
+  " Transient State:
+  " let &directory = s:mkvimdir(s:state .. '/vim/swap')   .. '//'
+  " let &backupdir = s:mkvimdir(s:state .. '/vim/backup') .. '//'
+
+  delfunction s:mkvimdir
+endif
+
+unlet s:config s:data s:state
diff --git a/src/Makefile b/src/Makefile
index c0b7db75f..99c77cb34 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -2400,6 +2400,9 @@ installrtbase: $(HELPSOURCE)/vim.1 $(DEST_VIM) 
$(VIMTARGET) $(DEST_RT) \
        chmod $(VIMSCRIPTMOD) $(DEST_SCRIPT)/vimrc_example.vim
        $(INSTALL_DATA) $(SCRIPTSOURCE)/gvimrc_example.vim $(DEST_SCRIPT)
        chmod $(VIMSCRIPTMOD) $(DEST_SCRIPT)/gvimrc_example.vim
+# install the xdg file
+       $(INSTALL_DATA) $(SCRIPTSOURCE)/xdg.vim $(DEST_SCRIPT)
+       chmod $(VIMSCRIPTMOD) $(DEST_SCRIPT)/xdg.vim
 # install the file type detection files
        $(INSTALL_DATA) $(SCRIPTSOURCE)/filetype.vim $(SYS_FILETYPE_FILE)
        chmod $(VIMSCRIPTMOD) $(SYS_FILETYPE_FILE)
diff --git a/src/version.c b/src/version.c
index 4f4155200..8fabd64ed 100644
--- a/src/version.c
+++ b/src/version.c
@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    19,
 /**/
     18,
 /**/

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