feat: stdpath('run'), /tmp/nvim.user/ #18993

Problem:
- Since c57f6b28d71d #8519, sockets are created in ~/.local/… but XDG
  spec says: "XDG_RUNTIME_DIR: Must be on the local filesystem", which
  implies that XDG_STATE_DIR is potentially non-local.
- Not easy to inspect Nvim-created temp files (for debugging etc).

Solution:
- Store sockets in stdpath('run') ($XDG_RUNTIME_DIR).
- Establish "/tmp/nvim.user/" as the tempdir root shared by all Nvims.
- Make ok() actually useful.
- Introduce assert_nolog().

closes #3517
closes #17093

1 files changed, 7 insertions, 1 deletions

diff --git a/test/functional/options/defaults_spec.lua b/test/functional/options/defaults_spec.lua
index 92873e9937..9244ca0974 100644
--- a/test/functional/options/defaults_spec.lua
+++ b/test/functional/options/defaults_spec.lua
@@ -9,6 +9,7 @@ local clear = helpers.clear
 local exc_exec = helpers.exc_exec
 local eval = helpers.eval
 local eq = helpers.eq
+local ok = helpers.ok
 local funcs = helpers.funcs
 local insert = helpers.insert
 local iswin = helpers.iswin
@@ -238,7 +239,7 @@ describe('startup defaults', function()
   end)
 end)
 
-describe('XDG-based defaults', function()
+describe('XDG defaults', function()
   -- Need separate describe() blocks to not run clear() twice.
   -- Do not put before_each() here for the same reasons.
 
@@ -282,6 +283,7 @@ describe('XDG-based defaults', function()
       eq('.', meths.get_option('viewdir'))
       eq('.', meths.get_option('directory'))
       eq('.', meths.get_option('undodir'))
+      ok((funcs.tempname()):len() > 4)
     end)
   end)
 
@@ -306,6 +308,7 @@ describe('XDG-based defaults', function()
                          .. env_sep.. root_path .. ('/b'):rep(2048)
                          .. (env_sep .. root_path .. '/c'):rep(512)),
         XDG_DATA_HOME=(root_path .. ('/X'):rep(4096)),
+        XDG_RUNTIME_DIR=(root_path .. ('/X'):rep(4096)),
         XDG_STATE_HOME=(root_path .. ('/X'):rep(4096)),
         XDG_DATA_DIRS=(root_path .. ('/A'):rep(2048)
                        .. env_sep .. root_path .. ('/B'):rep(2048)
@@ -376,6 +379,7 @@ describe('XDG-based defaults', function()
         XDG_CONFIG_HOME='$XDG_DATA_HOME',
         XDG_CONFIG_DIRS='$XDG_DATA_DIRS',
         XDG_DATA_HOME='$XDG_CONFIG_HOME',
+        XDG_RUNTIME_DIR='$XDG_RUNTIME_DIR',
         XDG_STATE_HOME='$XDG_CONFIG_HOME',
         XDG_DATA_DIRS='$XDG_CONFIG_DIRS',
       }})
@@ -438,6 +442,7 @@ describe('XDG-based defaults', function()
           meths.get_option('undodir'):gsub('\\', '/'))
       eq(('$XDG_CONFIG_HOME/' .. state_dir .. '/view//'),
           meths.get_option('viewdir'):gsub('\\', '/'))
+      eq(nil, (funcs.tempname()):match('XDG_RUNTIME_DIR'))
     end)
   end)
 
@@ -519,6 +524,7 @@ describe('stdpath()', function()
     eq(statedir, funcs.fnamemodify(funcs.stdpath('state'), ':t'))
     eq('table', type(funcs.stdpath('config_dirs')))
     eq('table', type(funcs.stdpath('data_dirs')))
+    eq('string', type(funcs.stdpath('run')))
     assert_alive()  -- Check for crash. #8393
   end)