vim-patch:7.4.1161

Problem:    ":argadd" without argument is supposed to add the current buffer
            name to the arglist.
Solution:   Make it work as documented. (Coot, closes vim/vim#577)

https://github.com/vim/vim/commit/2faa29f896252073b53f387406109e331fbbe5f8

4 files changed, 22 insertions, 5 deletions

diff --git a/src/nvim/ex_cmds.lua b/src/nvim/ex_cmds.lua
index 04fd88cc8d..6c58879d58 100644
--- a/src/nvim/ex_cmds.lua
+++ b/src/nvim/ex_cmds.lua
@@ -88,7 +88,7 @@ return {
   },
   {
     command='argadd',
-    flags=bit.bor(BANG, NEEDARG, RANGE, NOTADR, ZEROR, FILES, TRLBAR),
+    flags=bit.bor(BANG, RANGE, NOTADR, ZEROR, FILES, TRLBAR),
     addr_type=ADDR_ARGUMENTS,
     func='ex_argadd',
   },
diff --git a/src/nvim/ex_cmds2.c b/src/nvim/ex_cmds2.c
index b6d0ef78cf..fd299eaa8a 100644
--- a/src/nvim/ex_cmds2.c
+++ b/src/nvim/ex_cmds2.c
@@ -1487,9 +1487,15 @@ do_arglist (
   char_u      *p;
   int match;
 
-  /*
-   * Collect all file name arguments in "new_ga".
-   */
+  // Set default argument for ":argadd" command.
+  if (what == AL_ADD && *str == NUL) {
+    if (curbuf->b_ffname == NULL) {
+      return FAIL;
+    }
+    str = curbuf->b_fname;
+  }
+
+  // Collect all file name arguments in "new_ga".
   get_arglist(&new_ga, str);
 
   if (what == AL_DEL) {
diff --git a/src/nvim/version.c b/src/nvim/version.c
index 09f6ef6301..da90bc588f 100644
--- a/src/nvim/version.c
+++ b/src/nvim/version.c
@@ -521,7 +521,7 @@ static int included_patches[] = {
   1164,
   1163,
   // 1162 NA
-  // 1161,
+  1161,
   1160,
   // 1159 NA
   // 1158 NA
diff --git a/test/functional/legacy/arglist_spec.lua b/test/functional/legacy/arglist_spec.lua
index 60485e8902..d2e3e511d2 100644
--- a/test/functional/legacy/arglist_spec.lua
+++ b/test/functional/legacy/arglist_spec.lua
@@ -84,6 +84,17 @@ describe('argument list commands', function()
     execute('+2argadd y')
     assert_argc({'a', 'b', 'c', 'x', 'y'})
     eq(1, eval('argidx()'))
+
+    execute('%argd')
+    execute('edit d')
+    execute('arga')
+    eq(1, eval('len(argv())'))
+    eq('d', eval('get(argv(), 0, "")'))
+
+    execute('%argd')
+    execute('new')
+    execute('arga')
+    eq(0, eval('len(argv())'))
   end)
 
   it('test for [count]argument and [count]argdelete commands', function()