vim-patch:9.1.1605: cannot specify scope for chdir() (#35239)

Problem:  Cannot specify scope for chdir()
Solution: Add optional scope argument (kuuote)

closes: vim/vim#17888

8a65a49d50

Co-authored-by: kuuote <znmxodq1@gmail.com>

runtime/doc/news.txt

@@ -302,6 +302,7 @@ UI
 
 VIMSCRIPT
 
+• |chdir()| allows optionally specifying a scope argument.
 • |cmdcomplete_info()| gets current cmdline completion info.
 • |getcompletiontype()| gets command-line completion type for any string.
 • |prompt_getinput()| gets current user-input in prompt-buffer.

runtime/doc/vimfn.txt

@@ -1008,16 +1008,23 @@ charidx({string}, {idx} [, {countcc} [, {utf16}]])                   *charidx()*
                 Return: ~
                   (`integer`)
 
-chdir({dir})                                                           *chdir()*
-		Change the current working directory to {dir}.  The scope of
-		the directory change depends on the directory of the current
-		window:
-			- If the current window has a window-local directory
-			  (|:lcd|), then changes the window local directory.
-			- Otherwise, if the current tabpage has a local
-			  directory (|:tcd|) then changes the tabpage local
-			  directory.
-			- Otherwise, changes the global directory.
+chdir({dir} [, {scope}])                                               *chdir()*
+		Changes the current working directory to {dir}.  The scope of
+		the change is determined as follows:
+		If {scope} is not present, the current working directory is
+		changed to the scope of the current directory:
+		    - If the window local directory (|:lcd|) is set, it
+		      changes the current working directory for that scope.
+		    - Otherwise, if the tab page local directory (|:tcd|) is
+		      set, it changes the current directory for that scope.
+		    - Otherwise, changes the global directory for that scope.
+
+		If {scope} is present, changes the current working directory
+		for the specified scope:
+		    "window"	Changes the window local directory.  |:lcd|
+		    "tabpage"	Changes the tab page local directory.  |:tcd|
+		    "global"	Changes the global directory.  |:cd|
+
 		{dir} must be a String.
 		If successful, returns the previous working directory.  Pass
 		this to another chdir() to restore the directory.
@@ -1033,6 +1040,7 @@ chdir({dir})                                                           *chdir()*
 
                 Parameters: ~
                   • {dir} (`string`)
+                  • {scope} (`string?`)
 
                 Return: ~
                   (`string`)

runtime/lua/vim/_meta/vimfn.lua

@@ -873,15 +873,22 @@ function vim.fn.charcol(expr, winid) end
 --- @return integer
 function vim.fn.charidx(string, idx, countcc, utf16) end
 
---- Change the current working directory to {dir}.  The scope of
---- the directory change depends on the directory of the current
---- window:
----   - If the current window has a window-local directory
----     (|:lcd|), then changes the window local directory.
----   - Otherwise, if the current tabpage has a local
----     directory (|:tcd|) then changes the tabpage local
----     directory.
----   - Otherwise, changes the global directory.
+--- Changes the current working directory to {dir}.  The scope of
+--- the change is determined as follows:
+--- If {scope} is not present, the current working directory is
+--- changed to the scope of the current directory:
+---     - If the window local directory (|:lcd|) is set, it
+---       changes the current working directory for that scope.
+---     - Otherwise, if the tab page local directory (|:tcd|) is
+---       set, it changes the current directory for that scope.
+---     - Otherwise, changes the global directory for that scope.
+---
+--- If {scope} is present, changes the current working directory
+--- for the specified scope:
+---     "window"  Changes the window local directory.  |:lcd|
+---     "tabpage"  Changes the tab page local directory.  |:tcd|
+---     "global"  Changes the global directory.  |:cd|
+---
 --- {dir} must be a String.
 --- If successful, returns the previous working directory.  Pass
 --- this to another chdir() to restore the directory.
@@ -896,8 +903,9 @@ function vim.fn.charidx(string, idx, countcc, utf16) end
 --- <
 ---
 --- @param dir string
+--- @param scope? string
 --- @return string
-function vim.fn.chdir(dir) end
+function vim.fn.chdir(dir, scope) end
 
 --- Get the amount of indent for line {lnum} according the
 --- |C-indenting| rules, as with 'cindent'.

src/nvim/eval.lua

@@ -1190,18 +1190,25 @@ M.funcs = {
     signature = 'charidx({string}, {idx} [, {countcc} [, {utf16}]])',
   },
   chdir = {
-    args = 1,
+    args = { 1, 2 },
     base = 1,
     desc = [=[
-      Change the current working directory to {dir}.  The scope of
-      the directory change depends on the directory of the current
-      window:
-      	- If the current window has a window-local directory
-      	  (|:lcd|), then changes the window local directory.
-      	- Otherwise, if the current tabpage has a local
-      	  directory (|:tcd|) then changes the tabpage local
-      	  directory.
-      	- Otherwise, changes the global directory.
+      Changes the current working directory to {dir}.  The scope of
+      the change is determined as follows:
+      If {scope} is not present, the current working directory is
+      changed to the scope of the current directory:
+          - If the window local directory (|:lcd|) is set, it
+            changes the current working directory for that scope.
+          - Otherwise, if the tab page local directory (|:tcd|) is
+            set, it changes the current directory for that scope.
+          - Otherwise, changes the global directory for that scope.
+
+      If {scope} is present, changes the current working directory
+      for the specified scope:
+          "window"	Changes the window local directory.  |:lcd|
+          "tabpage"	Changes the tab page local directory.  |:tcd|
+          "global"	Changes the global directory.  |:cd|
+
       {dir} must be a String.
       If successful, returns the previous working directory.  Pass
       this to another chdir() to restore the directory.
@@ -1217,9 +1224,9 @@ M.funcs = {
 
     ]=],
     name = 'chdir',
-    params = { { 'dir', 'string' } },
+    params = { { 'dir', 'string' }, { 'scope', 'string' } },
     returns = 'string',
-    signature = 'chdir({dir})',
+    signature = 'chdir({dir} [, {scope}])',
   },
   cindent = {
     args = 1,

src/nvim/eval/fs.c

@@ -74,7 +74,19 @@ void f_chdir(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
   xfree(cwd);
 
   CdScope scope = kCdScopeGlobal;
-  if (curwin->w_localdir != NULL) {
+  if (argvars[1].v_type != VAR_UNKNOWN) {
+    const char *s = tv_get_string(&argvars[1]);
+    if (strcmp(s, "global") == 0) {
+      scope = kCdScopeGlobal;
+    } else if (strcmp(s, "tabpage") == 0) {
+      scope = kCdScopeTabpage;
+    } else if (strcmp(s, "window") == 0) {
+      scope = kCdScopeWindow;
+    } else {
+      semsg(_(e_invargNval), "scope", s);
+      return;
+    }
+  } else if (curwin->w_localdir != NULL) {
     scope = kCdScopeWindow;
   } else if (curtab->tp_localdir != NULL) {
     scope = kCdScopeTabpage;

test/old/testdir/test_cd.vim

@@ -99,10 +99,20 @@ func Test_chdir_func()
   call assert_equal('y', fnamemodify(getcwd(3, 2), ':t'))
   call assert_equal('testdir', fnamemodify(getcwd(1, 1), ':t'))
 
+  " Forcing scope
+  call chdir('.', 'global')
+  call assert_match('^\[global\]', trim(execute('verbose pwd')))
+  call chdir('.', 'tabpage')
+  call assert_match('^\[tabpage\]', trim(execute('verbose pwd')))
+  call chdir('.', 'window')
+  call assert_match('^\[window\]', trim(execute('verbose pwd')))
+
   " Error case
   call assert_fails("call chdir('dir-abcd')", 'E344:')
   silent! let d = chdir("dir_abcd")
   call assert_equal("", d)
+  call assert_fails("call chdir('.', v:_null_string)", 'E475:')
+  call assert_fails("call chdir('.', [])", 'E730:')
   " Should not crash
   call chdir(d)
   call assert_equal('', chdir([]))