Move apply_autocmd_dirchanged() to vim_chdir()

src/nvim/api/vim.c

@@ -315,7 +315,7 @@ void nvim_set_current_dir(String dir, Error *err)
 
   try_start();
 
-  if (vim_chdir((char_u *)string)) {
+  if (vim_chdir((char_u *)string, kCdScopeGlobal)) {
     if (!try_end(err)) {
       api_set_error(err, Exception, _("Failed to change directory"));
     }

src/nvim/ex_docmd.c

@@ -6949,35 +6949,6 @@ void free_cd_dir(void)
 
 #endif
 
-void apply_autocmd_dirchanged(char_u *new_dir, CdScope scope)
-{
-  dict_T *dict = get_vim_var_dict(VV_EVENT);
-  char buf[8];
-
-  switch (scope) {
-  case kCdScopeGlobal:
-    snprintf(buf, sizeof(buf), "global");
-    break;
-  case kCdScopeTab:
-    snprintf(buf, sizeof(buf), "tab");
-    break;
-  case kCdScopeWindow:
-    snprintf(buf, sizeof(buf), "window");
-    break;
-  case kCdScopeInvalid:
-    // Should never happen.
-    assert(false);
-  }
-
-  dict_add_nr_str(dict, "scope", 0L, (char_u *)buf);
-  dict_add_nr_str(dict, "cwd",   0L, new_dir);
-  dict_set_keys_readonly(dict);
-
-  apply_autocmds(EVENT_DIRCHANGED, NULL, new_dir, false, NULL);
-
-  dict_clear(dict);
-}
-
 /// Deal with the side effects of changing the current directory.
 ///
 /// @param scope  Scope of the function call (global, tab or window).
@@ -7001,8 +6972,6 @@ void post_chdir(CdScope scope)
     }
   }
 
-  apply_autocmd_dirchanged(new_dir, scope);
-
   switch (scope) {
   case kCdScopeGlobal:
     // We are now in the global directory, no need to remember its name.
@@ -7070,30 +7039,31 @@ void ex_cd(exarg_T *eap)
       new_dir = NameBuff;
     }
 #endif
-    if (vim_chdir(new_dir)) {
+    CdScope scope = kCdScopeGlobal;  // Depends on command invoked
+
+    switch (eap->cmdidx) {
+    case CMD_tcd:
+    case CMD_tchdir:
+      scope = kCdScopeTab;
+      break;
+    case CMD_lcd:
+    case CMD_lchdir:
+      scope = kCdScopeWindow;
+      break;
+    default:
+      break;
+    }
+
+    if (vim_chdir(new_dir, scope)) {
       EMSG(_(e_failed));
     } else {
-      CdScope scope = kCdScopeGlobal;  // Depends on command invoked
-
-      switch (eap->cmdidx) {
-      case CMD_tcd:
-      case CMD_tchdir:
-        scope = kCdScopeTab;
-        break;
-      case CMD_lcd:
-      case CMD_lchdir:
-        scope = kCdScopeWindow;
-        break;
-      default:
-        break;
-      }
-
       post_chdir(scope);
-
       // Echo the new current directory if the command was typed.
       if (KeyTyped || p_verbose >= 5) {
         ex_pwd(eap);
+      }
     }
+
     xfree(tofree);
   }
 }

src/nvim/ex_docmd.h

@@ -19,21 +19,6 @@
 #define EXMODE_NORMAL           1
 #define EXMODE_VIM              2
 
-/// The scope of a working-directory command like `:cd`.
-///
-/// Scopes are enumerated from lowest to highest. When adding a scope make sure
-/// to update all functions using scopes as well, such as the implementation of
-/// `getcwd()`. When using scopes as limits (e.g. in loops) don't use the scopes
-/// directly, use `MIN_CD_SCOPE` and `MAX_CD_SCOPE` instead.
-typedef enum {
-  kCdScopeInvalid = -1,
-  kCdScopeWindow,  ///< Affects one window.
-  kCdScopeTab,     ///< Affects one tab page.
-  kCdScopeGlobal,  ///< Affects the entire instance of Neovim.
-} CdScope;
-#define MIN_CD_SCOPE  kCdScopeWindow
-#define MAX_CD_SCOPE  kCdScopeGlobal
-
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "ex_docmd.h.generated.h"
 #endif

src/nvim/file_search.c

@@ -48,10 +48,10 @@
 #include <limits.h>
 
 #include "nvim/vim.h"
+#include "nvim/eval.h"
 #include "nvim/ascii.h"
 #include "nvim/file_search.h"
 #include "nvim/charset.h"
-#include "nvim/ex_docmd.h"
 #include "nvim/fileio.h"
 #include "nvim/memory.h"
 #include "nvim/message.h"
@@ -1523,6 +1523,47 @@ theend:
   return file_name;
 }
 
+static void do_autocmd_dirchanged(char_u *new_dir, CdScope scope)
+{
+  static bool recursive = false;
+
+  if (recursive || !has_event(EVENT_DIRCHANGED)) {
+    // No autocommand was defined or we changed
+    // the directory from this autocommand.
+    return;
+  }
+
+  recursive = true;
+
+  dict_T *dict = get_vim_var_dict(VV_EVENT);
+  char buf[8];
+
+  switch (scope) {
+  case kCdScopeGlobal:
+    snprintf(buf, sizeof(buf), "global");
+    break;
+  case kCdScopeTab:
+    snprintf(buf, sizeof(buf), "tab");
+    break;
+  case kCdScopeWindow:
+    snprintf(buf, sizeof(buf), "window");
+    break;
+  case kCdScopeInvalid:
+    // Should never happen.
+    assert(false);
+  }
+
+  dict_add_nr_str(dict, "scope", 0L, (char_u *)buf);
+  dict_add_nr_str(dict, "cwd",   0L, new_dir);
+  dict_set_keys_readonly(dict);
+
+  apply_autocmds(EVENT_DIRCHANGED, NULL, new_dir, false, NULL);
+
+  dict_clear(dict);
+
+  recursive = false;
+}
+
 /// Change to a file's directory.
 /// Caller must call shorten_fnames()!
 /// @return OK or FAIL
@@ -1535,20 +1576,25 @@ int vim_chdirfile(char_u *fname)
   if (os_chdir((char *)dir) != 0) {
     return FAIL;
   }
-  apply_autocmd_dirchanged(dir, kCdScopeWindow);
+  do_autocmd_dirchanged(dir, kCdScopeWindow);
 
   return OK;
 }
 
 /// Change directory to "new_dir". Search 'cdpath' for relative directory names.
-int vim_chdir(char_u *new_dir)
+int vim_chdir(char_u *new_dir, CdScope scope)
 {
   char_u *dir_name = find_directory_in_path(new_dir, STRLEN(new_dir),
                                             FNAME_MESS, curbuf->b_ffname);
   if (dir_name == NULL) {
     return -1;
   }
+
   int r = os_chdir((char *)dir_name);
+  if (r == 0) {
+    do_autocmd_dirchanged(dir_name, scope);
+  }
+
   xfree(dir_name);
   return r;
 }

src/nvim/globals.h

@@ -1249,4 +1249,20 @@ typedef enum {
   kBroken
 } WorkingStatus;
 
+/// The scope of a working-directory command like `:cd`.
+///
+/// Scopes are enumerated from lowest to highest. When adding a scope make sure
+/// to update all functions using scopes as well, such as the implementation of
+/// `getcwd()`. When using scopes as limits (e.g. in loops) don't use the scopes
+/// directly, use `MIN_CD_SCOPE` and `MAX_CD_SCOPE` instead.
+typedef enum {
+  kCdScopeInvalid = -1,
+  kCdScopeWindow,  ///< Affects one window.
+  kCdScopeTab,     ///< Affects one tab page.
+  kCdScopeGlobal,  ///< Affects the entire instance of Neovim.
+} CdScope;
+
+#define MIN_CD_SCOPE  kCdScopeWindow
+#define MAX_CD_SCOPE  kCdScopeGlobal
+
 #endif /* NVIM_GLOBALS_H */

src/nvim/types.h

@@ -14,4 +14,5 @@ typedef unsigned char char_u;
 typedef uint32_t u8char_T;
 
 typedef struct expand expand_T;
+
 #endif  // NVIM_TYPES_H