patch 7.4.1754

Problem:    When 'filetype' was set and reloading a buffer which does not
            cause it to be set, the syntax isn't loaded. (KillTheMule)
Solution:   Remember whether the FileType event was fired and fire it if not.
            (Anton Lindqvist, closes #747)

src/fileio.c

@@ -141,6 +141,18 @@ static void vim_settempdir(char_u *tempdir);
 #endif
 #ifdef FEAT_AUTOCMD
 static char *e_auchangedbuf = N_("E812: Autocommands changed buffer or buffer name");
+#endif
+
+#ifdef FEAT_AUTOCMD
+/*
+ * Set by the apply_autocmds_group function if the given event is equal to
+ * EVENT_FILETYPE. Used by the readfile function in order to determine if
+ * EVENT_BUFREADPOST triggered the EVENT_FILETYPE.
+ *
+ * Relying on this value requires one to reset it prior calling
+ * apply_autocmds_group.
+ */
+static int au_did_filetype INIT(= FALSE);
 #endif
 
     void
@@ -305,6 +317,10 @@ readfile(
     int		using_b_fname;
 #endif
 
+#ifdef FEAT_AUTOCMD
+    au_did_filetype = FALSE; /* reset before triggering any autocommands */
+#endif
+
     curbuf->b_no_eol_lnum = 0;	/* in case it was set by the previous read */
 
     /*
@@ -2669,8 +2685,17 @@ failed:
 	    apply_autocmds_exarg(EVENT_FILTERREADPOST, NULL, sfname,
 							  FALSE, curbuf, eap);
 	else if (newfile)
+	{
 	    apply_autocmds_exarg(EVENT_BUFREADPOST, NULL, sfname,
 							  FALSE, curbuf, eap);
+	    if (!au_did_filetype && *curbuf->b_p_ft != NUL)
+		/*
+		 * EVENT_FILETYPE was not triggered but the buffer already has a
+		 * filetype. Trigger EVENT_FILETYPE using the existing filetype.
+		 */
+		apply_autocmds(EVENT_FILETYPE, curbuf->b_p_ft, curbuf->b_fname,
+			TRUE, curbuf);
+	}
 	else
 	    apply_autocmds_exarg(EVENT_FILEREADPOST, sfname, sfname,
 							    FALSE, NULL, eap);
@@ -9537,6 +9562,9 @@ BYPASS_AU:
     if (event == EVENT_BUFWIPEOUT && buf != NULL)
 	aubuflocal_remove(buf);
 
+    if (retval == OK && event == EVENT_FILETYPE)
+	au_did_filetype = TRUE;
+
     return retval;
 }
 

src/testdir/test_syntax.vim

@@ -65,3 +65,18 @@ func Test_syn_iskeyword()
 
   quit!
 endfunc
+
+func Test_syntax_after_reload()
+  split Xsomefile
+  call setline(1, ['hello', 'there'])
+  w!
+  only!
+  setl filetype=hello
+  au FileType hello let g:gotit = 1
+  call assert_false(exists('g:gotit'))
+  edit other
+  buf Xsomefile
+  call assert_equal('hello', &filetype)
+  call assert_true(exists('g:gotit'))
+  call delete('Xsomefile')
+endfunc

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1754,
 /**/
     1753,
 /**/