updated for version 7.4.414
Problem: Cannot define a command only when it's used.
Solution: Add the CmdUndefined autocommand event. (partly by Yasuhiro
Matsumoto)
diff --git a/runtime/doc/autocmd.txt b/runtime/doc/autocmd.txt
index 2a8bece..079b916 100644
--- a/runtime/doc/autocmd.txt
+++ b/runtime/doc/autocmd.txt
@@ -278,6 +278,7 @@
|ShellCmdPost| after executing a shell command
|ShellFilterPost| after filtering with a shell command
+|CmdUndefined| a user command is used but it isn't defined
|FuncUndefined| a user function is used but it isn't defined
|SpellFileMissing| a spell file is used but it can't be found
|SourcePre| before sourcing a Vim script
@@ -465,6 +466,16 @@
*BufWritePost*
BufWritePost After writing the whole buffer to a file
(should undo the commands for BufWritePre).
+ *CmdUndefined*
+CmdUndefined When a user command is used but it isn't
+ defined. Useful for defining a command only
+ when it's used. The pattern is matched
+ against the command name. Both <amatch> and
+ <afile> are set to the name of the command.
+ NOTE: Autocompletion won't work until the
+ command is defined. An alternative is to
+ always define the user command and have it
+ invoke an autoloaded function. See |autoload|.
*CmdwinEnter*
CmdwinEnter After entering the command-line window.
Useful for setting options specifically for
@@ -670,6 +681,8 @@
when it's used. The pattern is matched
against the function name. Both <amatch> and
<afile> are set to the name of the function.
+ NOTE: When writing Vim scripts a better
+ alternative is to use an autoloaded function.
See |autoload-functions|.
*GUIEnter*
GUIEnter After starting the GUI successfully, and after
diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index fecb653..6826951 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -2143,6 +2143,26 @@
/* Find the command and let "p" point to after it. */
p = find_command(&ea, NULL);
+#ifdef FEAT_AUTOCMD
+ /* If this looks like an undefined user command and there are CmdUndefined
+ * autocommands defined, trigger the matching autocommands. */
+ if (p != NULL && ea.cmdidx == CMD_SIZE && !ea.skip
+ && ASCII_ISUPPER(*ea.cmd)
+ && has_cmdundefined())
+ {
+ char_u *p = ea.cmd;
+ int ret;
+
+ while (ASCII_ISALNUM(*p))
+ ++p;
+ p = vim_strnsave(ea.cmd, p - ea.cmd);
+ ret = apply_autocmds(EVENT_CMDUNDEFINED, p, p, TRUE, NULL);
+ vim_free(p);
+ if (ret && !aborting())
+ p = find_command(&ea, NULL);
+ }
+#endif
+
#ifdef FEAT_USR_CMDS
if (p == NULL)
{
diff --git a/src/fileio.c b/src/fileio.c
index 17490ac..f2d2040 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -7641,6 +7641,7 @@
{"BufWriteCmd", EVENT_BUFWRITECMD},
{"CmdwinEnter", EVENT_CMDWINENTER},
{"CmdwinLeave", EVENT_CMDWINLEAVE},
+ {"CmdUndefined", EVENT_CMDUNDEFINED},
{"ColorScheme", EVENT_COLORSCHEME},
{"CompleteDone", EVENT_COMPLETEDONE},
{"CursorHold", EVENT_CURSORHOLD},
@@ -9159,6 +9160,24 @@
return (first_autopat[(int)EVENT_INSERTCHARPRE] != NULL);
}
+/*
+ * Return TRUE when there is an CmdUndefined autocommand defined.
+ */
+ int
+has_cmdundefined()
+{
+ return (first_autopat[(int)EVENT_CMDUNDEFINED] != NULL);
+}
+
+/*
+ * Return TRUE when there is an FuncUndefined autocommand defined.
+ */
+ int
+has_funcundefined()
+{
+ return (first_autopat[(int)EVENT_FUNCUNDEFINED] != NULL);
+}
+
static int
apply_autocmds_group(event, fname, fname_io, force, group, buf, eap)
event_T event;
diff --git a/src/proto/fileio.pro b/src/proto/fileio.pro
index 0d532f4..5b71d0a 100644
--- a/src/proto/fileio.pro
+++ b/src/proto/fileio.pro
@@ -47,6 +47,8 @@
int has_textchanged __ARGS((void));
int has_textchangedI __ARGS((void));
int has_insertcharpre __ARGS((void));
+int has_cmdundefined __ARGS((void));
+int has_funcundefined __ARGS((void));
void block_autocmds __ARGS((void));
void unblock_autocmds __ARGS((void));
int is_autocmd_blocked __ARGS((void));
diff --git a/src/version.c b/src/version.c
index e742d18..ae87bb5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
+ 414,
+/**/
413,
/**/
412,
