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Merge #9728 from justinmk/autocmd-once
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@@ -40,7 +40,7 @@ effects. Be careful not to destroy your text.
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2. Defining autocommands *autocmd-define*
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*:au* *:autocmd*
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:au[tocmd] [group] {event} {pat} [-once] [-nested] {cmd}
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:au[tocmd] [group] {event} {pat} [++once] [++nested] {cmd}
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Add {cmd} to the list of commands that Vim will
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execute automatically on {event} for a file matching
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{pat} |autocmd-patterns|.
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@@ -48,9 +48,9 @@ effects. Be careful not to destroy your text.
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:autocmd and won't start a comment.
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Nvim always adds {cmd} after existing autocommands so
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they execute in the order in which they were defined.
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See |autocmd-nested| for [-nested].
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See |autocmd-nested| for [++nested].
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*autocmd-once*
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If [-once] is supplied the command is executed once,
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If [++once] is supplied the command is executed once,
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then removed ("one shot").
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The special pattern <buffer> or <buffer=N> defines a buffer-local autocommand.
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@@ -119,11 +119,11 @@ prompt. When one command outputs two messages this can happen anyway.
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==============================================================================
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3. Removing autocommands *autocmd-remove*
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:au[tocmd]! [group] {event} {pat} [-once] [-nested] {cmd}
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:au[tocmd]! [group] {event} {pat} [++once] [++nested] {cmd}
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Remove all autocommands associated with {event} and
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{pat}, and add the command {cmd}.
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See |autocmd-once| for [-once].
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See |autocmd-nested| for [-nested].
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See |autocmd-once| for [++once].
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See |autocmd-nested| for [++nested].
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:au[tocmd]! [group] {event} {pat}
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Remove all autocommands associated with {event} and
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@@ -1446,9 +1446,9 @@ instead of ":q!".
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*autocmd-nested* *E218*
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By default, autocommands do not nest. If you use ":e" or ":w" in an
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autocommand, Vim does not execute the BufRead and BufWrite autocommands for
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those commands. If you do want this, use the "-nested" flag for those
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those commands. If you do want this, use the "++nested" flag for those
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commands in which you want nesting. For example: >
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:autocmd FileChangedShell *.c -nested e!
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:autocmd FileChangedShell *.c ++nested e!
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The nesting is limited to 10 levels to get out of recursive loops.
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It's possible to use the ":au" command in an autocommand. This can be a
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@@ -35,7 +35,7 @@ There are 3 ways to create a terminal buffer:
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<
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Note: The "term://" pattern is handled by a BufReadCmd handler, so the
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|autocmd-nested| modifier is required to use it in an autocmd. >
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autocmd VimEnter * -nested split term://sh
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autocmd VimEnter * ++nested split term://sh
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< This is only mentioned for reference; use |:terminal| instead.
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When the terminal starts, the buffer contents are updated and the buffer is
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@@ -453,14 +453,14 @@ matching BufWritePre autocommands and executes them, and then it
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performs the ":write".
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The general form of the :autocmd command is as follows: >
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:autocmd [group] {events} {file_pattern} [-nested] {command}
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:autocmd [group] {events} {file_pattern} [++nested] {command}
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The [group] name is optional. It is used in managing and calling the commands
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(more on this later). The {events} parameter is a list of events (comma
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separated) that trigger the command.
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{file_pattern} is a filename, usually with wildcards. For example, using
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"*.txt" makes the autocommand be used for all files whose name end in ".txt".
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The optional [-nested] flag allows for nesting of autocommands (see below),
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The optional [++nested] flag allows for nesting of autocommands (see below),
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and finally, {command} is the command to be executed.
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@@ -576,9 +576,9 @@ NESTING
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Generally, commands executed as the result of an autocommand event will not
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trigger any new events. If you read a file in response to a FileChangedShell
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event, it will not trigger the autocommands that would set the syntax, for
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example. To make the events triggered, add the "-nested" flag: >
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example. To make the events triggered, add the "++nested" flag: >
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:autocmd FileChangedShell * -nested edit
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:autocmd FileChangedShell * ++nested edit
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EXECUTING AUTOCOMMANDS
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@@ -133,7 +133,7 @@ Command-line highlighting:
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removed in the future).
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Commands:
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|:autocmd| accepts the `once` flag
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|:autocmd| accepts the `++once` flag
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|:checkhealth|
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|:cquit| can use [count] to set the exit code
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|:drop| is always available
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@@ -880,15 +880,15 @@ CTRL-W g } *CTRL-W_g}*
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cursor. This is less clever than using |:ptag|, but you don't
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need a tags file and it will also find matches in system
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include files. Example: >
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:au! CursorHold *.[ch] -nested exe "silent! psearch " . expand("<cword>")
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:au! CursorHold *.[ch] ++nested exe "silent! psearch " . expand("<cword>")
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< Warning: This can be slow.
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Example *CursorHold-example* >
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:au! CursorHold *.[ch] -nested exe "silent! ptag " . expand("<cword>")
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:au! CursorHold *.[ch] ++nested exe "silent! ptag " . expand("<cword>")
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This will cause a ":ptag" to be executed for the keyword under the cursor,
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when the cursor hasn't moved for the time set with 'updatetime'. "-nested"
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when the cursor hasn't moved for the time set with 'updatetime'. "++nested"
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makes other autocommands be executed, so that syntax highlighting works in the
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preview window. The "silent!" avoids an error message when the tag could not
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be found. Also see |CursorHold|. To disable this again: >
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@@ -898,7 +898,7 @@ be found. Also see |CursorHold|. To disable this again: >
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A nice addition is to highlight the found tag, avoid the ":ptag" when there
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is no word under the cursor, and a few other things: >
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:au! CursorHold *.[ch] -nested call PreviewWord()
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:au! CursorHold *.[ch] ++nested call PreviewWord()
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:func PreviewWord()
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: if &previewwindow " don't do this in the preview window
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: return
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