diff options
Diffstat (limited to 'runtime/doc/autocmd.txt')
| -rw-r--r-- | runtime/doc/autocmd.txt | 1616 |
1 files changed, 1616 insertions, 0 deletions
diff --git a/runtime/doc/autocmd.txt b/runtime/doc/autocmd.txt new file mode 100644 index 0000000..087e31a --- /dev/null +++ b/runtime/doc/autocmd.txt @@ -0,0 +1,1616 @@ +*autocmd.txt* For Vim version 8.1. Last change: 2019 Jan 19 + + + VIM REFERENCE MANUAL by Bram Moolenaar + + +Automatic commands *autocommand* *autocommands* + +For a basic explanation, see section |40.3| in the user manual. + +1. Introduction |autocmd-intro| +2. Defining autocommands |autocmd-define| +3. Removing autocommands |autocmd-remove| +4. Listing autocommands |autocmd-list| +5. Events |autocmd-events| +6. Patterns |autocmd-patterns| +7. Buffer-local autocommands |autocmd-buflocal| +8. Groups |autocmd-groups| +9. Executing autocommands |autocmd-execute| +10. Using autocommands |autocmd-use| +11. Disabling autocommands |autocmd-disable| + +{Vi does not have any of these commands} + +============================================================================== +1. Introduction *autocmd-intro* + +You can specify commands to be executed automatically when reading or writing +a file, when entering or leaving a buffer or window, and when exiting Vim. +For example, you can create an autocommand to set the 'cindent' option for +files matching *.c. You can also use autocommands to implement advanced +features, such as editing compressed files (see |gzip-example|). The usual +place to put autocommands is in your .vimrc or .exrc file. + + *E203* *E204* *E143* *E855* *E937* *E952* +WARNING: Using autocommands is very powerful, and may lead to unexpected side +effects. Be careful not to destroy your text. +- It's a good idea to do some testing on an expendable copy of a file first. + For example: If you use autocommands to decompress a file when starting to + edit it, make sure that the autocommands for compressing when writing work + correctly. +- Be prepared for an error halfway through (e.g., disk full). Vim will mostly + be able to undo the changes to the buffer, but you may have to clean up the + changes to other files by hand (e.g., compress a file that has been + decompressed). +- If the BufRead* events allow you to edit a compressed file, the FileRead* + events should do the same (this makes recovery possible in some rare cases). + It's a good idea to use the same autocommands for the File* and Buf* events + when possible. + +============================================================================== +2. Defining autocommands *autocmd-define* + + *:au* *:autocmd* +:au[tocmd] [group] {event} {pat} [nested] {cmd} + Add {cmd} to the list of commands that Vim will + execute automatically on {event} for a file matching + {pat} |autocmd-patterns|. + Note: A quote character is seen as argument to the + :autocmd and won't start a comment. + Vim always adds the {cmd} after existing autocommands, + so that the autocommands execute in the order in which + they were given. See |autocmd-nested| for [nested]. + +The special pattern <buffer> or <buffer=N> defines a buffer-local autocommand. +See |autocmd-buflocal|. + +Note: The ":autocmd" command can only be followed by another command when the +'|' appears before {cmd}. This works: > + :augroup mine | au! BufRead | augroup END +But this sees "augroup" as part of the defined command: > + :augroup mine | au! BufRead * | augroup END + :augroup mine | au BufRead * set tw=70 | augroup END +Instead you can put the group name into the command: > + :au! mine BufRead * + :au mine BufRead * set tw=70 +Or use `:execute`: > + :augroup mine | exe "au! BufRead *" | augroup END + :augroup mine | exe "au BufRead * set tw=70" | augroup END + +Note that special characters (e.g., "%", "<cword>") in the ":autocmd" +arguments are not expanded when the autocommand is defined. These will be +expanded when the Event is recognized, and the {cmd} is executed. The only +exception is that "<sfile>" is expanded when the autocmd is defined. Example: +> + :au BufNewFile,BufRead *.html so <sfile>:h/html.vim + +Here Vim expands <sfile> to the name of the file containing this line. + +`:autocmd` adds to the list of autocommands regardless of whether they are +already present. When your .vimrc file is sourced twice, the autocommands +will appear twice. To avoid this, define your autocommands in a group, so +that you can easily clear them: > + + augroup vimrc + " Remove all vimrc autocommands + autocmd! + au BufNewFile,BufRead *.html so <sfile>:h/html.vim + augroup END + +If you don't want to remove all autocommands, you can instead use a variable +to ensure that Vim includes the autocommands only once: > + + :if !exists("autocommands_loaded") + : let autocommands_loaded = 1 + : au ... + :endif + +When the [group] argument is not given, Vim uses the current group (as defined +with ":augroup"); otherwise, Vim uses the group defined with [group]. Note +that [group] must have been defined before. You cannot define a new group +with ":au group ..."; use ":augroup" for that. + +While testing autocommands, you might find the 'verbose' option to be useful: > + :set verbose=9 +This setting makes Vim echo the autocommands as it executes them. + +When defining an autocommand in a script, it will be able to call functions +local to the script and use mappings local to the script. When the event is +triggered and the command executed, it will run in the context of the script +it was defined in. This matters if |<SID>| is used in a command. + +When executing the commands, the message from one command overwrites a +previous message. This is different from when executing the commands +manually. Mostly the screen will not scroll up, thus there is no hit-enter +prompt. When one command outputs two messages this can happen anyway. + +============================================================================== +3. Removing autocommands *autocmd-remove* + +:au[tocmd]! [group] {event} {pat} [nested] {cmd} + Remove all autocommands associated with {event} and + {pat}, and add the command {cmd}. See + |autocmd-nested| for [nested]. + +:au[tocmd]! [group] {event} {pat} + Remove all autocommands associated with {event} and + {pat}. + +:au[tocmd]! [group] * {pat} + Remove all autocommands associated with {pat} for all + events. + +:au[tocmd]! [group] {event} + Remove ALL autocommands for {event}. + Warning: You should not do this without a group for + |BufRead| and other common events, it can break + plugins, syntax highlighting, etc. + +:au[tocmd]! [group] Remove ALL autocommands. + Note: a quote will be seen as argument to the :autocmd + and won't start a comment. + Warning: You should normally not do this without a + group, it breaks plugins, syntax highlighting, etc. + +When the [group] argument is not given, Vim uses the current group (as defined +with ":augroup"); otherwise, Vim uses the group defined with [group]. + +============================================================================== +4. Listing autocommands *autocmd-list* + +:au[tocmd] [group] {event} {pat} + Show the autocommands associated with {event} and + {pat}. + +:au[tocmd] [group] * {pat} + Show the autocommands associated with {pat} for all + events. + +:au[tocmd] [group] {event} + Show all autocommands for {event}. + +:au[tocmd] [group] Show all autocommands. + +If you provide the [group] argument, Vim lists only the autocommands for +[group]; otherwise, Vim lists the autocommands for ALL groups. Note that this +argument behavior differs from that for defining and removing autocommands. + +In order to list buffer-local autocommands, use a pattern in the form <buffer> +or <buffer=N>. See |autocmd-buflocal|. + + *:autocmd-verbose* +When 'verbose' is non-zero, listing an autocommand will also display where it +was last defined. Example: > + + :verbose autocmd BufEnter + FileExplorer BufEnter + * call s:LocalBrowse(expand("<amatch>")) + Last set from /usr/share/vim/vim-7.0/plugin/NetrwPlugin.vim +< +See |:verbose-cmd| for more information. + +============================================================================== +5. Events *autocmd-events* *E215* *E216* + +You can specify a comma-separated list of event names. No white space can be +used in this list. The command applies to all the events in the list. + +For READING FILES there are four kinds of events possible: + BufNewFile starting to edit a non-existent file + BufReadPre BufReadPost starting to edit an existing file + FilterReadPre FilterReadPost read the temp file with filter output + FileReadPre FileReadPost any other file read +Vim uses only one of these four kinds when reading a file. The "Pre" and +"Post" events are both triggered, before and after reading the file. + +Note that the autocommands for the *ReadPre events and all the Filter events +are not allowed to change the current buffer (you will get an error message if +this happens). This is to prevent the file to be read into the wrong buffer. + +Note that the 'modified' flag is reset AFTER executing the BufReadPost +and BufNewFile autocommands. But when the 'modified' option was set by the +autocommands, this doesn't happen. + +You can use the 'eventignore' option to ignore a number of events or all +events. + *autocommand-events* *{event}* +Vim recognizes the following events. Vim ignores the case of event names +(e.g., you can use "BUFread" or "bufread" instead of "BufRead"). + +First an overview by function with a short explanation. Then the list +alphabetically with full explanations |autocmd-events-abc|. + +Name triggered by ~ + + Reading +|BufNewFile| starting to edit a file that doesn't exist +|BufReadPre| starting to edit a new buffer, before reading the file +|BufRead| starting to edit a new buffer, after reading the file +|BufReadPost| starting to edit a new buffer, after reading the file +|BufReadCmd| before starting to edit a new buffer |Cmd-event| + +|FileReadPre| before reading a file with a ":read" command +|FileReadPost| after reading a file with a ":read" command +|FileReadCmd| before reading a file with a ":read" command |Cmd-event| + +|FilterReadPre| before reading a file from a filter command +|FilterReadPost| after reading a file from a filter command + +|StdinReadPre| before reading from stdin into the buffer +|StdinReadPost| After reading from the stdin into the buffer + + Writing +|BufWrite| starting to write the whole buffer to a file +|BufWritePre| starting to write the whole buffer to a file +|BufWritePost| after writing the whole buffer to a file +|BufWriteCmd| before writing the whole buffer to a file |Cmd-event| + +|FileWritePre| starting to write part of a buffer to a file +|FileWritePost| after writing part of a buffer to a file +|FileWriteCmd| before writing part of a buffer to a file |Cmd-event| + +|FileAppendPre| starting to append to a file +|FileAppendPost| after appending to a file +|FileAppendCmd| before appending to a file |Cmd-event| + +|FilterWritePre| starting to write a file for a filter command or diff +|FilterWritePost| after writing a file for a filter command or diff + + Buffers +|BufAdd| just after adding a buffer to the buffer list +|BufCreate| just after adding a buffer to the buffer list +|BufDelete| before deleting a buffer from the buffer list +|BufWipeout| before completely deleting a buffer +|TerminalOpen| after a terminal buffer was created + +|BufFilePre| before changing the name of the current buffer +|BufFilePost| after changing the name of the current buffer + +|BufEnter| after entering a buffer +|BufLeave| before leaving to another buffer +|BufWinEnter| after a buffer is displayed in a window +|BufWinLeave| before a buffer is removed from a window + +|BufUnload| before unloading a buffer +|BufHidden| just after a buffer has become hidden +|BufNew| just after creating a new buffer + +|SwapExists| detected an existing swap file + + Options +|FileType| when the 'filetype' option has been set +|Syntax| when the 'syntax' option has been set +|EncodingChanged| after the 'encoding' option has been changed +|TermChanged| after the value of 'term' has changed +|OptionSet| after setting any option + + Startup and exit +|VimEnter| after doing all the startup stuff +|GUIEnter| after starting the GUI successfully +|GUIFailed| after starting the GUI failed +|TermResponse| after the terminal response to |t_RV| is received + +|QuitPre| when using `:quit`, before deciding whether to exit +|ExitPre| when using a command that may make Vim exit +|VimLeavePre| before exiting Vim, before writing the viminfo file +|VimLeave| before exiting Vim, after writing the viminfo file + + Various +|FileChangedShell| Vim notices that a file changed since editing started +|FileChangedShellPost| After handling a file changed since editing started +|FileChangedRO| before making the first change to a read-only file + +|DiffUpdated| after diffs have been updated +|DirChanged| after the working directory has changed + +|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 +|SourcePost| after sourcing a Vim script +|SourceCmd| before sourcing a Vim script |Cmd-event| + +|VimResized| after the Vim window size changed +|FocusGained| Vim got input focus +|FocusLost| Vim lost input focus +|CursorHold| the user doesn't press a key for a while +|CursorHoldI| the user doesn't press a key for a while in Insert mode +|CursorMoved| the cursor was moved in Normal mode +|CursorMovedI| the cursor was moved in Insert mode + +|WinNew| after creating a new window +|TabNew| after creating a new tab page +|TabClosed| after closing a tab page +|WinEnter| after entering another window +|WinLeave| before leaving a window +|TabEnter| after entering another tab page +|TabLeave| before leaving a tab page +|CmdwinEnter| after entering the command-line window +|CmdwinLeave| before leaving the command-line window + +|CmdlineChanged| after a change was made to the command-line text +|CmdlineEnter| after the cursor moves to the command line +|CmdlineLeave| before the cursor leaves the command line + +|InsertEnter| starting Insert mode +|InsertChange| when typing <Insert> while in Insert or Replace mode +|InsertLeave| when leaving Insert mode +|InsertCharPre| when a character was typed in Insert mode, before + inserting it + +|TextChanged| after a change was made to the text in Normal mode +|TextChangedI| after a change was made to the text in Insert mode + when popup menu is not visible +|TextChangedP| after a change was made to the text in Insert mode + when popup menu visible +|TextYankPost| after text has been yanked or deleted + +|ColorSchemePre| before loading a color scheme +|ColorScheme| after loading a color scheme + +|RemoteReply| a reply from a server Vim was received + +|QuickFixCmdPre| before a quickfix command is run +|QuickFixCmdPost| after a quickfix command is run + +|SessionLoadPost| after loading a session file + +|MenuPopup| just before showing the popup menu +|CompleteDone| after Insert mode completion is done + +|User| to be used in combination with ":doautocmd" + + +The alphabetical list of autocommand events: *autocmd-events-abc* + + *BufCreate* *BufAdd* +BufAdd or BufCreate Just after creating a new buffer which is + added to the buffer list, or adding a buffer + to the buffer list. + Also used just after a buffer in the buffer + list has been renamed. + The BufCreate event is for historic reasons. + NOTE: When this autocommand is executed, the + current buffer "%" may be different from the + buffer being created "<afile>". + *BufDelete* +BufDelete Before deleting a buffer from the buffer list. + The BufUnload may be called first (if the + buffer was loaded). + Also used just before a buffer in the buffer + list is renamed. + NOTE: When this autocommand is executed, the + current buffer "%" may be different from the + buffer being deleted "<afile>" and "<abuf>". + Don't change to another buffer, it will cause + problems. + *BufEnter* +BufEnter After entering a buffer. Useful for setting + options for a file type. Also executed when + starting to edit a buffer, after the + BufReadPost autocommands. + *BufFilePost* +BufFilePost After changing the name of the current buffer + with the ":file" or ":saveas" command. + *BufFilePre* +BufFilePre Before changing the name of the current buffer + with the ":file" or ":saveas" command. + *BufHidden* +BufHidden Just after a buffer has become hidden. That + is, when there are no longer windows that show + the buffer, but the buffer is not unloaded or + deleted. Not used for ":qa" or ":q" when + exiting Vim. + NOTE: When this autocommand is executed, the + current buffer "%" may be different from the + buffer being unloaded "<afile>". + *BufLeave* +BufLeave Before leaving to another buffer. Also when + leaving or closing the current window and the + new current window is not for the same buffer. + Not used for ":qa" or ":q" when exiting Vim. + *BufNew* +BufNew Just after creating a new buffer. Also used + just after a buffer has been renamed. When + the buffer is added to the buffer list BufAdd + will be triggered too. + NOTE: When this autocommand is executed, the + current buffer "%" may be different from the + buffer being created "<afile>". + *BufNewFile* +BufNewFile When starting to edit a file that doesn't + exist. Can be used to read in a skeleton + file. + *BufRead* *BufReadPost* +BufRead or BufReadPost When starting to edit a new buffer, after + reading the file into the buffer, before + executing the modelines. See |BufWinEnter| + for when you need to do something after + processing the modelines. + This does NOT work for ":r file". Not used + when the file doesn't exist. Also used after + successfully recovering a file. + Also triggered for the filetypedetect group + when executing ":filetype detect" and when + writing an unnamed buffer in a way that the + buffer gets a name. + *BufReadCmd* +BufReadCmd Before starting to edit a new buffer. Should + read the file into the buffer. |Cmd-event| + *BufReadPre* *E200* *E201* +BufReadPre When starting to edit a new buffer, before + reading the file into the buffer. Not used + if the file doesn't exist. + *BufUnload* +BufUnload Before unloading a buffer. This is when the + text in the buffer is going to be freed. This + may be after a BufWritePost and before a + BufDelete. Also used for all buffers that are + loaded when Vim is going to exit. + NOTE: When this autocommand is executed, the + current buffer "%" may be different from the + buffer being unloaded "<afile>". + Don't change to another buffer or window, it + will cause problems! + When exiting and v:dying is 2 or more this + event is not triggered. + *BufWinEnter* +BufWinEnter After a buffer is displayed in a window. This + can be when the buffer is loaded (after + processing the modelines) or when a hidden + buffer is displayed in a window (and is no + longer hidden). + Does not happen for |:split| without + arguments, since you keep editing the same + buffer, or ":split" with a file that's already + open in a window, because it re-uses an + existing buffer. But it does happen for a + ":split" with the name of the current buffer, + since it reloads that buffer. + Does not happen for a terminal window, because + it starts in Terminal-Job mode and Normal mode + commands won't work. Use |TerminalOpen| instead. + *BufWinLeave* +BufWinLeave Before a buffer is removed from a window. + Not when it's still visible in another window. + Also triggered when exiting. It's triggered + before BufUnload or BufHidden. + NOTE: When this autocommand is executed, the + current buffer "%" may be different from the + buffer being unloaded "<afile>". + When exiting and v:dying is 2 or more this + event is not triggered. + *BufWipeout* +BufWipeout Before completely deleting a buffer. The + BufUnload and BufDelete events may be called + first (if the buffer was loaded and was in the + buffer list). Also used just before a buffer + is renamed (also when it's not in the buffer + list). + NOTE: When this autocommand is executed, the + current buffer "%" may be different from the + buffer being deleted "<afile>". + Don't change to another buffer, it will cause + problems. + *BufWrite* *BufWritePre* +BufWrite or BufWritePre Before writing the whole buffer to a file. + *BufWriteCmd* +BufWriteCmd Before writing the whole buffer to a file. + Should do the writing of the file and reset + 'modified' if successful, unless '+' is in + 'cpo' and writing to another file |cpo-+|. + The buffer contents should not be changed. + When the command resets 'modified' the undo + information is adjusted to mark older undo + states as 'modified', like |:write| does. + |Cmd-event| + *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|. + *CmdlineChanged* +CmdlineChanged After a change was made to the text in the + command line. Be careful not to mess up + the command line, it may cause Vim to lock up. + <afile> is set to a single character, + indicating the type of command-line. + |cmdwin-char| + *CmdlineEnter* +CmdlineEnter After moving the cursor to the command line, + where the user can type a command or search + string. + <afile> is set to a single character, + indicating the type of command-line. + |cmdwin-char| + *CmdlineLeave* +CmdlineLeave Before leaving the command line. + Also when abandoning the command line, after + typing CTRL-C or <Esc>. + When the commands result in an error the + command line is still executed. + <afile> is set to a single character, + indicating the type of command-line. + |cmdwin-char| + *CmdwinEnter* +CmdwinEnter After entering the command-line window. + Useful for setting options specifically for + this special type of window. This is + triggered _instead_ of BufEnter and WinEnter. + <afile> is set to a single character, + indicating the type of command-line. + |cmdwin-char| + *CmdwinLeave* +CmdwinLeave Before leaving the command-line window. + Useful to clean up any global setting done + with CmdwinEnter. This is triggered _instead_ + of BufLeave and WinLeave. + <afile> is set to a single character, + indicating the type of command-line. + |cmdwin-char| + *ColorScheme* +ColorScheme After loading a color scheme. |:colorscheme| + The pattern is matched against the + colorscheme name. <afile> can be used for the + name of the actual file where this option was + set, and <amatch> for the new colorscheme + name. + + *ColorSchemePre* +ColorSchemePre Before loading a color scheme. |:colorscheme| + Useful to setup removing things added by a + color scheme, before another one is loaded. + + *CompleteDone* +CompleteDone After Insert mode completion is done. Either + when something was completed or abandoning + completion. |ins-completion| + The |v:completed_item| variable contains + information about the completed item. + + *CursorHold* +CursorHold When the user doesn't press a key for the time + specified with 'updatetime'. Not re-triggered + until the user has pressed a key (i.e. doesn't + fire every 'updatetime' ms if you leave Vim to + make some coffee. :) See |CursorHold-example| + for previewing tags. + This event is only triggered in Normal mode. + It is not triggered when waiting for a command + argument to be typed, or a movement after an + operator. + While recording the CursorHold event is not + triggered. |q| + *<CursorHold>* + Internally the autocommand is triggered by the + <CursorHold> key. In an expression mapping + |getchar()| may see this character. + + Note: Interactive commands cannot be used for + this event. There is no hit-enter prompt, + the screen is updated directly (when needed). + Note: In the future there will probably be + another option to set the time. + Hint: to force an update of the status lines + use: > + :let &ro = &ro +< {only on Amiga, Unix, Win32, MSDOS and all GUI + versions} + *CursorHoldI* +CursorHoldI Just like CursorHold, but in Insert mode. + Not triggered when waiting for another key, + e.g. after CTRL-V, and not when in CTRL-X mode + |insert_expand|. + + *CursorMoved* +CursorMoved After the cursor was moved in Normal or Visual + mode. Also when the text of the cursor line + has been changed, e.g., with "x", "rx" or "p". + Not triggered when there is typeahead or when + an operator is pending. + For an example see |match-parens|. + Careful: This is triggered very often, don't + do anything that the user does not expect or + that is slow. + *CursorMovedI* +CursorMovedI After the cursor was moved in Insert mode. + Not triggered when the popup menu is visible. + Otherwise the same as CursorMoved. + *EncodingChanged* +EncodingChanged Fires off after the 'encoding' option has been + changed. Useful to set up fonts, for example. + *FileAppendCmd* +FileAppendCmd Before appending to a file. Should do the + appending to the file. Use the '[ and '] + marks for the range of lines.|Cmd-event| + *FileAppendPost* +FileAppendPost After appending to a file. + *FileAppendPre* +FileAppendPre Before appending to a file. Use the '[ and '] + marks for the range of lines. + *FileChangedRO* +FileChangedRO Before making the first change to a read-only + file. Can be used to check-out the file from + a source control system. Not triggered when + the change was caused by an autocommand. + This event is triggered when making the first + change in a buffer or the first change after + 'readonly' was set, just before the change is + applied to the text. + WARNING: If the autocommand moves the cursor + the effect of the change is undefined. + *E788* + It is not allowed to change to another buffer + here. You can reload the buffer but not edit + another one. + *E881* + If the number of lines changes saving for undo + may fail and the change will be aborted. + *DiffUpdated* +DiffUpdated After diffs have been updated. Depending on + what kind of diff is being used (internal or + external) this can be triggered on every + change or when doing |:diffupdate|. + *DirChanged* +DirChanged The working directory has changed in response + to the |:cd| or |:lcd| commands, or as a + result of the 'autochdir' option. + The pattern can be: + "window" to trigger on `:lcd` + "global" to trigger on `:cd` + "auto" to trigger on 'autochdir'. + "drop" to trigger on editing a file + <afile> is set to the new directory name. + *ExitPre* +ExitPre When using `:quit`, `:wq` in a way it makes + Vim exit, or using `:qall`, just after + |QuitPre|. Can be used to close any + non-essential window. Exiting may still be + cancelled if there is a modified buffer that + isn't automatically saved, use |VimLeavePre| + for really exiting. + *FileChangedShell* +FileChangedShell When Vim notices that the modification time of + a file has changed since editing started. + Also when the file attributes of the file + change or when the size of the file changes. + |timestamp| + Mostly triggered after executing a shell + command, but also with a |:checktime| command + or when gvim regains input focus. + This autocommand is triggered for each changed + file. It is not used when 'autoread' is set + and the buffer was not changed. If a + FileChangedShell autocommand is present the + warning message and prompt is not given. + The |v:fcs_reason| variable is set to indicate + what happened and |v:fcs_choice| can be used + to tell Vim what to do next. + NOTE: When this autocommand is executed, the + current buffer "%" may be different from the + buffer that was changed, which is in "<afile>". + NOTE: The commands must not change the current + buffer, jump to another buffer or delete a + buffer. *E246* *E811* + NOTE: This event never nests, to avoid an + endless loop. This means that while executing + commands for the FileChangedShell event no + other FileChangedShell event will be + triggered. + *FileChangedShellPost* +FileChangedShellPost After handling a file that was changed outside + of Vim. Can be used to update the statusline. + *FileEncoding* +FileEncoding Obsolete. It still works and is equivalent + to |EncodingChanged|. + *FileReadCmd* +FileReadCmd Before reading a file with a ":read" command. + Should do the reading of the file. |Cmd-event| + *FileReadPost* +FileReadPost After reading a file with a ":read" command. + Note that Vim sets the '[ and '] marks to the + first and last line of the read. This can be + used to operate on the lines just read. + *FileReadPre* +FileReadPre Before reading a file with a ":read" command. + *FileType* +FileType When the 'filetype' option has been set. The + pattern is matched against the filetype. + <afile> can be used for the name of the file + where this option was set, and <amatch> for + the new value of 'filetype'. Navigating to + another window or buffer is not allowed. + See |filetypes|. + *FileWriteCmd* +FileWriteCmd Before writing to a file, when not writing the + whole buffer. Should do the writing to the + file. Should not change the buffer. Use the + '[ and '] marks for the range of lines. + |Cmd-event| + *FileWritePost* +FileWritePost After writing to a file, when not writing the + whole buffer. + *FileWritePre* +FileWritePre Before writing to a file, when not writing the + whole buffer. Use the '[ and '] marks for the + range of lines. + *FilterReadPost* +FilterReadPost After reading a file from a filter command. + Vim checks the pattern against the name of + the current buffer as with FilterReadPre. + Not triggered when 'shelltemp' is off. + *FilterReadPre* *E135* +FilterReadPre Before reading a file from a filter command. + Vim checks the pattern against the name of + the current buffer, not the name of the + temporary file that is the output of the + filter command. + Not triggered when 'shelltemp' is off. + *FilterWritePost* +FilterWritePost After writing a file for a filter command or + making a diff with an external diff (see + DiffUpdated for internal diff). + Vim checks the pattern against the name of + the current buffer as with FilterWritePre. + Not triggered when 'shelltemp' is off. + *FilterWritePre* +FilterWritePre Before writing a file for a filter command or + making a diff with an external diff. + Vim checks the pattern against the name of + the current buffer, not the name of the + temporary file that is the output of the + filter command. + Not triggered when 'shelltemp' is off. + *FocusGained* +FocusGained When Vim got input focus. Only for the GUI + version and a few console versions where this + can be detected. + *FocusLost* +FocusLost When Vim lost input focus. Only for the GUI + version and a few console versions where this + can be detected. May also happen when a + dialog pops up. + *FuncUndefined* +FuncUndefined When a user function is used but it isn't + defined. Useful for defining a function only + 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 + opening the window. It is triggered before + VimEnter when using gvim. Can be used to + position the window from a .gvimrc file: > + :autocmd GUIEnter * winpos 100 50 +< *GUIFailed* +GUIFailed After starting the GUI failed. Vim may + continue to run in the terminal, if possible + (only on Unix and alikes, when connecting the + X server fails). You may want to quit Vim: > + :autocmd GUIFailed * qall +< *InsertChange* +InsertChange When typing <Insert> while in Insert or + Replace mode. The |v:insertmode| variable + indicates the new mode. + Be careful not to move the cursor or do + anything else that the user does not expect. + *InsertCharPre* +InsertCharPre When a character is typed in Insert mode, + before inserting the char. + The |v:char| variable indicates the char typed + and can be changed during the event to insert + a different character. When |v:char| is set + to more than one character this text is + inserted literally. + It is not allowed to change the text |textlock|. + The event is not triggered when 'paste' is + set. {only with the +eval feature} + *InsertEnter* +InsertEnter Just before starting Insert mode. Also for + Replace mode and Virtual Replace mode. The + |v:insertmode| variable indicates the mode. + Be careful not to do anything else that the + user does not expect. + The cursor is restored afterwards. If you do + not want that set |v:char| to a non-empty + string. + *InsertLeave* +InsertLeave When leaving Insert mode. Also when using + CTRL-O |i_CTRL-O|. But not for |i_CTRL-C|. + *MenuPopup* +MenuPopup Just before showing the popup menu (under the + right mouse button). Useful for adjusting the + menu for what is under the cursor or mouse + pointer. + The pattern is matched against one or two + characters representing the mode: + n Normal + v Visual + o Operator-pending + i Insert + c Command line + tl Terminal + *OptionSet* +OptionSet After setting an option. The pattern is + matched against the long option name. + The |v:option_old| variable indicates the + old option value, |v:option_new| variable + indicates the newly set value, the + |v:option_type| variable indicates whether + it's global or local scoped and |<amatch>| + indicates what option has been set. + + Is not triggered on startup and for the 'key' + option for obvious reasons. + + Usage example: Check for the existence of the + directory in the 'backupdir' and 'undodir' + options, create the directory if it doesn't + exist yet. + + Note: It's a bad idea to reset an option + during this autocommand, this may break a + plugin. You can always use `:noa` to prevent + triggering this autocommand. + + When using |:set| in the autocommand the event + is not triggered again. + + *QuickFixCmdPre* +QuickFixCmdPre Before a quickfix command is run (|:make|, + |:lmake|, |:grep|, |:lgrep|, |:grepadd|, + |:lgrepadd|, |:vimgrep|, |:lvimgrep|, + |:vimgrepadd|, |:lvimgrepadd|, |:cscope|, + |:cfile|, |:cgetfile|, |:caddfile|, |:lfile|, + |:lgetfile|, |:laddfile|, |:helpgrep|, + |:lhelpgrep|, |:cexpr|, |:cgetexpr|, + |:caddexpr|, |:cbuffer|, |:cgetbuffer|, + |:caddbuffer|). + The pattern is matched against the command + being run. When |:grep| is used but 'grepprg' + is set to "internal" it still matches "grep". + This command cannot be used to set the + 'makeprg' and 'grepprg' variables. + If this command causes an error, the quickfix + command is not executed. + *QuickFixCmdPost* +QuickFixCmdPost Like QuickFixCmdPre, but after a quickfix + command is run, before jumping to the first + location. For |:cfile| and |:lfile| commands + it is run after error file is read and before + moving to the first error. + See |QuickFixCmdPost-example|. + *QuitPre* +QuitPre When using `:quit`, `:wq` or `:qall`, before + deciding whether it closes the current window + or quits Vim. Can be used to close any + non-essential window if the current window is + the last ordinary window. + Also see |ExitPre|. + *RemoteReply* +RemoteReply When a reply from a Vim that functions as + server was received |server2client()|. The + pattern is matched against the {serverid}. + <amatch> is equal to the {serverid} from which + the reply was sent, and <afile> is the actual + reply string. + Note that even if an autocommand is defined, + the reply should be read with |remote_read()| + to consume it. + *SessionLoadPost* +SessionLoadPost After loading the session file created using + the |:mksession| command. + *ShellCmdPost* +ShellCmdPost After executing a shell command with |:!cmd|, + |:shell|, |:make| and |:grep|. Can be used to + check for any changed files. + *ShellFilterPost* +ShellFilterPost After executing a shell command with + ":{range}!cmd", ":w !cmd" or ":r !cmd". + Can be used to check for any changed files. + *SourcePre* +SourcePre Before sourcing a Vim script. |:source| + <afile> is the name of the file being sourced. + *SourcePost* +SourcePost After sourcing a Vim script. |:source| + <afile> is the name of the file being sourced. + Not triggered when sourcing was interrupted. + Also triggered after a SourceCmd autocommand + was triggered. + *SourceCmd* +SourceCmd When sourcing a Vim script. |:source| + <afile> is the name of the file being sourced. + The autocommand must source this file. + |Cmd-event| + *SpellFileMissing* +SpellFileMissing When trying to load a spell checking file and + it can't be found. The pattern is matched + against the language. <amatch> is the + language, 'encoding' also matters. See + |spell-SpellFileMissing|. + *StdinReadPost* +StdinReadPost After reading from the stdin into the buffer, + before executing the modelines. Only used + when the "-" argument was used when Vim was + started |--|. + *StdinReadPre* +StdinReadPre Before reading from stdin into the buffer. + Only used when the "-" argument was used when + Vim was started |--|. + *SwapExists* +SwapExists Detected an existing swap file when starting + to edit a file. Only when it is possible to + select a way to handle the situation, when Vim + would ask the user what to do. + The |v:swapname| variable holds the name of + the swap file found, <afile> the file being + edited. |v:swapcommand| may contain a command + to be executed in the opened file. + The commands should set the |v:swapchoice| + variable to a string with one character to + tell Vim what should be done next: + 'o' open read-only + 'e' edit the file anyway + 'r' recover + 'd' delete the swap file + 'q' quit, don't edit the file + 'a' abort, like hitting CTRL-C + When set to an empty string the user will be + asked, as if there was no SwapExists autocmd. + *E812* + It is not allowed to change to another buffer, + change a buffer name or change directory + here. + {only available with the +eval feature} + *Syntax* +Syntax When the 'syntax' option has been set. The + pattern is matched against the syntax name. + <afile> can be used for the name of the file + where this option was set, and <amatch> for + the new value of 'syntax'. + See |:syn-on|. + *TabClosed* +TabClosed After closing a tab page. + *TabEnter* +TabEnter Just after entering a tab page. |tab-page| + After triggering the WinEnter and before + triggering the BufEnter event. + *TabLeave* +TabLeave Just before leaving a tab page. |tab-page| + A WinLeave event will have been triggered + first. + *TabNew* +TabNew When a tab page was created. |tab-page| + A WinEnter event will have been triggered + first, TabEnter follows. + *TermChanged* +TermChanged After the value of 'term' has changed. Useful + for re-loading the syntax file to update the + colors, fonts and other terminal-dependent + settings. Executed for all loaded buffers. + *TerminalOpen* +TerminalOpen Just after a terminal buffer was created, with + `:terminal` or |term_start()|. This event is + triggered even if the buffer is created + without a window, with the ++hidden option. + *TermResponse* +TermResponse After the response to |t_RV| is received from + the terminal. The value of |v:termresponse| + can be used to do things depending on the + terminal version. Note that this event may be + triggered halfway executing another event, + especially if file I/O, a shell command or + anything else that takes time is involved. + *TextChanged* +TextChanged After a change was made to the text in the + current buffer in Normal mode. That is after + |b:changedtick| has changed (also when that + happened before the TextChanged autocommand + was defined). + Not triggered when there is typeahead or when + an operator is pending. + Careful: This is triggered very often, don't + do anything that the user does not expect or + that is slow. + *TextChangedI* +TextChangedI After a change was made to the text in the + current buffer in Insert mode. + Not triggered when the popup menu is visible. + Otherwise the same as TextChanged. + *TextChangedP* +TextChangedP After a change was made to the text in the + current buffer in Insert mode, only when the + popup menu is visible. Otherwise the same as + TextChanged. + *TextYankPost* +TextYankPost After text has been yanked or deleted in the + current buffer. The following values of + |v:event| can be used to determine the operation + that triggered this autocmd: + operator The operation performed. + regcontents Text that was stored in the + register, as a list of lines, + like with: > + getreg(r, 1, 1) +< regname Name of the |register| or + empty string for the unnamed + register. + regtype Type of the register, see + |getregtype()|. + Not triggered when |quote_| is used nor when + called recursively. + It is not allowed to change the buffer text, + see |textlock|. + {only when compiled with the +eval feature} + *User* +User Never executed automatically. To be used for + autocommands that are only executed with + ":doautocmd". + Note that when `:doautocmd User MyEvent` is + used while there are no matching autocommands, + you will get an error. If you don't want + that, define a dummy autocommand yourself. + *UserGettingBored* +UserGettingBored When the user presses the same key 42 times. + Just kidding! :-) + *VimEnter* +VimEnter After doing all the startup stuff, including + loading .vimrc files, executing the "-c cmd" + arguments, creating all windows and loading + the buffers in them. + Just before this event is triggered the + |v:vim_did_enter| variable is set, so that you + can do: > + if v:vim_did_enter + call s:init() + else + au VimEnter * call s:init() + endif +< *VimLeave* +VimLeave Before exiting Vim, just after writing the + .viminfo file. Executed only once, like + VimLeavePre. + To detect an abnormal exit use |v:dying|. + When v:dying is 2 or more this event is not + triggered. + *VimLeavePre* +VimLeavePre Before exiting Vim, just before writing the + .viminfo file. This is executed only once, + if there is a match with the name of what + happens to be the current buffer when exiting. + Mostly useful with a "*" pattern. > + :autocmd VimLeavePre * call CleanupStuff() +< To detect an abnormal exit use |v:dying|. + When v:dying is 2 or more this event is not + triggered. + *VimResized* +VimResized After the Vim window was resized, thus 'lines' + and/or 'columns' changed. Not when starting + up though. + *WinEnter* +WinEnter After entering another window. Not done for + the first window, when Vim has just started. + Useful for setting the window height. + If the window is for another buffer, Vim + executes the BufEnter autocommands after the + WinEnter autocommands. + Note: For split and tabpage commands the + WinEnter event is triggered after the split + or tab command but before the file is loaded. + + *WinLeave* +WinLeave Before leaving a window. If the window to be + entered next is for a different buffer, Vim + executes the BufLeave autocommands before the + WinLeave autocommands (but not for ":new"). + Not used for ":qa" or ":q" when exiting Vim. + + *WinNew* +WinNew When a new window was created. Not done for + the first window, when Vim has just started. + Before a WinEnter event. + +============================================================================== +6. Patterns *autocmd-patterns* *{pat}* + +The {pat} argument can be a comma separated list. This works as if the +command was given with each pattern separately. Thus this command: > + :autocmd BufRead *.txt,*.info set et +Is equivalent to: > + :autocmd BufRead *.txt set et + :autocmd BufRead *.info set et + +The file pattern {pat} is tested for a match against the file name in one of +two ways: +1. When there is no '/' in the pattern, Vim checks for a match against only + the tail part of the file name (without its leading directory path). +2. When there is a '/' in the pattern, Vim checks for a match against both the + short file name (as you typed it) and the full file name (after expanding + it to a full path and resolving symbolic links). + +The special pattern <buffer> or <buffer=N> is used for buffer-local +autocommands |autocmd-buflocal|. This pattern is not matched against the name +of a buffer. + +Examples: > + :autocmd BufRead *.txt set et +Set the 'et' option for all text files. > + + :autocmd BufRead /vim/src/*.c set cindent +Set the 'cindent' option for C files in the /vim/src directory. > + + :autocmd BufRead /tmp/*.c set ts=5 +If you have a link from "/tmp/test.c" to "/home/nobody/vim/src/test.c", and +you start editing "/tmp/test.c", this autocommand will match. + +Note: To match part of a path, but not from the root directory, use a '*' as +the first character. Example: > + :autocmd BufRead */doc/*.txt set tw=78 +This autocommand will for example be executed for "/tmp/doc/xx.txt" and +"/usr/home/piet/doc/yy.txt". The number of directories does not matter here. + + +The file name that the pattern is matched against is after expanding +wildcards. Thus if you issue this command: > + :e $ROOTDIR/main.$EXT +The argument is first expanded to: > + /usr/root/main.py +Before it's matched with the pattern of the autocommand. Careful with this +when using events like FileReadCmd, the value of <amatch> may not be what you +expect. + + +Environment variables can be used in a pattern: > + :autocmd BufRead $VIMRUNTIME/doc/*.txt set expandtab +And ~ can be used for the home directory (if $HOME is defined): > + :autocmd BufWritePost ~/.vimrc so ~/.vimrc + :autocmd BufRead ~archive/* set readonly +The environment variable is expanded when the autocommand is defined, not when +the autocommand is executed. This is different from the command! + + *file-pattern* +The pattern is interpreted like mostly used in file names: + * matches any sequence of characters; Unusual: includes path + separators + ? matches any single character + \? matches a '?' + . matches a '.' + ~ matches a '~' + , separates patterns + \, matches a ',' + { } like \( \) in a |pattern| + , inside { }: like \| in a |pattern| + \} literal } + \{ literal { + \\\{n,m\} like \{n,m} in a |pattern| + \ special meaning like in a |pattern| + [ch] matches 'c' or 'h' + [^ch] match any character but 'c' and 'h' + +Note that for all systems the '/' character is used for path separator (even +MS-DOS and OS/2). This was done because the backslash is difficult to use +in a pattern and to make the autocommands portable across different systems. + +It is possible to use |pattern| items, but they may not work as expected, +because of the translation done for the above. + + *autocmd-changes* +Matching with the pattern is done when an event is triggered. Changing the +buffer name in one of the autocommands, or even deleting the buffer, does not +change which autocommands will be executed. Example: > + + au BufEnter *.foo bdel + au BufEnter *.foo set modified + +This will delete the current buffer and then set 'modified' in what has become +the current buffer instead. Vim doesn't take into account that "*.foo" +doesn't match with that buffer name. It matches "*.foo" with the name of the +buffer at the moment the event was triggered. + +However, buffer-local autocommands will not be executed for a buffer that has +been wiped out with |:bwipe|. After deleting the buffer with |:bdel| the +buffer actually still exists (it becomes unlisted), thus the autocommands are +still executed. + +============================================================================== +7. Buffer-local autocommands *autocmd-buflocal* *autocmd-buffer-local* + *<buffer=N>* *<buffer=abuf>* *E680* + +Buffer-local autocommands are attached to a specific buffer. They are useful +if the buffer does not have a name and when the name does not match a specific +pattern. But it also means they must be explicitly added to each buffer. + +Instead of a pattern buffer-local autocommands use one of these forms: + <buffer> current buffer + <buffer=99> buffer number 99 + <buffer=abuf> using <abuf> (only when executing autocommands) + |<abuf>| + +Examples: > + :au CursorHold <buffer> echo 'hold' + :au CursorHold <buffer=33> echo 'hold' + :au BufNewFile * au CursorHold <buffer=abuf> echo 'hold' + +All the commands for autocommands also work with buffer-local autocommands, +simply use the special string instead of the pattern. Examples: > + :au! * <buffer> " remove buffer-local autocommands for + " current buffer + :au! * <buffer=33> " remove buffer-local autocommands for + " buffer #33 + :bufdo :au! CursorHold <buffer> " remove autocmd for given event for all + " buffers + :au * <buffer> " list buffer-local autocommands for + " current buffer + +Note that when an autocommand is defined for the current buffer, it is stored +with the buffer number. Thus it uses the form "<buffer=12>", where 12 is the +number of the current buffer. You will see this when listing autocommands, +for example. + +To test for presence of buffer-local autocommands use the |exists()| function +as follows: > + :if exists("#CursorHold#<buffer=12>") | ... | endif + :if exists("#CursorHold#<buffer>") | ... | endif " for current buffer + +When a buffer is wiped out its buffer-local autocommands are also gone, of +course. Note that when deleting a buffer, e.g., with ":bdel", it is only +unlisted, the autocommands are still present. In order to see the removal of +buffer-local autocommands: > + :set verbose=6 + +It is not possible to define buffer-local autocommands for a non-existent +buffer. + +============================================================================== +8. Groups *autocmd-groups* + +Autocommands can be put together in a group. This is useful for removing or +executing a group of autocommands. For example, all the autocommands for +syntax highlighting are put in the "highlight" group, to be able to execute +":doautoall highlight BufRead" when the GUI starts. + +When no specific group is selected, Vim uses the default group. The default +group does not have a name. You cannot execute the autocommands from the +default group separately; you can execute them only by executing autocommands +for all groups. + +Normally, when executing autocommands automatically, Vim uses the autocommands +for all groups. The group only matters when executing autocommands with +":doautocmd" or ":doautoall", or when defining or deleting autocommands. + +The group name can contain any characters except white space. The group name +"end" is reserved (also in uppercase). + +The group name is case sensitive. Note that this is different from the event +name! + + *:aug* *:augroup* +:aug[roup] {name} Define the autocmd group name for the + following ":autocmd" commands. The name "end" + or "END" selects the default group. + To avoid confusion, the name should be + different from existing {event} names, as this + most likely will not do what you intended. + + *:augroup-delete* *E367* *W19* *E936* +:aug[roup]! {name} Delete the autocmd group {name}. Don't use + this if there is still an autocommand using + this group! You will get a warning if doing + it anyway. when the group is the current group + you will get error E936. + +To enter autocommands for a specific group, use this method: +1. Select the group with ":augroup {name}". +2. Delete any old autocommands with ":au!". +3. Define the autocommands. +4. Go back to the default group with "augroup END". + +Example: > + :augroup uncompress + : au! + : au BufEnter *.gz %!gunzip + :augroup END + +This prevents having the autocommands defined twice (e.g., after sourcing the +.vimrc file again). + +============================================================================== +9. Executing autocommands *autocmd-execute* + +Vim can also execute Autocommands non-automatically. This is useful if you +have changed autocommands, or when Vim has executed the wrong autocommands +(e.g., the file pattern match was wrong). + +Note that the 'eventignore' option applies here too. Events listed in this +option will not cause any commands to be executed. + + *:do* *:doau* *:doautocmd* *E217* +:do[autocmd] [<nomodeline>] [group] {event} [fname] + Apply the autocommands matching [fname] (default: + current file name) for {event} to the current buffer. + You can use this when the current file name does not + match the right pattern, after changing settings, or + to execute autocommands for a certain event. + It's possible to use this inside an autocommand too, + so you can base the autocommands for one extension on + another extension. Example: > + :au BufEnter *.cpp so ~/.vimrc_cpp + :au BufEnter *.cpp doau BufEnter x.c +< Be careful to avoid endless loops. See + |autocmd-nested|. + + When the [group] argument is not given, Vim executes + the autocommands for all groups. When the [group] + argument is included, Vim executes only the matching + autocommands for that group. Note: if you use an + undefined group name, Vim gives you an error message. + *<nomodeline>* + After applying the autocommands the modelines are + processed, so that their settings overrule the + settings from autocommands, like what happens when + editing a file. This is skipped when the <nomodeline> + argument is present. You probably want to use + <nomodeline> for events that are not used when loading + a buffer, such as |User|. + Processing modelines is also skipped when no + matching autocommands were executed. + + *:doautoa* *:doautoall* +:doautoa[ll] [<nomodeline>] [group] {event} [fname] + Like ":doautocmd", but apply the autocommands to each + loaded buffer. Note that [fname] is used to select + the autocommands, not the buffers to which they are + applied. + Careful: Don't use this for autocommands that delete a + buffer, change to another buffer or change the + contents of a buffer; the result is unpredictable. + This command is intended for autocommands that set + options, change highlighting, and things like that. + +============================================================================== +10. Using autocommands *autocmd-use* + +For WRITING FILES there are four possible sets of events. Vim uses only one +of these sets for a write command: + +BufWriteCmd BufWritePre BufWritePost writing the whole buffer + FilterWritePre FilterWritePost writing to filter temp file +FileAppendCmd FileAppendPre FileAppendPost appending to a file +FileWriteCmd FileWritePre FileWritePost any other file write + +When there is a matching "*Cmd" autocommand, it is assumed it will do the +writing. No further writing is done and the other events are not triggered. +|Cmd-event| + +Note that the *WritePost commands should undo any changes to the buffer that +were caused by the *WritePre commands; otherwise, writing the file will have +the side effect of changing the buffer. + +Before executing the autocommands, the buffer from which the lines are to be +written temporarily becomes the current buffer. Unless the autocommands +change the current buffer or delete the previously current buffer, the +previously current buffer is made the current buffer again. + +The *WritePre and *AppendPre autocommands must not delete the buffer from +which the lines are to be written. + +The '[ and '] marks have a special position: +- Before the *ReadPre event the '[ mark is set to the line just above where + the new lines will be inserted. +- Before the *ReadPost event the '[ mark is set to the first line that was + just read, the '] mark to the last line. +- Before executing the *WriteCmd, *WritePre and *AppendPre autocommands the '[ + mark is set to the first line that will be written, the '] mark to the last + line. +Careful: '[ and '] change when using commands that change the buffer. + +In commands which expect a file name, you can use "<afile>" for the file name +that is being read |:<afile>| (you can also use "%" for the current file +name). "<abuf>" can be used for the buffer number of the currently effective +buffer. This also works for buffers that don't have a name. But it doesn't +work for files without a buffer (e.g., with ":r file"). + + *gzip-example* +Examples for reading and writing compressed files: > + :augroup gzip + : autocmd! + : autocmd BufReadPre,FileReadPre *.gz set bin + : autocmd BufReadPost,FileReadPost *.gz '[,']!gunzip + : autocmd BufReadPost,FileReadPost *.gz set nobin + : autocmd BufReadPost,FileReadPost *.gz execute ":doautocmd BufReadPost " . expand("%:r") + : autocmd BufWritePost,FileWritePost *.gz !mv <afile> <afile>:r + : autocmd BufWritePost,FileWritePost *.gz !gzip <afile>:r + + : autocmd FileAppendPre *.gz !gunzip <afile> + : autocmd FileAppendPre *.gz !mv <afile>:r <afile> + : autocmd FileAppendPost *.gz !mv <afile> <afile>:r + : autocmd FileAppendPost *.gz !gzip <afile>:r + :augroup END + +The "gzip" group is used to be able to delete any existing autocommands with +":autocmd!", for when the file is sourced twice. + +("<afile>:r" is the file name without the extension, see |:_%:|) + +The commands executed for the BufNewFile, BufRead/BufReadPost, BufWritePost, +FileAppendPost and VimLeave events do not set or reset the changed flag of the +buffer. When you decompress the buffer with the BufReadPost autocommands, you +can still exit with ":q". When you use ":undo" in BufWritePost to undo the +changes made by BufWritePre commands, you can still do ":q" (this also makes +"ZZ" work). If you do want the buffer to be marked as modified, set the +'modified' option. + +To execute Normal mode commands from an autocommand, use the ":normal" +command. Use with care! If the Normal mode command is not finished, the user +needs to type characters (e.g., after ":normal m" you need to type a mark +name). + +If you want the buffer to be unmodified after changing it, reset the +'modified' option. This makes it possible to exit the buffer with ":q" +instead of ":q!". + + *autocmd-nested* *E218* +By default, autocommands do not nest. If you use ":e" or ":w" in an +autocommand, Vim does not execute the BufRead and BufWrite autocommands for +those commands. If you do want this, use the "nested" flag for those commands +in which you want nesting. For example: > + :autocmd FileChangedShell *.c nested e! +The nesting is limited to 10 levels to get out of recursive loops. + +It's possible to use the ":au" command in an autocommand. This can be a +self-modifying command! This can be useful for an autocommand that should +execute only once. + +If you want to skip autocommands for one command, use the |:noautocmd| command +modifier or the 'eventignore' option. + +Note: When reading a file (with ":read file" or with a filter command) and the +last line in the file does not have an <EOL>, Vim remembers this. At the next +write (with ":write file" or with a filter command), if the same line is +written again as the last line in a file AND 'binary' is set, Vim does not +supply an <EOL>. This makes a filter command on the just read lines write the +same file as was read, and makes a write command on just filtered lines write +the same file as was read from the filter. For example, another way to write +a compressed file: > + + :autocmd FileWritePre *.gz set bin|'[,']!gzip + :autocmd FileWritePost *.gz undo|set nobin +< + *autocommand-pattern* +You can specify multiple patterns, separated by commas. Here are some +examples: > + + :autocmd BufRead * set tw=79 nocin ic infercase fo=2croq + :autocmd BufRead .letter set tw=72 fo=2tcrq + :autocmd BufEnter .letter set dict=/usr/lib/dict/words + :autocmd BufLeave .letter set dict= + :autocmd BufRead,BufNewFile *.c,*.h set tw=0 cin noic + :autocmd BufEnter *.c,*.h abbr FOR for (i = 0; i < 3; ++i)<CR>{<CR>}<Esc>O + :autocmd BufLeave *.c,*.h unabbr FOR + +For makefiles (makefile, Makefile, imakefile, makefile.unix, etc.): > + + :autocmd BufEnter ?akefile* set include=^s\=include + :autocmd BufLeave ?akefile* set include& + +To always start editing C files at the first function: > + + :autocmd BufRead *.c,*.h 1;/^{ + +Without the "1;" above, the search would start from wherever the file was +entered, rather than from the start of the file. + + *skeleton* *template* +To read a skeleton (template) file when opening a new file: > + + :autocmd BufNewFile *.c 0r ~/vim/skeleton.c + :autocmd BufNewFile *.h 0r ~/vim/skeleton.h + :autocmd BufNewFile *.java 0r ~/vim/skeleton.java + +To insert the current date and time in a *.html file when writing it: > + + :autocmd BufWritePre,FileWritePre *.html ks|call LastMod()|'s + :fun LastMod() + : if line("$") > 20 + : let l = 20 + : else + : let l = line("$") + : endif + : exe "1," . l . "g/Last modified: /s/Last modified: .*/Last modified: " . + : \ strftime("%Y %b %d") + :endfun + +You need to have a line "Last modified: <date time>" in the first 20 lines +of the file for this to work. Vim replaces <date time> (and anything in the +same line after it) with the current date and time. Explanation: + ks mark current position with mark 's' + call LastMod() call the LastMod() function to do the work + 's return the cursor to the old position +The LastMod() function checks if the file is shorter than 20 lines, and then +uses the ":g" command to find lines that contain "Last modified: ". For those +lines the ":s" command is executed to replace the existing date with the +current one. The ":execute" command is used to be able to use an expression +for the ":g" and ":s" commands. The date is obtained with the strftime() +function. You can change its argument to get another date string. + +When entering :autocmd on the command-line, completion of events and command +names may be done (with <Tab>, CTRL-D, etc.) where appropriate. + +Vim executes all matching autocommands in the order that you specify them. +It is recommended that your first autocommand be used for all files by using +"*" as the file pattern. This means that you can define defaults you like +here for any settings, and if there is another matching autocommand it will +override these. But if there is no other matching autocommand, then at least +your default settings are recovered (if entering this file from another for +which autocommands did match). Note that "*" will also match files starting +with ".", unlike Unix shells. + + *autocmd-searchpat* +Autocommands do not change the current search patterns. Vim saves the current +search patterns before executing autocommands then restores them after the +autocommands finish. This means that autocommands do not affect the strings +highlighted with the 'hlsearch' option. Within autocommands, you can still +use search patterns normally, e.g., with the "n" command. +If you want an autocommand to set the search pattern, such that it is used +after the autocommand finishes, use the ":let @/ =" command. +The search-highlighting cannot be switched off with ":nohlsearch" in an +autocommand. Use the 'h' flag in the 'viminfo' option to disable search- +highlighting when starting Vim. + + *Cmd-event* +When using one of the "*Cmd" events, the matching autocommands are expected to +do the file reading, writing or sourcing. This can be used when working with +a special kind of file, for example on a remote system. +CAREFUL: If you use these events in a wrong way, it may have the effect of +making it impossible to read or write the matching files! Make sure you test +your autocommands properly. Best is to use a pattern that will never match a +normal file name, for example "ftp://*". + +When defining a BufReadCmd it will be difficult for Vim to recover a crashed +editing session. When recovering from the original file, Vim reads only those +parts of a file that are not found in the swap file. Since that is not +possible with a BufReadCmd, use the |:preserve| command to make sure the +original file isn't needed for recovery. You might want to do this only when +you expect the file to be modified. + +For file read and write commands the |v:cmdarg| variable holds the "++enc=" +and "++ff=" argument that are effective. These should be used for the command +that reads/writes the file. The |v:cmdbang| variable is one when "!" was +used, zero otherwise. + +See the $VIMRUNTIME/plugin/netrwPlugin.vim for examples. + +============================================================================== +11. Disabling autocommands *autocmd-disable* + +To disable autocommands for some time use the 'eventignore' option. Note that +this may cause unexpected behavior, make sure you restore 'eventignore' +afterwards, using a |:try| block with |:finally|. + + *:noautocmd* *:noa* +To disable autocommands for just one command use the ":noautocmd" command +modifier. This will set 'eventignore' to "all" for the duration of the +following command. Example: > + + :noautocmd w fname.gz + +This will write the file without triggering the autocommands defined by the +gzip plugin. + + + vim:tw=78:ts=8:noet:ft=help:norl: |