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diff --git a/runtime/doc/repeat.txt b/runtime/doc/repeat.txt new file mode 100644 index 0000000..195a202 --- /dev/null +++ b/runtime/doc/repeat.txt @@ -0,0 +1,1076 @@ +*repeat.txt* For Vim version 8.2. Last change: 2021 Jan 23 + + + VIM REFERENCE MANUAL by Bram Moolenaar + + +Repeating commands, Vim scripts and debugging *repeating* + +Chapter 26 of the user manual introduces repeating |usr_26.txt|. + +1. Single repeats |single-repeat| +2. Multiple repeats |multi-repeat| +3. Complex repeats |complex-repeat| +4. Using Vim scripts |using-scripts| +5. Using Vim packages |packages| +6. Creating Vim packages |package-create| +7. Debugging scripts |debug-scripts| +8. Profiling |profiling| + +============================================================================== +1. Single repeats *single-repeat* + + *.* +. Repeat last change, with count replaced with [count]. + Also repeat a yank command, when the 'y' flag is + included in 'cpoptions'. Does not repeat a + command-line command. + +Simple changes can be repeated with the "." command. Without a count, the +count of the last change is used. If you enter a count, it will replace the +last one. |v:count| and |v:count1| will be set. + +If the last change included a specification of a numbered register, the +register number will be incremented. See |redo-register| for an example how +to use this. + +Note that when repeating a command that used a Visual selection, the same SIZE +of area is used, see |visual-repeat|. + + *@:* +@: Repeat last command-line [count] times. + {not available when compiled without the + |+cmdline_hist| feature} + + +============================================================================== +2. Multiple repeats *multi-repeat* + + *:g* *:global* *E148* +:[range]g[lobal]/{pattern}/[cmd] + Execute the Ex command [cmd] (default ":p") on the + lines within [range] where {pattern} matches. + +:[range]g[lobal]!/{pattern}/[cmd] + Execute the Ex command [cmd] (default ":p") on the + lines within [range] where {pattern} does NOT match. + + *:v* *:vglobal* +:[range]v[global]/{pattern}/[cmd] + Same as :g!. + +Instead of the '/' which surrounds the {pattern}, you can use any other +single byte character, but not an alphabetic character, '\', '"' or '|'. +This is useful if you want to include a '/' in the search pattern or +replacement string. + +For the definition of a pattern, see |pattern|. + +NOTE [cmd] may contain a range; see |collapse| and |edit-paragraph-join| for +examples. + +The global commands work by first scanning through the [range] lines and +marking each line where a match occurs (for a multi-line pattern, only the +start of the match matters). +In a second scan the [cmd] is executed for each marked line, as if the cursor +was in that line. For ":v" and ":g!" the command is executed for each not +marked line. If a line is deleted its mark disappears. +The default for [range] is the whole buffer (1,$). Use "CTRL-C" to interrupt +the command. If an error message is given for a line, the command for that +line is aborted and the global command continues with the next marked or +unmarked line. + *E147* +When the command is used recursively, it only works on one line. Giving a +range is then not allowed. This is useful to find all lines that match a +pattern and do not match another pattern: > + :g/found/v/notfound/{cmd} +This first finds all lines containing "found", but only executes {cmd} when +there is no match for "notfound". + +To execute a non-Ex command, you can use the `:normal` command: > + :g/pat/normal {commands} +Make sure that {commands} ends with a whole command, otherwise Vim will wait +for you to type the rest of the command for each match. The screen will not +have been updated, so you don't know what you are doing. See |:normal|. + +The undo/redo command will undo/redo the whole global command at once. +The previous context mark will only be set once (with "''" you go back to +where the cursor was before the global command). + +The global command sets both the last used search pattern and the last used +substitute pattern (this is vi compatible). This makes it easy to globally +replace a string: + :g/pat/s//PAT/g +This replaces all occurrences of "pat" with "PAT". The same can be done with: + :%s/pat/PAT/g +Which is two characters shorter! + +When using "global" in Ex mode, a special case is using ":visual" as a +command. This will move to a matching line, go to Normal mode to let you +execute commands there until you use |Q| to return to Ex mode. This will be +repeated for each matching line. While doing this you cannot use ":global". +To abort this type CTRL-C twice. + +============================================================================== +3. Complex repeats *complex-repeat* + + *q* *recording* +q{0-9a-zA-Z"} Record typed characters into register {0-9a-zA-Z"} + (uppercase to append). The 'q' command is disabled + while executing a register, and it doesn't work inside + a mapping and |:normal|. + + Note: If the register being used for recording is also + used for |y| and |p| the result is most likely not + what is expected, because the put will paste the + recorded macro and the yank will overwrite the + recorded macro. + + Note: The recording happens while you type, replaying + the register happens as if the keys come from a + mapping. This matters, for example, for undo, which + only syncs when commands were typed. + +q Stops recording. (Implementation note: The 'q' that + stops recording is not stored in the register, unless + it was the result of a mapping) + + *@* +@{0-9a-z".=*+} Execute the contents of register {0-9a-z".=*+} [count] + times. Note that register '%' (name of the current + file) and '#' (name of the alternate file) cannot be + used. + The register is executed like a mapping, that means + that the difference between 'wildchar' and 'wildcharm' + applies, and undo might not be synced in the same way. + For "@=" you are prompted to enter an expression. The + result of the expression is then executed. + See also |@:|. + + *@@* *E748* +@@ Repeat the previous @{0-9a-z":*} [count] times. + +:[addr]*{0-9a-z".=+} *:@* *:star* +:[addr]@{0-9a-z".=*+} Execute the contents of register {0-9a-z".=*+} as an Ex + command. First set cursor at line [addr] (default is + current line). When the last line in the register does + not have a <CR> it will be added automatically when + the 'e' flag is present in 'cpoptions'. + Note that the ":*" command is only recognized when the + '*' flag is present in 'cpoptions'. This is NOT the + default when 'nocompatible' is used. + For ":@=" the last used expression is used. The + result of evaluating the expression is executed as an + Ex command. + Mappings are not recognized in these commands. + When the |line-continuation| character (\) is present + at the beginning of a line in a linewise register, + then it is combined with the previous line. This is + useful for yanking and executing parts of a Vim + script. + Future: Will execute the register for each line in the + address range. + + *:@:* +:[addr]@: Repeat last command-line. First set cursor at line + [addr] (default is current line). + +:[addr]@ *:@@* +:[addr]@@ Repeat the previous :@{register}. First set cursor at + line [addr] (default is current line). + +============================================================================== +4. Using Vim scripts *using-scripts* + +For writing a Vim script, see chapter 41 of the user manual |usr_41.txt|. + + *:so* *:source* *load-vim-script* +:so[urce] {file} Read Ex commands from {file}. These are commands that + start with a ":". + Triggers the |SourcePre| autocommand. + *:source!* +:so[urce]! {file} Read Vim commands from {file}. These are commands + that are executed from Normal mode, like you type + them. + When used after |:global|, |:argdo|, |:windo|, + |:bufdo|, in a loop or when another command follows + the display won't be updated while executing the + commands. + Cannot be used in the |sandbox|. + + *:ru* *:runtime* +:ru[ntime][!] [where] {file} .. + Read Ex commands from {file} in each directory given + by 'runtimepath' and/or 'packpath'. There is no error + for non-existing files. + + Example: > + :runtime syntax/c.vim + +< There can be multiple {file} arguments, separated by + spaces. Each {file} is searched for in the first + directory from 'runtimepath', then in the second + directory, etc. Use a backslash to include a space + inside {file} (although it's better not to use spaces + in file names, it causes trouble). + + When [!] is included, all found files are sourced. + When it is not included only the first found file is + sourced. + + When [where] is omitted only 'runtimepath' is used. + Other values: + START search under "start" in 'packpath' + OPT search under "opt" in 'packpath' + PACK search under "start" and "opt" in + 'packpath' + ALL first use 'runtimepath', then search + under "start" and "opt" in 'packpath' + + When {file} contains wildcards it is expanded to all + matching files. Example: > + :runtime! plugin/**/*.vim +< This is what Vim uses to load the plugin files when + starting up. This similar command: > + :runtime plugin/**/*.vim +< would source the first file only. + + When 'verbose' is one or higher, there is a message + when no file could be found. + When 'verbose' is two or higher, there is a message + about each searched file. + + *:pa* *:packadd* *E919* +:pa[ckadd][!] {name} Search for an optional plugin directory in 'packpath' + and source any plugin files found. The directory must + match: + pack/*/opt/{name} ~ + The directory is added to 'runtimepath' if it wasn't + there yet. + If the directory pack/*/opt/{name}/after exists it is + added at the end of 'runtimepath'. + + If loading packages from "pack/*/start" was skipped, + then this directory is searched first: + pack/*/start/{name} ~ + + Note that {name} is the directory name, not the name + of the .vim file. All the files matching the pattern + pack/*/opt/{name}/plugin/**/*.vim ~ + will be sourced. This allows for using subdirectories + below "plugin", just like with plugins in + 'runtimepath'. + + If the filetype detection was not enabled yet (this + is usually done with a "syntax enable" or "filetype + on" command in your .vimrc file), this will also look + for "{name}/ftdetect/*.vim" files. + + When the optional ! is added no plugin files or + ftdetect scripts are loaded, only the matching + directories are added to 'runtimepath'. This is + useful in your .vimrc. The plugins will then be + loaded during initialization, see |load-plugins|. + Note that for ftdetect scripts to be loaded + you will need to write `filetype plugin indent on` + AFTER all `packadd!` commands. + + Also see |pack-add|. + {only available when compiled with |+eval|} + + *:packl* *:packloadall* +:packl[oadall][!] Load all packages in the "start" directory under each + entry in 'packpath'. + + First all the directories found are added to + 'runtimepath', then the plugins found in the + directories are sourced. This allows for a plugin to + depend on something of another plugin, e.g. an + "autoload" directory. See |packload-two-steps| for + how this can be useful. + + This is normally done automatically during startup, + after loading your .vimrc file. With this command it + can be done earlier. + + Packages will be loaded only once. Using + `:packloadall` a second time will have no effect. + When the optional ! is added this command will load + packages even when done before. + + Note that when using `:packloadall` in the |vimrc| + file, the 'runtimepath' option is updated, and later + all plugins in 'runtimepath' will be loaded, which + means they are loaded again. Plugins are expected to + handle that. + + An error only causes sourcing the script where it + happens to be aborted, further plugins will be loaded. + See |packages|. + {only available when compiled with |+eval|} + +:scripte[ncoding] [encoding] *:scripte* *:scriptencoding* *E167* + Specify the character encoding used in the script. + The following lines will be converted from [encoding] + to the value of the 'encoding' option, if they are + different. Examples: > + scriptencoding iso-8859-5 + scriptencoding cp932 +< + When [encoding] is empty, no conversion is done. This + can be used to restrict conversion to a sequence of + lines: > + scriptencoding euc-jp + ... lines to be converted ... + scriptencoding + ... not converted ... + +< When conversion isn't supported by the system, there + is no error message and no conversion is done. When a + line can't be converted there is no error and the + original line is kept. + + Don't use "ucs-2" or "ucs-4", scripts cannot be in + these encodings (they would contain NUL bytes). + When a sourced script starts with a BOM (Byte Order + Mark) in utf-8 format Vim will recognize it, no need + to use ":scriptencoding utf-8" then. + + If you set the 'encoding' option in your |.vimrc|, + `:scriptencoding` must be placed after that. E.g.: > + set encoding=utf-8 + scriptencoding utf-8 +< + +:scriptv[ersion] {version} *:scriptv* *:scriptversion* + *E999* *E984* + Specify the version of Vim for the lines that follow + in the same file. Only applies at the toplevel of + sourced scripts, not inside functions. + + If {version} is higher than what the current Vim + version supports E999 will be given. You either need + to rewrite the script to make it work with an older + Vim version, or update Vim to a newer version. See + |vimscript-version| for what changed between versions. + +:vim9[script] [noclear] *:vim9* *:vim9script* + Marks a script file as containing |Vim9-script| + commands. Also see |vim9-namespace|. + Must be the first command in the file. + For [noclear] see |vim9-reload|. + Without the |+eval| feature this changes the syntax + for some commands. + + *:scr* *:scriptnames* +:scr[iptnames] List all sourced script names, in the order they were + first sourced. The number is used for the script ID + |<SID>|. + {not available when compiled without the |+eval| + feature} + +:scr[iptnames][!] {scriptId} *:script* + Edit script {scriptId}. Although ":scriptnames name" + works, using ":script name" is recommended. + When the current buffer can't be |abandon|ed and the ! + is not present, the command fails. + + *:fini* *:finish* *E168* +:fini[sh] Stop sourcing a script. Can only be used in a Vim + script file. This is a quick way to skip the rest of + the file. If it is used after a |:try| but before the + matching |:finally| (if present), the commands + following the ":finally" up to the matching |:endtry| + are executed first. This process applies to all + nested ":try"s in the script. The outermost ":endtry" + then stops sourcing the script. + +All commands and command sequences can be repeated by putting them in a named +register and then executing it. There are two ways to get the commands in the +register: +- Use the record command "q". You type the commands once, and while they are + being executed they are stored in a register. Easy, because you can see + what you are doing. If you make a mistake, "p"ut the register into the + file, edit the command sequence, and then delete it into the register + again. You can continue recording by appending to the register (use an + uppercase letter). +- Delete or yank the command sequence into the register. + +Often used command sequences can be put under a function key with the ':map' +command. + +An alternative is to put the commands in a file, and execute them with the +':source!' command. Useful for long command sequences. Can be combined with +the ':map' command to put complicated commands under a function key. + +The ':source' command reads Ex commands from a file line by line. You will +have to type any needed keyboard input. The ':source!' command reads from a +script file character by character, interpreting each character as if you +typed it. + +Example: When you give the ":!ls" command you get the |hit-enter| prompt. If +you ':source' a file with the line "!ls" in it, you will have to type the +<Enter> yourself. But if you ':source!' a file with the line ":!ls" in it, +the next characters from that file are read until a <CR> is found. You will +not have to type <CR> yourself, unless ":!ls" was the last line in the file. + +It is possible to put ':source[!]' commands in the script file, so you can +make a top-down hierarchy of script files. The ':source' command can be +nested as deep as the number of files that can be opened at one time (about +15). The ':source!' command can be nested up to 15 levels deep. + +You can use the "<sfile>" string (literally, this is not a special key) inside +of the sourced file, in places where a file name is expected. It will be +replaced by the file name of the sourced file. For example, if you have a +"other.vimrc" file in the same directory as your ".vimrc" file, you can source +it from your ".vimrc" file with this command: > + :source <sfile>:h/other.vimrc + +In script files terminal-dependent key codes are represented by +terminal-independent two character codes. This means that they can be used +in the same way on different kinds of terminals. The first character of a +key code is 0x80 or 128, shown on the screen as "~@". The second one can be +found in the list |key-notation|. Any of these codes can also be entered +with CTRL-V followed by the three digit decimal code. This does NOT work for +the <t_xx> termcap codes, these can only be used in mappings. + + *:source_crnl* *W15* +Win32: Files that are read with ":source" normally have <CR><NL> <EOL>s. +These always work. If you are using a file with <NL> <EOL>s (for example, a +file made on Unix), this will be recognized if 'fileformats' is not empty and +the first line does not end in a <CR>. This fails if the first line has +something like ":map <F1> :help^M", where "^M" is a <CR>. If the first line +ends in a <CR>, but following ones don't, you will get an error message, +because the <CR> from the first lines will be lost. + +Mac Classic: Files that are read with ":source" normally have <CR> <EOL>s. +These always work. If you are using a file with <NL> <EOL>s (for example, a +file made on Unix), this will be recognized if 'fileformats' is not empty and +the first line does not end in a <CR>. Be careful not to use a file with <NL> +linebreaks which has a <CR> in first line. + +On other systems, Vim expects ":source"ed files to end in a <NL>. These +always work. If you are using a file with <CR><NL> <EOL>s (for example, a +file made on MS-Windows), all lines will have a trailing <CR>. This may cause +problems for some commands (e.g., mappings). There is no automatic <EOL> +detection, because it's common to start with a line that defines a mapping +that ends in a <CR>, which will confuse the automaton. + + *line-continuation* +Long lines in a ":source"d Ex command script file can be split by inserting +a line continuation symbol "\" (backslash) at the start of the next line. +There can be white space before the backslash, which is ignored. + +Example: the lines > + :set comments=sr:/*,mb:*,el:*/, + \://, + \b:#, + \:%, + \n:>, + \fb:- +are interpreted as if they were given in one line: + :set comments=sr:/*,mb:*,el:*/,://,b:#,:%,n:>,fb:- + +All leading whitespace characters in the line before a backslash are ignored. +Note however that trailing whitespace in the line before it cannot be +inserted freely; it depends on the position where a command is split up +whether additional whitespace is allowed or not. + +When a space is required it's best to put it right after the backslash. A +space at the end of a line is hard to see and may be accidentally deleted. > + :syn match Comment + \ "very long regexp" + \ keepend + +There is a problem with the ":append" and ":insert" commands: > + :1append + \asdf + . +The backslash is seen as a line-continuation symbol, thus this results in the +command: > + :1appendasdf + . +To avoid this, add the 'C' flag to the 'cpoptions' option: > + :set cpo+=C + :1append + \asdf + . + :set cpo-=C + +Note that when the commands are inside a function, you need to add the 'C' +flag when defining the function, it is not relevant when executing it. > + :set cpo+=C + :function Foo() + :1append + \asdf + . + :endfunction + :set cpo-=C +< + *line-continuation-comment* +To add a comment in between the lines start with '"\ '. Notice the space +after the backslash. Example: > + let array = [ + "\ first entry comment + \ 'first', + "\ second entry comment + \ 'second', + \ ] + +Rationale: + Most programs work with a trailing backslash to indicate line + continuation. Using this in Vim would cause incompatibility with Vi. + For example for this Vi mapping: > + :map xx asdf\ +< Therefore the unusual leading backslash is used. + + Starting a comment in a continuation line results in all following + continuation lines to be part of the comment. Since it was like this + for a long time, when making it possible to add a comment halfway a + sequence of continuation lines, it was not possible to use \", since + that was a valid continuation line. Using '"\ ' comes closest, even + though it may look a bit weird. Requiring the space after the + backslash is to make it very unlikely this is a normal comment line. + +============================================================================== +5. Using Vim packages *packages* + +A Vim package is a directory that contains one or more plugins. The +advantages over normal plugins: +- A package can be downloaded as an archive and unpacked in its own directory. + Thus the files are not mixed with files of other plugins. That makes it + easy to update and remove. +- A package can be a git, mercurial, etc. repository. That makes it really + easy to update. +- A package can contain multiple plugins that depend on each other. +- A package can contain plugins that are automatically loaded on startup and + ones that are only loaded when needed with `:packadd`. + + +Using a package and loading automatically ~ + +Let's assume your Vim files are in the "~/.vim" directory and you want to add a +package from a zip archive "/tmp/foopack.zip": + % mkdir -p ~/.vim/pack/foo + % cd ~/.vim/pack/foo + % unzip /tmp/foopack.zip + +The directory name "foo" is arbitrary, you can pick anything you like. + +You would now have these files under ~/.vim: + pack/foo/README.txt + pack/foo/start/foobar/plugin/foo.vim + pack/foo/start/foobar/syntax/some.vim + pack/foo/opt/foodebug/plugin/debugger.vim + +When Vim starts up, after processing your .vimrc, it scans all directories in +'packpath' for plugins under the "pack/*/start" directory. First all those +directories are added to 'runtimepath'. Then all the plugins are loaded. +See |packload-two-steps| for how these two steps can be useful. + +In the example Vim will find "pack/foo/start/foobar/plugin/foo.vim" and adds +"~/.vim/pack/foo/start/foobar" to 'runtimepath'. + +If the "foobar" plugin kicks in and sets the 'filetype' to "some", Vim will +find the syntax/some.vim file, because its directory is in 'runtimepath'. + +Vim will also load ftdetect files, if there are any. + +Note that the files under "pack/foo/opt" are not loaded automatically, only the +ones under "pack/foo/start". See |pack-add| below for how the "opt" directory +is used. + +Loading packages automatically will not happen if loading plugins is disabled, +see |load-plugins|. + +To load packages earlier, so that 'runtimepath' gets updated: > + :packloadall +This also works when loading plugins is disabled. The automatic loading will +only happen once. + +If the package has an "after" directory, that directory is added to the end of +'runtimepath', so that anything there will be loaded later. + + +Using a single plugin and loading it automatically ~ + +If you don't have a package but a single plugin, you need to create the extra +directory level: + % mkdir -p ~/.vim/pack/foo/start/foobar + % cd ~/.vim/pack/foo/start/foobar + % unzip /tmp/someplugin.zip + +You would now have these files: + pack/foo/start/foobar/plugin/foo.vim + pack/foo/start/foobar/syntax/some.vim + +From here it works like above. + + +Optional plugins ~ + *pack-add* +To load an optional plugin from a pack use the `:packadd` command: > + :packadd foodebug +This searches for "pack/*/opt/foodebug" in 'packpath' and will find +~/.vim/pack/foo/opt/foodebug/plugin/debugger.vim and source it. + +This could be done if some conditions are met. For example, depending on +whether Vim supports a feature or a dependency is missing. + +You can also load an optional plugin at startup, by putting this command in +your |.vimrc|: > + :packadd! foodebug +The extra "!" is so that the plugin isn't loaded if Vim was started with +|--noplugin|. + +It is perfectly normal for a package to only have files in the "opt" +directory. You then need to load each plugin when you want to use it. + + +Where to put what ~ + +Since color schemes, loaded with `:colorscheme`, are found below +"pack/*/start" and "pack/*/opt", you could put them anywhere. We recommend +you put them below "pack/*/opt", for example +".vim/pack/mycolors/opt/dark/colors/very_dark.vim". + +Filetype plugins should go under "pack/*/start", so that they are always +found. Unless you have more than one plugin for a file type and want to +select which one to load with `:packadd`. E.g. depending on the compiler +version: > + if foo_compiler_version > 34 + packadd foo_new + else + packadd foo_old + endif + +The "after" directory is most likely not useful in a package. It's not +disallowed though. + +============================================================================== +6. Creating Vim packages *package-create* + +This assumes you write one or more plugins that you distribute as a package. + +If you have two unrelated plugins you would use two packages, so that Vim +users can choose what they include or not. Or you can decide to use one +package with optional plugins, and tell the user to add the preferred ones with +`:packadd`. + +Decide how you want to distribute the package. You can create an archive or +you could use a repository. An archive can be used by more users, but is a +bit harder to update to a new version. A repository can usually be kept +up-to-date easily, but it requires a program like "git" to be available. +You can do both, github can automatically create an archive for a release. + +Your directory layout would be like this: + start/foobar/plugin/foo.vim " always loaded, defines commands + start/foobar/plugin/bar.vim " always loaded, defines commands + start/foobar/autoload/foo.vim " loaded when foo command used + start/foobar/doc/foo.txt " help for foo.vim + start/foobar/doc/tags " help tags + opt/fooextra/plugin/extra.vim " optional plugin, defines commands + opt/fooextra/autoload/extra.vim " loaded when extra command used + opt/fooextra/doc/extra.txt " help for extra.vim + opt/fooextra/doc/tags " help tags + +This allows for the user to do: > + mkdir ~/.vim/pack/myfoobar + cd ~/.vim/pack/myfoobar + git clone https://github.com/you/foobar.git + +Here "myfoobar" is a name that the user can choose, the only condition is that +it differs from other packages. + +In your documentation you explain what the plugins do, and tell the user how +to load the optional plugin: > + :packadd! fooextra + +You could add this packadd command in one of your plugins, to be executed when +the optional plugin is needed. + +Run the `:helptags` command to generate the doc/tags file. Including this +generated file in the package means that the user can drop the package in the +pack directory and the help command works right away. Don't forget to re-run +the command after changing the plugin help: > + :helptags path/start/foobar/doc + :helptags path/opt/fooextra/doc + + +Dependencies between plugins ~ + *packload-two-steps* +Suppose you have two plugins that depend on the same functionality. You can +put the common functionality in an autoload directory, so that it will be +found automatically. Your package would have these files: + + pack/foo/start/one/plugin/one.vim > + call foolib#getit() +< pack/foo/start/two/plugin/two.vim > + call foolib#getit() +< pack/foo/start/lib/autoload/foolib.vim > + func foolib#getit() + +This works, because loading packages will first add all found directories to +'runtimepath' before sourcing the plugins. + +============================================================================== +7. Debugging scripts *debug-scripts* + +Besides the obvious messages that you can add to your scripts to find out what +they are doing, Vim offers a debug mode. This allows you to step through a +sourced file or user function and set breakpoints. + +NOTE: The debugging mode is far from perfect. Debugging will have side +effects on how Vim works. You cannot use it to debug everything. For +example, the display is messed up by the debugging messages. + +An alternative to debug mode is setting the 'verbose' option. With a bigger +number it will give more verbose messages about what Vim is doing. + + +STARTING DEBUG MODE *debug-mode* + +To enter debugging mode use one of these methods: +1. Start Vim with the |-D| argument: > + vim -D file.txt +< Debugging will start as soon as the first vimrc file is sourced. This is + useful to find out what is happening when Vim is starting up. A side + effect is that Vim will switch the terminal mode before initialisations + have finished, with unpredictable results. + For a GUI-only version (Windows, Macintosh) the debugging will start as + soon as the GUI window has been opened. To make this happen early, add a + ":gui" command in the vimrc file. + *:debug* +2. Run a command with ":debug" prepended. Debugging will only be done while + this command executes. Useful for debugging a specific script or user + function. And for scripts and functions used by autocommands. Example: > + :debug edit test.txt.gz + +3. Set a breakpoint in a sourced file or user function. You could do this in + the command line: > + vim -c "breakadd file */explorer.vim" . +< This will run Vim and stop in the first line of the "explorer.vim" script. + Breakpoints can also be set while in debugging mode. + +In debugging mode every executed command is displayed before it is executed. +Comment lines, empty lines and lines that are not executed are skipped. When +a line contains two commands, separated by "|", each command will be displayed +separately. + + +DEBUG MODE + +Once in debugging mode, the usual Ex commands can be used. For example, to +inspect the value of a variable: > + echo idx +When inside a user function, this will print the value of the local variable +"idx". Prepend "g:" to get the value of a global variable: > + echo g:idx +All commands are executed in the context of the current function or script. +You can also set options, for example setting or resetting 'verbose' will show +what happens, but you might want to set it just before executing the lines you +are interested in: > + :set verbose=20 + +Commands that require updating the screen should be avoided, because their +effect won't be noticed until after leaving debug mode. For example: > + :help +won't be very helpful. + +There is a separate command-line history for debug mode. + +The line number for a function line is relative to the start of the function. +If you have trouble figuring out where you are, edit the file that defines +the function in another Vim, search for the start of the function and do +"99j". Replace "99" with the line number. + +Additionally, these commands can be used: + *>cont* + cont Continue execution until the next breakpoint is hit. + *>quit* + quit Abort execution. This is like using CTRL-C, some + things might still be executed, doesn't abort + everything. Still stops at the next breakpoint. + *>next* + next Execute the command and come back to debug mode when + it's finished. This steps over user function calls + and sourced files. + *>step* + step Execute the command and come back to debug mode for + the next command. This steps into called user + functions and sourced files. + *>interrupt* + interrupt This is like using CTRL-C, but unlike ">quit" comes + back to debug mode for the next command that is + executed. Useful for testing |:finally| and |:catch| + on interrupt exceptions. + *>finish* + finish Finish the current script or user function and come + back to debug mode for the command after the one that + sourced or called it. + *>bt* + *>backtrace* + *>where* + backtrace Show the call stacktrace for current debugging session. + bt + where + *>frame* + frame N Goes to N backtrace level. + and - signs make movement + relative. E.g., ":frame +3" goes three frames up. + *>up* + up Goes one level up from call stacktrace. + *>down* + down Goes one level down from call stacktrace. + +About the additional commands in debug mode: +- There is no command-line completion for them, you get the completion for the + normal Ex commands only. +- You can shorten them, up to a single character, unless more than one command + starts with the same letter. "f" stands for "finish", use "fr" for "frame". +- Hitting <CR> will repeat the previous one. When doing another command, this + is reset (because it's not clear what you want to repeat). +- When you want to use the Ex command with the same name, prepend a colon: + ":cont", ":next", ":finish" (or shorter). + +The backtrace shows the hierarchy of function calls, e.g.: + >bt ~ + 3 function One[3] ~ + 2 Two[3] ~ + ->1 Three[3] ~ + 0 Four ~ + line 1: let four = 4 ~ + +The "->" points to the current frame. Use "up", "down" and "frame N" to +select another frame. + +In the current frame you can evaluate the local function variables. There is +no way to see the command at the current line yet. + + +DEFINING BREAKPOINTS + *:breaka* *:breakadd* +:breaka[dd] func [lnum] {name} + Set a breakpoint in a function. Example: > + :breakadd func Explore +< Doesn't check for a valid function name, thus the breakpoint + can be set before the function is defined. + +:breaka[dd] file [lnum] {name} + Set a breakpoint in a sourced file. Example: > + :breakadd file 43 .vimrc + +:breaka[dd] here + Set a breakpoint in the current line of the current file. + Like doing: > + :breakadd file <cursor-line> <current-file> +< Note that this only works for commands that are executed when + sourcing the file, not for a function defined in that file. + +:breaka[dd] expr {expression} + Sets a breakpoint, that will break whenever the {expression} + evaluates to a different value. Example: > + :breakadd expr g:lnum + +< Will break, whenever the global variable lnum changes. + Note if you watch a |script-variable| this will break + when switching scripts, since the script variable is only + valid in the script where it has been defined and if that + script is called from several other scripts, this will stop + whenever that particular variable will become visible or + unaccessible again. + +The [lnum] is the line number of the breakpoint. Vim will stop at or after +this line. When omitted line 1 is used. + + *:debug-name* +{name} is a pattern that is matched with the file or function name. The +pattern is like what is used for autocommands. There must be a full match (as +if the pattern starts with "^" and ends in "$"). A "*" matches any sequence +of characters. 'ignorecase' is not used, but "\c" can be used in the pattern +to ignore case |/\c|. Don't include the () for the function name! + +The match for sourced scripts is done against the full file name. If no path +is specified the current directory is used. Examples: > + breakadd file explorer.vim +matches "explorer.vim" in the current directory. > + breakadd file *explorer.vim +matches ".../plugin/explorer.vim", ".../plugin/iexplorer.vim", etc. > + breakadd file */explorer.vim +matches ".../plugin/explorer.vim" and "explorer.vim" in any other directory. + +The match for functions is done against the name as it's shown in the output +of ":function". However, for local functions the script-specific prefix such +as "<SNR>99_" is ignored to make it easier to match script-local functions +without knowing the ID of the script. + +Note that functions are first loaded and later executed. When they are loaded +the "file" breakpoints are checked, when they are executed the "func" +breakpoints. + + +DELETING BREAKPOINTS + *:breakd* *:breakdel* *E161* +:breakd[el] {nr} + Delete breakpoint {nr}. Use |:breaklist| to see the number of + each breakpoint. + +:breakd[el] * + Delete all breakpoints. + +:breakd[el] func [lnum] {name} + Delete a breakpoint in a function. + +:breakd[el] file [lnum] {name} + Delete a breakpoint in a sourced file. + +:breakd[el] here + Delete a breakpoint at the current line of the current file. + +When [lnum] is omitted, the first breakpoint in the function or file is +deleted. +The {name} must be exactly the same as what was typed for the ":breakadd" +command. "explorer", "*explorer.vim" and "*explorer*" are different. + + +LISTING BREAKPOINTS + *:breakl* *:breaklist* +:breakl[ist] + List all breakpoints. + + +OBSCURE + + *:debugg* *:debuggreedy* +:debugg[reedy] + Read debug mode commands from the normal input stream, instead + of getting them directly from the user. Only useful for test + scripts. Example: > + echo 'q^Mq' | vim -e -s -c debuggreedy -c 'breakadd file script.vim' -S script.vim + +:0debugg[reedy] + Undo ":debuggreedy": get debug mode commands directly from the + user, don't use typeahead for debug commands. + +============================================================================== +8. Profiling *profile* *profiling* + +Profiling means that Vim measures the time that is spent on executing +functions and/or scripts. The |+profile| feature is required for this. +It is included when Vim was compiled with "huge" features. + +You can also use the |reltime()| function to measure time. This only requires +the |+reltime| feature, which is present in more builds. + +For profiling syntax highlighting see |:syntime|. + +For example, to profile the one_script.vim script file: > + :profile start /tmp/one_script_profile + :profile file one_script.vim + :source one_script.vim + :exit + + +:prof[ile] start {fname} *:prof* *:profile* *E750* + Start profiling, write the output in {fname} upon exit. + "~/" and environment variables in {fname} will be expanded. + If {fname} already exists it will be silently overwritten. + The variable |v:profiling| is set to one. + +:prof[ile] pause + Don't profile until the following ":profile continue". Can be + used when doing something that should not be counted (e.g., an + external command). Does not nest. + +:prof[ile] continue + Continue profiling after ":profile pause". + +:prof[ile] func {pattern} + Profile function that matches the pattern {pattern}. + See |:debug-name| for how {pattern} is used. + +:prof[ile][!] file {pattern} + Profile script file that matches the pattern {pattern}. + See |:debug-name| for how {pattern} is used. + This only profiles the script itself, not the functions + defined in it. + When the [!] is added then all functions defined in the script + will also be profiled. + Note that profiling only starts when the script is loaded + after this command. A :profile command in the script itself + won't work. + + +:profd[el] ... *:profd* *:profdel* + Stop profiling for the arguments specified. See |:breakdel| + for the arguments. + + +You must always start with a ":profile start fname" command. The resulting +file is written when Vim exits. For example, to profile one specific +function: > + profile start /tmp/vimprofile + profile func MyFunc + +Here is an example of the output, with line +numbers prepended for the explanation: + + 1 FUNCTION Test2() ~ + 2 Called 1 time ~ + 3 Total time: 0.155251 ~ + 4 Self time: 0.002006 ~ + 5 ~ + 6 count total (s) self (s) ~ + 7 9 0.000096 for i in range(8) ~ + 8 8 0.153655 0.000410 call Test3() ~ + 9 8 0.000070 endfor ~ + 10 " Ask a question ~ + 11 1 0.001341 echo input("give me an answer: ") ~ + +The header (lines 1-4) gives the time for the whole function. The "Total" +time is the time passed while the function was executing. The "Self" time is +the "Total" time reduced by time spent in: +- other user defined functions +- sourced scripts +- executed autocommands +- external (shell) commands + +Lines 7-11 show the time spent in each executed line. Lines that are not +executed do not count. Thus a comment line is never counted. + +The Count column shows how many times a line was executed. Note that the +"for" command in line 7 is executed one more time as the following lines. +That is because the line is also executed to detect the end of the loop. + +The time Vim spends waiting for user input isn't counted at all. Thus how +long you take to respond to the input() prompt is irrelevant. + +Profiling should give a good indication of where time is spent, but keep in +mind there are various things that may clobber the results: + +- The accuracy of the time measured depends on the gettimeofday() system + function. It may only be as accurate as 1/100 second, even though the times + are displayed in micro seconds. + +- Real elapsed time is measured, if other processes are busy they may cause + delays at unpredictable moments. You may want to run the profiling several + times and use the lowest results. + +- If you have several commands in one line you only get one time. Split the + line to see the time for the individual commands. + +- The time of the lines added up is mostly less than the time of the whole + function. There is some overhead in between. + +- Functions that are deleted before Vim exits will not produce profiling + information. You can check the |v:profiling| variable if needed: > + :if !v:profiling + : delfunc MyFunc + :endif +< +- Profiling may give weird results on multi-processor systems, when sleep + mode kicks in or the processor frequency is reduced to save power. + +- The "self" time is wrong when a function is used recursively. + + + vim:tw=78:ts=8:noet:ft=help:norl: |