Z shell configuring and usage

Man pages description:

man page	description
zshmisc	programming
zshexpn	variables usage, globbing
zshparam	shell variables(like PROMPT etc.)
zshoptions	commandline options(setopt, no_beep etc.)
zshbuiltins	builtin shell commands(like alias, bindkey, cd, echo, kill)
zshzle	editing in commandline
zshcompsys	z-shell completing system and it’s configuration
zshmodules	loadable extesion modules
zshcontrib	user extesions, tips

Startup

configuration files read order:

/etc/zsh/zshenv
$ZDOTDIR/.zshenv
/etc/zsh/zprofile (if the shell is a login shell)
$ZDOTDIR/.zprofile (if the shell is a login shell)
/etc/zsh/zshrc (if the shell is interactive)
$ZDOTDIR/.zshrc (if the shell is interactive)
/etc/zsh/zlogin (if the shell is a login shell)
$ZDOTDIR/.zlogin (if the shell is a login shell)

If ZDOTDIR is unset, HOME is used instead

When a login shell exits, the files $ZDOTDIR/.zlogout and then /etc/zsh/zlogout are read. This happens with either an explicit exit via the exit or logout commands, or an implicit exit by reading end-of-file from the terminal.

invoking first-time setup

If no personal initialization files exist for the current user, a function is run to help you change some of the most common settings. It won’t appear if your administrator has disabled the zsh/newuser module. The function is designed to be self-explanatory. You can run it by hand with autoload -Uz zsh-newuser-install; zsh-newuser-install -f.

Commandline editing

all about editing in command line is ZLE - Zsh Line Editor(builtin zsh module).

Parameters used by ZLE(section PARAMETERS USED BY THE SHELL in zshparam man page):

BAUD
KEYTIMEOUT
COLUMNS - the number of columns for this terminal session. Used for printing select lists and for the line editor
LINES - the number of lines for this terminal session. Used for printing select lists and for the line editor
zle_highlight - used to highlight what you editing

Commands used by ZLE:

bindkey - manipulates keymaps and key bindings
vared - invokes ZLE on the value of a shell parameter(like vared PATH will give you commandline interface to edit PATH variable)
zle - manipulates editing widgets and allows command line access to ZLE commands from within shell functions

ZLE has six predefined keymaps(keymap in this case is a set of bindings between key sequences and ZLE commands)

emacs	EMACS emulation
viins	vi emulation - insert mode
vicmd	vi emulation - command mode
isearch	incremental search mode
command	read a command name
.safe	fallback keymap

To select keymap use one of the following commands:

bindkey -e # Selects keymap 'emacs'
bindkey -v # Selects keymap 'viins'
bindkey -a # Selects keymap 'vicmd'

Command-line hotkeys:

widget	emacs	vicmd	viins	description
vi-backward-blank-word		B		Move backward one word, where a word is defined as a series of non-blank characters.
backward-char	^B ESC-[D			Move backward one character.
vi-backward-char		^H h ^?	ESC-[D	Move backward one character, without changing lines.
backward-word	ESC-B ESC-b			Move to the beginning of the previous word.
emacs-backward-word				Move to the beginning of the previous word.
vi-backward-word		b		Move to the beginning of the previous word, vi-style.
beginning-of-line	^A			Move to the beginning of the line. If already at the beginning of the line, move to the beginning of the previous line, if any.
vi-beginning-of-line				Move to the beginning of the line, without changing lines.
end-of-line	^E			Move to the end of the line. If already at the end of the line, move to the end of the next line, if any.
vi-end-of-line		$		Move to the end of the line. If an argument is given to this command, the cursor will be moved to the end of the line argument - 1 lines down.
vi-forward-blank-word		W		Move forward one word, where a word is defined as a series of non-blank characters.
vi-forward-blank-word-end		E		Move to the end of the current word, or, if at the end of the current word, to the end of the next word, where a word is defined as a series of non-blank characters.
forward-char	^F ESC-[C			Move forward one character.
vi-forward-char		space l	ESC-[C	Move forward one character.
vi-find-next-char	^X^F	f		Read a character from the keyboard, and move to the next occurrence of it in the line.
vi-find-next-char-skip		t		Read a character from the keyboard, and move to the position just before the next occurrence of it in the line.
vi-find-prev-char		F		Read a character from the keyboard, and move to the previous occur‐ rence of it in the line.
vi-find-prev-char-skip		T		Read a character from the keyboard, and move to the position just after the previous occurrence of it in the line.
vi-first-non-blank		^		Move to the first non-blank character in the line.
vi-forward-word		w		Move forward one word, vi-style.
forward-word	ESC-F ESC-f			Move to the beginning of the next word. The editor’s idea of a word is specified with the WORDCHARS parameter.
emacs-forward-word				Move to the end of the next word.
vi-forward-word-end		e		Move to the end of the next word.
vi-goto-column	ESC-\|	\|		Move to the column specified by the numeric argument.
vi-goto-mark		`		Move to the specified mark.
vi-goto-mark-line		’		Move to beginning of the line containing the specified mark.
vi-repeat-find		;		Repeat the last vi-find command.
vi-rev-repeat-find		,		Repeat the last vi-find command in the opposite direction.

History Control

beginning-of-buffer-or-history	ESC-<	unbound	unbound	Move to the beginning of the buffer, or if already there, move to the first event in the history list.
beginning-of-line-hist				Move to the beginning of the line. If already at the beginning of the buffer, move to the previous history line.
beginning-of-history				Move to the first event in the history list.
down-line-or-history	^N ESC-[B	j	ESC-[B	Move down a line in the buffer, or if already at the bottom line, move to the next event in the history list.
vi-down-line-or-history	unbound	+	unbound	Move down a line in the buffer, or if already at the bottom line, move to the next event in the history list. Then move to the first non-blank character on the line.
down-line-or-search				Move down a line in the buffer, or if already at the bottom line, search forward in the history for a line beginning with the first word in the buffer. If called from a function by the zle command with arguments, the first argument is taken as the string for which to search, rather than the first word in the buffer.
down-history	unbound	^N	unbound	Move to the next event in the history list.
history-beginning-search-backward				Search backward in the history for a line beginning with the current line up to the cursor. This leaves the cursor in its original position.
end-of-buffer-or-history	ESC-\>	unbound	unbound	Move to the end of the buffer, or if already there, move to the last event in the history list.
end-of-line-hist				Move to the end of the line. If already at the end of the buffer, move to the next history line.
end-of-history				Move to the last event in the history list.
vi-fetch-history	unbound	G	unbound	Fetch the history line specified by the numeric argument. This defaults to the current history line (i.e. the one that isn’t history yet).
history-incremental-search-backward	^R ^Xr	unbound	unbound	Search backward incrementally for a specified string. The search is case-insensitive if the search string does not have uppercase letters and no numeric argument was given. The string may begin with ‘^’ to anchor the search to the beginning of the line. When called from a user-defined function returns the following statuses: 0, if the search succeeded; 1, if the search failed; 2, if the search term was a bad pattern; 3, if the search was aborted by the send-break command.
history-incremental-search-forward	^S ^Xs	unbound	unbound	Search forward incrementally for a specified string. The search is case-insensitive if the search string does not have uppercase letters and no numeric argu‐ ment was given. The string may begin with ‘^’ to anchor the search to the beginning of the line. The functions available in the mini-buffer are the same as for history-incremental-search-backward.
history-incremental-pattern-search-forward,
history-incremental-pattern-search-backward				These widgets behave similarly to the corresponding widgets with no -pattern, but the search string typed by the user is treated as a pattern, respecting the current settings of the various options affecting pattern matching. See FILENAME GENERATION in zshexpn(1) for a description of patterns. If no numeric argu‐ ment was given lowercase letters in the search string may match uppercase letters in the history. The string may begin with ‘^’ to anchor the search to the beginning of the line. The prompt changes to indicate an invalid pattern; this may simply indicate the pattern is not yet complete. Note that only non-overlapping matches are reported, so an expression with wildcards may return fewer matches on a line than are visible by inspection.
history-search-backward	ESC-P ESC-p	unbound	unbound	Search backward in the history for a line beginning with the first word in the buffer. If called from a function by the zle command with arguments, the first argument is taken as the string for which to search, rather than the first word in the buffer.
vi-history-search-backward	unbound	/	unbound	Search backward in the history for a specified string. The string may begin with ‘^’ to anchor the search to the beginning of the line. A restricted set of editing functions is available in the mini-buffer. An interrupt signal, as defined by the stty setting, will stop the search. The func‐ tions available in the mini-buffer are: accept-line, backward-delete-char, vi-backward-delete-char, backward-kill-word, vi-backward-kill-word, clear-screen, redisplay, quoted-insert and vi-quoted-insert. vi-cmd-mode is treated the same as accept-line, and magic-space is treated as a space. Any other character that is not bound to self-insert or self-insert-unmeta will beep and be ignored. If the function is called from vi command mode, the bindings of the current insert mode will be used. If called from a function by the zle command with arguments, the first argument is taken as the string for which to search, rather than the first word in the buffer.
history-search-forward	ESC-N ESC-n	unbound	unbound	Search forward in the history for a line beginning with the first word in the buffer. If called from a function by the zle command with arguments, the first argument is taken as the string for which to search, rather than the first word in the buffer.
vi-history-search-forward	unbound	?	unbound	Search forward in the history for a specified string. The string may begin with ‘^’ to anchor the search to the beginning of the line. The functions avail‐ able in the mini-buffer are the same as for vi-history-search-backward. Argument handling is also the same as for that command.
infer-next-history	^X^N	unbound	unbound	Search in the history list for a line matching the current one and fetch the event following it.
insert-last-word	ESC-_ ESC-.	unbound	unbound	Insert the last word from the previous history event at the cursor position. If a positive numeric argument is given, insert that word from the end of the previous history event. If the argument is zero or negative insert that word from the left (zero inserts the previous command word). Repeating this command replaces the word just inserted with the last word from the history event prior to the one just used; numeric arguments can be used in the same way to pick a word from that event. When called from a shell function invoked from a user-defined widget, the command can take one to three arguments. The first argument specifies a history offset which applies to successive calls to this widget: if is -1, the default behaviour is used, while if it is 1, successive calls will move forwards through the history. The value 0 can be used to indicate that the history line examined by the previous execution of the command will be reexamined. Note that negative numbers should be preceded with a ‘–’ argument to avoid confusing them with options. If two arguments are given, the second specifies the word on the command line in normal array index notation (as a more natural alternative to the prefix argument). Hence 1 is the first word, and -1 (the default) is the last word. If a third argument is given, its value is ignored, but it is used to signify that the history offset is relative to the current history line, rather than the one remembered after the previous invocations of insert-last-word. For example, the default behaviour of the command corresponds to zle insert-last-word – -1 -1 while the command zle insert-last-word – -1 1 - always copies the first word of the line in the history immediately before the line being edited. This has the side effect that later invocations of the wid‐ get will be relative to that line.
vi-repeat-search	unbound	n	unbound	Repeat the last vi history search.
vi-rev-repeat-search	unbound	N	unbound	Repeat the last vi history search, but in reverse.
up-line-or-history	^P ESC-[A	k	ESC-[A	Move up a line in the buffer, or if already at the top line, move to the previous event in the history list.
vi-up-line-or-history	unbound	-	unbound	Move up a line in the buffer, or if already at the top line, move to the previous event in the history list. Then move to the first non-blank character on the line.
up-line-or-search				Move up a line in the buffer, or if already at the top line, search backward in the history for a line beginning with the first word in the buffer. If called from a function by the zle command with arguments, the first argument is taken as the string for which to search, rather than the first word in the buffer.
up-history	unbound	^P	unbound	Move to the previous event in the history list. history-beginning-search-forward Search forward in the history for a line beginning with the current line up to the cursor. This leaves the cursor in its original position.

Modifying

text vi-add-eol	unbound	A	unbound	Move to the end of the line and enter insert mode.
vi-add-next	unbound	a	unbound	Enter insert mode after the current cursor position, without changing lines.
backward-delete-char	^H ^?	unbound	unbound	Delete the character behind the cursor.
vi-backward-delete-char	unbound	X	^H	Delete the character behind the cursor, without changing lines. If in insert mode, this won’t delete past the point where insert mode was last entered. backward-delete-word Delete the word behind the cursor. backward-kill-line Kill from the beginning of the line to the cursor position.
backward-kill-word	^W ESC-^H ESC-^?	unbound	unbound	Kill the word behind the cursor.
vi-backward-kill-word	unbound	unbound	^W	Kill the word behind the cursor, without going past the point where insert mode was last entered.
capitalize-word	ESC-C ESC-c	unbound	unbound	Capitalize the current word and move past it.
vi-change	unbound	c	unbound	Read a movement command from the keyboard, and kill from the cursor position to the endpoint of the movement. Then enter insert mode. If the command is vi-change, change the current line.
vi-change-eol	unbound	C	unbound	Kill to the end of the line and enter insert mode.
vi-change-whole-line	unbound	S	unbound	Kill the current line and enter insert mode.
copy-region-as-kill	ESC-W ESC-w	unbound	unbound	Copy the area from the cursor to the mark to the kill buffer. If called from a ZLE widget function in the form ‘zle copy-region-as-kill string’ then string will be taken as the text to copy to the kill buffer. The cur‐ sor, the mark and the text on the command line are not used in this case.
copy-prev-word	ESC-^_	unbound	unbound	Duplicate the word to the left of the cursor. copy-prev-shell-word Like copy-prev-word, but the word is found by using shell parsing, whereas copy-prev-word looks for blanks. This makes a difference when the word is quoted and contains spaces.
vi-delete	unbound	d	unbound	Read a movement command from the keyboard, and kill from the cursor position to the endpoint of the movement. If the command is vi-delete, kill the current line. delete-char Delete the character under the cursor.
vi-delete-char	unbound	x	unbound	Delete the character under the cursor, without going past the end of the line. delete-word Delete the current word.
down-case-word	ESC-L ESC-l	unbound	unbound	Convert the current word to all lowercase and move past it.
kill-word	ESC-D ESC-d	unbound	unbound	Kill the current word. gosmacs-transpose-chars Exchange the two characters behind the cursor.
vi-indent	unbound	>	unbound	Indent a number of lines.
vi-insert	unbound	i	unbound	Enter insert mode.
vi-insert-bol	unbound	I	unbound	Move to the first non-blank character on the line and enter insert mode.
vi-join	^X^J	J	unbound	Join the current line with the next one.
kill-line	^K	unbound	unbound	Kill from the cursor to the end of the line. If already on the end of the line, kill the newline character.
vi-kill-line	unbound	unbound	^U	Kill from the cursor back to wherever insert mode was last entered.
vi-kill-eol	unbound	D	unbound	Kill from the cursor to the end of the line. kill-region Kill from the cursor to the mark.
kill-buffer	^X^K	unbound	unbound	Kill the entire buffer.
kill-whole-line	^U	unbound	unbound	Kill the current line.
vi-match-bracket	^X^B	%	unbound	Move to the bracket character (one of {}, () or []) that matches the one under the cursor. If the cursor is not on a bracket character, move forward without going past the end of the line to find one, and then go to the matching bracket.
vi-open-line-above	unbound	O	unbound	Open a line above the cursor and enter insert mode.
vi-open-line-below	unbound	o	unbound	Open a line below the cursor and enter insert mode.
vi-oper-swap-case				Read a movement command from the keyboard, and swap the case of all characters from the cursor position to the endpoint of the movement. If the movement com‐ mand is vi-oper-swap-case, swap the case of all characters on the current line.
overwrite-mode	^X^O	unbound	unbound	Toggle between overwrite mode and insert mode.
vi-put-before	unbound	P	unbound	Insert the contents of the kill buffer before the cursor. If the kill buffer contains a sequence of lines (as opposed to characters), paste it above the cur‐ rent line.
vi-put-after	unbound	p	unbound	Insert the contents of the kill buffer after the cursor. If the kill buffer contains a sequence of lines (as opposed to characters), paste it below the cur‐ rent line.
quoted-insert	^V	unbound	unbound	Insert the next character typed into the buffer literally. An interrupt character will not be inserted.
vi-quoted-insert	unbound	unbound	^Q ^V	Display a ‘^’ at the cursor position, and insert the next character typed into the buffer literally. An interrupt character will not be inserted.
quote-line	ESC-‘	unbound	unbound	Quote the current line; that is, put a ‘’’ character at the beginning and the end, and convert all ‘’’ characters to ‘’'’’.
quote-region	ESC-“	unbound	unbound	Quote the region from the cursor to the mark.
vi-replace	unbound	R	unbound	Enter overwrite mode.
vi-repeat-change	unbound	.	unbound	Repeat the last vi mode text modification. If a count was used with the modification, it is remembered. If a count is given to this command, it overrides the remembered count, and is remembered for future uses of this command. The cut buffer specification is similarly remembered.
vi-replace-chars	unbound	r	unbound	Replace the character under the cursor with a character read from the keyboard.
self-insert	printable characters	unbound	printable characters and some control characters	Insert a character into the buffer at the cursor position.
self-insert-unmeta	ESC-^I ESC-^J ESC-^M	unbound	unbound	Insert a character into the buffer after stripping the meta bit and converting ^M to ^J.
vi-substitute	unbound	s	unbound	Substitute the next character(s).
vi-swap-case	unbound	~	unbound	Swap the case of the character under the cursor and move past it.
transpose-chars	^T	unbound	unbound	Exchange the two characters to the left of the cursor if at end of line, else exchange the character under the cursor with the character to the left.
transpose-words	ESC-T ESC-t	unbound	unbound	Exchange the current word with the one before it.
vi-unindent	unbound	<	unbound	Unindent a number of lines.
up-case-word	ESC-U ESC-u	unbound	unbound	Convert the current word to all caps and move past it.
yank	^Y	unbound	unbound	Insert the contents of the kill buffer at the cursor position.
yank-pop	ESC-y	unbound	unbound	Remove the text just yanked, rotate the kill-ring (the history of previously killed text) and yank the new top. Only works following yank or yank-pop.
vi-yank	unbound	y	unbound	Read a movement command from the keyboard, and copy the region from the cursor position to the endpoint of the movement into the kill buffer. If the command is vi-yank, copy the current line.
vi-yank-whole-line	unbound	Y	unbound	Copy the current line into the kill buffer.
vi-yank-eol				Copy the region from the cursor position to the end of the line into the kill buffer. Arguably, this is what Y should do in vi, but it isn’t what it actually does.

Completion

accept-and-menu-complete				In a menu completion, insert the current completion into the buffer, and advance to the next possible completion.
complete-word				Attempt completion on the current word.
delete-char-or-list	^D	unbound	unbound	Delete the character under the cursor. If the cursor is at the end of the line, list possible completions for the current word.
expand-cmd-path				Expand the current command to its full pathname.
expand-or-complete	TAB	unbound	TAB	Attempt shell expansion on the current word. If that fails, attempt completion.
expand-or-complete-prefix				Attempt shell expansion on the current word up to cursor.
expand-history	ESC-space ESC-!	unbound	unbound	Perform history expansion on the edit buffer.
expand-word	^X*	unbound	unbound	Attempt shell expansion on the current word.
list-choices	ESC-^D	^D =	^D	List possible completions for the current word.
list-expand	^Xg ^XG	^G	^G	List the expansion of the current word.
magic-space				Perform history expansion and insert a space into the buffer. This is intended to be bound to space.
menu-complete				Like complete-word, except that menu completion is used. See the MENU_COMPLETE option.
menu-expand-or-complete				Like expand-or-complete, except that menu completion is used.
reverse-menu-complete				Perform menu completion, like menu-complete, except that if a menu completion is already in progress, move to the previous completion rather than the next.
end-of-list				When a previous completion displayed a list below the prompt, this widget can be used to move the prompt below the list.

Misc

accept-and-hold	ESC-A ESC-a	unbound	unbound	Push the contents of the buffer on the buffer stack and execute it.
accept-and-infer-next-history				Execute the contents of the buffer. Then search the history list for a line matching the current one and push the event following onto the buffer stack.
accept-line	^J ^M	^J ^M	^J ^M	Finish editing the buffer. Normally this causes the buffer to be executed as a shell command.
accept-line-and-down-history	^O	unbound	unbound	Execute the current line, and push the next history event on the the buffer stack.
auto-suffix-remove				If the previous action added a suffix (space, slash, etc.) to the word on the command line, remove it. Otherwise do nothing. Removing the suffix ends any active menu completion or menu selection. This widget is intended to be called from user-defined widgets to enforce a desired suffix-removal behavior.
auto-suffix-retain				If the previous action added a suffix (space, slash, etc.) to the word on the command line, force it to be preserved. Otherwise do nothing. Retaining the suffix ends any active menu completion or menu selection. This widget is intended to be called from user-defined widgets to enforce a desired suffix-preservation behavior.
beep				Beep, unless the BEEP option is unset.
vi-cmd-mode	^X^V	unbound	^[	Enter command mode; that is, select the ‘vicmd’ keymap. Yes, this is bound by default in emacs mode.
vi-caps-lock-panic				Hang until any lowercase key is pressed. This is for vi users without the mental capacity to keep track of their caps lock key (like the author).
clear-screen	^L ESC-^L	^L	^L	Clear the screen and redraw the prompt.
describe-key-briefly				Reads a key sequence, then prints the function bound to that sequence.
exchange-point-and-mark	^X^X	unbound	unbound	Exchange the cursor position (point) with the position of the mark. Unless a negative prefix argument is given, the region between point and mark is acti‐ vated so that it can be highlighted. If a zero prefix argument is given, the region is activated but point and mark are not swapped.
execute-named-cmd	ESC-x	:	unbound	Read the name of an editor command and execute it. A restricted set of editing functions is available in the mini-buffer. Keys are looked up in the special command keymap, and if not found there in the main keymap. An interrupt signal, as defined by the stty setting, will abort the function. The allowed func‐ tions are: backward-delete-char, vi-backward-delete-char, clear-screen, redisplay, quoted-insert, vi-quoted-insert, backward-kill-word, vi-backward-kill-word, kill-whole-line, vi-kill-line, backward-kill-line, list-choices, delete-char-or-list, complete-word, accept-line, expand-or-complete and expand-or-com‐ plete-prefix. kill-region kills the last word, and vi-cmd-mode is treated the same as accept-line. The space and tab characters, if not bound to one of these functions, will complete the name and then list the possibilities if the AUTO_LIST option is set. Any other character that is not bound to self-insert or self-insert-unmeta will beep and be ignored. The bindings of the current insert mode will be used. Currently this command may not be redefined or called by name.
execute-last-named-cmd	ESC-z	unbound	unbound	Redo the last function executed with execute-named-cmd. Currently this command may not be redefined or called by name.
get-line	ESC-G ESC-g	unbound	unbound	Pop the top line off the buffer stack and insert it at the cursor position.
pound-insert	unbound	#	unbound	If there is no # character at the beginning of the buffer, add one to the beginning of each line. If there is one, remove a # from each line that has one. In either case, accept the current line. The INTERACTIVE_COMMENTS option must be set for this to have any usefulness.
vi-pound-insert				If there is no # character at the beginning of the current line, add one. If there is one, remove it. The INTERACTIVE_COMMENTS option must be set for this to have any usefulness.
push-input				Push the entire current multiline construct onto the buffer stack and return to the top-level (PS1) prompt. If the current parser construct is only a single line, this is exactly like push-line. Next time the editor starts up or is popped with get-line, the construct will be popped off the top of the buffer stack and loaded into the editing buffer.
push-line	^Q ESC-Q ESC-q	unbound	unbound	Push the current buffer onto the buffer stack and clear the buffer. Next time the editor starts up, the buffer will be popped off the top of the buffer stack and loaded into the editing buffer.
push-line-or-edit				At the top-level (PS1) prompt, equivalent to push-line. At a secondary (PS2) prompt, move the entire current multiline construct into the editor buffer. The latter is equivalent to push-input followed by get-line.
read-command				Only useful from a user-defined widget. A keystroke is read just as in normal operation, but instead of the command being executed the name of the command that would be executed is stored in the shell parameter REPLY. This can be used as the argument of a future zle command. If the key sequence is not bound, status 1 is returned; typically, however, REPLY is set to undefined-key to indicate a useless key sequence.
recursive-edit				Only useful from a user-defined widget. At this point in the function, the editor regains control until one of the standard widgets which would normally cause zle to exit (typically an accept-line caused by hitting the return key) is executed. Instead, control returns to the user-defined widget. The status returned is non-zero if the return was caused by an error, but the function still continues executing and hence may tidy up. This makes it safe for the user-defined widget to alter the command line or key bindings temporarily. The following widget, caps-lock, serves as an example. self-insert-ucase() { LBUFFER+=${(U)KEYS[-1]} } integer stat zle -N self-insert self-insert-ucase zle -A caps-lock save-caps-lock zle -A accept-line caps-lock zle recursive-edit stat=$? zle -A .self-insert self-insert zle -A save-caps-lock caps-lock zle -D save-caps-lock (( stat )) && zle send-break return $stat This causes typed letters to be inserted capitalised until either accept-line (i.e. typically the return key) is typed or the caps-lock widget is invoked again; the later is handled by saving the old definition of caps-lock as save-caps-lock and then rebinding it to invoke accept-line. Note that an error from the recursive edit is detected as a non-zero return status and propagated by using the send-break widget.
redisplay	unbound	^R	^R	Redisplays the edit buffer.
reset-prompt	unbound	unbound	unbound	Force the prompts on both the left and right of the screen to be re-expanded, then redisplay the edit buffer. This reflects changes both to the prompt vari‐ ables themselves and changes in the expansion of the values (for example, changes in time or directory, or changes to the value of variables referred to by the prompt). Otherwise, the prompt is only expanded each time zle starts, and when the display as been interrupted by output from another part of the shell (such as a job notification) which causes the command line to be reprinted.
send-break	^G ESC-^G	unbound	unbound	Abort the current editor function, e.g. execute-named-command, or the editor itself, e.g. if you are in vared. Otherwise abort the parsing of the current line.
run-help	ESC-H ESC-h	unbound	unbound	Push the buffer onto the buffer stack, and execute the command ‘run-help cmd’, where cmd is the current command. run-help is normally aliased to man.
vi-set-buffer	unbound	”	unbound	Specify a buffer to be used in the following command. There are 35 buffers that can be specified: the 26 ‘named’ buffers “a to “z and the nine ‘queued’ buf‐ fers “1 to “9. The named buffers can also be specified as “A to “Z. When a buffer is specified for a cut command, the text being cut replaces the previous contents of the specified buffer. If a named buffer is specified using a capital, the newly cut text is appended to the buffer instead of overwriting it. If no buffer is specified for a cut command, “1 is used, and the contents of “1 to “8 are each shifted along one buffer; the contents of “9 is lost.
vi-set-mark	unbound	m	unbound	Set the specified mark at the cursor position.
set-mark-command	^@	unbound	unbound	Set the mark at the cursor position. If called with a negative prefix argument, do not set the mark but deactivate the region so that it is no longer high‐ lighted (it is still usable for other purposes). Otherwise the region is marked as active.
spell-word	ESC-$ ESC-S ESC-s	unbound	unbound	Attempt spelling correction on the current word.
undefined-key				This command is executed when a key sequence that is not bound to any command is typed. By default it beeps.
undo	^_ ^Xu ^X^U	unbound	unbound	Incrementally undo the last text modification.
redo				Incrementally redo undone text modifications.
vi-undo-change	unbound	u	unbound	Undo the last text modification. If repeated, redo the modification.
what-cursor-position	^X=	unbound	unbound	Print the character under the cursor, its code as an octal, decimal and hexadecimal number, the current cursor position within the buffer and the column of the cursor in the current line.
where-is				Read the name of an editor command and and print the listing of key sequences that invoke the specified command. A restricted set of editing functions is available in the mini-buffer. Keys are looked up in the special command keymap, and if not found there in the main keymap.
which-command	ESC-?	unbound	unbound	Push the buffer onto the buffer stack, and execute the command ‘which-command cmd’. where cmd is the current command. which-command is normally aliased to whence.
vi-digit-or-beginning-of-line	unbound	0	unbound	If the last command executed was a digit as part of an argument, continue the argument. Otherwise, execute vi-beginning-of-line.

Source

History setup

Command prompt

PS1 - for left prompt
RPS1 - for right prompt
look into zshmisc(EXPANSION OF PROMPT SEQUENCES)

Completion system

TODO

kucaahbe's notes