An ersatz-emacs text editor for unix-like systems (and msys, hence the name!) with no dependencies. It's not much, but it punches above its weight class!
You will need to be running on msys2 proper, not the mingw64 version, because you need termios (sorry, but it's a must). Install the compliers and libraries:
pacman -S msys2-devel msys2-runtime-develThen, make && make install and you should be laughing.
No dependencies (yet), so long as you have make and a C compiler you should
be able to just make && sudo make install.
emsys is not a 'modal' editor - text entered goes straight into the buffer,
without having to enter an insert mode.
Keybindings below are described in the usual Emacs format (C-x means
Control-x, M-x means Alt-x or Escape then x).
C-@C-x C-s - Save bufferC-x k - Kill bufferC-x C-f - Open fileC-x C-c - QuitM-x ... - Run named commandM-x version - Display version informationC-n or DOWN - Move cursor to next lineC-p or UP - Move cursor to previous lineC-f or RIGHT - Move cursor forwardC-b or LEFT - Move cursor backwardM-f - Move cursor forward wordM-b - Move cursor backward wordM-n - Move cursor to next paragraphM-p - Move cursor to previous paragraphM-< - Move cursor to start of bufferM-> - Move cursor to end of bufferC-a or HOME - Move cursor to start of lineC-e or END - Move cursor to end of lineC-v or PGDN - Move cursor down a page/screenC-z or M-v or PGUP - Move cursor up a page/screenC-s - SearchM-g - Goto line numberC-_ - Undo (this is Control-/ on most terminals)C-x C-_ - Redo (keep pressing C-_ to keep redoing)C-@ - Set mark (this is Control-SPACE on most terminals)C-x C-x - Swap mark and pointC-x h - Mark the entire bufferC-w - Kill (cut) current regionM-w - Copy current regionC-y - Yank (paste)M-| - Filter region through shell command. This even works with pipes!C-j - Insert a newline and indent (indentation copied from previous line)C-o - Insert a newline but do not move the pointC-i (TAB) - Indent current line by either one tab or the current space
indentation level. To insert a literal tab, C-q C-iC-d or DELETE - Delete forwardsM-BACKSPACE - Delete backwards wordM-d - Delete forwards wordC-u - Delete to beginning of lineC-k - Delete to end of lineM-% - Query replace, that is, interactive search and replace. Emsys' version
works very much like GNU Emacs', save for the fact that we
don't have recursive editing, so C-r just replaces the current occurrence
with the string prompted for without changing the replacement.M-x replace-string - Replace one string with another in the regionM-x replace-regexp - Replace first match of given regular expression per
line in the region with given stringM-x indent-tabs - Use tabs for indentation in current buffer (the default)M-x indent-spaces - Use spaces for indentation in current buffer. You will
be prompted for the number of spaces to use.M-x whitespace-cleanup - Cleanup whitespace in current buffer. Beware, this
clears the undos and redos.C-t - Transpose (swap) characters around cursor, e.g. a|b -> b|aM-t - Transpose wordsM-u - Uppercase word (foo -> FOO)M-l - Lowercase word (FOO -> foo)M-c - Capitalize word (foo -> Foo)C-q - Insert next character raw (allowing you to enter e.g. raw control
characters - be careful with nulls!)M-/ - Autocomplete current "word" (one or more alphanumeric or unicode
characters). E.g. foo -> foobar.Note that commands dealing with capitalization only work for ASCII letters - any other characters will be ignored.
If you want to change how paragraph and word endings are calculated, edit the
file bound.c.
C-x b - Switch bufferC-x <left> - Previous bufferC-x <right> - Next bufferC-x o - Switch windowC-x 0 - Kill current windowC-x 1 - Kill other windows (make current the only one)C-x 2 - Create new windowC-l - Center cursor in windowM-x toggle-truncate-lines or C-x x t - Toggles line wrap off/onC-x ( - Start defining keyboard macroC-x ) - Stop defining keyboard macroC-x e - Execute macro (stopping definition if currently defining) - press
e again to repeat the macroC-x C-z - Suspend emsys. Most of the time this will take you back to the
shell, where you can run fg to return emsys to the foreground.M-x revert - Reload file on disk into current buffer. Useful if you want to
use sed, go fmt, etc. to do text operations on files.C-x = - Describe cursor position (displays information about character at
point)M-0 to M-9 - Type in universal argument (in most cases, this just repeats
the next command typed N times). E.g. M-8 M-0 * will type 80 asterisks.Registers let you store a point, string (region), rectangle (see below), number,
or keyboard macro. Every register has a name, which must be one ASCII character
(including control characters, except C-g since that's the universal cancel
button).
C-x r j - Jump to point stored in registerC-x r a - Store macro in register. Also C-x r m, for now at least.C-x r n - Store number (i.e. universal argument entered with alt-numbers)
in register.C-x r C-@ or C-x r SPACE - Store point in register.C-x r s - Store region (string) in register.C-x r + - Increment number in register, or add region to string in register.C-x r v or M-x view-register - View contents of register.C-x r r - Copy rectangle to register.Rectangles are the rectangular space between point and mark; all characters from the leftmost column to the rightmost column within the topmost line to the bottommost line.
C-x r t - string-rectangle: Replace rectangle contents with given string on
each line.C-x r k or C-x r C-w - kill-rectangle: Kill (cut) rectangle.C-x r M-w - copy-rectangle: Copy rectangleC-x r y - yank-rectangle: Yank (paste) rectangle.C-x r r - rectangle-to-register: Copy rectangle to register.emsys uses kokke's tiny-regex-c for regular expression support, and has the following syntax for regular expressions:
. Dot, matches any character^ Start anchor, matches beginning of string$ End anchor, matches end of string* Asterisk, match zero or more (greedy)+ Plus, match one or more (greedy)? Question, match zero or one (non-greedy)[abc] Character class, match if one of {'a', 'b', 'c'}[^abc] Inverted class, match if NOT one of {'a', 'b', 'c'}[a-zA-Z] Character ranges, the character set of the ranges { a-z | A-Z }\s Whitespace, \t \f \r \n \v and spaces\S Non-whitespace\w Alphanumeric, [a-zA-Z0-9_]\W Non-alphanumeric\d Digits, [0-9]\D Non-digitsLicensed MIT.