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config

To set up a new computer, use some subset of the following:

apt-get install -y git
cd ~
git clone https://github.com/philips/ghar.git
export PATH=$PATH:`pwd`/ghar/bin/
cd ghar
git clone https://github.com/stroxler/config.git
cd ~
rm .bashrc
ghar install
ghar install --status
~/setup_vim.sh

The ghar install does not define your .bashrc, because it's a good place to put machine-specific environment variables and aliases. So you need to add the following line:

source $HOME/bash-source.sh

NOTE: the instructions above are a bit out of date; ghar was never updated for python3, so I wrote a small haskell tool that does something similar. You can check out how I currently do the setup in https://github.com/stroxler/confar-v0

vim tips

A few vim notes, nowhere near complete.

copy or move lines

The command to copy (t) or move (m) lines of text:

:[range]{t, m}[address]

For example:

  • :10t20 insert copy of line 10 on a new line after line 20
  • :10m20 move line 10 to a new line after line 20
  • :10t. insert copy of line 10 on a new line after current line
  • :10,13t20 insert copy of lines 10-13 on new lines after line 20
  • 4:t$ insert copy of next 4 lines at end of file
  • 4:t0 insert copy of next 4 lines at top of file
  • :t14 insert copy of current line after line 14

text object commands

"A command using a motion, e.g., cw, operates from the current cursor position. A command using a text-object, e.g., ciw operates on the whole object regardless of the cursor position."

Text object commands have the form:

{command} {extent} {object}

where:

command c (change), d (delete), v (select), y (yank), etc
extent i (inner), a (include enclosing quotes, parentheses, etc)
object w (word), s (sentence), p (paragraph), ", ), etc i is a new one, added by the indent-object plugin.

Examples:

  • diw delete current word
  • vaw select current word plus trailing whitespace on one side of word
  • vip select current paragraph
  • vis select current sentence (or block of code!)
  • ci) change everything between enclosing parentheses (or use ", ', ], etc)
  • ca) same as above but include parentheses
  • >ip indent inner paragraph

Many text object commands have motion command equivalents. For example viw is the same as bve (or ve if the cursor is already on the first character of the word).

When using a command like ci" the cursor does not have to be between the quotes. It will change the text of the next quoted string on the current line.

I use a vim plugin to make indent objects that can be used to select text at the current indentation level or higher. It is useful for treating Python code in a if or for loop as a text object. For example, the command cii changes all code that is indented as much as the current line or more.

insert mode

  • <C-t> insert one shiftwidth of indent at the start of current line
  • <C-d> delete one shiftwidth of indent at the start of current line
  • <C-w> delete word to the left of cursor (same as bash)
  • <C-u> delete back to start of line (same as bash)
  • <C-r>0 paste yank register
  • <C-r>" paste unnamed register
  • <C-r>=6*35<CR> inserts 210

normal mode

  • v/foo select from cursor to "foo" (n for next; v?foo backwards)
  • ev2B select current WORD and previous word
  • ^2X move current line two spaces left
  • [n]H move cursor to nth line of screen
  • M move cursor to middle line of screen
  • [n]L move cursor to nth line from bottom of screen
  • zz center screen on cursor
  • gv select last visual selection, enter visual mode
  • gp, gP same as p, P but leaves cursor at end
  • 1$, 2$ end of current, next line, etc.

ex mode

  • :s/^/ / move current line two spaces right
  • :7pu put yanked text on new line after line 7
  • :7pu! put yanked text on new line before line 7
  • 4: shorthand for range :.,.+3
  • <C-w> delete word to the left of cursor (same as bash)
  • <C-u> delete back to start of line (same as bash)

visual mode

  • gv highlight last visual selection (useful b/c commands leave visual)
  • o go to other end of highlighted text
  • u, U change selection to lower, upper case
  • I, A insert at start, end of selection (i, a don't work)
  • p replaces selection

registers

  • "" unnamed, used by c, d, y, x, s, etc.
  • "0 yank
  • "- deleted or changed text less than one line
  • "+ system clipboard
  • "* last system-selected text
  • ". last inserted text
  • "{1-9} most recent "1, second most recent "2, etc. delete

automatic marks

From 'Practical Vim' by Drew Neil:

  • `` position before the last jump within current file
  • `. location of last change
  • `^ location of last insert
  • `[, `] start, end of last change or yank
  • `<, `> start, end of last visual selection

references

If you read this far then you wasted your time. You should have been reading 'Practical Vim' by Drew Neil.

bash

  • <C-b>, <C-f> move backward, forward one character
  • <C-a>, <C-e> go to start, end of line
  • <M-b>, <M-f> move backward, forward one word (whitespace defined)
  • <C-u>, <C-k> delete from cursor to beginning, end of line
  • <C-w>, <M-d> delete from cursor to previous, next whitespace
  • <C-y> paste previous deletion
  • <C-t>, <M-t> swap current character, word with previous