bash/zsh help functions

bash-keys-help.sh

help-history() {
echo -e  "
    List of Event Designators (zshexpn)
    ===================================
    !$                  last word
    !!                  last line
    !:0                 first word from previous command
    !:0-2               first three words
    !!:s^foo^bar^
    ^foo^bar            replace on previous command
    ^foo^bar:G          greedy replace
    !0                  first command-line
    !-1                 previous
    !{str}
    !str                most recent line starting with 'str'
    !?str               containing 'str'
    !#                  current command line
    !#1                 current command line, second parameter
"
}

help-variable() {
echo -e "
    List of parameter expansion (zshexpn)
    =====================================

    \${name}
    \${name-word}       word unless name is set
    \${name+word}       word if name is set
    \${name=word}       name is set to word if unset
    ...
    \${name#pattern}    pattern matches beginning of name, remove match
    \${name%pattern}    pattern matches end of name, remove match
    \${i:s/foo/bar/}
    \$var[(w)1]         split variable by word not char

    Examples:
    \${\${(s.:.)f}[1]}               split \$j by : and return first field
    \${(j.:.)\${(s.:.)f}[2,3]}       split \$j by : and join second and third field by :

"
}

help-keys-long() {
echo -e "
Cutting  & Pasting
===================
cp termine.rdf /tmp/
              ^
ctrl-u                  /tmp/
ctrl-w                  cp /tmp/
ctrl-k                  cp termine.rdf
ctrl-t                  cp termine.rd f/tmp/        # move a letter arround
ctrl-y                  insert last delete

ctrl-k                  kill text to right of cursor. This is the bash equiv. of cut
ctrl-K                  This command deletes from the cursor to the end of the line.
ctrl-y                  yank text. This is the bash equiv.  of paste
ctrl-d                  delete
Esc-Del                 Delete word to the left of the cursor

History
========
ctrl-r                  reverse search (semi-interactive)
ctrl-n                  next history
ctrl-p                  prev history
ctrl-o                  switch and execute last two commands (?)
ctrl-O                  exec command an reuse

Movement
=========
ctrl-x x                jump to beginning of line / jump back
ctrl-p                  previous command. This is the same as the up arrow
ctrl-n                  next charachter. self explanitory
ctrl-b                  left one charachter aka back or left arrow
ctrl-f                  forward one charachter or right arrow
ctrl-a                  beginning of line. this is also useful in long commands if you just want to change the first part
Esc-b                   Move cursor to the beginning of the word to the left
Esc-f                   Move cursor to the beginning of the word to the right

Misc
=========
ctrl-v                  next control key is shown in cmdline (usefull for bind)
ctrl-s                  suspend output (turn behaviour off with stty -ixon -ixoff)
ctrl-q                  resume output
ctrl-z                  suspend running process (fg to continue, fg %2 for previously suspended)
ctrl-d                  exit from shell by sending EOF
ctrz-c                  terminate process by sending SIGINT

"
}

# command line editing keys
help-keys() {
echo -e "

    alt-b   word backward
    alt-f   word forward
    alt-h   help on current command?

    esc-backspace delete word
    esc-q   kill line, restore after next command
    esc-t   transpose words

    ctrl-a  jump to beginning of line
    ctrl-b  backward char
    ctrl-d  delete char
    ctrl-e  jump to end of line
    ctrl-f  forward char
    ctrl-k  kill to eol
    ctrl-n  history next
    ctrl-o  in history, execute command, bring up next
    ctrl-p  history prev
    ctrl-r  search history
    ctrl-s  forward search?
    ctrl-w  kill last word
    ctrl-x  jump start, again jump back?
    ctrl-y  yank copied text

"
}