Section: User Contributed Perl Documentation (1p)
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cleo - Play back shell commands for live demonstrations
is a utility for playing back pre-recorded shell commands in a live
displays the commands as if you had actually typed
them and then executes them interactively.
There is probably an easy way to do this with "expect" or a similar tool.
But I couldn't figure it out, so I built this. Your mileage may vary.
always pauses and waits for a keypress before displaying a command and
before executing it. Pressing any key besides those listed below will advance
s skip the current command
r redo the current command
p redo the previous command
q quit playback
reads commands from a file. Each line is treated as one command.
Blank lines and those starting with "#"
will be ignored. The commands
themselves can be anything that you would type into an interactive shell.
You can also add a few special tokens that "cleo"
Commands starting with "!!!" (three exclamation points) are not displayed and
will be executed immediately. This is useful for running setup commands at the
beginning of your demonstration.
Within a command, "%%%" (three percent signs) will cause "cleo" to pause and
wait for a keypress before displaying the rest of the command. This is useful
if you want to stop in the middle of a command to give some explanation.
Otherwise, "cleo" displays and executes the commands verbatim. Note that
some interactive commands like "vim" are picky about STDOUT and STDIN. To
make them work properly with "cleo", you may need to force them to attach
to the terminal like this:
(exec < /dev/tty vim)
I use this for giving demonstrations of pinto, such as the one seen at
> (the live demonstration part
starts around 10:47).
The command file that I use for that presentation is included inside this
distribution at examples/pinto.demo. This file is for illustration only,
so don't expect it to actually work for you.
only works on Unix-like platforms. It may work on Windows if you use
Cygwin. Personally, I have only used "cleo"
on Mac OS X.
- Jump to arbitrary command number
- Support backspacing in recorded command
- Support multi-line recorded commands
- Write unit tests
Jeffrey Ryan Thalhammer <email@example.com
Copyright (c) 2014, Imaginative Software Systems