Today I Learned: collection of notes, tips and tricks and stuff I learn from day to day working with computers and technology as an open source contributor and product manager

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Implement tab completions

You can implement your own bash completions for commands you use a lot to save on typing.

An example ackrc based on my TIL

This completion script, reads your $HOME/.ackrc files and offers tab completions for your custom types.

$ ack <tab>

An example ackrc based on my TIL


Would work as follows:

$ ack --<tab>
--mojo --conf

The complete implementation lifted from my github repository.

    local cur prev opts
    local opts=$(sed -n "s/--type-set=\([^']*\)=.*/--\1/p" $HOME/.ackrc )

    COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )

complete -F _ack ack

Since the tab completion is a programmatic implementation, there is a lot you can do to make your day to day work with bash easier.