bash snippets for working with aliases

makeAliasFromLastCommand.sh

# Requires bash, history, tail, cut, echo, and sed (if you have bash you probably 
# don't need to install anything).

# Takes a alias name and gets the last command from the history. Makes it an
# alias and puts it in .bash_aliases. Be sure to source .bash_aliases in .bashrc
# or this wont work.
makeAlias() 
{
if [ $# -eq 0 ]; then
    echo "No arguments supplied. You need to pass an alias name"
else 
   newAlias=$(history | tail -n 2 | cut -c 8- | sed -e '$ d')
   escapedNewAlias=${newAlias//\'/\'\\\'\'}
   echo "alias $1='${escapedNewAlias}'" >> ~/.bash_aliases
   . ~/.bashrc
fi 
}

makeFunctionFromHistory.sh

# Requires bash,fzf,awk,fc,echo,and cat to run (you're probably missing fzf).

# Make a function from history and put it in .bash_functions named after w/e is in $1.

makeMacro () {
    if [ $# -eq 0 ]; then
        echo "No arguments supplied. You need to pass a name"
    else 
        commands="$(fc -rl -40 | fzf -m | awk -F $'\t ' '{print $2}')"

        if [ -z "$commands" ]
	then
            echo "No commands selected. Be sure to use Tab to select sections
	    of your history and enter when you're done."
        else 
# ugly block but it doesn't seem to work any other way
cat <<EOF >> ~/.bash_functions
$1 () {
    $commands
}
EOF

            echo $out
            . ~/.bashrc
        fi
    fi
}

I saw redo on Hacker News and realized it looked familiar to a bash script I wrote years ago powered by FZF so I'm shamelessly sharing this for internet points.

IMO, Redo and my script are 'fine' but, day to day, I make aliases from the last command I run a lot more often. Enjoy!