Auto-complete to multiple possible file extensions

_complete_open() {
        COMPREPLY=()
        local cur="${COMP_WORDS[$COMP_CWORD]}"
        local prev="${COMP_WORDS[COMP_CWORD-1]}"
        [[ "$cur" == -* || "$prev" != '-a' ]] && return
        apps="$(mdfind kMDItemKind==Application -onlyin /Applications -onlyin ~/Applications -onlyin /Developer -onlyin ~/Developer | grep -v '/.*/.*/.*/.*/' | sed -E 's|.*/||g;s|\.app$||g' | uniq)"$'Finder\nArchive Utility\nCharacterPalette\nKeyboardViewer'
        local IFS=$'\n'
        if [[ "${cur:0:1}" = '"' || "${cur:0:1}" = "'" ]]; then
            quote="${cur:0:1}"
            cur="${cur:1}"
        fi
        local found="$(grep -i "^$cur" <<< "$apps")"
        if [[ "$quote" == '"' ]]; then
            found="$(sed "s|^|\"|g;s|$|\"|g" <<< "$found")"
        elif [[ "$quote" == "'" ]]; then
            found="$(sed "s|^|'|g;s|$|'|g" <<< "$found")"
        else
            found="$(sed 's| |\\ |g' <<< "$found")"
        fi
        COMPREPLY=($found)
}

complete -o default -F _complete_open open

Third version, which should now both be case insensitive and work within quotes.

ok, so I needed the git autocompletion script.

I got that from this url:

curl https://raw.githubusercontent.com/git/git/master/contrib/completion/git-completion.bash -o ~/.git-completion.bash

No need to worry about what directory you're in when you run this as your home directory(~) is used with the target.

Then I added to my ~/.bash_profile file the following 'execute if it exists' code:

if [ -f ~/.git-completion.bash ]; then
  . ~/.git-completion.bash
fi

Update: I'm making these bits of code more concise to shrink down my .bashrc file, in this case I now use:

test -f ~/.git-completion.bash && . $_

Note: $_ means the last argument to the previous command. so . $_ means run it - "it" being .git-completion.bash in this case

This still works on both Ubuntu and OSX and on machines without the script .git-completion.bash script.

Now git Tab (actually it's git TabTab ) works like a charm!

p.s.: If this doesn't work off the bat, you may need to run chmod u+x ~/.git-completion.bash to grant yourself the necessary permission:

• chmod is the command that modifies file permissions
• u means the user that owns the file, by default its creator, i.e. you
• + means set/activate/add a permission
• x means execute permission, i.e. the ability to run the script