Command-specific Bash filename completions for application aliases

app-alias-completion.sh

## Applications
# alias acorn="open -a Acorn"
# alias alpha="open -a ImageAlpha"
# alias tp="open -a TaskPaper"
# alias byword="open -a Byword"
# alias xc="open -a Xcode"
#
## subp is a custom function for finding Sublime projects

function _complete_app_alias()
{
	local cmd="${1##*/}"
	local word=${COMP_WORDS[COMP_CWORD]}
	local line=${COMP_LINE}
	local patt

	# Check to see what command is being executed.
	case "$cmd" in
	esp)
		patt='!*.espresso-proj'
		;;
	subp|sublp)
		patt='!*.sublime-project'
		;;
	xc)
		patt='!*.xcodeproj'
		;;
	tp)
		patt='!*.taskpaper'
		;;
	alpha)
		patt='!*.png'
		;;
	byword|mmdc)
		patt='!*.md'
		;;
	esac

	COMPREPLY=($(compgen -f -X "$patt" -- "${word}"))
}

complete -o bashdefault -o dirnames -o filenames -o default -o nospace -F _complete_app_alias sublp subp esp xc tp alpha byword mmdc || \
complete -o default -o dirnames -o filenames -o nospace -F _complete_app_alias sublp subp esp xc tp alpha byword mmdc