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# Invoke (pyinvoke.org) tab-completion script to be sourced with Bash shell.
# Known to work on Bash 3.x, untested on 4.x.
_complete_invoke() {
local candidates
# COMP_WORDS contains the entire command string up til now (including
# program name).
# We hand it to Invoke so it can figure out the current context: spit back
# core options, task names, the current task's options, or some combo.
candidates=`invoke --complete -- ${COMP_WORDS[*]}`
# `compgen -W` takes list of valid options & a partial word & spits back
# possible matches. Necessary for any partial word completions (vs
# completions performed when no partial words are present).
#
# $2 is the current word or token being tabbed on, either empty string or a
# partial word, and thus wants to be compgen'd to arrive at some subset of
# our candidate list which actually matches.
#
# COMPREPLY is the list of valid completions handed back to `complete`.
COMPREPLY=( $(compgen -W "${candidates}" -- $2) )
}
# Tell shell builtin to use the above for completing 'inv'/'invoke':
# * -F: use given function name to generate completions.
# * -o default: when function generates no results, use filenames.
# * positional args: program names to complete for.
complete -F _complete_invoke -o default invoke inv
# vim: set ft=sh :
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