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# Completion setup for Make, completing targets
_make() {
# Bail if no legible Makefile
[[ -r Makefile ]] || return 1
# Iterate through the Makefile, line by line
while IFS= read -r line ; do
case $line in
# We're looking for targets but not variable assignments
$'\t'*) ;;
*:=*) ;;
*:*)
# Break the target up with space delimiters
local -a targets
IFS=' ' read -rd '' -a targets < \
<(printf '%s\0' "${line%%:*}")
# Iterate through the targets and add suitable ones
local target
for target in "${targets[@]}" ; do
case $target in
# Don't complete special targets beginning with a
# period
.*) ;;
# Don't complete targets with names that have
# characters outside of the POSIX spec (plus slashes)
*[^[:word:]./-]*) ;;
# Add targets that match what we're completing
${COMP_WORDS[COMP_CWORD]}*)
COMPREPLY[${#COMPREPLY[@]}]=$target
;;
esac
done
;;
esac
done < Makefile
}
complete -F _make -o default make
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