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#!/bin/sh
# Compares options in `rg --help` output to options in zsh completion function
set -e
main() {
local rg="target/${TARGET}/release/rg"
local _rg='complete/_rg'
local ret='0'
local helpTemp="$( mktemp )"
local compTemp="$( mktemp )"
local diff
[ -e "${rg}" ] || rg="target/${TARGET}/debug/rg"
if [ ! -e "${rg}" ]; then
printf 'File not found: %s\n' "${rg}" >&2
ret='1'
elif [ ! -e "${_rg}" ]; then
printf 'File not found: %s\n' "${_rg}" >&2
ret='1'
else
# 'Parse' options out of the `--help` output. To prevent false positives
# we only look at lines where the first non-white-space character is `-`
"${rg}" --help |
"${rg}" -- '^\s*-' |
"${rg}" -io -- '[\t ,](-[a-z0-9]|--[a-z0-9-]+)\b' |
tr -d '\t ,' |
sort -u > "${helpTemp}"
# 'Parse' options out of the completion-function file. To prevent false
# negatives, we:
#
# * Exclude lines that look like comments
# * Exclude lines that don't appear to have a bracketed description
# suitable for `_arguments`
# * Exclude those bracketed descriptions so we don't match options
# which might be referenced in them
# * Exclude parenthetical lists of exclusive options so we don't match
# those
#
# This does of course make the following assumptions:
#
# * Each option definition is on its own (single) line
# * Each option definition has a description
# * Option names are static — i.e., they aren't constructed from
# variables or command substitutions. Brace expansion is OK as long as
# each component of the expression is a complete option flag — in
# other words, `{--foo,--bar}` is valid, but `--{foo,bar}` is not
"${rg}" -v -- '^\s*#' "${_rg}" |
"${rg}" --replace '$1' -- '^.*?(?:\(.+?\).*?)?(-.+)\[.+\].*' |
tr -d "\t (){}*=+:'\"" |
tr ',' '\n' |
sort -u > "${compTemp}"
diff="$(
if diff --help 2>&1 | grep -qF -- '--label'; then
diff -U2 \
--label '`rg --help`' \
--label "${_rg}" \
"${helpTemp}" "${compTemp}" || true
else
diff -U2 \
-L '`rg --help`' \
-L "${_rg}" \
"${helpTemp}" "${compTemp}" || true
fi
)"
[ -n "${diff}" ] && {
printf '%s\n' 'zsh completion options differ from `--help` options:' >&2
printf '%s\n' "${diff}" >&2
ret='1'
}
fi
rm -f "${helpTemp}" "${compTemp}"
return "${ret}"
}
main "${@}"
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