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#!/bin/sh
#
# Permission to use, copy, modify, and/or distribute this software for
# any purpose with or without fee is hereby granted.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
# AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#
# shellcheck disable=SC2086

if [ "$#" -eq 0 ]; then
    echo "Usage: $0 manpage-directory..."
    exit 1
fi

if ! command -v mandoc > /dev/null; then
    echo "skipping mancheck because mandoc is not installed"
    exit 0
fi

IFS="
"

files="$(find "$@" -type f -name '*[1-9]*' ! -name '*module-param*' ! -name 'zpool-features*' ! -name 'zfs-mount-generator*')" || exit 1

add_excl="$(awk '
    /^.\\" lint-ok:/ {
        print "-e"
        $1 = "mandoc:"
        $2 = FILENAME ":[[:digit:]]+:[[:digit:]]+:"
        print
    }' $files)"

# Redirect to file instead of 2>&1ing because mandoc flushes inconsistently(?) which tears lines
# https://github.com/openzfs/zfs/pull/12129/checks?check_run_id=2701608671#step:5:3
etmp="$(mktemp)"
! { mandoc -Tlint $files 2>"$etmp"; cat "$etmp"; rm -f "$etmp"; } |
    grep -vE -e 'mandoc: outdated mandoc.db' -e 'STYLE: referenced manual not found' $add_excl >&2