mancheck: accept lints, accept lint overrides

Reviewed-by: Richard Laager <rlaager@wiktel.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Nguyen <tony.nguyen@delphix.com>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #12129

Makefile.am

@@ -137,12 +137,7 @@ storeabi: lib
 
 PHONY += mancheck
 mancheck:
-	@if type mandoc > /dev/null 2>&1; then \
-		find ${top_srcdir}/man ${top_srcdir}/tests/test-runner/man -type f -name '*[1-9]*' \
-			-exec mandoc -Tlint -Werror {} \+; \
-	else \
-		echo "skipping mancheck because mandoc is not installed"; \
-	fi
+	${top_srcdir}/scripts/mancheck.sh ${top_srcdir}/man ${top_srcdir}/tests/test-runner/man
 
 if BUILD_LINUX
 stat_fmt = -c '%A %n'

scripts/Makefile.am

@@ -17,7 +17,8 @@ EXTRA_SCRIPTS = \
 	kmodtool \
 	make_gitrev.sh \
 	man-dates.sh \
-	paxcheck.sh
+	paxcheck.sh \
+	mancheck.sh
 
 EXTRA_DIST = \
 	cstyle.pl \

scripts/mancheck.sh

@@ -0,0 +1,43 @@
+#!/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