#! /bin/sh

# What happens when a manual page changes from a regular file to a symbolic
# link and back?
#   https://bugs.debian.org/490582

: "${srcdir=.}"
# shellcheck source-path=SCRIPTDIR
. "$srcdir/testlib.sh"

: "${MANDB=mandb}"
: "${ACCESSDB=accessdb}"

init
fake_config /usr/share/man
MANPATH="$tmpdir/usr/share/man"
export MANPATH
db_ext="$(db_ext)"

write_page fs 5 "$tmpdir/usr/share/man/man5/fs.5.gz" \
	UTF-8 gz t 'fs \- fs(5)'
run $MANDB -C "$tmpdir/manpath.config" -u -q "$tmpdir/usr/share/man"
cat >"$tmpdir/1.exp" <<EOF
fs -> "- 5 5 MTIME A - - gz fs(5)"
EOF
accessdb_filter "$tmpdir/usr/share/man/index$db_ext" >"$tmpdir/1.out"
expect_files_equal 'fs(5) setup' "$tmpdir/1.exp" "$tmpdir/1.out"

./fspause
write_page filesystems 5 "$tmpdir/usr/share/man/man5/filesystems.5.gz" \
	UTF-8 gz t 'filesystems \- filesystems(5)'
ln -sf filesystems.5.gz "$tmpdir/usr/share/man/man5/fs.5.gz"
run $MANDB -C "$tmpdir/manpath.config" -u -q "$tmpdir/usr/share/man"
cat >"$tmpdir/2.exp" <<EOF
filesystems -> "- 5 5 MTIME A - - gz filesystems(5)"
fs -> "- 5 5 MTIME B - - gz filesystems(5)"
EOF
accessdb_filter "$tmpdir/usr/share/man/index$db_ext" >"$tmpdir/2.out"
expect_files_equal 'mandb notices regular file -> symlink' \
	"$tmpdir/2.exp" "$tmpdir/2.out"

./fspause
ln -sf fs.5.gz "$tmpdir/usr/share/man/man5/fs2.5.gz"
run $MANDB -C "$tmpdir/manpath.config" -u -q "$tmpdir/usr/share/man"
cat >"$tmpdir/3.exp" <<EOF
filesystems -> "- 5 5 MTIME A - - gz filesystems(5)"
fs -> "- 5 5 MTIME B - - gz filesystems(5)"
fs2 -> "- 5 5 MTIME B - - gz filesystems(5)"
EOF
accessdb_filter "$tmpdir/usr/share/man/index$db_ext" >"$tmpdir/3.out"
expect_files_equal 'mandb notices two-level symlink' \
	"$tmpdir/3.exp" "$tmpdir/3.out"

./fspause
rm -f "$tmpdir/usr/share/man/man5/fs.5.gz"
write_page fs 5 "$tmpdir/usr/share/man/man5/fs.5.gz" \
	UTF-8 gz t 'fs \- new fs(5)'
run $MANDB -C "$tmpdir/manpath.config" -u -q "$tmpdir/usr/share/man"
cat >"$tmpdir/4.exp" <<EOF
filesystems -> "- 5 5 MTIME A - - gz filesystems(5)"
fs -> "- 5 5 MTIME A - - gz new fs(5)"
fs2 -> "- 5 5 MTIME B - - gz filesystems(5)"
EOF
accessdb_filter "$tmpdir/usr/share/man/index$db_ext" >"$tmpdir/4.out"
expect_files_equal 'mandb notices symlink -> regular file' \
	"$tmpdir/4.exp" "$tmpdir/4.out"

finish
