[gentoo-dev] [PATCH 1/3] texlive-module.eclass: do not treat grep returning 1 as error

[Florian Schmaus <flow@gentoo.org>]

In case every man page of the dev-texlive/* package is filtered, because
the man pages are already installed by texlive-core, grep returns an
exit status of 1, which we must not treat as an error condition.

Adjust the PIPESTATUS comparison accordingly.

Closes: https://bugs.gentoo.org/931994
Signed-off-by: Florian Schmaus <flow@gentoo.org>
---
 eclass/texlive-module.eclass | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/eclass/texlive-module.eclass b/eclass/texlive-module.eclass
index 0daca41961ff..b202a0188b66 100644
--- a/eclass/texlive-module.eclass
+++ b/eclass/texlive-module.eclass
@@ -539,7 +539,10 @@ texlive-module_src_install() {
 			find texmf-dist/doc/man -type f -name '*.[0-9n]' -print |
 				grep -v "${grep_expressions[@]}" |
 				xargs -d '\n' --no-run-if-empty doman
-			[[ "${PIPESTATUS[*]}" =~ ^0(" 0")*$ ]]
+			# The grep in the middle of the pipe may return 1 in case
+			# everything from the input is dropped.
+			# See https://bugs.gentoo.org/931994
+			[[ "${PIPESTATUS[*]}" == "0 "[01]" 0" ]]
 			eend $? || die "error installing man pages"
 
 			# Delete all man pages under texmf-dist/doc/man
-- 
2.44.1