scripts/LinuxManBook/build_linux_man_book.sh: Use pipes instead of temporary files

It's still easy to debug, by inserting |tee /dev/tty|, but the script
is cleaner if it doesn't generate intermediary files, and it's also
faster (on my desktop computer, it goes down from 18.5 s to 16.3 s).

Signed-off-by: Alejandro Colomar <alx@kernel.org>

1 files changed, 15 insertions, 15 deletions

diff --git a/scripts/LinuxManBook/build_linux_man_book.sh b/scripts/LinuxManBook/build_linux_man_book.sh
index a7bcb61d6..6c0f20891 100755
--- a/scripts/LinuxManBook/build_linux_man_book.sh
+++ b/scripts/LinuxManBook/build_linux_man_book.sh
@@ -2,19 +2,19 @@
 # Copyright 2023, Alejandro Colomar <alx@kernel.org>
 # SPDX-License-Identifier: GPL-3.0-or-later
 
+(
+	./prepare_linux_man_book.pl "$1" \
+	| groff -z -dPDF.EXPORT=1 -dLABEL.REFS=1 -dpaper=a4 -Tpdf -k -pet \
+		-M. -F. -mandoc -manmark -P-pa4 \-rC1 -rCHECKSTYLE=3 2>&1 \
+	| LC_ALL=C grep '^\. *ds ';
 
-./prepare_linux_man_book.pl "$@" >LMBpages.man;
-
-
-groff -z -dPDF.EXPORT=1 -dLABEL.REFS=1 -dpaper=a4 \
-	-Tpdf -k -pet -M. -F. -mandoc -manmark -P-pa4 -rC1 -rCHECKSTYLE=3 \
-	LMBpages.man 2>&1 \
-| LC_ALL=C grep '^\. *ds ' >LMBbkmark.man;
-
-cat LMBbkmark.man LMBpages.man >LMBbody.man;
-preconv LMBbody.man >LMBbody.tbl;
-tbl <LMBbody.tbl >LMBbody.eqn;
-eqn -Tpdf <LMBbody.eqn >LMBbody.pdf.troff.man;
-troff -Tpdf -ms LMBfront.ms >LMBfront.pdf.set;
-troff -Tpdf -M. -F. -mandoc -manmark -dpaper=a4 <LMBbody.pdf.troff.man >LMBbody.pdf.set;
-gropdf -F. LMBfront.pdf.set LMBbody.pdf.set -pa4 >LinuxManBook.pdf;
+	./prepare_linux_man_book.pl "$1";
+) \
+| preconv \
+| tbl \
+| eqn -Tpdf \
+| (
+	troff -Tpdf -ms <LMBfront.ms;
+	troff -Tpdf -M. -F. -mandoc -manmark -dpaper=a4;
+) \
+| gropdf -F. -pa4;