From 4af509c34f202b102c0f6e0314633e1cbcd119dc Mon Sep 17 00:00:00 2001
From: Alejandro Colomar <alx@kernel.org>
Date: Tue, 12 Mar 2024 18:45:42 +0100
Subject: scripts/LinuxManBook/build.sh, share/mk/: Use command variables

Signed-off-by: Alejandro Colomar <alx@kernel.org>
---
 scripts/LinuxManBook/build.sh                  | 30 +++++++++++++++++---------
 share/mk/build/book.mk                         | 10 +++++++++
 share/mk/configure/build-depends/coreutils.mk  |  1 +
 share/mk/configure/build-depends/groff-base.mk |  6 ++++++
 4 files changed, 37 insertions(+), 10 deletions(-)

diff --git a/scripts/LinuxManBook/build.sh b/scripts/LinuxManBook/build.sh
index 8e373c073..fcb8b8362 100755
--- a/scripts/LinuxManBook/build.sh
+++ b/scripts/LinuxManBook/build.sh
@@ -1,15 +1,25 @@
-#!/bin/sh
-# Copyright 2023, Alejandro Colomar <alx@kernel.org>
+#!/usr/bin/env -Sbash
+# Copyright 2023-2024, Alejandro Colomar <alx@kernel.org>
 # SPDX-License-Identifier: GPL-3.0-or-later
 
+
+test -v CAT     || CAT=cat;
+test -v PRECONV || PRECONV=preconv;
+test -v PIC     || PIC=pic;
+test -v TBL     || TBL=tbl;
+test -v EQN     || EQN=eqn;
+test -v TROFF   || TROFF=troff;
+test -v GROPDF  || GROPDF=gropdf;
+
+
 (
-	cat "$(dirname "$0")"/LMBfront.roff;
-	cat "$(dirname "$0")"/an.tmac;
+	$CAT "$(dirname "$0")"/LMBfront.roff;
+	$CAT "$(dirname "$0")"/an.tmac;
 	"$(dirname "$0")"/prepare.pl "$1";
 ) \
-| preconv \
-| pic \
-| tbl \
-| eqn -Tpdf \
-| troff -Tpdf -F"$(dirname "$0")" -dpaper=a4 \
-| gropdf -F"$(dirname "$0")" -pa4;
+| $PRECONV \
+| $PIC \
+| $TBL \
+| $EQN -Tpdf \
+| $TROFF -Tpdf -F"$(dirname "$0")" -dpaper=a4 \
+| $GROPDF -F"$(dirname "$0")" -pa4;
diff --git a/share/mk/build/book.mk b/share/mk/build/book.mk
index 63788e345..bf9e663e6 100644
--- a/share/mk/build/book.mk
+++ b/share/mk/build/book.mk
@@ -9,6 +9,9 @@ MAKEFILE_BUILD_BOOK_INCLUDED := 1
 
 
 include $(MAKEFILEDIR)/build/_.mk
+include $(MAKEFILEDIR)/configure/build-depends/coreutils.mk
+include $(MAKEFILEDIR)/configure/build-depends/groff.mk
+include $(MAKEFILEDIR)/configure/build-depends/groff-base.mk
 include $(MAKEFILEDIR)/configure/build-depends/moreutils.mk
 include $(MAKEFILEDIR)/configure/src.mk
 include $(MAKEFILEDIR)/src.mk
@@ -23,6 +26,13 @@ _LMB     := $(_MANDIR)/man-pages.pdf
 
 $(_LMB): $(MANPAGES) $(wildcard $(LMBDIR)/* $(LMBDIR)/*/*) | $$(@D)/
 	$(info	$(INFO_)Build		$@)
+	CAT='$(CAT)' \
+	PRECONV='$(PRECONV)' \
+	PIC='$(PIC)' \
+	TBL='$(TBL)' \
+	EQN='$(EQN)' \
+	TROFF='$(TROFF)' \
+	GROPDF='$(GROPDF)' \
 	$(BUILDLMB) $(MANDIR) \
 	| $(SPONGE) $@
 
diff --git a/share/mk/configure/build-depends/coreutils.mk b/share/mk/configure/build-depends/coreutils.mk
index f94800cf7..b9247c5dc 100644
--- a/share/mk/configure/build-depends/coreutils.mk
+++ b/share/mk/configure/build-depends/coreutils.mk
@@ -6,6 +6,7 @@ ifndef MAKEFILE_CONFIGURE_BUILD_DEPENDS_COREUTILS_INCLUDED
 MAKEFILE_CONFIGURE_BUILD_DEPENDS_COREUTILS_INCLUDED := 1
 
 
+CAT      := cat
 CP       := cp
 ECHO     := echo
 EXPR     := expr
diff --git a/share/mk/configure/build-depends/groff-base.mk b/share/mk/configure/build-depends/groff-base.mk
index d118b2c02..9b29b631c 100644
--- a/share/mk/configure/build-depends/groff-base.mk
+++ b/share/mk/configure/build-depends/groff-base.mk
@@ -18,6 +18,12 @@ PRECONVFLAGS         := $(DEFAULT_PRECONVFLAGS) $(EXTRA_PRECONVFLAGS)
 PRECONV              := preconv
 
 
+DEFAULT_PICFLAGS :=
+EXTRA_PICFLAGS   :=
+PICFLAGS         := $(DEFAULT_PICFLAGS) $(EXTRA_PICFLAGS)
+PIC              := pic
+
+
 TBL := tbl
 
 
-- 
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