doc: Add script to build PDF files

See comments at end of doc/build_pdfs.sh

Signed-off-by: Duncan Roe <duncan_roe@optusnet.com.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/doc/build_pdfs.sh b/doc/build_pdfs.sh
new file mode 100755 (executable)
index 0000000..595909f
--- /dev/null
+++ b/doc/build_pdfs.sh
@@ -0,0 +1,51 @@
+#!/bin/sh
+for i in *.adoc nft.txt; do a2x --doctype manpage --format pdf $i; done
+exit
+
+# (This script needs dblatex in addition to the man page build requirements).
+# This script builds PDF versions of the man pages.
+# Distributors may like to place these in e.g. $DOCDIR/pdf.
+# As an example, these are the changes for the Slackware build script:
+
+8<--------------------8<--------------------8<--------------------
+
+*** nftables.SlackBuild 2018/06/05 00:30:03     1.7
+--- nftables.SlackBuild 2018/08/17 01:14:20
+***************
+*** 22,28 ****
+  
+  PKGNAM=nftables
+  VERSION=${VERSION:-$(echo $PKGNAM-*.tar.?z* | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
+! BUILD=${BUILD:-2}
+  DEBUG=${DEBUG:-false}
+  
+  NUMJOBS=${NUMJOBS:-" -j7 "}
+--- 22,28 ----
+  
+  PKGNAM=nftables
+  VERSION=${VERSION:-$(echo $PKGNAM-*.tar.?z* | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
+! BUILD=${BUILD:-3}
+  DEBUG=${DEBUG:-false}
+  
+  NUMJOBS=${NUMJOBS:-" -j7 "}
+***************
+*** 114,121 ****
+    )
+  fi
+  
+! mkdir -p $PKG/usr/doc/$PKGNAM-$VERSION
+  cp -a COPYING* INSTALL* $PKG/usr/doc/$PKGNAM-$VERSION
+  
+  mkdir -p $PKG/install
+  cat $CWD/slack-desc > $PKG/install/slack-desc
+--- 114,123 ----
+    )
+  fi
+  
+! mkdir -p $PKG/usr/doc/$PKGNAM-$VERSION/pdf
+  cp -a COPYING* INSTALL* $PKG/usr/doc/$PKGNAM-$VERSION
++ (cd doc; ./build_pdfs.sh)
++ cp -a doc/*.pdf $PKG/usr/doc/$PKGNAM-$VERSION/pdf
+  
+  mkdir -p $PKG/install
+  cat $CWD/slack-desc > $PKG/install/slack-desc