https://www.oreilly.co.jp/library/4873112699/ を1つのPDFへ統合

make-make-book.sh

#!/bin/bash -ex

command -v gs > /dev/null || {
  echo "gs(ghostscript) is not found">&2
  exit 1
}

command -v curl > /dev/null || {
  echo "curl is not found">&2
  exit 1
}

BASE=https://www.oreilly.co.jp/library/4873112699/
TMPDIR="$(mktemp -d)"

curl -s "$BASE" | sed -nE 's;^.*"([^/"]+pdf)".*$;\1;p' |
sed "s;^;${BASE};g" | while read -r i
do
  curl "$i" -o "$TMPDIR/$((cnt++)).pdf"
done

ls -tr "$TMPDIR" | sed "s;^;${TMPDIR}/;g" |
xargs gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOutputFile=gnu-make-book.pdf
rm -rf "$TMPDIR"

makefile

SCRIPT=make-make-book.sh
all:	$(SCRIPT)
		bash $(SCRIPT)