add clean-pdf script

clean-pdf.sh

@@ -0,0 +1,34 @@
+#!/bin/sh
+
+set -x
+set -e
+
+[ -z "$1" ] && {
+	>&2 echo "usage: $0 FILENAME"
+	exit 1
+}
+
+file="$1"
+[ -f "$file" ] || {
+	>&2 echo "error: file $file does not exist"
+	exit 1
+}
+
+SED=sed
+if [ "$(uname -s)" = "FreeBSD" ]; then SED=gsed; fi
+
+file_noext="${file%.*}"
+
+pdftk "$file" dump_data | $SED -e 's/\(InfoValue:\)\s.*/\1\ /g' | pdftk "$file" update_info - output "$file_noext.clean.pdf"
+exiftool -all:all= "$file_noext.clean.pdf"
+exiftool -all:all "$file_noext.clean.pdf"
+exiftool -extractEmbedded -all:all "$file_noext.clean.pdf"
+qpdf --linearize "$file_noext.clean.pdf" "$file_noext.clean2.pdf"
+pdftk "$file_noext.clean2.pdf" dump_data
+exiftool "$file_noext.clean2.pdf"
+pdfinfo -meta "$file_noext.clean2.pdf"
+
+rm "$file_noext.clean.pdf"
+rm "$file_noext.clean.pdf_original"
+rm "$file"
+mv "$file_noext.clean2.pdf" "$file"