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#!/usr/bin/env python3
import argparse
import os.path
import subprocess
SIGNATURE = (
15, 0, 13, 2,
1, 14, 3, 12,
11, 4, 9, 6,
5, 10, 7, 8,
)
SIGNATURE_32 = (
15, 0, 31, 16,
1, 14, 17, 30,
13, 2, 29, 18,
3, 12, 19, 28,
11, 4, 27, 20,
5, 10, 21, 26,
9, 6, 25, 22,
7, 8, 23, 24,
)
def get_parser():
parser = argparse.ArgumentParser()
parser.add_argument(
"--file", '-f',
help="Name of the PDF file",
)
parser.add_argument(
"--double", "-d",
action="store_true",
help="Put two signatures on 4 A4 sheet. Pages should be a "
"multiple of 32",
)
parser.add_argument(
"pagespec",
help="Page selection. At the moment only '<start>-<end>' is supported"
)
return parser
def main():
parser = get_parser()
args = parser.parse_args()
pspec = args.pagespec.split('-')
try:
start = int(pspec[0])
end = int(pspec[1])
except ValueError:
parser.print_usage()
except IndexError:
parser.print_usage()
if args.double:
signature = SIGNATURE_32
else:
signature = SIGNATURE
sig_len = len(signature)
pages = [str(i) for i in range(start, end+1)]
if len(pages) % sig_len != 0:
empty = sig_len - len(pages) % sig_len
pages = pages + ["{}"] * empty
rearranged = []
while pages:
for i in signature:
rearranged.append(pages[i])
pages = pages[sig_len:]
base, ext = os.path.splitext(args.file)
out_fname = base + '-book' + ext
subprocess.run([
'pdfjam',
'--nup', '2x2',
#'--no-tidy',
'-o', out_fname,
args.file,
','.join(rearranged)
])
if __name__ == "__main__":
main()
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