#!/usr/bin/python3
import argparse
import glob
import os
import subprocess
import sys


parser = argparse.ArgumentParser()
parser.add_argument("--branch", metavar='branch', default="gh-pages",
            help="branch to use (any old contents are destroyed)")
parser.add_argument('files', metavar='files', nargs='+',
            help='files to be committed')

args = parser.parse_args()

version = subprocess.getoutput("git describe --always --dirty")

fd = os.fdopen(sys.stdout.fileno(), 'wb')

fd.write(b"commit refs/heads/" + args.branch.encode('utf-8') + b"\n")
fd.write(b"committer Doc Man <noreply@example.com> now" + b"\n")
fd.write(b"data <<EOF" + b"\n")
fd.write(b"Docs built at " + version.encode('utf-8') + b"\n")
fd.write(b"EOF" + b"\n")

for fn in args.files:
    if '=' in fn:
        dest, src = fn.split('=', 1)
    else:
        dest = src = fn
    with open(src, 'rb') as f: contents = f.read()
    fd.write(b"M 644 inline " + os.path.basename(dest).encode('utf-8') + b"\n")
    fd.write(b"data " + str(len(contents)).encode("utf-8") + b"\n")
    fd.write(contents)
fd.write(b"done\n")