A script for uploading a local file to be web visible, outputting a URL

enweb.py

#!/usr/bin/python3.1

import sys
import os
import urllib.parse
from subprocess import call

if len(sys.argv) != 2:
    print("Usage: {} [FILE-OR-DIRECTORY]".format(sys.argv[0]),file=sys.stderr)
    sys.exit(1)

def vcall(command):
    print("+"+" ".join(command))
    return call(command)

source = sys.argv[1]

username = "mark"
host = "sphinx.mythic-beasts.com"
directory = "/home/mark/public_html/"

base_url = "http://mythic-beasts.com/~mark/"

# From http://stackoverflow.com/questions/35817/whats-the-best-way-to-escape-os-system-calls-in-python
def shellquote(s):
    return "'" + s.replace("'", "'\\''") + "'"

for_ssh = "{}@{}".format(username,host)

for_scp = for_ssh + ":" + shellquote(directory)

destination_path = os.path.join(directory,os.path.basename(source))

if 0 == vcall(["ssh",
              for_ssh,
              "[ -e {} ]".format(shellquote(destination_path))]):
    print("That's already been enwebbed",file=sys.stderr)
    sys.exit(1)

if 0 != vcall(["scp","-r",source,for_scp]):
    print("Failed to copy over the file or directory",file=sys.stderr)
    sys.exit(1)

if os.path.isdir(source):
    # Add a .htaccess that allows indexes:
    htaccess = os.path.join(destination_path,".htaccess")
    if 0 != vcall(["ssh",
                  for_ssh,
                  "echo 'Options +Indexes' > {}".format(shellquote(htaccess))]):
        print("Failed to add .htaccess file",file=sys.stderr)
        sys.exit(1)

# And make everything readable:
if 0 != vcall(["ssh",
               for_ssh,
               "chmod a+rX -R {}".format(shellquote(destination_path))]):
    print("Failed to make the file or directory readable",file=sys.stderr)
    sys.exit(1)

print("===> "+base_url+urllib.parse.quote(os.path.basename(source)))