#!/usr/bin/env python3
# Install the static files from the source webapp tree into the target
# directory.

# I m p o r t s

import os, sys
from argparse import ArgumentParser
import shutil
from stat import S_ISDIR, S_ISREG

# V a r i a b l e s

NOT_STATIC = set([".pspx", ".pt", ".py", ".pyc"])
MYNAME = os.path.basename(sys.argv[0])
WINF = "WEB-INF"
copyfile = shutil.copy2

# F u n c t i o n s

def dir_must_exist(d):
    if not os.path.isdir(d):
        sys.stderr.write(
            "{0}: {1!r} - no such directory\n".format(MYNAME, d))
        sys.exit(2)

def copydir(source, target, exclude=True):
    for entry in os.listdir(source):
        if exclude and entry == WINF:
            continue
        if entry.startswith(".") or os.path.splitext(entry)[1] in NOT_STATIC:
            continue
        spath = os.path.join(source, entry)
        tpath = os.path.join(target, entry)
        stype = os.stat(spath).st_mode
        try:
            ttype = os.stat(tpath).st_mode
        except FileNotFoundError:
            ttype = None
        if S_ISREG(stype):
            if ttype is not None and not S_ISREG(ttype):
                sys.stderr.write(
                    "{0}: {1!r} not a file\n".format(MYNAME, tpath))
                sys.exit(1)
            if args.move:
                print("mv", repr(spath), repr(tpath))
                shutil.move(spath, tpath)
            else:
                print("cp", repr(spath), repr(tpath))
                copyfile(spath, tpath)
        elif S_ISDIR(stype):
            if ttype is not None:
                if not S_ISDIR(ttype):
                    sys.stderr.write(
                        "{0}: {1!r} not a directory\n".format(MYNAME, tpath))
                    sys.exit(1)
            else:
                print("mkdir", repr(tpath))
                os.mkdir(tpath)
            copydir(spath, tpath, False)
        else:
            sys.stderr.write(
                "{0}: warning - {1!r} not a file or directory\n".format(spath))

# M a i n   P r o g r a m

parser = ArgumentParser(prog=sys.argv[0], usage="%(prog)s [options] source target")
group = parser.add_mutually_exclusive_group()
group.add_argument("-m", "--move",
    action="store_true", help="move files instead of copying them")
group.add_argument("-n", "--no-preserve",
    action="store_true", help="DO NOT preserve modes, times, etc.")
parser.add_argument("source", nargs=1)
parser.add_argument("target", nargs=1)
args = parser.parse_args(sys.argv[1:])
source = args.source[0]
target = args.target[0]

if args.no_preserve:
    copyfile = shutil.copyfile

dir_must_exist(source)
dir_must_exist(os.path.join(source, WINF))

try:
    if not os.path.isdir(target):
        print("mkdir", repr(target))
        os.mkdir(target)
    copydir(source, target)
except (OSError, shutil.Error) as e:
    sys.stderr.write("{0}: {1!s}\n".format(MYNAME, e))
    sys.exit(1)

sys.exit(0)