package-harness

#!/usr/bin/env python

# Copyright (c) 2013 Galah Group LLC
# Copyright (c) 2013 Other contributers as noted in the CONTRIBUTERS file
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

import sys
import os
import os.path
import tarfile

def resolve_path(path):
    return os.path.abspath(os.path.expanduser(path))

def parse_arguments(args = sys.argv[1:]):
    from optparse import OptionParser, make_option

    option_list = [
        make_option(
            "-i", "--include", dest = "packages", action = "append",
            default = [],
            help = "Specify multiple times to add directories into the "
                   "package (for example, the directory containing Galah "
                   "interact)."
        ),
        make_option(
            "-o", "--output", dest = "output_file", action = "store",
            default = "./harness.tgz",
            help = "Specify the file where the GZipped tar file will be "
                   "written to (default: %default)."
        )
    ]

    parser = OptionParser(
        usage = "usage: %prog [options] [HARNESS_DIR]",
        description = "Tool for packaging Galah test harnesses.",
        option_list = option_list
    )

    options, args = parser.parse_args(args)

    if len(args) != 1:
        parser.error("Exactly one argument must be supplied.")

    return (options, args)

def main():
    options, args = parse_arguments()

    harness_dir = resolve_path(args[0])
    if not os.path.isdir(harness_dir):
        print >> sys.stderr, harness_dir, "is not a directory."
        exit(1)

    includes = []
    for i in options.packages:
        if os.path.exists(i):
            includes.append(resolve_path(i))
        else:
            print >> sys.stderr, i, "does not exist."
            exit(1)


    for i in (j for j in os.environ.get("GALAH_INCLUDE", "").split(",") if j):
        if os.path.exists(i):
            includes.append(resolve_path(i))
        else:
            print >> sys.stderr, i, "is in GALAH_INCLUDE environmental " \
                    "variable but does not exist. Ignoring."
            exit(1)

    with tarfile.open(resolve_path(options.output_file), mode = "w:gz") as f:
        for i in [harness_dir] + includes:
            f.add(i, arcname = os.path.relpath(i, os.path.dirname(i)))

if __name__ == "__main__":
    main()