run

#!/usr/bin/env python3
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

# This script is designed to alias common docker-compose commands used for
# running tests, development, etc. Any complicated processing should
# be done inside the container in a proper command line application
# rather than this script.

import getpass
import grp
import os
import pwd
import sys

from typing import (
    Tuple,
)

ENV_FILE_TEMPLATE = """
UID={uid}
GID={gid}
DOCKER_GID={docker_gid}
""".strip()


def get_user_uid_gid(user: str) -> Tuple[int, int]:
    """Get the uid and gid for the specified user."""
    try:
        pw_entry = pwd.getpwnam(user)

        return pw_entry.pw_uid, pw_entry.pw_gid
    except KeyError:
        sys.exit(f"Couldn't find user `{user}`")


def get_gid(group: str) -> int:
    """Get the gid for the specified group."""
    try:
        return grp.getgrnam(group).gr_gid
    except KeyError:
        sys.exit(f"Couldn't find group `{group}`")


def env_cmd():
    user = getpass.getuser()

    uid, gid = get_user_uid_gid(user)
    docker_gid = get_gid("docker")

    env_content = ENV_FILE_TEMPLATE.format(
        uid=uid,
        gid=gid,
        docker_gid=docker_gid,
    )

    print(env_content)
    return 0


COMMANDS = {
    "build": ("docker", "compose", "build"),
    "env": env_cmd,
    "hgmo": (
        "docker",
        "compose",
        "run",
        "-e",
        "TESTNAME=test",
        "test-runner",
        "/app/vct/hgmo",
    ),
    "shell": ("docker", "compose", "run", "--rm", "test-runner", "/bin/bash"),
    "tests": ("docker", "compose", "run", "--rm", "test-runner", "/app/vct/run-tests"),
}


def main(args):
    if not args or args[0] not in COMMANDS:
        print("./run [command]\n")
        print("Possible Commands:")
        for cmd in COMMANDS:
            print(f"\t{cmd}")

        return 1

    cmd = COMMANDS[args[0]]

    if callable(cmd):
        return cmd()

    cmd = list(cmd) + args[1:]

    print("$ {}".format(" ".join(cmd)))
    os.execvp(cmd[0], cmd)


if __name__ == "__main__":
    sys.exit(main(sys.argv[1:]))