orca/orca

#!/usr/bin/env python3

# This file is copied into the user's home directory on install,
# but also can be run from the root of an Orca source checkout.

import os
import sys


MAJOR, MINOR = 3, 8

if __name__ != "__main__":
    print("why are you importing the orca command-line tool as a Python module, you absolute goofball")
    exit(1)

if sys.version_info.major < MAJOR or sys.version_info.minor < MINOR:
    print("Your Python version is too old.")
    print("Orca requires version {}.{}, but you have version {}.{}.".format(MAJOR, MINOR, sys.version_info.major, sys.version_info.minor))
    exit(1)


# If you modify this, be sure to modify the version in scripts/dev.py as well.
def check_if_source():
    def path_is_in_orca_source(path):
        dir = path
        while True:
            try:
                os.stat(os.path.join(dir, ".orcaroot"))
                return (True, dir)
            except FileNotFoundError:
                pass

            newdir = os.path.dirname(dir)
            if newdir == dir:
                return (False, None)
            dir = newdir

    in_source, current_source_dir = path_is_in_orca_source(os.getcwd())
    script_is_source, script_source_dir = path_is_in_orca_source(os.path.dirname(os.path.abspath(__file__)))

    use_source = in_source or script_is_source
    source_dir = current_source_dir or script_source_dir
    return (use_source, source_dir, script_is_source)


use_source, source_dir, is_source = check_if_source()
if use_source:
    # Use the source checkout's scripts instead of the system-installed scripts.

    if not is_source:
        print("The Orca tool is running from a local source checkout and will", file=sys.stderr)
        print("use that instead of the system Orca installation.", file=sys.stderr)
        print(file=sys.stderr)

    sys.path.append(source_dir)
    import scripts.orca
else:
    # Running from outside Orca source checkout; use system Orca install.
    import sys_scripts.orca