CondaInterface/__init__.py

# -*- coding: utf-8 -*-

# Copyright (c) 2019 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Package implementing the various conda related modules.
"""

from __future__ import unicode_literals
try:
    str = unicode
except NameError:
    pass

import re

from PyQt5.QtCore import QCoreApplication, QProcess

import Preferences

__CondaVersion = tuple()
__CondaVersionStr = ""


def __determineCondaVersion():
    """
    Private module function to get the conda version via the conda executable.
    """
    global __CondaVersionStr, __CondaVersion
    
    if not __CondaVersion:
        exe = Preferences.getConda("CondaExecutable")
        if not exe:
            exe = "conda"
        
        versionRe = re.compile(r"""^conda.*?(\d+\.\d+\.\d+).*""")
        
        proc = QProcess()
        proc.start(exe, ["--version"])
        if not proc.waitForStarted(15000):
            __CondaVersionStr = QCoreApplication.translate(
                "CondaInterface",
                '<conda not found or not configured.>')
        else:
            proc.waitForFinished(15000)
            output = str(proc.readAllStandardOutput(),
                         Preferences.getSystem("IOEncoding"),
                         'replace').strip()
            match = re.match(versionRe, output)
            if match:
                __CondaVersionStr = match.group(1)
                __CondaVersion = tuple(
                    int(i) for i in __CondaVersionStr.split(".")
                )
            else:
                __CondaVersionStr = QCoreApplication.translate(
                    "CondaInterface",
                    '<conda returned strange version info.')


def condaVersion():
    """
    Module function to get the conda version.
    
    @return tuple containing the conda version
    @rtype tuple of (int, int, int)
    """
    __determineCondaVersion()
    return __CondaVersion


def condaVersionStr():
    """
    Module function to get the conda version as a string.
    
    @return conda version as a string
    @rtype str
    """
    __determineCondaVersion()
    return __CondaVersionStr