CMD闪退（process exited with code 1）/ VSCode远程SSH失败

CMD闪退（process exited with code 1）

通常，CMD闪退（process exited with code 1）这个问题是由卸载Conda引起的。在Windows上安装Conda时，conda init可能会修改或创建命令处理器注册表键的“AutoRun”值，以设置环境变量或在命令提示符启动时自动执行命令。如果在卸载Conda后没有恢复默认的命令提示符设置，可能会导致命令提示符闪退，进而导致VSCode的远程SSH失败。

Because of that oversight, when a Windows user who has run conda init after conda/conda@b4f3210 attempts to uninstall Anaconda using Uninstall-Anaconda3.exe, the conda hook isn’t deleted properly from the registry by the constructor /nsis/_nsis.py script, which breaks CMD.exe and causes system instability.

解决这个问题的方法之一是通过运行conda init cmd.exe命令初始化cmd的conda环境，覆盖原有的AutoRun设置或修改原有的AutoRun。另一种方法是使用命令C:\Windows\System32\reg.exe DELETE "HKCU\Software\Microsoft\Command Processor" /v AutoRun /f·AQS356RES删除AutoRun信息。这将删除指定注册表键路径下的AutoRun键值，进而解决与其相关的问题。
查看初始化cmd.exe注册表的函数的内容如下：

def init_cmd_exe_registry(target_path, conda_prefix, reverse=False):
    # HKEY_LOCAL_MACHINE\Software\Microsoft\Command Processor\AutoRun
    # HKEY_CURRENT_USER\Software\Microsoft\Command Processor\AutoRun

    prev_value, value_type = _read_windows_registry(target_path)
    if prev_value is None:
        prev_value = ""
        value_type = winreg.REG_EXPAND_SZ

    old_hook_path = '"{}"'.format(join(conda_prefix, 'condabin', 'conda_hook.bat'))
    new_hook = 'if exist {hp} {hp}'.format(hp=old_hook_path)
    if reverse:
        # we can't just reset it to None and remove it, because there may be other contents here.
        # We need to strip out our part, and if there's nothing left, remove the key.
        # Break up string by parts joined with "&"
        autorun_parts = prev_value.split('&')
        autorun_parts = [part.strip() for part in autorun_parts if new_hook not in part]
        # We must remove the old hook path too if it is there
        autorun_parts = [part.strip() for part in autorun_parts if old_hook_path not in part]
        new_value = " & ".join(autorun_parts)
    else:
        replace_str = "__CONDA_REPLACE_ME_123__"
        # Replace new (if exist checked) hook
        new_value = re.sub(
            r'(if exist \"[^\"]*?conda[-_]hook\.bat\" \"[^\"]*?conda[-_]hook\.bat\")',
            replace_str,
            prev_value,
            count=1,
            flags=re.IGNORECASE | re.UNICODE,
        )
        # Replace old hook
        new_value = re.sub(
            r'(\"[^\"]*?conda[-_]hook\.bat\")',
            replace_str,
            new_value,
            flags=re.IGNORECASE | re.UNICODE,
        )

        # Fold repeats of 'HOOK & HOOK'
        new_value_2 = new_value.replace(replace_str + ' & ' + replace_str, replace_str)
        while new_value_2 != new_value:
            new_value = new_value_2
            new_value_2 = new_value.replace(replace_str + ' & ' + replace_str, replace_str)
        new_value = new_value_2.replace(replace_str, new_hook)
        if new_hook not in new_value:
            if new_value:
                new_value += ' & ' + new_hook
            else:
                new_value = new_hook

    if prev_value != new_value:
        if context.verbosity:
            print('\n')
            print(target_path)
            print(make_diff(prev_value, new_value))
        if not context.dry_run:
            _write_windows_registry(target_path, new_value, value_type)
        return Result.MODIFIED
    else:
        return Result.NO_CHANGE

具体而言，它会读取Windows注册表中的"AutoRun"键值，然后使用指定的conda路径创建一个新的hook，并将其添加到"AutoRun"中。如果reverse参数设置为True，则函数会将hook从"AutoRun"中删除。在更新"AutoRun"之前，函数还会进行一些其他处理，例如将重复的hook合并为一个，以及将新的hook与现有的hook合并，从而修复了CMD闪退问题。如果成功更新了"AutoRun"键值，则函数返回Result.MODIFIED；否则，函数返回Result.NO_CHANGE。

参考

https://github.com/conda/constructor/pull/521