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xonsh v0.4.5 Release Notes

  • ➕ Added:

    • _hist_get that uses generators to filter and fetch the history commands of each session.

    • -n option to the show subcommand to choose to numerate the commands.

    • The exec command is now a first class alias that acts the same way as in sh-based languages. It replaces the current process with the command and argument that follows it. This allows xonsh to be used as a default shell while maintaining functionality with SSH, gdb, and other third party programs that assume the default shell supports raw exec command [args] syntax.

    This feature introduces some ambiguity between exec-as-a-subprocess and exec-as-a-function (the inescapable Python builtin). Though the two pieces of syntax do not overlap, they perform very different operations. Please see the xonsh FAQ for more information on trade-offs and mitigation strategies.

    • 🖨 which -v now calls superhelp, which will print highlighted source.
    • ➕ Added xontribs:
      • z (Tracks your most used directories, based on 'frecency'.) <https://github.com/AstraLuma/xontrib-z>_
    • 👍 amalgamate.py now supports relative imports.

    • history show args -t, -f, -T +T to filter commands by timestamp

    • ensure_timestamp in xonsh.tools to try and convert an object to a timestamp a.k.a float

    • $XONSH_DATETIME_FORMAT envvar, the default format to be used with datetime.datetime.strptime()

    • xon.sh script now sets $LANG=C.UTF8 in the event that no encoding is detected.

    • amalgamate.py now properly handles from __future__ imports.

    🔄 Changed:

    • _hist_show now uses _hist_get to print out the commands.
    • 📦 xonsh.completers sub-package is now fully lazy.
    • The vox xontrib now takes flags very similar to Python's venv tool. Use vox --help <command> to learn more.
    • Xontribs may now define __all__ as a module top-level to limit what gets exported to the shell context
    • 0️⃣ xon.sh uses the interpreter used to install instead of the default python3.
    • imphooks now checks directory access rights.
    • $TITLE now changes both icon (tab) and window title

    • 🏗 Moved amalgamate_source outside build_tables

    • Disable amalgamation on setup develop

    • _hist_parse_args implementation refactor

    • moved all parameter checking in _hist_get

    • _hist_show to handle numeration and timestamp printing of commands

    • xonsh.imphooks does not install the import hooks automatically, you now need to explicitly call the install_hook() method defined in this module. For example: from xonsh.imphooks import install_hook; install_hook(). The install_hook method can safely be called several times. If you need compatibility with previous versions of Xonsh you can use the following::

      from xonsh import imphooks getattr(imphooks, 'install_hook', lambda:None)()

    • xonfig command now dumps more encoding related settings.

    ✂ Removed:

    • 🏗 Anaconda Build is shutting down so we can no longer build conda development packages. All references to these packages are removed from the documentation.
    • ✂ Removed conda build recipe since the it is no longer used for Anaconda Build. The recipe used to build xonsh on conda-forge can be found here: https://github.com/conda-forge/xonsh-feedstock/blob/master/recipe/meta.yaml

    🛠 Fixed:

    • _zsh_hist_parser not parsing history files without timestamps.
    • 🛠 Fixed amalgamation of aliased imports that are already in sys.modules.
    • Xonsh will no longer fail to start in directories where the user doesn't have read access.
    • 🛠 Fixed parser error line number exception from being raised while trying to raise a SyntaxError.
    • Made pip completer more robust to when pip is not installed.
    • 🛠 Fix a startup problem on windows caused by a refactor of Prompt_toolkit. https://github.com/jonathanslenders/python-prompt-toolkit/commit/a9df2a2
    • 🛠 ensure_slice bugfix for -1 index/slice
    • Alias tab completion works again
    • 🔖 Version number reported by bundled PLY
    • xonfig no longer breaks if PLY is externally installed and version 3.8
    • 👍 LazyObject supports set union
    • 🛠 Fixed error with not sourcing files with $XONSH_ENCODING and $XONSH_ENCODING_ERRORS.
    • $IGNOREEOF envrionment variable now works properly in the prompt-toolkit shell.
    • ⚡️ Completions in jupyter_kernel.py now use updated completion framework