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121 lines
4.6 KiB
ReStructuredText
121 lines
4.6 KiB
ReStructuredText
Static Configuration File
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=========================
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In addition to the run control file, xonsh allows you to have a static config file.
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This JSON-formatted file lives at ``$XONSH_CONFIG_DIR/config.json``, which is
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normally ``~/.config/xonsh/config.json``. The purpose of this file is to allow
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users to set runtime parameters *before* anything else happens. This includes
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loading data from various foreign shells or setting critical environment
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variables.
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This is a dictionary or JSON object at its top-level. It has the following
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top-level keys. All top-level keys are optional.
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``env``
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--------
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This is a simple string-keyed dictionary that lets you set environment
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variables. For example,
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.. code:: json
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{"env": {
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"EDITOR": "xo",
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"PAGER": "more"
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}
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}
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``xontribs``
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------------
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This is a list (JSON array) of xontrib names (strings) to load prior to
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loading any run control files. For example,
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.. code:: json
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{"xontribs": ["mpl", "example"]}
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``foreign_shells``
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--------------------
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This is a list (JSON Array) of dicts (JSON objects) that represent the
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foreign shells to inspect for extra start up information, such as environment
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variables, aliases, and foreign shell functions. The suite of data gathered
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may be expanded in the future. Each shell dictionary unpacked and passed into
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the ``xonsh.foreign_shells.foreign_shell_data()`` function. Thus, these
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dictionaries have the following structure:
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:shell: *str, required* - The name or path of the shell, such as "bash" or "/bin/sh".
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:interactive: *bool, optional* - Whether the shell should be run in interactive mode.
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``default=true``
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:login: *bool, optional* - Whether the shell should be a login shell.
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``default=false``
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:envcmd: *str, optional* - The command to generate environment output with.
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``default="env"``
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:aliascmd: *str, optional* - The command to generate alais output with.
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``default="alias"``
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:extra_args: *list of str, optional* - Addtional command line options to pass
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into the shell. ``default=[]``
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:currenv: *dict or null, optional* - Manual override for the current environment.
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``default=null``
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:safe: *bool, optional* - Flag for whether or not to safely handle exceptions
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and other errors. ``default=true``
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:prevcmd: *str, optional* - An additional command or script to run before
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anything else, useful for sourcing and other commands that may require
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environment recovery. ``default=''``
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:postcmd: *str, optional* - A command to run after everything else, useful for
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cleaning up any damage that the ``prevcmd`` may have caused. ``default=''``
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:funcscmd: *str or None, optional* - This is a command or script that can be
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used to determine the names and locations of any functions that are native
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to the foreign shell. This command should print *only* a whitespace
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separated sequence of pairs function name & filenames where the functions
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are defined. If this is None (null), then a default script will attempted
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to be looked up based on the shell name. Callable wrappers for these
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functions will be returned in the aliases dictionary. ``default=null``
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:sourcer: *str or None, optional* - How to source a foreign shell file for
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purposes of calling functions in that shell. If this is None, a default
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value will attempt to be looked up based on the shell name. ``default=null``
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:runcmd: *str or None, optional* - Command line switches to use when
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running the script, such as ``-c`` for Bash and ``/C`` for cmd.exe.
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``default=null``
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:seterrprevcmd: *str or None, optional* - Command that enables exit-on-error
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for the shell before all other commands. For example, this is "set -e" in Bash.
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To disable this exit-on-error behavior, simply pass in an empty string.
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``default=null``
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:seterrpostcmd: *str or None, optional* - Command that enables exit-on-error
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for the shell after all other commands. For example, this is
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"if errorlevel 1 exit 1" in cmd.exe. To disable this exit-on-error behavior,
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simply pass in an empty string. ``default=null``
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Some examples can be seen below:
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.. code:: json
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# load bash then zsh
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{"foreign_shells": [
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{"shell": "/bin/bash"},
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{"shell": "zsh"}
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]
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}
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# load bash as a login shell with custom rcfile
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{"foreign_shells": [
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{"shell": "bash",
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"login": true,
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"extra_args": ["--rcfile", "/path/to/rcfile"]
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}
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]
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}
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# disable all foreign shell loading via an empty list
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{"foreign_shells": []}
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Putting it all together
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-----------------------
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The following ecample shows a fully fleshed out config file.
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:download:`Download config.json <xonshconfig.json>`
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.. include:: xonshconfig.json
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:code: json
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